TD-W503 A / B / c/ E / G / j / u

JVC K E E S v a n de M O R T E L
T ^ O K 5 H E T J V ^ : L S T R A A T 14
^s-HERTOGENBOSCH
T F T ."P^^'O^N O"? -

SERVICE MANUAL
STEREO DOUBLÉ CASSETTE DECK

TD-W503 A / B / C / E / G / J/ U

Area Suffix
A Australia
U.K.

E Continental Europe
G West Germany
J U.S.A.
U Other areas

Contents
. Page Page
[T] Safety Precautions 2 53 Wiring Connections 21
[21 Safety Precaution about TD-W503 3 U Standard Schematic Diagram 22
\3\s Location of P.C. Board Parts and Parts List
4zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
M 25
l4\s 4 |13] Exploded View of Enclosure Component Parts
[5] Instruction Book (E xtract) 5 and Parts List 30
\6\n of Main Parts 9zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
M\ Exploded View of IVIechanism Component Parts
[7] Removal of Main Parts 11 and Parts List 32
\8\n Adjustments 15 m Pacl<ing lllustration and Parts List 32
\9\< Diagram 20 M Accessories Back cover

No. 4 3 1 2
January 1990
TD-W503 A/B/C/E/G/J/U

T\y Precautioris-
1 . T h e design o f t h i s p r o d u c t c o n t a i n s s p e c i a l h a r d w a r e a n d m a n y circuits a n d c o m p o n e n t s specially for safety p u r p o s e s .
For continued protection, no changes s h o u l d be nnade to t h e o r i g i n a l design uniess a u t h o r i z e d in w r i t i n g by t h e
manufacturer. R e p l a c e m e n t p a r t s m u s t be i d e n t i c a l to t h o s e used in t h e o r i g i n a l c i r c u i t s . S e r v i c e s h o u l d be per-
formed by qualified personnel o n l y .
2 . A l t e r a t i o n s o f t h e design or c i r c u i t r y o f t h e p r o d u c t s h o u l d not be m a d e . A n y design a l t e r a t i o n s of t h e product
s h o u l d not be m a d e . A n y design a l t e r a t i o n s or a d d i t i o n s w i l l v o i d t h e m a n u f a c t u r e r ' s w a r r a n t y a n d w i l l further
relieve t h e m a n u f a c t u r e r of r e s p o n s i b i l i t y for p e r s o n a l i n j u r y or p r o p e r t y damage resulting t h e r e f r o m .
3 . M a n y e l e c t r i c a l a n d m e c h a n i c a l parts in t h e p r o d u c t have special s a f e t y - r e l a t e d c h a r a c t e r i s t i c s . T h e s e c h a r a c t e r i s t i c s
are o f t e n not e v i d e n t f r o m visual i n s p e c t i o n n o r c a n t h e p r o t e c t i o n a f f o r d e d by t h e m n e c e s s a r i l y be o b t a i n e d by
u s i n g r e p l a c e m e n t c o m p o n e n t s rated for higher voltage, w a t t a g e , e t c . R e p l a c e m e n t parts w h i c h have these special
s a f e t y c h a r a c t e r i s t i c s are i d e n t i f i e d in the P a r t s L i s t of S e r v i c e M a n u a l . E l e c t r i c a l c o m p o n e n t s having such f e a t u r e s
are i d e n t i f i e d by ( A ) o n t h e S c h e m a t i c D i a g r a m a n d P a r t s L i s t in t h e S e r v i c e M a n u a l . T h e use of a s u b s t i t u t e
r e p l a c e m e n t w h i c h does n o t h a v e the s a m e s a f e t y c h a r a c t e r i s t i c s as t h e r e c o m m e n d e d r e p l a c e m e n t part s h o w n in
t h e P a r t s L i s t of S e r v i c e M a n u a l m a y c r e a t e s h o c k , f i r e , or o t h e r h a z a r d s ,
4 . T h e leads in the p r o d u c t s are r o u t e d a n d dressed w i t h t i e s , c l a m p s , t u b i n g s , b a r r i e r s a n d the like to be separated t r o m
live p a r t s , high t e m p e r a t u r e p a r t s , m o v i n g p a r t s a n d / o r s h a r p edges for t h e p r e v e n t i o n of e l e c t r i c s h o c k and fire hazard
W h e n service is r e q u i r e d , t h e o r i g i n a l lead r o u t i n g a n d dress s h o u l d be o b s e r v e d , and it s h o u l d be c o n f i r m e d that t h e y
have been r e t u r n e d to n o r m a l , after r e - a s s e m b l i n g .
5 . L e a k a g e c u r r e n t c h e c k ( E l e c t r i c a l s h o c k h a z a r d testing)
After re-assembling the product, a l w a y s perform an i s o l a t i o n c h e c k o n t h e e x p o s e d m e t a l parts of the product
( a n t e n n a t e r m i n a l s , k n o b s , m e t a l c a b i n e t , s c r e w h e a d s , h e a d p h o n e j a c k , c o n t r o l s h a f t s , e t c . ) to be sure the p r o d u c t
is safe to o p e r a t e w i t h o u t danger of e l e c t r i c a l s h o c k .
D o not use a line i s o l a t i o n t r a n s f o r m e r d u r i n g t h i s c h e c k .
» Plug the A C line c o r d d i r e c t l y i n t o the A C o u t l e t . U s i n g a " L e a k a g e C u r r e n t T e s t e r " , measure the leakage c u r r e n t
f r o m each e x p o s e d m e t a l part o f t h e c a b i n e t , p a r t i c u l a r l y a n y e x p o s e d m e t a l part having a r e t u r n path to the
c h a s s i s , to a k n o w n g o o d e a r t h g r o u n d . A n y leakage c u r r e n t m u s t not e x c e e d 0 . 5 m A A C ( r . m . s . ) .
• Alternate check method
Plug the A C line c o r d d i r e c t l y i n t o t h e A C o u t l e t . Use an A C v o l t m e t e r having 1,000 o h m s per volt or m o r e sensi-
t i v i t y in t h e f o l l o w i n g m a n n e r . C o n n e c t - a 1 , 5 0 0 i7 1 0 W resistor p a r a l l e l e d by a O . I B f i F A C - t y p e c a p a c i t o r be-
t w e e n a n e x p o s e d m e t a l part a n d a k n o w n good earth g r o u n d .
M e a s u r e the A C voltage across the resistor w i t h the AC VOLTMETER
AC voltmeter. (Having 1 0 0 0 ohms/volt,
or more s e n s i t i v i t y )
M o v e the resistor c o n n e c t i o n to e a c h e x p o s e d m e t a l
part, particularly a n y exposed metal part having a
return path to the c h a s s i s , a n d m e a s u r e t h e A C volt-
age across t h e resistor. N o w , reverse t h e plug in the
Place this probe
A C o u t l e t a n d repeat each m e a s u r e m e n t . A n y voltage on each exposed
m e a s u r e d m u s t not e x c e e d 0 . 7 5 V A C ( r . m . s . ) . T h i s ^ 500 n 10 metal part.
c o r r e s p o n d s to 0 . 5 m A A C ( r . m . s . ) .
Good earth ground

Warning
1 . T h i s e q u i p m e n t has been designed a n d m a n u f a c t u r e d to meet i n t e r n a t i o n a l s a f e t y s t a n d a r d s .
2 . It is t h e iegal r e s p o n s i b i l i t y of the repairer to e n s u r e t h a t these s a f e t y s t a n d a r d s are m a i n t a i n e d .
3 . R e p a i r s m u s t be m a d e in a c c o r d a n c e w i t h t h e r e l e v a n t s a f e t y s t a n d a r d s .
4 . It is e s s e n t i e ! t h a t s a f e t y c r i t i c a ! c o m p o n e n t s are r e p l a c e d by a p p r o v e d p a r t s .
5 . If m a i n s voltage s e l e c t o r is p r o v i d e d , c h e c k setting for local voltage.

2 (No. 4312)
 TD-W503 A / B / C / E / G / J/ U

Important Points for Safety

• C onfirm the following points for safety of T D -W 5 0 3 .
(T) The specified plug of the power cord is "KP-10" or (6) CP jumping wires and the like are tightly bound at the
"SU-1", while the specified cord is "SPT-1", which must illustrated point to avoid touching the primary circuit
be undamaged. and heating parts.
(2) The specified strain rehef is "4N-4", which is fixed-by (T) Must be bound tightly at this point to avoid touching
the specified HE ICO tooi to f asten the power cord. the mechanism driving parts and exposed primary
(3) The hooking tabs are respectively bent by the foot of circuits.
the pattern side not to come off, and the leads are bound (§) Be careful of the following parts not to contact wires
without splints keeping a room of 3.2 mm or more. since they are heating parts.
(4) Connected points of the power cord tabs are fastened at D905, D906, IC901, Q901, Q903, Q904, Q826,
two places to prevent them from touching the P.C. board. R901,R913,R912,R931, R914, R881, R904, RA01,
(5) The specified power transformer is as follows: RA02, RB303 and RB403
J version : UL approved No. 521 6504
C version ; VTP52A3-011F
They must be tightly fixed to the P.C. board.

(No.4312)3
TD-W503zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
A/ B/ C/ E/ G/ J/ U

3l Features
1 . Doublé auto- reverse mechanism for recording/ playback 6. 2- color 6 - LED peak level meter
in deck B and playback in deck A 7. Synchro start (normal- / high- speed) dubbing
2 . Full- logic contrei mechanism in both decks 8. Metal tape com patibility
• High-speed dubbing function reduces tape editing time 9 . Aut o tape select mechanism (decks A and B)
by half. 1 0 . Single music scan mechanism for either direction
• Recording/playback mechanism with reverse head sys- (Under license from Staar S.A,, Brussels, Belgium)
tem in deck B 1 1 . Continuous playback
3 . D O LBY * HX PRO headroom extension 1 2 . Input level control
4 . D olb y* B/ C noise reduction systems 1 3 . Input balance control
• Built-in MPX filter 1 4 . PI T CH control
5 . D D RP (Dynam ics Detection Recording Processor) com- 1 5 . COM PU LI N K control system
patibility 1 6 . PH O N ES jack provided
The D D R P function is possible only when used with a 1 7 . M IC ( LEFT , RI GH T ) jacks provided
suitable J V C CD player.

3 Specifications
Type : Stereo doublé cassette deck Motors Electronic governed DC motor for
Track system : 4-track, 2-channel capstan/reel x 1
Tape speed : 4.8 cm/sec (1-7/8 inch/sec) (Normal) (for both decks A and B)
9.5 cm/sec (3-3/3 inch/sec) (High) Fast forward/
Frequency response ( - 2 0 dB recording) Rewind time Approx. 115 sec with C-60 cassette
Metal tape : 2 0 - 1 7 , 0 0 0 Hz Input terminals
3 0 - 1 6 , 0 0 0 Hz (±3 dB) L I N E IN Min. input level; 80 mV
Chrome tape : 2 0 - 1 6 , 0 0 0 Hz (x1 circuit) Input impedance; 50zyxwvutsrqponmlkjihgfedcbaZY
kSl
3 0 - 1 5 , 0 0 0 Hz (±3 dB) MICx 2 Max. sensitivity; 0.4 mV ( - 6 8 dBV)
Normal tape : 2 0 - 1 6 , 0 0 0 Hz Matching impedance; 600 fi-IO k f i
3 0 - 1 5 , 0 0 0 Hz (±3 dB) Output terminals
S/N ratio : 5 8 d B (S= 1 kHz, K3 = 3 % , LINE OUT Output level; 300 mV
N = A-weighted, Metal tape) (x1 circuit) Output impedance; 5
The S/N is improved by about 15 dB PHONES X 1 Output level; 0.3 mW/8 ü.
at 500 Hz, by max. 20 dB at 1 kHz - Matching impedance; 8 12—1 kfZ
10 kHz with D O L B Y C NR on and Other terminals COMPU L I N K - 1 / S Y N C H R 0 x 2
improved by 5 d B at 1 kHz and l O d B Power requirement
at above 5 kHz with D O L B Y B NR on TD-W503A/B A C 240 V , 50/60 Hz
Improvement of M O L : 4 dB at 10 kHz with D O L B Y C TD-W503C/J A C 120 V , 60 Hz
NR on TD-W503E/G A C 220 V , 50/60 Hz
Wow and flutter : 0.08% (WRMS). TD-W503U A C 230/127/110 V , 50/60 Hz
Crosstalk : 60 dB (1 kHz) Power consumption With power on; 18 W
Harmonie distortion : K 3 ; 0 . 5 % , T H D ; 1.0% With power switch stand-by; 1.5 W
(Metal tape, 1 k H z , O dB) Dimensions 435 X 123 X 288 mm
Channel separation : 4 0 d B (1 kHz) ( W x H X D) (17-3/16" X 4-7/8" X 11-3/8")
Heads : D e c k A ; M E T A P E R M head for play- Weight 4.5 kg (10.0 Ibs)
back Accessories Pin plug cord x 2
D e ck B; M E T A P E R M head for record-
Remote cable x 1
ing/playback, 2-gap ferrite head for
D esign an d sp e ci f i ca t i o n s are su b j e ct t o ch a n g e w i t h o u t n o t i ce .
erasure; Combination head x 1

4 (No. 4 3 1 2 )
 TD-W503 A/B/C/E/G/J/U

5] Instructon Book (Extract)

NAMES OF PARTS AND THEIR
FUNCTIONS

O Cassette holder (deck B) O REVERSE MODE switch II PAUSE:

O TAPE COUNTER and Reset button (deck B) S e l e c t single or full record/playback m o d e , or Press to stop the tape temporarily during
O INPUT LEVEL control continuous play m o d e . (See page 2 9 . ) recording and playback.
A d j u s t the recording level with this control. i * : For a single-side recording or playback. Press the P L A Y button to release the pause
O PITCH control (deck A) : T o record or play sides A and B. zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLK
mode.
Varies the tape s p e e d in deck A in the range C^ : T o play sides A and B continuously. 4l»(direction):
of about ± 1 0 % . H o w e v e r , it cannot change O POWER switch P r e s s to c h a n g e the direction of tape travel. zyxwvuts
the tape s p e e d in the high-speed dubbing. O Cassette holder (deck A) «:
Turning it counterclocl^wise toward " S L O W " O PEAK LEVEL INDICATOR Press to fast w i n d the tape from right to left.
c a u s e s the tape s p e e d to d e c r e a s e w h i l e T h e s e indicate the recording level during PLAY:
turning c i o c k w i s e toward " F A S T " c a u s e s it to recording and output level during playback. Press to playback or record the tape.
increase. T h e center ciick position is for the T h e L E D indication varies with the signal P r e s s t h i s button w i t h t h e or
Standard s p e e d . ( S e e page 23.) strength during recording and playback. button for m u s i c scanning.
® PHONESjack O Indicators :
C o n n e c t h e a d p h o n e s (with an i m p e d a n c e of zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
A-DECK Press to fast w i n d the tape from left to right.
8Q - lkS2). • RUN • (stop):
O Cassette operation buttons (deck A) Blinks w h e n the tape is running in deck A. Press to stop the tape. Also press to stop
• (stop): Blinks t w i c e w h e n s c a n n i n g . both d e c k s simultaneously during dubbing.
P r e s s to stop the tape. DUBBING Mie jacks (LEFT, RIGHT)
• DUB C o n n e c t microphones (with an impedance of
P r e s s to w i n d the tape from right to left. T h i s lights to indicate that the unit is in the 6 0 0 a to 10 kO) to t h e s e j a c k s .
PLAY: dubbing mode. W i t h microphones connected to t h e s e jacks,
P r e s s to play the tape. • HIGH the input to L I N E IN ( R E C ) terminals is cut
Press this button with the or T h i s lights w h e n in the high-speed dub- off automatically.
•^M button for m u s i c s c a n n i n g . bing. i BALANCE control
B-DECK Adjusts the balance b e t w e e n the left and
P r e s s to w i n d the tape from left to right. • REC
zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
right signal inputs.
' 4 i »'(direction): T h i s lights w h e n deck B is in the record-
Press to c h a n g e the direction of tape ing and r e c o r d - p a u s e m o d e s ; blinks w h e n
travel. in the ree mute m o d e .
When the D D R P signal is r e c e i v e d , the
® A-DECK E J E C T button
green indicator lights. W h e n DDRP
P r e s s to open the c a s s e t t e holder of d e c k A.
recording is being p e r f o r m e d , the indi-
® A • B SYNCHRO DUBBING button
cator t u r n s r e d .
P r e s s to dub from deck A to d e c k B.
(When t h e D D R P signal is received after
• NORM SPEED:
t h e deck I s set to the rec-pause m o d e , the
P r e s s to perform n o r m a l - s p e e d dubbing.
green indicator does not light.)
• HIGH SPEED:
• RUN
P r e s s to perform high-speed dubbing.
Blinks w h e n the tape is running in deck B.
O DOLBY NR switch
Lights w h e n in the temporary pause mode.
Set to B or C for recording using the Dolby NR
Blinks t w i c e w h e n scanning.
s y s t e m or for playing back a tape that w a s
A-DECK DIRECTION
recorded using the Dolby NR s y s t e m . S e t to
B-DECK DIRECTION
O F F w h e n the Dolby NR s y s t e m is not u s e d .
• B-DECK EJECT button • REV
Lights w h e n the tape is running in the re-
P r e s s to open the c a s s e t t e holder of deck B.
v e r s e direction.
O Cassette operation buttons (deck B| zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
O REC/REC MUTE: • FWD
P r e s s the P L A Y button while pressing this Lights w h e n the tape is running in the for-
button for recording, and press to leave an w a r d direction.
appropriate non-recorded s e c t i o n . (Refer to
page 25.)

(No. 4312) 5
TD-W503 A/B/C/E/G/J/U

PLAYBACK
POWER
.ONiSTAMJB» DOLBY NR
OFF B C
0 REVERSE MODE
T - | I I—7

I trm I

Playback of deck A P l a y b a c k of d e c k B

— O p e r a t i o n in the order o f the n u m b e r s in the illustration — P e r f o r m steps 0 t o @ o f t h e above p r o c e d u r e f o r d e c k B .

OzyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
Press t h e P O W E R s w i t c h t o set t o O N ( — ) .
C o n t i n u o u s play
0 L o a d a p r e r e c o r d e d cassette w i t h side A f a c i n g o u t .
F i r s t set the R E V E R S E M O D E s w i t c h t o O .
Q S e l e c t the side t o be p l a y e d b a c k .
L o a d c a s s e t t e tapes in b o t h d e c k s a n d press t h e P L A Y but-
S i d e A . . . F o r w a r d d i r e c t i o n (zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
ÏÏM> )
t o n o f t h e d e c k t o be p l a y e d f i r s t f o r c o n t i n u o u s p l a y o f
Side B . . . Reverse direction ( < M ] )
b o t h d e c k s . W h e n t h e tape in t h e d e c k w h i c h p l a y s f i r s t
0 Set to the same D O L B Y N R switch position that was
reaches t h e e n d o f side B (in t h e reverse d i r e c t i o n ) , i t a u t o -
used w h e n t h e tape w a s recorded.
m a t i c a l l y s w i t c h e s t o t h e f o r w a r d d i r e c t i o n a n d enters t h e
0 Select the R E V E R S E M O D E .
s t a n d b y m o d e . A t t h e same t i m e , t h e o t h e r d e c k starts p l a y -
0 Press t h e P L A Y b u t t o n t o s t a r t p l a y b a c k .
back. These operations continue between decks A and B.
W h i l e o n e d e c k is p l a y i n g b a c k , t h e cassette in t h e o t h e r
one c a n be r e p l a c e d . T h i s is c o n v e n i e n t t o t h e long-time
playback of background m u s i c .
• Press t h e • ( s t o p ) b u t t o n o f t h e d e c k t h a t is r u n n i n g t o
stop continuous play.
N o t e : U s e tapes r e c o r d e d u s i n g the same N R m o d e in d e c k s
A and B.

RECORDING
POWER O B-DECK DOLBY NR
*ONB.STANDBY
EJECT OFF B c

[rm

REC;
REC MUTE PAUSE BALANCE
TAPE OXINTER
REVERSE MODE

0 0 0 PLAY

RIGHT

D e c k B only

— Operate in the order o f the numbers in the illustration —

O Press t h e P O W E R s w i t c h t o set t o O N ( — ) . 0 S e t the R E V E R S E M O D E s w i t c h as d e s i r e d .

0 L o a d a cassette f o r r e c o r d i n g . 0 Press t o " 0 0 0 " .
0 S e t t h e D O L B Y N R s w i t c h as r e q u i r e d . 0 Press t h e P L A Y b u t t o n t o s t a r t r e c o r d i n g .
0 S e l e c t t h e side t o be r e c o r d e d .
W h e n D D R P r e c o r d i n g is p e r f o r m e d w i t h a s u i t a b l e J V C
0 Press t h e I I P A U S E button and O R E C / R E C MUTE
CD p l a y e r , t h e r e c o r d i n g level is a d j u s t e d a u t o m a t i c a l l y
button simultaneously (record-pause m o d e ) . T h e R E C
w h e n t h e D D R P b u t t o n o f t h e C D p l a y e r is p r e s s e d , after
and R U N indicators light.
w h i c h recording starts.
0 A d j u s t the recording level.

6 (No. 4 3 1 2 )
 TD-W503 zyxwvutsrqpo
A/B/C/E/G/J/U

DUBBING
O POW ER
A-DECK B-DECK
EJECT EJECT

O TAF=E COUNTER
0
A»-B SVNCHflO DUBBING

° °° A NOfW 5 P E E D | HIGH S P E E D 1

M
• Sy nchr o dubbing Dubbing and D O L B Y NR switch
O Press the POWER switch to ON ( ). During dubbing, the same NR mode selected for the play-
Q Insert a pre-recorded tape into decl< A with side A facing back cassette is applied to the recording cassette, regardless
out and press the -^l^ (direction) button to select the of the position of the NR switch.
tape travel direction.
0 Insert the blank tape with side A facing out into deck B, Input level
and press the -^l^ (direction) button to select the side Recording is performed at the same level as the playback
tape during dubbing regardless of the position of the I N P U T
to be recorded.
L E V E L control.
O Push the counter reset button to reset to " 0 0 0 " .
0 Press the S Y N C H R O D U B B ING (NO RIVl or H I G H S P E E D ) Tape editing
button to start dubbing.
Use the music scan facility of deck A and synchro normal-
0 Press the • (stop) button of deck B to stop dubbing.
speed dubbing facility for tape editing to make your own
When deck B stops, the dubbing mode is automatically
original tapes.
released.
Procedure
• Synchro record muting 1. Scan to the required tune with deck A .
When deck A stops or enters any nnode other than the 2. Press the NORM S P E E D dubbing button to start the
playback mode during dubbing, deck B enters the record dubbing.
mute operation automatically and then enters the record- 3. When the deck A tune finishes, scan to the next tune.
pause mode. Deck B automatically enters the record muting mode
and leaves a non-recorded section of about 4 seconds
• Before pressing the S Y N C H R O D U B B I N G button then enters the record-pause mode.
Confirm that deck B is in the stop mode before starting
4. After scanning, press the NORM S P E E D dubbing button
dubbing. again to start the dubbing of the next tune.
Repeat these operations to edit your favorite tunes in
any required order.

(No. 4312) 7
TD-W503 A/B/C/E/G/J/U

Erasing COMPU LINK CONTROL SYSTEM

When recording on a prerecorded tape, the previous record-
This is a convenient system which has been originated and
ing is automatically erased and only the new program is
developed by J V C . The following are the brief explanations
recorded on the tape.
of its major performances.
T o erase a tape without making a new recording . . . Automatic Source Selection
Follow the section " R E C O R D I N G " but in step 0 set the When the provided remote cables are used for connecting
I N P U T L E V E L contrei to IVIIN. this unit to other components which have COMPU L I N K - 1
terminals, the switchover of all system components is
Dolby NR System possible with simple one-touch of the source selector
T o reduce the hiss inherent in tape recording, use the Dolby button of J V C ' s amplifier or receiver. By doing this, the
NR System when mal<ing recording. When listenipg to a corresponding component will start playing automatically.
tape recorded with the Dolby NR System, set the D O L B Y The source select button of the remote control unit or the
NR switch to B or C according to the system selected in the activation button of the desired component can be also
recording mode. used for this purpose.
Note:The sound quality will change if the positions of the When the components have been switched over, the pre-
D O L B Y NR switch are different in recording and vious component will stop playing within five seconds.
playback.
Synchronized Recording
When the D O L B Y NR switch is set to B or C , the
Synchronized recording refers to the process in which the
MPX filter is activated.
deck starts recording in synchronism with the C D player.
Perform the synchronized recording as follows:
Dolby HX P R O headroom extension
1. Set the cassette deck to the record-pause mode in accord-
When a source which contains many high-frequency com-
ance with the recording procedures on page 6.
ponents is recorded, these high-frequency signals have the
2. If you want the programmed recording, program the
same function as bias and therefore, the effective bias cur-
desired tunes in any order you wish to hear.
rent changes. This will result in phenomena such as changes
3. Press the P L A Y / P A U S E button of the C D player. By so
in the level of low-frequency signal and subsequent dis-
doing, the cassette deck is placed in the record mode and
tortion and reduction of the high-frequency saturation level.
synchronized with the C D player for recording. Synchro-
Dolby H X P R O headroom extension system controls the nized recording thus can be made possible.
bias current so that the effective bias is constant even when
there are fluctuations in the high-frequency components of DDRP (Dynamics Detection Recording Processor) Recording
the input signal. This greatly improves the high-frequency The D D R P function makes possible fully automatic record-
saturation level while reducing the low-frequency signal ing when used with a suitable J V C CD player. When the
level variations and distortion. D D R P button of a suitable J V C CD player is pressed, the
recording level is first adjusted automatically, then record-
• The dynamic sound recorded with this system sounds
ing starts; it is not necessary to start recording by the
the same even when the tape is played back in a deck
normal procedure.
that does not have Dolby H X P R O .
• This system automatically works when in recording; Notes:
however, Dolby H X P R O is not a noise reduction system. • Synchronized recording or D D R P recording stops auto-
matically when the CD player stops playing.
• T o cancel synchronized recording or D D R P recording,
press the S T O P button of the CD player or cassette deck.
• Synchronized recording does not start except when the
record-pause mode is set by simultaneously pressing the
O R E C / R E C IVIUTE and II P A U S E button in the stop
mode.

8(No.4312)
 r
TD-W503 A/ B/ C / E / G / J/ U

(No. 4312) 9
TD-W 503 A / B / C / E / G / J / U

D E CK A : Mechanism View

Supply Reel Disk Take-up Reel Disk Solenoid RF Clutcii Ass'y

JlÊKL

R I * li V zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
4.'
-Capstan

Rotary P.B. Head FM Bracket Motor

Pinch Roller Pinch Roller Mechanism Control Board
Fig. 6-2 Fig. 6-3

D E C K [ B ] : iVlechanism View

Supply Reel Disk Take-up Reel Disk Solenoid RF Clutch Ass'y

Capstan

Pinch Roller Pinch Roller FM Bracket Motor

Rotary R/P & Erase Head Mechanism Control Board

Fig. 6 ^ Fig. 6-5

10(No.4312)
 TD-W503 A / B / C/ E/ G/ J / U

Tl R e m o v a l of M ai n P ar t s

The majority of the connectors used

in this model is as shown below.
Refer to the figure for disconnect-
ing the parallel wire.

Pull out the

parallel w ir e.

Pull out in _^
the direction
of an arrow

A-4PW,CN8I5
B-5PIN,CN8I2
C-4PIN,CN703
D-6HN,CN70€707
E-4PIN,CN702
F-6P IN^N704705
G-5RN,CN8I3 8I4
H-4PIN,CN70I
-7PIN,CN80I
J -3P W , CN802
K-IIPIN,WI
L - I3PIN,W2

Fig. 7-1

• Enclosur e sections 3. Removal of the f ront panel assembly and the main P.C.
board
1. T op cover
1) Pull out eight parallel wire connecting the main board
1) Remove four screws (T) retaining the both sides of the
top cover.
2) Pull out 7-pin connector© connecting the main board.
2) Remove two screws (2) retaining the rear side of the top
3) Pull out 3-pin connector © connecting the main board.
cover, and take off the top cover.
4) Pull out 11-pin connector © connecting the mecha-
2 . Bottom cover
nism [A] control board.
1) Remove three screws (s) retaining the rear side of the
5) Pull out 13-pin connector © connecting the mecha-
bottom cover.
nism [B] control board.
2) Remove two screws (4) retaining the front side of the
6) Remove four screws © retaining the both sides of the
bottom cover, and take off the bottom cover.
front panel assembly.

(No.4312) 11
TD-W503zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
A/B/C/E/G/J/U

4. Removal of LED display board (Refer to Fig. 7-1.) 8. Cassette bolder assembly
Disengage two pawls (G) retaining the front panel assem- 1) Remove two arm shaft (Tl) from the left side cassette
bly. holder bracket.
5. Removal of DOLBY NR switch board 2) Remove two arm shafts (12) from the right side cassette
Disengage two pawls (7) retaining the front panel assem- holder bracket.
bly. 9. Cassette holder bracket
1) Remove two screws @ retaining the left side cassette
6. Mechanism assembly;
holder bracket.
1) Remove five screws ( S ) retaining the mechanism [A] 2) Remove two screws @ retaining the right side cassette
assembly. holder bracket.
2) Remove five screws ( 9 ) retaining the mechanism [~B]
assembly.
7. Dump gear
Remove two screws @ retaining the both dump gears.

12 (No. 4 3 1 2 )
 TD-W503 A/ B/ C / E / G / J/ U

FW 8

Fig. 7-3

10. Operation switoh board 12. Power transformer

Remove four screvivs (15) retaining the operation switch 1) Pull out the 3-pin parallel wire from power transformer
board, board.
11. Front panel assembly 2) Remove four screws @ retaining the power transformer.
1) Puil out the input leve! knob from the input level/mic. 13. Main P.C. board
jack board. 1) Remove the screw (19) retaining the main P.C. board
2) Remove three screws (fs) retaining the input level/mic. from the right side bracket.
jack board. 2) Remove four screws (5^ retaining the main P.C. board
3) Remove three screws (17) retaining the power switch from the rear panel.
board.

( N o . 4 3 1 2 ) 13
TD-W 503zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
A/ B/ C/ E/ G/ J/ U

• Mechanism section
(9) R/ F C l u t ch ( 9 )

Disengage the
Fig. 7-4 pswi-

Head Base Stud

(10)
F i g . 7-6 F i g . 7-7

1 . Head assembly 2. Pull out the f i y w h e e l a s s ' y . (Since a belt is engaged w i t h

1} R e m o v e t h e h e a d w i r e f r o m t h e w i r e h o i d e r . the f i y w h e e l on the take-up side, disengage the belt f r o m
2 ) P r o t e c t t h e h e a d gap ( c o v e r w i t h paper a n d t a p e ) . the R / F c l u t c h beforehand.)
3) G e n t l y r e m o v e t h e 2 s c r e w s ® fronn h e a d h o i d e r .

M o t e : if t h e s c r e v ^ ® is h a r d t o l o o s e n , s l i g h t i y h e a t H R e p l a c e m e n t o f leaf s w i t c h

s c r e w sealant securing the s c r e w (§) by a soldering 1 . R e m o v e t w o screws © s e c u r i n g t h e s w i t c h p r o t e c t o r .

2. D e t a c h the switch from t h e P.C. b o a r d .
i r o n t o s o f t e n it.

2. H e a d m o u n t a s s e m b i y H D i s k uriiï, solenoid, !eaf s w i t c h board a s s ' y

1) R e m o v e o n e s c r e w ( ï ) h o l d i n g t h e head r e i a y b o a r d . 1 . R e m o v e t h e b r a c k e t of t h e leaf s w i t c h p r o t e c t o r .
2. R e m o v e t w o s c r e w s ( g ) s e c u r i n g t h e d i s k base a s s ' y .
2 ) R e m o v e t w o s c r e w s (5) f a s t e n i n g t h e head m o u n t ass'y-
(The take-up s u p p l y d i s k a s s ' y can be r e m o v e d at t h i s

• Pinch roller ass'y stage.)

Disengage t h e pav>/l o f t h e p i n c h roüer a s s ' y a n d p y l i it

ra C a m gear
u p (see t h e f i g u r e o n t h e r i g h t ) .
A t this time, the return spring comes off. 1 . Disengage t h e spring ® o f t h e '.ever, a n d t h e n r e m o v e
the washer @ o f the lever.
2. R e m o v e the washer @ o f t h e c a m gear.
E Motor bracket and Motor ass'y
3. F o r reassembling t h e c a m gear, refer t o t h e ü i u s t r a t i o n .
1 . R e m o v e a s c r e w ( 4 ) s e c u r i n g t h e e j e c t lever.
2. R e m o v e t h r e e s c r e w s (§) s e c u r i n g t h e b r a c k e t of t h e
B itflain gear
motor.
1 . R e m o v e t h e E-ring s e c u r i n g t h e gear a n d p u i ! t h e m a i n
gear upwards.
* F i y w h e e l ass'y
2. F o r reassembling t h e m a i n gear, refer t o t h e ü i u s t r a t i o n .
1 . R e m o v e t h e w a s h e r (7) of t h e c a p s t a n s h a f t .

14(No.4312)
 TD-W503 A/B/C/E/G/J/U

8] Main Adjustments
1. Measuring instruments required for adjustment
(1) Low-frequency oscillator (oscillation frequency 50 H z — (5) Recording reference tapes
20 kHz, O dB output with 600 f2 impedance) TS-12 or TS-8 (UD1), TS-10 or AC-513 (SA),TS-11 or
(2) Attenuator (600 n impedance) AC-712 (MA) or equivalent
(3) Electronic voltmeter (Use the standerd tapes specified by this department.)
(4) Standard tapes (6) 600 n resistors (for attenuator matching)
V T T 7 1 2 (tape speed, wow & flutter measurements) (7) Distortion meter (bandpass filter)
V T T 7 2 4 (reference level) (8) Torque gauge (cassette) for CTG-N mechanism adjust-
TIV1T735, V T T 7 3 9 (playback frequency) ments
T M T 6 4 4 7 (music scan) (9) Wow & flutter gauge
TIVIT6448 (music scan) (10) Frequency counter
V T T 7 0 3 (10 kHz) (11) M300 gauge
(12) Band pass filter
2. Mechanicam adjustment
Afterhead repiacements,use the following method to check
after the height, direction and t i l t (rough) of each head have
been adjusted.
Tape travel adjustment
Use the IV1300 gauge. Be sure not to darnage the head.

Tape guide adjustment method

Retlection position
(guide post)

D i r e c t i o n o f gauge r n o v e m e n t

Use t i i e j i g t o m o v e i n t t i e
d i r e c t i o n o f the arrow.

Fig. 8-1

Tape to be used/ Adjustment and chec'cing

Items Standard Adiüsting points
method
Tape M300 gauge The tape should not be Adjust the tape guide heights Refer to the iüiistraticn
transport and curied or stretched during so that the gauge passes bei OW.
adjustment C-90 tape travel. through the guide smoothiy.
Confirm it in both forward (Apply screw locking com-
Note: and reverse directions. pound after adjustment.)
Normaüy, the tape travel
Tape guide a d j u s t m e n t
can only be adjusted at
(screwdriver)
tape guide.

Azimuth i est tape Phase deviation should not Adjust the i-WD side and then
adjustment VTT703 occur when the output is the REVside.
maximum.

FWDside REVside

(i\io.4312) 15
TD-W503 A/8/C/E/G/J/U

Adjusting Standard
item Adjustme nt Remarks
po int vaiue
Tape speed Connect an electronic counter to the Deck lAJ NORM speed: !Mote :To set to the high-speed
adjustment LINE O U T terminals. NORM: 3000 + 15HZ mode, make a short circuit
Play back the V T T 7 1 2 test tape. VR702 between terminals.
After the High-speed adjustment, per- HiGH: HIGH speed:
f o r m the Normal-speed adjustment. VR701 6000 + 3 0 Hz
1) Set the pitch control VR to the
center detent position. Deck [U
2) Adjust the normal speed of the deck NORM:
|A! to 3000 Hz w i t h V R702 (V R704 VR704
for the deck [ B ] ) . HIGH:
3) Shortcircuit between TF'701 and VR703
TP702 for high-speed adjustment,
and adjust VR701 and V R 7 0 3 so
that motor speed becomes 6000 ±
30 Hz at the forced high-speed.

Checking wow Connect a wow and flutter meter to 0.11% if the reading becomes moving
and fiutter the LI N E OUT terminals. (JIS WTD) vaiue even if conforming to the
Play back the V T T 7 1 2 test tape. Standard,a reclaim may be raised.
Check to see if the reading of the meter Repairs are necessary.
is w i t h i n 0 . 1 1 % (JIS W T D ) .

Checking piay- Employ a torque testing cassette tape 3 0 - 7 0 gr-cm if the Standard torque is not
bacic torque for the checking, or remove the cassette obtained, replace the take-up
cover and use a torque gauge. disc assem.bly.

Checking fast IVleasure the torque in the fast forward 7 0 - 1 6 0 gr-cm

forward torque mode in the same manner as in the
above.
Checking rewind IVleasure the torque in the rewind mode 70—160 gr-cm
torque in the same manner as in the above.

16 (No. 4312)
 T D - W 5 0 3zyxwvutsrqpon
A/ B/ C / E / G / J/ U

3. Electrical adjustments location

Main Amp. P.W. Board (parts assembly side view)

DECK E
Recording g a i n a d j .

F ront VR106
_DECK [A]
VR206 VR203[RJ- Playback gain a d j .

VR20^[R1-
VR103[L]—
-DECK 13
V R I O ^j T ] — Piaybacl< f r e q u e n c y
response a d j .
T.P. Bias f r e q u e n c y
test p o i n t
_DECK [ g
vRioirn- Playbacl< gain a d j .
Bias c u t C821
(Siiortcircuit between VR102 |T]-
L801
TP801 andTP802.) VR20I[R]-
TP801-VV _DECK 1]
Normal speed a d j . -Bias frequency a d j . VR202[ÏÏ]-
Playbacl< f r e q u e n c y
T o set t o t h e H igh- spe e d TP802-'^ response a d j .
mode , ma ke a shortcircuit
DECK S
b e tw e e n t e r m i n a l s . RB303
RB403 rf-^,— HX PRO Test point
DECK IJ
^p. TP701 I—VRB41 LB401 LB301
Recording f r e q u e n c y
MRIOA VR703 ^ TP702 responce a d j . VRB31 -HX PRO A d j .

High speed a d j .

Fig. 8-2

(No. 431 2) 17
TD-W503zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
A / B / C / E / G / J/ U

4 . E lectrical circuit a djustme nt procedure

Perform the tape transport checks and head azimuth adjustment before following checks and adjustments.
Adjustment should be performeti in the order of alignment tape.
In the steps marked with an asterisk ( * ), adjustment should be performed after replacing the heads.
Perform this adjustment with the NR switch set to O F F .
Ref. input level : - 8 dBs ( L I N E IN; - 2 0 dB ± 2 dB, IVIIC IN ; - 6 8 dB + 3 dB)
(0dBs= 0.775V)
Step Item Check and Adjustm ent
Input signal (frequency, level) Output raise value, deviation value
1 Checking Signal input: L I N E IN D O L B Y B 1 k H z , C a l . - 4 0 dB +5.7 dB ± 2 dB
DOLBY Cal. level: 4 0 0 Hz, (Ree) 5 k H z , Cal. - 2 0 dB +3.5 dB ± 1.5 dB
circuit - 8 . 2 dBs
1 kHz, Cal. 0 d B l ^ ; ^ dB
(Ree mode)
Output terminal: DOLBYC 1 k H z , C a l , - 4 0 dB + 16.2 dB+3 dB
(BIAS,CUT)
CNA02(7)&(g) (Ree) 5 k H z , C a l . - 2 0 dB +2.9 dB ±2.5 dB
Pin 7 : R-ch
Pin 8 : L-ch 1 k H z , Cal. O d B ± 1 dB

Adjustlng Standard
Step Item Adjustm ent Rem arks
point value
*2 Playback gain Play back V T T 7 2 4 , then confirm that the Deck 0 LINE OUT: When the head is replaeed,
adjustment level at L I N E O U T is - 8 . 0 d B s l J | dB. L : VR103 -8.0+ 1 ,1 dBs adjust playback gain level.
Adjust V R 1 0 3 , V R 2 0 3 and V R I Ö I , VR- R: V R 2 0 3 H. P H O N E
201 so that L I N E O U T level becomes Deck M OUT:
- 8 . 0 dBs. L : VR101 -24.0+^1 dBs
Headphone output check: —24 dBs R : VR201
L-R level differenee: 2 dB or less
*3 Playback Play back TI\/IT7063, then confirm that Deck [A] Deck [A]: For adjustment in reverse tape
frequency the level of 1 kHz and 12.5 kHz signals is L : VR104 1 ±0.5 dB running, set the cassette with
response the St andard value. R : VR204 Deck [B]: the side B facing this side.
adjustment Adjust V R 1 0 2 , V R 2 0 2 and V R 1 0 4 , VR- Deck [B] 0.5 ±0.5 dB (Differenee in PB output levels
204 so that L I N E O U T level becomes L : VR102 of 125 kHz, 1 kHz & 8 kHz
0.5 d B . R : VR202 signals must be within 3 dB.)
*4 Bias Conneet the frequency counter to the L801 95kHz±1Hz M E T A L position
frequency C821 lead through a 1.0 MSI resistor,then
adjustment adjust L 8 0 1 so that the counter reads
95 kHz.
*5 HX PRO 1) Make sure to perform this adjustment L : LB301 Minimum
adjustment after the Bias frequency adjustment of R : LB401 voltages
the above step 4.
2) Adjust L B 3 0 1 and L B 4 0 T to obtain
minimum voltages at the both ends of
RB303and RB404.
*6 Recording 1) NR switch : O F F For Normal With respect CrOa : 50 Hz . . . 0 ± 3 dB
frequency 2) Record a 1 kHz signal at an input refer- tape t o 1 kHz 12.5kHz. 0±3dB
response ence level of —20 dB, then record L : VRB31 referenee: Metal : 50 Hz . . . 0 ± 3 d B
adjustment 50 Hz and 12.5 kHz signals and play R : VRB41 At 50 Hz; 12.5kHz. 0±3dB
them back. At this time, adjust V R B 3 1 0±3dB
and V R B 4 1 so that the deviation of A t 12.5 kHz
50 Hz and 12.5 kHz outputs satisfy the +0.5+0.5dB
St andard values with respect to 1 kHz
output.
Response (d 3) Increase in high frequencies [jjgg :urrent

•— ^ ^ ^ ""^ ^ ^ ^ ^ Appropriate bias current

D ecrease in high f requencies \ h bias c jrrent
0 5 0 Hz 1 kHz 1 2 . 5 kHz Frequencies

18 (No. 4 3 1 2 )
 r

T D - W5 0 3 A/ B/ C/ E/ G/ J/ U

Adjusting Standard
Step Item Adjustment Remarks
point value
*1 Checking Connect a 1 resistor to the erase head Normal tape: This adjustment must be per-
erase current terminal, and confirm that the voltage at 60 mV ± 1 5 % formed after completion of
the both ends meets the speclfications in CrOz tape: the bias current adjustment.
the Ree. mode. • 8 8 m V ±15%
Metal tape:
165mV + 1 5 %
*8 Recording 1) Apply a 1 kHz signal to the L I N E IN For Normal Normal tape:
gain terminal, record a 1 kHz signal at refer- tape: - 8 ± 0.5 dBs
adjustment ence level ( - 8 d B s ) input for both ( L L : VR106 CrOz tape:
and R ) channeis on a normal tape. R: V R 2 0 6 - 8 ±1.5 dBs
2) Play back the recorded part, and adjust Metal tape:
the recording level controls so that - 8 ±1.5 dBs
L I N E O U T terminal level becomes
- 8 dBs.
Then adjust V R 1 0 6 and V R 2 0 6 so
that L I N E O U T terminal level becomes
- 8 dBs.
*9 Checking 1) Record a 1 k H z , - 2 0 dB (reference Normal tape: Be sure to perform this check-
record/ level) signal to L I N E IN terminals. Less than 2 % ing bias current and recording
playback 2) Play back the recorded part. Check the C r 0 2 tape: level checking.
distortion output with a distortion meter to see if Less than 3 %
the value conforms to the St andard Metal tape:
value. Less than 2 %
(THD)
10 Signal to Record 1 kHz, - 2 0 dB (reference level) Normal,CrOj Apply an input level to L I N E
noise ratio signal inputted through the L I N E IN ter- & Metal tapes: IN terminals with the record-
minals, and, in mid course of the record- More than ing level controls set to maxi-
ing, stop inputting the signal and con- 42 dB mum so that the peak level
tinue recording without any input signal. indicator reads 0 d B .
No input siqnal

1 1 ST OP
- 2 0 dB ! 1
1- —Recording part »-l

11 Checking 1) Apply a 1 k H z , - 2 0 d B (reference level) More than For the measurement using a
erasing signal to the L I N E IN terminals. 65 dB metal tape, connect a band
coëfficiënt 2) Perform recording with the signal en- pass filter between the deck
hanced by 20 dB. and the electronic voltmeter.
3) Erase a part of the recording.
Input (1 kHz , Tape deck
4) IVIeasurethe output difference between +20 dB) ^ (recording,
the erase part and non-erased part to erasing)
compare with an electronic voltmeter.
(1 kHz )
Band pass ^ Electronic
voltmeter
filter

12 DDRP With the deck set to the S T O P mode, in- I N P U T : L I N E IN

operation put " B 6 " code from a D C S and confirm 1 k H z , - 4 . 8 dBs
the R E C / D D R P L E D lights in green. T A P E : NORM
T h e n , changethe mode to the R E C / P L A Y
and confirm that the red L E D lights and
the output level of the L I N E O U T termi-
nals is —5.0 dB ± 2 dB regardless of setting
positions of the I N P U T volume and the
B A L A N C E volume controls.

(No. 4312) 19
O

[A] DECK
P.B.HEAD

I —I A n
 TD-W503 A/B/C/E/G/J/U
• Main P.C. Board Parts List

REF. PARTS NO. PARTS NAME REF. PARTS NO. PARTS NAME
CB301 Q F P 3 2 A J - 561ZM PP C A P A C I T O R C242 QETC1HM-474ZM E.CAPACITOR
CB302 Q C S l l H J - 101 C.CAPACITOR C243 QCSllHJ-471 C.CAPACITOR
CB303 Q C S l l H J - 561 C.CAPACITOR C244 QCY41HK-682 C.CAPACITOR
CB304 QCCllEM- 103 C.CAPACITOR C245 QCY41HK-822 C.CAPACITOR
CB305 Q F V 7 1 H J - 393ZM TF.CAPACITOR C246 QCCllEM-103 C.CAPACITOR
CB30Ó QCCllEM- 223 C.CAPACITOR C247 QCS32HJ-151ZV C.CAPACITOR
CB307 Q E T C I E M - 106ZM E.CAPACITOR C249 QETC1HM-105ZM E.CAPACITOR
CB401 Q F P 3 2 A J - 561ZM PP C A P A C I T O R C251 QCCllEM-333 C.CAPACITOR
CB402 Q C S l l H J --101 C.CAPACITOR C252 QCCllEM-104 C.CAPACITOR
CBA03 Q C S l l H J --561 C.CAPACITOR C253 QCCllEM-333 C.CAPACITOR
CB404 Q C C l l E M --103 C.CAPACITOR C254 QCC31EM-563ZV C.CAPACITOR
CBA05 Q F V 7 1 H J --393ZM TF.CAPACITOR C255 QCCllEM-153 C.CAPACITOR
CB406 Q C C l l E M - -223 C.CAPACITOR C701 QCFllHP-103 C.CAPACITOR
CB407 Q E T C I E M --106ZM E.CAPACITOR C706 QETC1HM-224ZM E.CAPACITOR
CB901 Q E T C I A M --476ZM E.CAPACITOR C801 QETC1AM-477ZM E.CAPACITOR
CB902 Q E T C I A M --476ZM E.CAPACITOR C802 QCFllHP-103 C.CAPACITOR
CB903 Q C S l l H J --100 C.CAPACITOR C803 QCFllHP-103 C.CAPACITOR
CB905 Q E T C I E M --106ZM E.CAPACITOR C806 QCFllHP-103 C.CAPACITOR
CF701 EF0-GC6004T5 C E R A LOCK C807 QCFllHP-103 C.CAPACITOR
CN701 V M C 0 1 6 6 - -004Z CONNECTOR C816 QCFllHP-103 C.CAPACITOR
CN702 V M C 0 1 6 6 - -004Z CONNECTOR C817 QCFllHP-103 C.CAPACITOR
CN703 V M C 0 1 6 6 - -004Z CONNECTOR C818 QETC1AM-476ZM E.CAPACITOR
CN704 V M C 0 1 0 7 - -006 SOCKET C821 QFP32AJ-a03ZM PP C A P A C I T O R
CN706 V M C 0 1 0 7 - -006 SOCKET C822 QETC1EM-476ZM E.CAPACITOR
CN709 V M C 0 1 0 7 - -007 SOCKET C823 QFV41HJ-223 TF.CAPACITOR
CN711 V M C 0 1 0 7 - -007 SOCKET C824 QCY41HK-102 C.CAPACITOR
CN8 VMC0107- -003 CONNECTOR C825 QCY41HK-102 C.CAPACITOR
CN801 Q M V 5 0 1 1 - -007 CONNECTOR C826 «CY41HK-102 C.CAPACITOR
CN802 Q M U 5 0 1 1 -- 0 0 3 CONNECTOR C827 QETC1HM-475ZM E.CAPACITOR
CN811 V M C 0 1 6 6 - -004Z CONNECTOR C828 QETC1CM-107ZM E.CAPACITOR
CN812 V M C 0 1 6 6 - -005Z CONNECTOR C829 QETC1AM-107ZM E.CAPACITOR
CN813 VMC0166- -005Z CONNECTOR C831 QETC1CM-336ZM E.CAPACITOR
CN815 VMC0166- - 0 0 4 Z CONNECTOR C832 QETC1EM-476ZM E.CAPACITOR
ClOl QCY41HK--102 C.CAPACITOR C841 QCY41HK-682 C.CAPACITOR
ClOU Q C S l l H J --151 C.CAPACITOR CS42 QCY41HK-102 C.CAPACITOR
C106 Q F V 4 1 H J -- 1 0 3 TF.CAPACITOR CS43 QFV71HJ-394ZM TF.CAPACITOR
C107 Q E T C I A M --107ZM E.CAPACITOR C844 QETC1HM-104ZI\ E.CAPACITOR
C108 Q E T C I H M --475ZM E.CAPACITOR C845 QCY41HK-681 C CAPACITOR
C109 QCY41HK-- 1 0 2 C.CAPACITOR C901 QCFllHP-103 C.CAPACITOR
Clll Q C S l l H J --471 C.CAPACITOR C902 QCFllHP-103 C.CAPACITOR
C l 12 Q C S l l H J --471 C.CAPACITOR C905 QETB1EM-228N E .CAPACITOR
C114 Q C S l l H J --151 C.CAPACITOR C906 QETB1EM-338N E.CAPACITOR
C116 Q F V 4 1 H J -- 1 0 3 TF.CAPACITOR C907 QETC1AM-107ZM E.CAPACITOR
C117 Q E T C I A M --107ZM E.CAPACITOR C908 QETC1EM-226ZM E.CAPACITOR
C118 Q E T C I H M --475ZM E.CAPACITOR C909 QETC1AM-107ZM E.CAPACITOR
C119 QCY41HK--102 C.CAPACITOR C 911 QETC1CM-107ZM E.CAPACITOR
C131 Q E T C I H M --105ZM E.CAPACITOR C912 QETC1AM-107ZM E.CAPACITOR
C141 Q C S l l H J --330 C.CAPACITOR C913 QETC1AM-107ZM E.CAPACITOR
C142 Q E T C I H M --474ZM E.CAPACITOR C914 QETB1CM-688N E.CAPACITOR
C143 Q C S l l H J --471 C.CAPACITOR C915 QETC1EM-476ZM E.CAPACITOR
C144 QCY41HK--682 C.CAPACITOR C916 QETB1CM-228N E.CAPACITOR
C145 QCY41HK--822 C.CAPACITOR C917 QETC1AM-107ZM E.CAPACITOR
C146 Q C C l l E M --103 C.CAPACITOR DB901 HSS104TJ S I DIODE
C147 Q C S 3 2 H J -- 1 5 1 Z V C.CAPACITOR DB902 HSS104TJ S I DIODE
C149 Q E T C I H M --105ZM E.CAPACITOR D701 HSS104TJ S I DIODE
C151 Q C C l l E M --333 C.CAPACITOR D702 HSS104TJ S I DIODE
C152 Q C C l l E M --104 C.CAPACITOR D703 HSS104TJ S I DIODE
C153 Q C C l l E M --333 C.CAPACITOR D704 HSS104TJ S I DIODE
C154 QCC31EM-- 5 6 3 Z V C.CAPACITOR D705 HSS104TJ S I DIODE
C155 Q C C l l E M --153 C.CAPACITOR D706 HSS104TJ S I DIODE
C201 Q C Y 4 1 H K --102 C.CAPACITOR D707 HSS104TJ S I DIODE
C204 Q C S l l H J --151 C.CAPACITOR D731 HSS104TJ S I DIODE
C206 Q F V 4 1 H J -- 1 0 3 TF.CAPACITOR D741 HSS104TJ S I DIODE
C207 Q E T C I A M --107ZM E.CAPACITOR D742 HSS104TJ S I DIODE
C208 Q E T C I H M --475ZM E.CAPACITOR D743 HSS104TJ S I DIODE
C209 Q C Y 4 1 H K --102 C.CAPACITOR D751 1SR35-100AT-93 S I DIODE
C211 Q C S l l H J --471 C.CAPACITOR D752 1SR35-100AT-93 S I DIODE
C212 Q C S l l H J --471 C.CAPACITOR D753 1SR35-100AT-93 S I DIODE
C214 Q C S l l H J --151 C.CAPACITOR D754 1SR35-100AT-93 S I DIODE
C216 Q F V 4 1 H J --103 TF.CAPACITOR D801 HSS104TJ S I DIODE
C217 Q E T C I A M --107ZM E.CAPACITOR D802 HSS104TJ S I DIODE
C218 Q E T C I H M --475ZM E.CAPACITOR D803 HSS104TJ S I DIODE
C219 Q C Y 4 1 H K --102 C.CAPACITOR D804 HSS104TJ S I DIODE
C231 Q E T C I H M --105ZM E.CAPACITOR D805 HSS104TJ S I DIODE
C241 Q C S l l H J - -330 C.CAPACITOR D813 HSS104TJ S I DIOD.E

(No. 4312) 27
TD-W503 A/ B/ C / E / G / J/ U

A REF, PART S NO. PARTS NAME A REF. PARTS NO. PARTS NAME
D814 HS S 1 0 4 T J SI D I OD E Q8 2 7 2 S A5 6 4 ( R, S ) T A T R A N S I S T OR
D9 0 1 1 SR3 5 - 1 0 0 AT - 9 3 SI D I OD E Q8 2 8 2 S C1 6 8 5 ( Rr S ) T A T R A N S I S T OR
& D9 0 2 1 SR3 5 - 1 0 0 AT - 9 3 SI D I OD E Q8 3 2 2 S C1 6 8 5 ( R, S ) T A T R A N S I S T OR
D9 0 3 1 SR3 5 - 1 0 0 AT - 9 3 SI D I OD E Q8 3 3 2 S C1 6 8 5 ( R, S ) T A T R A N S I S T OR
D9 0 4 1 SR3 5 - 1 0 0 AT - 9 3 SI D I OD E Q8 4 1 A A I F 4 M- T TR I / M
D9 0 5 MT Z 5 . 6 C T - 7 7 Z . D I OD E Q9 0 1 2 S B7 7 2 ( Q, P ) T R A N S I S T OR
D9 0 6 MT Z 1 2 A T - 7 7 Z . D I OD E 4\ Q9 0 2 2 S A5 6 4 ( R, S ) T A T R A N S I S T OR
F W8 V WS 1 0 3 - 0 8 B 3 4 K UL CP J U MP E R 'A Q9 0 3 2 S D8 8 2 ( Q , P ) T R A N S I S T OR
I CB9 1 UP C1 2 9 7 CA I C Q9 0 4 2 S C2 0 0 1 < L , K) - T T R A N S I S T OR
I C7 0 1 MB 8 8 5 1 5 B - 1 2 2 6 T I C Q9 8 1 A A 1 F 4 M- T TR I / M
I C8 0 1 AN6 5 5 7 F I C RB3 0 1 QR D 1 6 1 J - 2 7 4 C A R B ON R E S I S T OR
I C8 0 2 AN6 5 5 7 F I C RB3 0 2 QR D 1 6 1 J - 3 3 3 C A R B ONR E S I S T OR
I C8 0 3 BA1 5 2 1 8 N I C RB3 0 3 QR D 1 4 C J - l OOS X UNF . C. RE S . I . M
I C8 0 5 BU4 0 6 6 B I C RB4 0 1 QR D 1 6 1 J - 2 7 4 C A R B ON R E S I S T OR
I C8 0 6 L A2 0 0 0 S I c RB4 0 2 QR D 1 6 1 J - 3 3 3 C A R B ON R E S I S T OR
1 C8 0 8 BU4 0 6 6 B I C 'h R B 4 0 3 0, R D1 4 C J- l OOS X UNF . C. RE S . I . M
I C8 1 4 BU4 0 6 6 B I C RB9 0 1 QR D 1 6 1 J - 1 0 3 C A R B ON R E S I S T OR
I C8 5 1 MC 1 4 0 5 3 B C P I C RB9 0 2 QR D 1 6 1 J - 3 9 2 C A R B ON R E S I S T OR
I C9 0 1 AN7 8 N0 7 I .c RB9 0 3 QR D 1 6 1 J - 3 9 2 C A R B ON R E S I S T OR
J701 Q MS 3 5 3 3 - 0 0 1 J ACK R l Ol QR D 1 6 1 J - 1 0 4 C A R B ON R E S I S T OR
J801 E MN 0 0 T \ / - 4 0 2 A PI N J ACK R1 0 2 QR D 1 6 1 J - 1 8 2 C A R B ON R E S I S T OR
L B3 0 1 V QH 7 0 0 1 - 0 2 1 OS C C OI L ( B I A S ) R1 0 4 QR D 1 6 1 J - 1 0 5 C A R B ON R E S I S T OR
L B4 0 1 V QH 7 0 0 1 - 0 2 1 OS C C OI L ( B I A S ) R1 0 6 QR D 1 6 1 J - 3 9 4 C A R B ON R E S I S T OR
L102 V QP 0 0 0 1 - 5 6 2 S I N D U C T OR R1 0 7 QR D 1 6 1 J - 5 1 2 C A R B ON R E S I S T OR
L103 V QP 0 0 0 1 - 1 8 3 S I N D U C T OR R1 0 9 QR D 1 6 1 J - 6 8 2 C A R B ON R E S I S T OR
L202 V QP 0 0 0 1 - 5 6 2 S I N D U C T OR Rl l l QR D 1 6 1 J - 6 8 0 C A R B ON RÉ ^ S Ï S T ÖR
L203 V QP 0 0 0 1 - 1 8 3 S I N D U C T OR R1 1 2 QR D 1 6 1 J - 2 2 3 C A R B ON R E S I S T OR
L801 V QH 1 0 0 8 - 0 3 1 OS C C OI L C B I A S ) R1 1 3 QR D 1 6 1 J - 4 7 2 C A R B ON R E S I S T OR
Ql Ol 2 S C a 8 4 5 ( E , U) - T T R A N S I S T OR R1 1 4 QR D 1 6 1 J - 3 3 2 C A R B ON R E S I S T OR
Q1 0 2 2 SC1 6 8 5 ( R/ S) T A T R A N S I S T OR R1 2 3 QR D 1 6 1 J - 1 0 4 C A R B ON R E S I S T OR
Q1 0 3 2 S K 3 0 1 ( Q, R ) T A F ET R1 2 4 QR D 1 6 1 J - 1 0 5 C A R B ON R E S I S T OR
Q1 0 5 A A 1 F 4 M- T TR I / M R1 2 6 QR D 1 6 1 J - 3 9 4 C A R B ON R E S I S T OR
Ql l l 2 SC2 0 0 1 ( L ^ K) - T T R A N S I S T OR R1 2 7 QR D 1 6 1 J - 3 3 2 C A R B ON R E S I S T OR
Q1 1 2 A A 1 F 4 M- T TR I / M R1 2 8 QR D 1 6 1 J - 2 2 2 C A R B ON R E S I S T OR
Q1 1 5 2 SC1 6 8 5 ( R, S) T A T R A N S I S T OR R1 2 9 QR D 1 6 1 J - 3 9 2 C A R B ON R E S I S T OR
Q1 1 6 2 SC1 6 8 5 ( R/ S) T A T R A N S I S T OR R1 3 0 QR D 1 6 1 J - 3 3 2 C A R B ON R E S I S T OR
Q1 2 1 2 SC2 0 0 1 ( L / K) - T T R A N S I S T OR R1 3 1 QR D 1 6 1 J - 6 8 0 C A R B ON R E S I S T OR
Q2 0 1 2 S C1 8 4 5 ( E , U) - T T R A N S I S T OR R1 3 2 QR D 1 6 1 J - 2 2 3 C A R B ON R E S I S T OR
Q2 0 2 2 S C1 6 8 5 ( Rr S ) T A T R A N S I S T OR R1 3 3 QR D 1 6 1 J - 2 2 2 C A R B ON R E S I S T OR
Q2 0 3 2 S K 3 0 1 ( Q, R ) T A F ET R1 3 4 QR D 1 6 1 J - 3 3 2 C A R B ON R E S I S T OR
Q2 0 5 A A 1 F 4 M- T TR I / M R1 4 8 QR D 1 6 1 J - 1 2 3 C A R B ON R E S I S T OR
Q2 1 1 2 S C2 0 0 1 ( L , K) - T T R A N S I S T OR R1 5 1 QR D 1 6 1 J - 2 7 3 C A R B ON R E S I S T OR
Q2 1 2 A A 1 F 4 M- T TR I / M R1 5 2 QR D 1 6 1 J - 2 2 2 C A R B ON R E S I S T OR
Q2 1 5 2 SC1 6 8 5 ( Rr S) T A T R A N S I S T OR R1 5 3 QR D 1 6 1 J - 2 2 2 C A R B ON R E S I S T OR
Q2 1 6 2 SC1 6 8 5 ( R, S) T A T R A N S I S T OR Ra 5 4 QR D 1 6 1 J - 2 2 2 C A R B ON R E S I S T OR
Q2 2 1 2 SC2 0 0 1 ( L / K) - T T R A N S I S T OR R1 5 7 QR D 1 6 1 J - 8 2 2 C A R B ON R E S I S T OR
Q3 0 1 2 SC1 6 8 5 ( R, S) T A T R A N S I S T OR R1 6 5 QR D 1 6 1 J - 3 3 2 C A R B ON R E S I S T OR
Q4 0 1 2 S C1 6 8 5 ( R^ S ) T A T R A N S I S T OR R1 6 6 QR D 1 6 1 J - 1 0 2 C A R B ON R E S I S T OR
Q7 0 4 A N 1 F 4 M- T TR I / M R1 6 7 QR D 1 6 1 J - 1 5 3 C A R B ON R E S I S T OR
Q7 0 6 2 SA5 6 4 ( R, S) T A T R A N S I S T OR R1 6 8 QR D 1 6 1 J - 4 7 2 C A R B ON R E S I S T OR
Q7 0 7 2 SC1 6 8 5 ( Rr S) T A T R A N S I S T OR R1 6 9 QR D 1 6 1 J - 3 3 1 C A R B ON R E S I S T OE
Q7 0 8 R1 7 0 QR D 1 6 1 J - 5 6 1 C A R B ON R E S I S T OR
2 SC1 6 8 5 ( R, S) T A T R A N S I S T OR
Q7 0 9 2 SC1 6 8 5 ( Ry S) T A T R A N S I S T OR R1 7 1 QR D 1 6 1 J - 2 2 4 C A R B ON R E S I S T OR
Q7 2 1 2 SA5 6 4 ( R, S) T A T R A N S I S T OR R1 7 3 QR D 1 6 1 J - 1 2 3 C A R B ON R E S I S T OR
Q7 2 2 2 S A5 6 4 ( Rr S ) T A R1 7 4 QR D 1 6 1 J - 4 7 2 C A R B ON R E S I S T OR
T R A N S I S T OR
Q7 2 3 2 SA5 6 4 < R, S) T A R1 7 6 QR D 1 6 1 J - 1 0 3 C A R B ON R E S I S T OR
T R A N S I S T OR
Q7 2 4 2 SA5 6 4 ( R, S) T A R1 7 7 QR D 1 6 1 J - 1 0 5 C A R B ON R E S I S T OR
T R A N S I S T OR
Q7 2 5 A A 1 F 4 M- T R1 8 1 QR D 1 6 1 J - 1 5 2 C A R B ON R E S I S T OR
TR I / M
Q7 2 6 2 SC1 6 8 5 ( R, S) T A R1 8 2 QR D 1 6 1 J - 6 8 1 C A R B ON R E S I S T OR
T R A N S I S T OR
Q7 3 1 2 SC2 0 0 1 ( L , K) - T R1 8 3 QR D 1 6 1 J - 4 7 2 C A R B ON R E S I S T OR
T R A N S I S T OR
Q7 3 2 R1 8 4 QR D 1 6 1 J - 1 5 2 C A R B ON R E S I S T OR
2 SC2 0 0 1 ( L , K) - T T R A N S I S T OR
Q7 3 3 2 S C2 0 0 1 < L ^ K) - T T R A N S I S T OR R1 8 6 QR D 1 6 1 J - 1 2 2 C A R B ON R E S I S T OR
Q7 3 4 2 S C2 0 0 1 ( L , K) - T T R A N S I S T OR R1 8 8 QR D 1 6 1 J - 2 2 2 C A R B ON R E S I S T OR
Q7 3 5 2 SC1 6 8 5 ( R, S) T A R1 9 5 QR D 1 6 1 J - 4 7 3 C A R B ON R E S I S T OR
T R A N S I S T OR
Q7 3 6 2 S C1 6 8 5 ( R^ S ) T A T R A N S I S T OR R2 0 1 QR D 1 6 1 J - 1 0 4 C A R B ON R E S I S T OR
Q7 3 7 2 SC1 6 8 5 ( R, S) T A R2 0 2 QR D 1 6 1 J - 1 8 2 C A R B ON R E S I S T OR
T R A N S I S T OR
Q7 3 8 2 S C1 6 8 5 CR, S ) T A T R A N S I S T OR R2 0 4 QR D 1 6 1 J - 1 0 5 C A R B ON R E S I S T OR
Q8 0 1 2 S C1 8 4 5 ( E , U) - T T R A N S I S T OR R2 0 6 QR D 1 6 1 J - 3 9 4 C A R B ON R E S I S T OR
Q8 0 2 2 SA9 9 2 ( F , E, U) - T T R A N S I S T OR R2 0 7 QR D 1 6 1 J - 5 1 2 C A R B ON R E S I S T OR
Q8 0 3 A A 1 F 4 M- T TR I / M R2 0 9 QR D 1 6 1 J - 6 8 2 C A R B ON R E S I S T OR
QS l l A N 1 F 4 M- T TR I / M R2 1 1 QR D 1 6 1 J - 6 8 0 C A R B ON R E S I S T OR
Q8 1 2 2 S A5 6 4 ( R, S ) T A R2 1 2 QR D 1 6 1 J - 2 2 3 C A R B ON R E S I S T OR
T R A N S I S T OR
Q8 2 1 2 S C2 0 0 1 ( L ^ K> - T T R A N S I S T OR R2 1 3 QR D 1 6 1 J - 4 7 2 C A R B ON R E S I S T OR
QS 2 2 2 S C2 0 0 1 ( L ^ K) - T T R A N S I S T OR R2 1 4 QR D 1 6 1 J - 3 3 2 C A R B ON R E S I S T OR
Q9 2 6 2 S C2 0 0 1 ( L , K) - T T R A N S I S T OR R2 2 3 QR D l ó l J - 1 0 4 C A R B ON R E S I S T OR

2 8 (N o. 4 3 1 2 )
• Enclosure Component Parts List

BLOCK NO, [
PARTS NO. PARTS NAME R E M A R Kzyxwvutsrqponmlkjihgfedcba
S Q/ry

ZCTDW503J-FBK FRONT PANEL ASS'Y TD-W503C/J SERVICE 1

ZCTDW503K-FBK FRONT PANEL ASS'Y OTHER A R E A PARTS 1
ZCTDW503K-CH CASSETTE HOLDER ASS'Y 1
ZCTDW503K-CLBK CASSETTE LID ASS'Y 1

1 VJ C1 8 4 7 - 0 1 1 UL F R ON T P ANE L C/ J 1
VJ C 1 8 4 7 - 0 1 2 F R ON T P ANE L A/ B/ E / G/ U 1
2 VJ D 4 0 2 4 - 0 0 1 R E F L E C T I ON P L AT 2
3 VJ D 5 2 1 0 - 0 0 7 L ED P L AT E 1
4 VXP4 3 4 9 - 0 0 A P US H B U T T ON F OR E J E CT 2
5 V K W3 0 0 1 - 0 6 3 C O MP . S P R I N G P . B U T T ON AS S ' Y 2
6 E7 2 9 6 8 - 0 0 1 J VC MA R K 1
7 V KL 6 7 5 1 - 0 0 1 ME C H A BRACKE T 2
8 VXP3 3 2 0 - 0 0 4 ME C H A B U T T ON 1

9 VXP3 3 2 0 - 0 0 5 ME C H A B U T T ON l
10 S DS F 2 6 0 8 Z S CRE W ME C H A B U T T ON 4
11 VXP4 8 7 8 - 0 0 2 DUBBI NG B U T T ON 1
12 S DS F 2 6 0 8 Z S CRE W DUBBI NG B U T T ON 2
13 SSSP3 0 0 6 N S CRE W ME C H A BRACKE T 4
14 VJ T2 2 1 2 - 0 0 1 C . H OL D E R AS S ' Y DE CK A 1
15 VJ T2 2 1 2 - 0 0 2 C . H OL D E R AS S ' Y DE CK B 1
16 V KY 4 1 8 0 - 0 0 1 CAS S E T T E S P RI NG 4
17 y Y H5 6 0 1 - 0 0 2 GE A R 2
18 V Y H5 6 0 2 - 0 0 2 D A MP H OL D E R 2
19 S BS F 3 0 0 8 7 . S CRE W D U MP H OL D E R 2
20 V KY 4 5 6 3 - 0 0 2 H S P RI NG DE CK A 1
21 V KY 4 5 6 3 - 0 0 1 H S P RI NG DE CK B 1
22 S DS T 2 6 0 4 Z S CRE W H OL D E R S P RI NG 2
23 V KL 6 6 3 1 - 0 0 1 P BRACKE T 1
24 L P S P 3 0 0 ÓZ S CRE W P OWE R S WI T C H 1
25 y . KZ 4 1 5 0 - 0 0 1 S P E CI AL NUT H. P . J ACK 1
26 SSSF3 0 1 0 Z S CRE W P OWE R BKT 3
27 S8 SF3 0 0 8 Z S CRE W ME C H A 8
28 V KL 6 6 3 2 - 0 0 1 C BRAKE T -1
X

29 V KC5 1 9 1 - 0 0 1 T T AP E C OU N T E R 1
V KB3 0 0 0 - 1 3 6 -1
30 BE L T X
1
T
S BS F 2 6 0 4 Z S CRE W C OU N T E R BRACKE T 2
32 SSSF3 0 1 0 Z S CzyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
REW C OU N T E R BRACKE T 3
33 S BS F 2 6 0 8 Z S CRE W ME C H A P CB 4
34 VJ C 2 3 6 8 - 0 0 9 RE A R P ANE L A/ B/ C/ E/ G/ J 1
V J C2 3 6 8 - 0 1 0 RE A R P ANE L T D - W5 0 3 Ü 1
35 V KL 2 3 8 8 - 0 0 2 S I DE CHAS S I S 2
36 S DS T 3 0 0 6 M S CRE W RE AR+ CHAS S I S 2
37 S DS T 3 0 0 6 M S CRE W RE A R+ T RANS 4
38 S DS F 3 0 0 8 M S CRE W DCS J ACK 1
39 S DS F 3 0 0 8 M S CRE W PI N J ACK 1
40 S DS F 3 0 0 8 M S CRE W 2
41 S DS T 3 0 0 6 Z S CRE W CHAS S I S + P CB 1
42 WB S 3 0 0 0 N WA S H E R 1
43 V KL 6 6 2 6 - 0 0 2 AMP BRACKE T CA) 1
44 S D S T 3 0 0 ÓZ S CRE W 1
45 V KL 6 6 2 9 ~ 0 0 2 E L E V E R( L ) 1
46 V KL 6 6 3 0 - 0 0 2 E L E V E R( R) E J E CT L EVER 1
4 7 V K W3 0 0 2 - 2 6 3 T E N S I ON S P RI NG E J E CT L EVER 2
48 SSST2 0 0 6 Z S CRE W DE CK A 2
49 V KH3 0 0 1 - 0 8 4 F L A N GE C OL L A R DE CK A 2
50 V KL 6 6 8 3 - 0 0 4 SP. H OL D E R R 1
51 V KL 6 6 8 3 - 0 0 5 SP. H OL D E R L 1
53 V KH3 0 0 1 - 0 8 8 F L A N GE C OL L A R 2
5 4 SSST2 0 0 6 Z S CRE W E J E CT L EVER 2
'h 55 Q MP 1 2 0 0 - 2 0 0 P OWE R C OR D T D - W5 0 3 C / J 1
Q MP 2 5 6 0 - 2 0 0 P OWE R C OR D T D - W5 0 3 A 1
h Q MP 3 9 0 0 - 2 0 0 P OWE R C OR D T D - W5 0 3 E / G 1
 B L O C K NO. I I i i I I
A R E F. PARTS NO. PARTS NAME REMARKS QTY
'i\ QMP7380-200 POWER CORD TD-W503U 1
'h QMP9017-008BS POWER CORD TD-W503B ±

'ïi 56 QHS3876-162 S.R-BUSHING TD-W503A/C/E/G/J / 1

i\ QHS3876-162BS S.R.BUSHING TD-W503B 1
57 VKS5011-001 V O L T A G E CONTACT TD-W503U 1
58 SDSF3008M SCREW TD-W503U 2
59 VYSR105-015 SPACER MIC P.W.B 1
60 VXP4879-003 PUSH BUTTON POWER S W I T C H 1
61 VXL4335-002 KNOB I N P U T VOLUME 1
62 VJ C 1 6 9 5 - 0 0 4 BOTTOM COVER 1
63 E47227-020 FOOT 4
64 SDST3008Z SCREW FOOT 4
65 SDST3006Z SCREW BOTTOM 5
67 VJ C 1 8 2 1 - 0 0 2 TOP COVER 1
68 SDST3006M SCREW TOP+REAR 2
69 VKZ3001-004 S P E C I A L SCREW TOP+CHASSIS 4
70 VJT2213-022 CASSETTE L I D DECK A 1
71 VJ T 2 2 1 3 - 0 2 3 CASSETTE L I D DECK B 1
72 VJ K 3 4 6 4 - 0 0 3 FINDER 1
73 VYN2265-002PA NAME P L A T E TD-W503A/B 1
VYN2265-004PA NAME P L A T E TD-W503C 1
VYN2265-005PA NAME P L A T E TD-W503E 1
VYN2265-006PA NAME P L A T E TD-W503J 1
VYN2265-007PA NAME P L A T E TD-W503U 1
VYN2265-008PA NAME P L A T E TD-W503G 1
74 VTP52A3-011F POWER TRANS T O l TD-W503C/J 1
'K VTP52G3-011F POWER TRANS T O l TD-W503U 1
VTP52M3-011F POWER TRANS T O l TD-W503A/E/G
VTP52M3-011FBS POWER TRANS T O l TD-W503B
75 QMF51A2-RS0 FUSE TD-W503A/E/G/U 2
*\ QMF51E2-R80BS FUSE TD-W503B
76 QMF51A2-R20 FUSE FOl TD-W503Ü 1
77 QZL1002-003 WARNING L A B E L TD-W503B
78 TJL000420-01 CAUTION L A B E L TD-W503B 1

80 VND4113-001 G . C A U T I O N CARD TD-W503B 1

81 V1MD4205-004 CAUTION L A B E L TD-W503B 1
83 V04062-001 C O N T I .PLUG TD-W503U 1
84 VND4003-032 FUSE L A B E L TD-W503U 1
85 SSST3006Z SCREW F.PANEL+CHASSIS 4
86 SDST2606Z SCREW M.BKT+SP HOLDER 2
87 VYSR102-024 SPACER MECHA(ArB) 2
88 VND4037-002 F MARK TD-W503G 1
89 SDST2606Z SCREW MODE S W I T C H 2
90 VKZ4150-001 S P E C I A L NUT 2
91 VXL4336-001 KNOB BALANCE 2
92 SDST3006Z SCREW 1
SDST3006Z SCREW HP/MODE SW PCB 1
95 SDST2606Z SCREW I N P U T PWB+BKT 1
96 VYSS1R6-001 SPACER AMP B K T 1
97 SDST2004Z SCREW 2
98 WBS2Ó00N WASH ER
WBS2600N WASHER 1
99 VKZ4001-111 W I R E HOLDER 2
100 VKW4901-001 KNOB S P R I N G 1
102 VMZ0034-001 TAB 2

103 VMZ0087-001Z FUSE C L I P TD-W503A/B/E/G/U 4

105 DPSP3008Z SCREW IC901,IC902,Q901 3
106 VMH4011-002 HEAT S I N K IC901,IC902/Q901 1
107 T44362-001 CSA L A B E L 1
 TD-W503 A/B/C/E/G/J/U

• D E C K [A] : Mechanism Component Parts List

A REF. P A R T S NO. PARTS NAME REMARKS QTY

1 188001501T CHASSIS ASS'Y 1
2 18800102T PACK S P R I N G 1
3 91780000T SCREW M2 X 3 1
5 18650260T CLAMP S P R I N G 1
6 18800219T PANEL COLLAR 1
7 18650228T COLLAR 2
8 186502306T H.BASE ASS'Y 1
9 18650234T R E L A Y BOARD 1
10 99991817T SCREW 2
11 18650961T SPACER 1
12 18650249T W I R E CLAMP 1
13 18800201T HEAD P A N E L ( A ) 1
14 188002501T H.PANEL(B)ASS'Y 1
15 18800221T RC S P R I N G 1
16 18800205T PANEL SPRING 1
17 18800206T CHP L E V E R 1
18 18800405T P.R.SPRING 1
19 62040320T HEAD HD422515 1
20 90780000T A S S ' Y SCREW M2 X 5 1
21 95470000T M I N I SCREW Ml.7 X 3 2
22 99992020T SCREW M2 X 5 1
23 18800216T PANEL S P . P L A T E 1
24 99991816T SCREW M2 X 5 1
25 91170000T SCREW M2 X 5 1
26 18800708T RF B E L T 1
27 188007301T RF C L U T C H A S S ' Y 1
28 18650257T SHIELD PLATE 1
31 188005301T T-UP R E E L A S S ' Y 1
32 188005302T S U P P L Y R E E L ASSY 1
33 188005501T REEL BASE ASS'Y 1
34 18800508T FF GEAR 1
36 18800517T TENSION SPRING 1
38 18800522T BACK T . S P R I N G 2
39 91800000T SCREW M2 X 4 2
40 94210000T P.WASHER 1.2 X 3 X 0 . 2 5 1
41 99997004T WASHER 2.1 X 5 X 0.4
42 99997003T HL WASHER 1.4 X 3.2 X 0 . 4 2
43 18800515T RF T R I G G E R ARM 1
46 18211266T MOTOR R U B B E R 3
47 18511418T C O L L A R SCREW 3
48 18800939T MAIN B E L T 1
49 18800940T MOTOR P U L L E Y 1
50 18800913T FM B R A C K E T 1
51 60050342T MOTOR MMI-6H2LWK 1
52 18201302T FL.THRUST PLATE 2
53 18201310T THRUST SPRING 2
54 90770000T A S S ' Y SCREW M2 X 4 3
56 18800106T SPRING 1
57 18802115T M GEAR 1
58 18802116T RF CAM GEAR 1
59 18802103T M T R I G G E R ARM 1
60 18802105T PLUNGER 2
61 18802106T P L U N G E R HOLDER 2
62 1830215Ö1T CH S . L E V E R A S S Y 1
63 18802108T SPRING 1

(No. 4312) 33
TD-W 503 A/ B/ C/ E/ G/ J/ U

A Parts are sa fe ty assurance pa rts.

W h e n re pla cing those pa rts, ma ke sure to use the specified one .

A REF. PARTS NO. PARTS NAME REMARKS QTY

64 188021503T P K.LEVER ASS'Y 1
65 18802111T SPRING 1
66 18802121T SOLENOID 2.0 2
67 95020000T E .RING 1
68 99997006T WASHER 1
69 99997004T WASHER 2
70 18801301T E STOPPER A ( F ) 1
71 18801302T E STOPPER B ( F ) 1
74 18805302T SW P R O T E C T O R 1
75 99992020T SCREW M2 X 5 1
76 99991404T S T A P P I N G SCREW M2 X 6 1
77 18801309T E STOPP. SPRING 1
78 18801305T COLLAR 1
79 188005502T T GEAR ARM A S S Y 1
80 18800536T T GEAR 2
81 18800518T SPRING 1
82 94210000T P.WASHER 1.2 X 3 X 0.25 2
83 188005503T T G. ARM(R)ASSY 1
84 18800519T SPRING 1
88 188004309T P.R.ARM F ASS'Y 1
89 18800403T P ARM F S P R I N G 1
90 188004310T P.R.ARM R ASS'Y 1
91 18800404T P ARM R S P R I N G 1
93 18800903T FL GEAR ( F ) 1
94 18800904T FL GEAR ( R ) 1
95 18800916T FLYWHEEL(F)ASSY 1
96 18800908T FL M E T A L A S S ' Y FORWARD 1
97 91820000T SCREW M2 X 6 2
98 98570000T N Y L O N WASHER 2.1 X 3.5 X 0.5 1
99 99996009T WASHER 2.3 X 3.8 X 0.5 1
100 18800917T FLYWHEEL(R)ASSY 1
101 18800921T FL M E T A L A S S ' Y REVERSE 1
102 98580000T NYLON WASHER 1.8 X 3 . 5 X 0.5 1
103 99996008T WASHER 2.1 X 3.5 X 0.5 1
104 91800000T SCREW M2 X 4 2
108 18805313T PC BOARD 1
109 640101173T LEAF SWITCH MTS-10250MVJ0 2
110 640101174T L E A F SWITCH MSW-1699CZ 1
111 640101175T L E A F SWITCH MSW-17940MVD0 1
112 DN6851A HALL IC 1
113 18805303T IC PROTECTOR 1
114 68150207T CONNECTOR 1
115 68040505T RESISTER 2 . 2K0HM 1
116 68040506T RESISTER 5600HM 1

34 (No. 4312)
 TD-W503 A/B/C/E/G/J/U

• D E C K \B\ Mechanism Component Parts List

REF. P ART S N O. P ART S N AME REMARKS QTY

1 188001501T CHASSIS ASS'Y 1

2 18800102T PACK S P R I N G 1
3 91780000T SCREW M2 X 3 (SPECIAL) 1
5 18650260T CLAMP S P R I N G 1
6 18800219T PANEL COLLAR 1
7 18650228T COLLAR 2
8 186502306T H.BASE A S S ' Y 1
9 18805332T R E L A Y BOARD 1
10 99991817T SCREW 2
11 18650961T SPACER 1
12 18650249T W I R E CLAMP 1
13 18800201T HEAD P A N E L ( A ) 1
14 188002501T H.PANEL( B) ASS ' Y 1
15 1880D221T RC S P R I N G 1
16 18800205T PANEL SPRING 1
17 1880020ÓT CHP L E V E R 1
18 18800405T P.ROLL.SPRING 1
19 62040606T HEAD HD425569 1
20 90780000T A S S ' Y SCREW M2 X 5 1
21 95470000T M I N I SCREW Ml.7 X 3 2
22 99992020T SCREW M2 X 5 1
23 18800216T PANEL SPRING PLATE 1

24 99991816T SCREW M2 X 5 1
25 91170000T SCREW M2 X 5 1
26 18800708T RF B E L T 1
27 188007301T RF C L U T C H A S S ' Y 1
28 18Ó50257T SHIELD PLATE 1
31 188005301T T-UP R E E L A S S ' Y 1
32 188005302T S U P P L Y R E E L ASSY 1
33 188005501T R E E L BASE ASS'Y 1
34 18800508T F F GEAR 1
36 18800517T TENSION SPRING 1
38 18800522T BACK T . S P R I N G 2
39 91800000T SCREW 2
40 94210000T P.WASHER 1.2 X 3 X 0.25 1
41 99997004T WASHER 2.1 X 5 X 0.4 1
42 99997003T HL WASHER 1.4 X 3.2 X 0.4 2
43 18800515T RF T R I G G E R ARM 1
46 18211266T MOTOR R U B B E R 3
47 18511418T C O L L A R SCREW 3
43 18800939T MA I N B E L T 1
49 18800940T MOTOR P U L L E Y 1
50 18800913T FM B R A C K E T 1
51 60050342T MOTOR MMI-6H2LWK 1
52 18201302T FL.THRUST PLATE 2
53 18201310T THRUST S P R I N G 2
54 90770000T A S S ' Y SCREW M2 X 4 3
56 1880010ÓT SPRING 1
57 18802115T M GEAR 1
58 18802116T RF CAM GEAR 1
59 18802103T M T R I G G E R ARM 1
60 18802105T PLUNGER 2
61 18802106T P L U N G E R HOLDER 2
62 188021501T CH S . L E V E R A S S Y 1

(No. 4312) 35
TD-W 503 A/ B/ C/ E/ G/ J/ U

As. Parts are safety assurance parts .

When replacing those parts, make sure to use the specified one.

R E F, PARTS NO. PARTS NAME REMARKS QTY

63 18802108T SPRING 1
64 188021503T P K.LEVER ASS'Y 1
65 18802111T SPRING 1
66 18802121T SOLENOID 2
67 95020000T E.RING 2.0 1
68 99997006T WASHER 1.55 X 3.5 X 0.5 1
69 99997004T WASHER 2.1 X 5 X 0.4 2
72 18801306T E STOPPER A (R) 1
73 18801307T E STOPPER B (R) 1
74 18805302T SW P R O T E C T O R 1
76 99991404T S T A P P I N G SCREW M2 X 6 GUIDE 1
77 18801309T E STOPP. SPRING 1
78 18801305T COLLAR 1
79 1880O5502T T GEAR ARM A S S Y 1
80 18800536T T GEAR 2
81 18800518T SPRING 1
82 94210000T P .WASHER 1.2 X 3 X 0.25 2
83 188005503T T G. ARM(R)ASSY 1
84 18800519T SPRING 1
88 188004309T P . R . A R M ( F ) ASY 1
89 18800403T P ARM F S P R I N G 1
90 188004310T P.ROLL A. (R)ASY 1
91 18800404T P ARM R S P R I N G 1
93 18800903T FL GEAR ( F ) 1
94 18800904T FL GEAR ( R ) 1
95 18800916T FLYWHEEL (F)ASY 1
96 18800908T FL M E T A L A S S ' Y 1
97 91820000T SCREW M2 X 6 2
98 98570000T NYLON WASHER 2.1 X 3.5 X 0.5 1
99 9999Ó009T WASHER 2.3 X 3.8 K 0.5 1
100 18800917T FLYWHEEL(R)ASY. 1
101 1S800921T FL M E T A L A S S ' Y 1
102 98580000T NYLON WASHER 1.8 X 3 . 5 X 0.5 1
103 99996008T WASHER 2.1 X 3.5 X 0.5 1
104 91800000T SCREW M2 X 4 3
108 18805313T PC BOARD 1
109 640101173T LEAF SWITCH MTS- 10250MVJO 5
110 640101174T LEAF SWITCH MSW- 1 6 9 9 C Z 1
111 640101175T LEAF SWITCH MSW- 1 7 9 4 0 M V D 0 1
112 DNÓ851A HALL IC 1
113 18805303T IC PROTECTOR 1
114 68150207T CONNECTOR T X L - P13M1 1
115 68040505T C RESISTOR 1
116 68040506T C RESISTOR 1

36(No.4312)
 TD-W503 A/B/c /E /G/j/u

Packing lllustration and Parts List

15]zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA

All-AU .AI?)

( A4 . A1 0
A1 5 .A1 6 )

Packing Parts List A Parts are safety assurance p art s .

W h e n r epl aci n g those p a r t s , nnake sure t o use t h e specified o n e .

A R e f. N o. P a rts N o . P a rts N a m e R e ma rks Q'ty

PI VPC2265-002 Carton 1
P2 VPH2369-001 Cushion (L) 1
P3 VPH2370-001 C u s h i o n (R) 1
P4 VPE3005-026 P o l y Bag for Unit 1
P5 TKS000501-08 Sheet for U n i t 1
P6-1 VND3044-001 Serial T i c k e t ( W h i t e ) TD-W503A 1
P6-2 VND3044-001 Serial T i c k e t ( W h i t e ) TD-W503U 1
P6-3 VND3044-002 Serial T i c k e t (Orange) TD-W503J 2
P6-4 VND3044-003 Serial T i c k e t (Blue) TD-W503E 1
P6-5 VND3044004 Serial T i c k e t (Green) TD-W503B 1
P6-6 VND3044-005 Serial T i c k e t ( R e d ) TD-W503G 1
P6-7 VND3044-006 Serial T i c k e t TD-W503C 2
P7 VPE3005-007 P o l y Bag for Instruction Bock 1
P8 Q04141H Wire C l a m p 1
P9 E66416-003 Envelope TD-W503J/U 1
P10 VND4909-001 V o l t a g e Label TD-W503U 1
Pil VND3029-G28 Bar C o r d Label TD-W503B 2

( N o . 4 3 1 2) 37
TD-W503 A/B/C/E/G/J/U

Ï6l Accessories A Parts are safety assurance parts.

When replacing those parts, make sure to use the specified one.

A Ref.No. Parts No. Parts Name Remarks Q'ty

Al BT20025K Warranty Card TD-W503C 1

A2 BT20029C Warranty Card TD-W503A 1
A3 BT20044F Safety Guide TD-W503J 1
A4 BT20047D Warranty Card TD-W503J/U 1
A5 BT20060 Warranty Card TD-W503B 1
A6 BT20064A Warranty Card TD-W503G 1
A7 BT20066A Warranty Card TD-W503B/G 1
A8 BT20071A S V C Centre List TD-W503C 1
A9 BT20119 Warranty Card TD-W503A 1
AIO BT20108 Warranty Card TD-W503J/U 1
A11 EWP805-001E Remote Wire TD-W503A 1
A12 E43486-340A Safety Instruction Sheet TD-W503B 1
A13 TCP3304 Audio Tape Pannphiet 1
A14 VIV1P0039-00D Pin Cord 1
VNC2200-019 Copyright Law TD-W503A/B/D/E/U 1
A15 VNC5311-203 Caution Card TD-W503U 1
Al 6 VNC5311-204 Caution Card TD-W503U 1
A17 VNN2265-661 Instruction Book 1

JVC
VICTOR COMPANY OF JAPAN, LIMITED.
AUDIO P R O D U C T S DIVISION MAEBASHI PLANT 1 0 - 1 , 1-chome, Ohwatari-cho, Maebashi-city 3 7 1 , Japan

# ~Printed in Japan
H0201-S-