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0% found this document useful (0 votes)
40 views56 pagesSanyo Betacord 4500
Sanyo Betacord Betamax Player - 4500
Uploaded by
rbptfc2r47Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF or read online on Scribd
/ 56
SERVICE MANUAL
@ SANYO
COLOR VIDEO
CASSETTE RECORDER
FEATURES CAUTION
Poca
Pertti
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DONOT REMOVE
COVER (OR BACK. NO USER-SERVICEAGLE PARTS INSIDE. REFER SERV.
ICING TO QUALIFIED SERVICE PERSONNEL.
THIS SYMBOL INDICATES THAT DANGEROUS
VOLTAGE CONSTITUTING A RISK OF ELECTRIC
SHOCK 1S PRESENT WITHIN THIS UNIT.
‘THIS SYMBOL INDICATES THAT THERE ARE IM
PORTANT OPERATING AND MAINTENANCE IN:
STRUCTION IN THE LITERATURE ACCOMPANY.
ING THIS UNIT.
SAFETY PRECAUTIONS
LEAKAGE CURRENT CHECK | REAGINE SHOULD WoT EKCEED DA]
lg the AC lie cord iret ina 120V AC out (de
hot ase Solaon trantomerforthischech).Ust mAC | ying caggerTE ae wouTmeren
(5000 ahi per ot
Good ent round
1) sucha ot ie,
“alkmeter, having S00D ohne er volt or more sonst
Connect 100 ohm 10. wat ceitor,paaeled by 3 | -—PECORDER
On18 mie SDV AC capaci Deneen a kroun good earth
round water, canst, ee) ane all exposed
Darts of he cabinet Toners, Randle bracket, ea
bint, sawed, mel oveays, canst,
Harré the AC voige sro the 1500 chm resistor. The
fart mua be conducted withthe AC svtch on and then
‘epeited wih the AC ete off The AC wotape iat
bythe meter may not event Ov. rai exceeding
15 volt Indetr thot» dangerous potential exist, the
fault ft be leat an eared
Repeat te sbove tt with the VOR pone ploy revere
EVER HETURN A VCR TO THE CUSTOMER WITH
(QUT-TAKING NECESSARY CORRECTIVE ACTION,
9)
ACOUTLET _O.15m TSOV AC
Testa exposed meta
Voli Hookup for Leakage Carre Chock
PRODUCT SAFETY NOTICE
‘rods sty shuld be consled when a componant placemat ie maven my ea ofa VOR. Components dat
‘0 bythe symbol inthe parts its the schematic ian designate comgonets in which sey ean bea sp
Signitcane tis patty recommended tht only pare designated on the par ist In this manual Be used for eae
‘nent replacement designated by the yb: No dation from resins, tage or voltage atigs may ba mcf
taplsmenitemedegotd by the symbol TABLE OF CONTENTS
Poe
1. CABINET DISASSEMBLY fl
2, CIRCUIT BOARD DISASSEMBLY
1. CIRCUIT BOARD LOCATIONS 2
2, REMOVAL OF THE MAIN CIRCUIT BOARD, ans
3. CIRCUIT ADJUSTMENT
1. PREPARATIONS FOR ARISTIENT. o~9
2. PONER SUPPLY CIRCUIT CHECKS. 2
8. SYSTEM CONTROL CIRCUIT CHECKS AND ADJUSTIENT. 0
44 SERVO CIRCUIT ADWSTHENTS or
5. VIDEO CIRCUIT ADJUSTMENTS. 15-21
6. AUDIO CIRCUIT ADJUSTMENTS 2-2
17. TIMER CIRCUIT CHECKS 2
TUNER CIRCUIT ADJUSTMENTS 26
4, MECHANISM ADJUSTMENT
4. JIGS AND TOOLS FOR ADWSTMENT ar~m
2. PREPARATIONS FOR ADWUSTMENT. non
3. MAINTENANCE TIMETABLE 2
44. ECHANISM REPAIR AND PARTS REPLACEMENT some
5. ADWUSTMENTS. sana
TAPE PATH AOJUSTMENTS a7~ st
7. CONFIRMATION AND ADJUSTMENT OF THE DIFFEREVCE
BETWEEN VIDEO HEADS & AND & 2-53 1. CABINET DISASSEMBLY
Fig 2, CIRCUIT BOARD DISASSEMBLY
1, CIRCUIT BOARD LOCATIONS
Fig 244
ma
(Tone) 2, REMOVAL OF THE MAIN CIRCUIT BOARD
1. iEO incur (vos)
4. SYSTEM CONTROL CIRCUIT (SY-1)
Fg.222
Fg.223
qo
4, SERVO CIICUIT (Sv) 5. TUNER AND IF CIRCUIT (r¥4)
1 ANTENNA TERMINAL BOARD (TB)
Fig 228
Aten Se
as
Fin 227
8. SYSTEM CONTROL CIRCUIT AND TERMINAL
BOARD (S¥2,TB2)
Fig 228 9. TIMen CIRCUIT (FMEA) 3, CIRCUIT ADJUSTMENT
1, PREPARATIONS FOR ADJUSTMENT
1. EQUIPMENT
(1) Gor TV monitor
(2) Cele bar generator (vith FD
(3) Audio tequeeyoxiltor
(@) Antena
(6) Oxilaszope (eos
feueney reponse: TOM or mre; probe 10:1),
(6) Frequeny coumer (ourtable to 10MHE or higher
1) gta vtimeer
(8) ViVi (acuum tube vttmee)
(@) tnoutpt probes
2. SETUP
Becau the AF input sign! i und for sdstmart of
Cire, connect he clo br generator to the VHF ipat
rina ofthe VOR. The RF input ial sprocesed by
tho tonar and UF ere It important tht th woo
tut sna of the IF eeu sty te fms shown
inoue
Cone the eilesope to the LINE OUT trial of the
video eit rd thn chek the vio output sil
‘The ampitude of the sync sna shoulé Be approx:
mately 03VP9.
+ Th ample of the video signal shouldbe approx:
iatly O7Vp9.
* While’ obreing the osilosnpe or TV sre, make
Finetoning ajotment 20 tht the eae burs ep
‘sh sapproximitly OV 9
‘Chace tobe sre tha there fn spike noise inthe syne
art of the halons syne sa,
02Vep i
ow
Burt signal, yc
(ast
Video ouput (clr ba sg
Fin 344
2. ALIGNMENT TAPE
(1) gon ape or seve use
vs9008 1kR512)
Tepespend [Video a] Roda siral | Tne
Color tar | Ske —B08 | © minus
Menoore ==
au [Mepacee | azake 248 | & min
200mm I
TF eep_| SkHe —2648 | € ates
tite 4 ints
cxchannay | THAR 548 | & it
Color ber SRN ~BA8 | & nats
i [Monoseope | Tee ~2548 | € minster
133mmse [Mono | This 2548 | ¢ ints |
AF veep | S09He Sa | ties
Table
[Speciation
(1) Video sign tem
"Wacked ei
Record fgseney ‘Max, equeney 85052
asker frequen and
sevation 4, 2,358, 48, §amhae25
Mather mosiston
duiogreceding” 100%
+ Monosope
Shitehing pasion 2H mode (ew
Sheu check itching poston
Cuppa part seren)
Teen
Fin342 Coot be 198
tH CH ecking and CTL poston
ececng sil
Hieqeney and deviation 1.09012
Aeccing ack char)
CTL positon check
HB inte 1 place
in rae (he
won [a] Jals aL
‘eo TE
art emaved at postion
carerpoadag to C8 inst
Fa.ata
Lineity bending width =S4mpp ores
ETL postion| Sump ores
(2) Ausra system
Fo eal adjusment
ecaring siral
equnay and deviation $33H2=9%
ecarding ev 2H made Reference vl 20-0568,
Facerdng el 3H mde ference level =05d8
Far frequency raponn adjustment
Racerting sol
freqnney sh devin Ske
facet oe Refrnce evel 2040508
«For sid deition menrement
ecoting sal
frequency and Sesion SkH20.15He
Ascaing ee Feterence tel 348,
For oli ead hight adjustment,
Recoding srl
Teexeney and ovation THe
Reesing ee Referens level 20.548
(3) Seno signal sytem
CT rauency zesile
Dutyevee 0%
Posty Poste
(6) o8
Tope spied tt 20 0nmiees0.2%
asddmmises0.2%
So
‘the oe wing ax
Sorting ine cond
Recor time
"25 ints (nding 9, 25 count, signal
(2) Stew and dragout compenation alignment tape
‘ys. (KR)
nN
Wasven
a4
[specfitions
(0) Video siralsytem
Recording sn
eequney ae deviation V BAR
Devatan Nama eeviton
00% bn ial ad aye tip
fesquenoydeition|
(2) Audio signalsystom No orig sil
(3) Seno sgalsyem
TU Feauency zagme
Duty evle 50%
Poy Ponte
(a) Recordi tne
‘Grint siding star, 100 court, no sn)
(5) stew O.2usez aries
(6) Dropout competion Nosiaral recording (ethout
Fateain)
1) ones
inert fun
ETL poston Eom or ee attack ent (3) Dropout compensation aignmont ape
‘vo.nss
TWeeeen
[Spestenion)
(1) Vien sigal system
Recstrg sal Colortar
Luminance lel atenatin at 1 internals)
per toss (0.31),
Lene = (00831)
(2) Aas sil sstem No eznaing signal
(3) Roig tine
ntl ed fvingig start, 20 cour, no a
(a) Aaa ee
‘sores (x3. 10)
[spedtetion)
(1) Veo signal ym
(2) soda snl sytem
Recording sig!
aqua) anédevation 3334235
No erring signal
ezrin lvl Feterencs eel 0.58 or less,
(9) Sevo sind system
TL reuerey aaa
Deyeyee ox.
Poi Positive
4) ona
+ Tap speed 2n0mmiee
* Receding ine
‘40 minutes wining sat, 80 court, no signal
+ Rosen tak pattern
"A20.0 im rom tp de of tape
4 SPECIFIED IN/OUTPUT LEVEL AND IMPEDANCE
Wie!
Input: ideo input, shone type comectar 10Vpe,
‘Bohm unilned, agai syne
sileo utp, phonoype eonnictor 1.0Vp
Tah utblned, egntivesyne
utp
uto}
Input: sso inp, pin sek, 100kshm, 1068
WiC: standard ck, B04, for 6Odohm i
ance mirophone
isi ouput, pin jack, 568 (0Dkohm fod
etanc lop impedance UOkohm or more
5, COLOR BAR siGNat
‘The 75% color er Sl recorded on the aligument pes
onnin gue,
spat
Ope
Hayne sgl
Color signal wavetorm
Feats
150
Tie
Yel
Cyan
Goon |
agente
Red
Boe
iy
0 fay
T
White
Teens
Color bar patra
Fin 347 5, ADJUSTMENT STEPS
Adjust th rita te arder shoe below.
Paver Supa hack
‘System Control Cheek and Adjustment)
Tura Ajmer
Tobie312
2, POWER SUPPLY CIROUIT CHECKS
1. AC POWER SUPPLY CHECK
1) Check to be sue tat he AC input voltage ofthe VOR
fe 120V 110%
2. REG +12V CHECK.
10) Connect» tl vlimete t (3) a () of $8001,
Cig! votmaar tema: S500) (3)
Digits vom ~ teria: $5001)
(2) check ote sre theres DC 112202V,
3. REG +0V CHECK.
(0) Connect a digit! voltmeter t () and (8) of $8001,
‘itl votmeter* tem! S500) (6)
Digit vo tmeter— termi: $5001)
(2) check ta bese hares DC ¥920.1V,
4. TIMER +107 CHECK
(0) Connect a digital vltmster to (7) and (@) of $8051,
Dig! etme» trmial: S051 (7)
Dig! vate terminal $8051 (8)
(2) chock to bese here gD =10=1V,
TIMER -20V CHECK
(1) Connae a igi! vane to (8) an (of $5051
Digtal votre» termina: S508 (3)
Digital vtratar~ tara: 5051 ()
(2) chook to bere tare OD ~2053V.
6, CAPSTAN -12V CHECK (EXCEPT SPECIAL PLAY:
BACK)
(1) Connect a dita! vltete to () and (3) of $8011
‘itl veneer teminl $5011()
Dil vate ~ tri: $5011 (3)
(2) check obese sheer DC ¥12208V, 3, SYSTEM CONTROL CIRCUIT CHECKS AND
‘ADJUSTMENTS,
1. POWER SUPPLY VOLTAGE CHECK
(1) heck to sr that OC 40V i suplieg to (8) of
‘S401 on $71 baad
(2) Diack tobe sue that DC +12V is supplied to (9) of
Studi on SY. no
(3) Check to bere hat DC +50 ic ple opin () of
"001 on S¥1 baad
2, COUNTER MEMORY CHECK
(0) Setcouter memory button ON,
(2) Chek tobe ure that the mamery ination () is
Mum
(a) Sette ut othe REM mode
(a) Check to be ave thatthe tape automaticaly ops
whan dhe ape coun sing each 0000.
(61 Chk tobe sara that un svitces to REW mode an
tape reaaund avn the REV button i presed once
sain,
4. TAPE LOOSENESS CHECK.
(0) Daring te olyback, loosn tho tape ination
(2) Check tobe tte thatthe VCR automaticaly ope
4, AUTOMATICSTOP CHECK
(0) Chek to bese thatthe unit steer to the mode
Aiserind below when the metals part (en of toe
reha
Deveson during sanded fora... STOP mode
(siterunesing
Deion ding rewind ‘STOP made
ister unioaing!
SY-2 PCB, Location no.3201~
5. FRONT LORDING AND LOADING OPERATION
check
(1) Corety ant eat
(2) Chuck to >» sure tat the fot loading, and conven
tinal leona, operation fonctions erect.
5. FRONT UYLOADING AND UNLOADING OPERA.
Tion cHeck.
(0) Pres th esate ection tuto,
(2) Chek to be sre thatthe Font unloading operation
tuneton eat.
7, PLAY MODE CHECK
(1) Prete he PLAY button ane check th felling point:
‘The loading rng rotates aod the unit gos io the
lostng mde
The capanttor begins ot,
Thahead metor bait rn
The vel mot bap tun
8, REMOTE-CONTROL REFERENCE VOLTAGE AD:
JUSTMENT
(0) Pres he pov snitch t OW (uit in STOP nod).
(2) Cannet digs volute to TP3203 (8 ls) and
‘Tea201 (etree voltae) of $2 boats.
(3) Adjust VE20T so that the poten ciency ie
14020.02V forthe reference volta nd 3 ir,
8 4, SERVO CIRCUIT ADJUSTMENTS
[HEAD SERVO SYSTEM ADJUSTMENTS)
[Alter fing wpe 1 rough § of his austen, repeat
‘hep 29 make the hac etna potion aust
1. HERDSWITCHING POSITION PRESET
(1) set VR4O01 ant VR8DO2 to about he midlet
turing age,
(2) Se the teaching contol to the center (eck stop)
Position
2, APE, LOCK VOLTAGE
(11 ert seat, Put the VOR in the lt or sl TV
REC mot,
(2) Comact 1 exlloseape or digits! volimeter to
Tesodn,
(3) Acs VR8005 to et 4.0502V.
anv
4
——_—.
‘GHD bv
‘A.C lock vane
Fa3ae
3. RECORD HEAD SWITCHING POSITION
(1) Lead east, Put the VER inthe TY REC mace
(2) Gemect Cit oF rilocope to TPAD03, and CH-2
to Tait
(3) avi VR¢003 ao that the pha of he leacing ee of
the GU vel syne siraleayed 7.02054 From the
Fal of be CH waetom,
CH RF ewtching pulse
EH2: Video sigs rt syae sia
ca 9
cna AAA :
Vitine
eso head sitehing poston
cna
Fa.342
4, PGA SWETZHING PasiTiON
(1) Losd the aignmant tne, Put the VOR inthe PLAY
{2] Connect CX ofthe azileeope 1 TPO, and CH2
to TPAD?
12) Adjut VRLOO that th phase of the leading eof
the CH veil ayn signs delayed 7030.54 from
‘he flo the 1 waveform,
CHT: RF sitting pulse
(CH2: Vile gal Warts sye sana
cua
peshaey
Vise.
PGA switche postion
Finda
5, PG-8 SMITEHING PosiTiON
(1) Lous the sgmont tp Put the VOR inthe PLAY
‘node
(2) Connect Ct of he oxilscope to TPAOO2 and CH2
to Tec
(3) Adjust VAA002 co thatthe phase ofthe leading ede of
the CH verteal syne snl is esayed 70:18 from
tho rin ofthe CHT waters.
(a) Mae 2 fie aster of V84DO2 so thy the phase
Aliference of tee a fall ofthe RF site pls
(0.28 or est inst to the leading ede of He vera
sy Sa
HT: R=avtching pole
(H2: Video sal etal syme signal)
pH
cH
pesaaay Soe
Vay
P68 sting position
Fig. (CAPSTAN SERVO SYSTEM ADJUSTMENTS)
4. ll ABC, LOCK VOLTAGE
(0) onda ease, Pt the VOR in the glll TV REC
rate
(2) Const an scitascpe or intel valmeter to
TpA0ns,
(2) Aaj VRAOOT 0 get 40:02V.
5
abv
Ai
—_~—.
“GND it
i AP. tok vane
F345
2. sll APS. LOCK VOLTAGE
(1) Lond 9 ease, Put the VOR inthe gll TV REC
rode
(2) Connect an osiscope or cal wohmeter to
‘Trv038,
(3) adj vac ope 0:02.
——-
NO
I AR. took vl
Fin 246
3, TRACKING
(1) Set the tmcking contralto the canter (lik soph
pasion,
(2) Load» exsete. Recor 8 TV broaieas at al or
ad then pt the VCR the PLAY ae,
(0) Connet C1 ofan axlazcope to TPADDS, nd CH
to TPADDs
(4) Adjust Vat so that he phase itference of hese
ff the C12 woefrm i 20s0rane oft the fal ofthe
CH waveform,
Inti ntance delay the 2 woatowm,
cH itehing use
CH: Cental sig! (plybatk CTL pl
cua
one
{le 20nsee
Tackng
Fig 347
4, PLAYBACK CTL SIGNAL LEVEL
(0 Load the lyme tape, Put the VOR the
REC mots,
(2) Connect th oxilscope to TP4DD8
12) Chuck toto aire tht the peak value oft payback
entre sal net 300nVo-p 0° move.
(caution)
thw pk we i ss than the specified wie, gust,
he tape pat,
00nV0y
Peybsk TL silat
Fina (STILLFRAME CIRCUIT ADJUSTMENTS)
Adjusts of the slsrame crit ae to be made with
fhe VER inthe STILL mode (ll. Aju eath VR while
uring the pls ond noise ented when the anti
bitched tothe STILL node
Before making any slustmens, make the stings
(ese blow
Got the trchng contal 19 the canter (cick stop)
poston
Shortleit the tax points of the VO-T and V-1
boars,
uci eat tesweon TP2003 & Tez00¢
Sevo creat eto TPAOTO& TPOT2
+ ut the VCR intel REC made, The record video
Sina from 2 TV brosesst and 2 aut sigs fom
nmin generator smaltaneasy (Ie, 1028).
1. STILLFRAME BRAKE
{11 Lons the exec ecard 2 the sting and put he
‘VCR intel STILL mode
(2) Comnect Chto the atilesop to TP400, and CH 2
ta the ai output termina.
(a) ra te STILL butoe, poly the tiger a he CH
rie,ane berth ud utp sna,
{ay Adjust VD and minimize the waveform attra
tion tine of the aus output sane
r
“ ost
cna.
same bake
Fig 349
2, STILLFRAME BRAKE TIMING
(0) Load the ensatte recoded tthe sting and put he
VOR inte pI STILL mods,
(2) While presng the STILL button, obs the nie
the upp an ower edge of the TV Seren.
(3) Tum VAA0Ie, The pasion ofthe VA at which nie
epi to appt at thw pper eda he seen pint
{ah In the su way, tn VRODDS once atin The pos
fin of the VR which nie bein appet atthe ler
Edge of he TV ren pei
Ie) Then jst VREDDE to spin halt way between pont
‘Rand pint 8. hi pola i paint
(g) Tum the acking contd to the lt nd ht, and
Check to be sue that the cater (click stop) goon is
atthe center of the ange ia wich no noi eters on the
Vern,
{caution
Tr te clk tonpotion sot atthe center of he noise
fang, make og adustnst of ols thit th lick
‘fog ponton athe center of thera ran a od
Setting pint song point 8
a bei
ae
Wee
vvrsoo
PR runt cet
ine aa
Fin, 3410 5, VIDEO CIRCUIT ADJUSTMENTS
{ADJUSTMENT CAUTIONS)
“There two typet of astm ofthe vide ict: the
Diaybth grou of ajuments ane the reading group of
‘Ghastert The playback eoup of ajustmens ae made
inthe PLAY mode by using an alignment taps, The rca
ine goop af ajsniente are mae inthe E- de ad the
REC. mode, Thee ave, moreover, Y luminance) sgl
Inlustoants and (eominanes) sol ajustments beth
forthe plyaac group of ajstmens and for thera
ingroup, The oder in whigh elusmerts arto be made
tere be.
or video ctu adustents, itis bas principe that,
tujostents ae not made in the order desribed below,
forrct fastnant wil not be pole ander the adjued
valu may devise,
For these eas, then if tagustmant mace daring
the adjstnen proces, readjustment ofall swseqoet
itm wil als eer be ecesary
In poticoly, teme 3,4, 7, 11 and 12 should be gen
spatial atten,
(SETTING BEFORE ADJUSTMENT)
‘Cont er TV tthe VHF output ering
Unless eter spel, xt the tracking cnr 0
‘thi cantar(lee p)posins
Chuck to Be sue thot the ape path adjustment is
arn
Dae ‘uses [Lote Vie
0 roan equeney reponse PLAY ¥_|
2 B.0.6. sriity PLAY ¥
3 ‘MEE aeiation eausney ray |e
4 ABC. EOE Y
5 Comt iter ee | ¥
6 = Evideo output lvl ee ve_|
jaar AGS a ee
4 ‘427002 BF, Ee
a Chinas sil (270K cari ek [ee
0 (Gaia VCO. “PLAY
[4 oie concer - PLAY
12 | ___ Luminance sina paybck vel ee es
8 Color (chrminaes sal rearing cure eC
[i Monoshrome (luminance sigaleording curent i
6 ‘Syne tip cartier feqnney and FU Trequeny devin [rec |
L_# ‘Special playback dummy V Wert yee inet postion ‘PLAY vz
Tobie 81 1. PREAMPLIFIER FREQUENCY RESPONSE
se this auton spuaaly for CHA and CHB. The
Ce Bedjsimets ar show in ptethaes.
{i} Connect an eslowcpe to TP1OO, and eannet the
tte age tril 0 T1002
(2h Poybek he st RF sun siral par ofthe sgnnent
{ape V.003) jut the racking contra wile watching
the elocape, and st the tracking positon so that the
‘utter sas
(3) adj VR00" (VRTOOR) so thatthe level is lt
brn 2H 5. TMH
In tans, ats tat devel erence inthe
ho age Benner 2H and 6.12,
‘Van0D} nualaer A
wvrione Equa 8
Teint Envelope
‘rion
BF withing pulse
]
al
i
iy
Preamp, frequney response
Fa.384
2. oe. sensirwviry
(1) Using an alesdy aeorddvideo tape, payback 2
orion fhe apa were dropout is ra
(Cauton
Seth tracking cont the best pint
(2) Tum VRt003 st the wy tothe lt leking ar the
ata ste
(3) We watching the TV seren, ura VRI003 souly to
tha raht and atta the point where dropout i ne
longer en
(G) Paytak sh tape once gun and cack to bese that
ropet has appeared fom the TV sr
{caeson
Note that mo pictore wi be sun if VANONS i tre
comply he ight,
Dropout
_/ |
TWeeieer |
sion (before austen)
Fi. 352
Dropout appears
Tere
ropes compensaton aftr adjustment)
Fig 253
(Adjustments sing he Agent Tape (W003)
(1) Playback she alignment tape (VS0080) and set the
teskng conta tothe bet point,
(2) Ture VENI a the way tothe et Gackng fam the
patter urfce
£3) hla wating the TV sen, tum VAIO sony 1
tho right, and mt othe plat where cropat pat is
owt ti of pit
(a) Playack ne tp once ssn and eheck obo sue hat
All dropout evapt art A as isppeared form he TV
Dropout potion
Dropaet compensation befor stn t
ema Fig 355
[ngjustments Using the Alignment Tape (V0068))
(1) Payback the alimment tape (30069) ond st the
{ecking contr othe bst ol
(2) Turn VAT003 a the way to the ef Cooking from
‘he pater ure.
(3) ie wateing he TV see, tn VR1003 lowly to
the rst and make fine adjustment tothe place whee
rope daappeas Vom pat B, prt A sot compensated
nd noe fminimicee,
4 a6,
(1 topot 9 sina whieh ineoles 100% white from 2
olor ar inet and put the VER in he STOP mode
(2) Connect sy oxilscope to TP100.
19) Turn VAI ll the way oto let looking fom the
pate surat), and maximise the A.6.C. leh
1a) Adjust VEO to gt 0.750.01Vp9.
16) Then wae he syne lvl VR onthe clr bar pneatr
to redce these leo he input sig a all.
(6) Asst VFTOTS to get 0 80-0.01Vpp
F— mi3.5ise0 ef
ASS,
Fig 357
Waren
Dropout cmpanated TV pitare
Fin 258
2. 3s OSCILLATION FREQUENCY
(3) aya urea video tap
(2) Canna freuen euntr to TPO,
(3) ajt T1007 3 879545025 10He
(Cowon)
‘Te impedance of he frequency counter measuring probe
may cuss a change nth equecy
s, coma FILTER
1) put cla barsga ad put the VCR in he STOP
node
(2) Connects osiloeape to TP1OS,
(3) Atrnatly asst VATOTT and 101 otha he evel
ofthe ehrominonce signal af she mile of the laminnce
nal imine [OR a
Chrominaee
(5 — 1H(63.5540) —>|
Com fier
Fig se 6, GE VIDEO OUTPUT LEVEL
1) Arpt ear Bar sil ané put
(2) Geant nazlonope to TPIOT,
(8) Adj VA1OO8 to pt 1.00:0.05Vp9.
(conto
‘Thevio output termina twemiats Soh.
Fe 10163 Suse) —ep
video output ee
Fig. 359
TAGE. LEVEL,
(1) pe aor ae Spl and put she VCR inthe STOP
rote,
(2) Connect nomitesape to TPO.
(8) adj VATOHD to get 080:0.01Vp9.
1H(63 Suse) —=]
AS. ten
Fig. 38:10
Ae
;
(3) Adjust VAI009 20 thot the 4.27 carrie em
ne ve! ofeakage on hase ine) sine
face
|
|
Fig 3511,
Cala
[163.530 il
‘4.2m ak
Fig 3512
10, (4AM V0.
(1 Loal the slgnment tape, Payback esl bar
Sou
(2) Conset a dt voumeter to TPIOM.
(8) Adj VR ro get OC 840-008, 11. NOISE CANCELLER
(0) Lasd the alignment tape, Payback a gl color bar
sina
Connects acilosenpe o TP102
(3) ajc VENODG so thatthe output waveform imi
zl (loses oa),
J+ 108.78) ——e}
Noise cancer (etre adjustment)
Fig 2513
[= 10016 7m) ——>}
Noi ener (ater adjustment)
Fig 25:18
12, LUMINANCE SIONAL PLAYBRCK. LEVEL
(1) Load the alignment tape Payback a pi calor bar
sina,
(2) Connet an xiloope to TIONS.
(@) gj VRTOO? to get 1.00-0.08Vp-,
(Couton)
“The ide output tema! terminates 7h
‘00
F— wes 5.09 —of
mince sgl plyback ee
Fig 3515
12, COLOR (CHROMINANCE) SIONAL RECORDING
cunRenr
(1) nt aor bor signs and put dhe VCR io the REC
node
(2) Conoctan esrloseope a T1014
{8) Turn VAN004 athe ay tothe ight simu eh
ooking forthe pte surae
(8). Adjust VRI0OS 0 thatthe hrominacs signal recor
ng leapt 40:2mVpp
(5) Check to be sure thatthe bust signal when the VOR i
‘teed to changes eproxitely 648
(caution)
Coneet the ground pro of the asitescope to TPOTS.
‘Als nate tht, bene TPIOIS tsa (REC +21 ie,
tare shoul te taken
Bursts
aomvpp |
}
[a ten) >}
{hroninane signa recording curet
Fg. 3516
Busia
Fig 3807 14, WONOCHROME (LUMINANCE) SIGNAL RECORD-
Ine CURRENT
(0) trot sgn which inlodes 1005 white trom =
Colton erecta, and put he VCR in the REC ode
(2) Cone an aeszope to TPTOTS
(3) agus VATOOE to get & lminance signal eecoring
lew ef 10~ T7OnV9.
(caster)
Inthe se way afr adjutant of the chraminance
Signal coding curren, connet the gourd probe ot he
150-170nVe9
inane sea resodingearent
Fa. 3518
15, SYNC TIP CRARIER FREQUENCY AND FM
FREQUENCY DEVIATION
To mike thi suman, atrately make the afustnents
dncrba in items (1) trough (3) and (2) trough 7)
below. Repeat ths proceure unt bth afjustment valves
ae eet
{1} Under conions of nosignal vdeo int, terminate
‘he deo outpt terminal at Toh (with VCR in STOP
rade
(2) Conse raqueney courier t9 TPO.
(3) aj VATOTS wget 6820 08M
(caution)
Win aitching to nosiga input, ao open the video
‘ng S100) fromthe tuner opto wth the de input
teem
12) tnt acolo bar Sl, and put the VER inthe REC
made
(5) Cenect an ossilosope to TPIOI6.
(6) Poyback the ead pat, and check tobe sue tht
"he out ee is 1.00:005Vp9.
(7) the. outut lve i nt 1.002008Vp9, aust
‘Ror, rear calor bar once agin, ad play I bck far
confit,
[= twto3sise) a!
| Syne p erie frouaney and
Fit equncy deviation
Fig. 3519 |
16, SPECIAL PLAYBACK DUMMY V (YERTICAL)
SYNC INSERT POSITION
(0) Leeda cave. Record» TY brows
(2) Playback reread pot, and put he VER inthe
STILL mode othe SLOW mods,
(3) Adjet VAQOD2 ofthe aro circuit (SV boa 0
thatthe V jt (ery Tne movement ofthe vera ye) is
rime.
ey NO
ONZO)
Teron
Speck peybck dummy Vayne
inet postion
Fig. 35.20, Fin. 3521 Cicuit Board VO AD 6, AUDIO CIRCUIT ADJUSTMENTS
‘As show in Figure, an suo fraquancy osilor, an
SStemotor and 9 VIVAT sre used to make ajusmens ot
fhe aio eit, Te utp sal ofthe acl Fequerey
tinor shoud pats though the atruaay, an then
‘vou the input eens, and be comneted tthe VOR
‘ula frequency
‘silt
Arenson 6000
uo input ernie Ling, The sia from the
tudo cei snould pas rom the audio output ein
round ie oupat) othe output restanc, hes ea
canbe oben the VIVE
‘ui ng output
[Tis
Fig 364
1. BIAS LEVEL AND OSCILLATION FREQUENCY
CHECK.
(1) toad» caste, Put the VER in the noel REC
(2) teanet the VTVIE 1 MCE boo (10008m bath
ds) TP3EO1 and TSB,
(3) VR2ODS to gt 36m.
(a) Conner frequency counter to T?3801 and T9802
{G) Chak to be sure tot tae ian exlstion Hequency
ol 7s
(cout)
“The nasi! REC mode obtained by eannetn nly
2 bug tothe slo input tril and tan puting the
‘VoRin the REC made thus inteapig to nput
Sg,
‘The VIVM and frequency counter ae coneted st
fotoas:
easuemont probe
round probe:
reagot
rao2
ncopce,
10K=2 oF more
J
2. RiL6, OUTPUT CHECK
(3) Connect the aio freuen oxsstor 1 te auto
input trial and et for an ozilition outpit of Tk
“roabs
(2) Connet te VIVA ote audio autput trina
(3) at forth elerene input ia te (1) sabi, ns
then et eat input lel rative to he fleece apt as
thse bon, ond eck tobe ae thar tested is
‘stig
Tipu ne output vel
208 e248
“aca E1568
“20 Tieédbs
4. RECORDING CURRENT LEVEL CHECK
(0) Connect tne aio froueneyossiator tte audio
Input terminal an! et for an oxilaton outst Ike,
“foes
(2) Connect se VIVM 0 TP301 and TFOBO2
(3) Shorccedt between OZ010' tie and eeniter or
‘etween TP2DN and TPEOO and ta thee
(a) Lond a exsete, Putte VOR in he st REX rvs
{5} Cheek toe sve thot the ecoring caren wel of
S2:08mV, 4. OVERALL FREQUENCY RESPONSE CHECK.
1 Connect the suo fraguaneyosellotar tothe audio.
Input tema, a st for an xin output of TRH,
“nee
{2} Connect the VTVU othe uo output tena
(8) Whit forte retrace inp in iter (1 to tbe, and
‘hon fue the apt eal 38 ative 0 eerence ng
Ue) Lond» excite, Pat the VER inthe il or sll REC
no,
FE Sit the oseiitionfequeny ofthe audio trequency
ccilitor at shown inthe figure et tho ah nd make =
tearing ofeach for aout TO sean
(6) Playback the eotie ecrded tl orl and check
to be are tat the playback aut lee of each Trequncy
inition age shown Inthe igure bean,
(caution)
IV the oupat lel of the igh taqueney range (See or
Fiphed is not thin the efrees range Gl or all
frequency epons), readjust the bie level as described
blow
TY the upper limit ofthe high frequency range isnot
tate
Fs the bi velo 38m
+ Heth lower Hint 0F the high foqueney range i not
tsi
Cor theta ov to 38m.
50 100 333,
1k 5k 6K 8K
Frequency respons ll)
Fin 363
80 100 333 1K SK 6K
Frequaney response (I)
Figg
5, RECORDINGPLAYBAGK OUTPUT
(1 Connect the aio frequeny oseilator tothe aia
Input terminal an et fran ostilation output of hz,
“ues
(2) Connect te VIVM to the suo outpt teria
{3} ot forts ference input into (sail, and
‘han pt the VER inthe REC rode,
(4) Adjust V2002s thatthe record 1kH2 output el
becomes “Sdn the PLAY made
(5) Chak, by fang tems 1) through (2) above tobe
se thatthe alaybaek put lel ofa ll reading is
“520,
5, PLAYBACK AUDIO LEVEL CHECK.
(0) Playback he alignment tape (V.0128).
(2) Conner toe VIVI ta the audio output trina
(@) Ghack to be sure thatthe el aucio playback eve i
“sold
7. SIN RATIO CHECK.
(11 Conseet he audio frequency oslo to the aio
input timing ad et fran onion ouput of he,
“i0HB
(2) Connect te VIVE tothe aio ourpt trial
(3) Woitfor te etree input in ite (1) ie and
than pt the VCR intel REC mode
(G) ater ecrdig 9 The signal Tor sour Sgt he
tape courte, cut the input sigs! and then record the
avnput gn nthe eae way for about 5 dis
(caution)
PR nanpt sil it ebsine by inserting har pain the
fusing emi wading the VOR ne el
(5) Payback he eorded part af th ape.
(6) Chak to be sue tht he ference bat
Syl lets the noi level 04 or me
(hin th save wy, menue the SIN rat tl, 28
theek to Besse tht 5 3808 ar mare
the The (Par side view
VO=1 PC B.ioexon wo
Fig. 265 Gieit Board VO, AD 7. TIMER CIRCUIT CHECKS
1. TIMER +20V CHECK.
(0) Gonnet ja votmaar to (7) and of 7002,
‘igs! votmster + teil: P7002 (7)
Dail vtmete eral: P7D02 (8)
(a) Chee tae sie that re +10=1V.
2. TIMER ~20V CHECK
(01 -Connet ita vals 1a (8) an 3) of 7002
igs! volimatar tein: P7002 (8)
gil volmeter~ terial: P7002 (3)
(a) Chek tore hat tere DC ~203V.
4, FILAMENT VOLTAGE CHECK
(0) Suite he ital votre 0 the AC voltae sre
fen med, an eonnet opine (1) ad 25) fe Mares
tent indore
(2) Chek to bese that tere is AC 2.42028V.
4, CLOGK 1 (Xin) CHECK
(0) Comet an oscioscope to pin (18 of 167001
(2) Check to be sre that th sinewave pr but oat
exact 800k
-5-
5, CLOCK 2 (6a) CHECK
(W) Conaer an esitesnpe to pin (7) of 17001
{2} Check tote aura ta here fa OMe retour wave
3th A poner supply fequncy
ww
Cock 2 check
F374
6. RESET INPUT (L LEVEL) INPUT CHECK
10) Connet dats! alnetr pin (8) of 1700.
(2) Check to be sre that tere sa sautonth wave when
the poner sich in sitees DN, hd that there is OY
{Ulva ein narma operation 8, TUNER CIRCUIT ADJUSTMENTS
ARTA
(1) one to ay TY broadest
(2) Switeh the AFT switch to OFF.
(3) Term the toning UR to the et and ight, and agus so
thot the wud (202) bet sgl dippers fom the
TW sca,
Ue) Sieh the AFT switch 0 ON,
{5} Aljst T6I02 so that the sound (920KM2 beat Srl
sisaqee,
(Couto)
Suan T6102 tothe et ard right wile obsening the TV
fereza, ang afer corfiemig thatthe sound best apes,
rake he austmants0 that cannot be sn,
(6) Suite the tuning ewiteh to rea each of the TV
road towbihthe VOR ha bee ree
(0) Ohana the TV soee foreach TV broadest, and
theck to be sre the 04nd bes as cpp and that
the esarkar nt.
(cavton)
IW any of the above candies rcognisnd on the TY
3, djs TOR
Fig 381 Gicit Bard TH (Part sie vew)
DaART2
(0) Dtconnect (pat eotion the VOR: TV tens
Input (VHF ard UNE inp tri
(2) Connect’ det vatmetr between TPBIIS and
‘Tesi,
(@) Ast vR6102 o thatthe voage betwen TENTS
10 TP DC O05,
2 RF AGE,
(0) Tone to my TY arodent, Ast the mantor TV 0
emphasize theTV smn contrast
(2) Turn VRGION to the lt and eight and ajst so that
‘th sna onthe TV sree apes,
(Caution)
Turn VREIOT 0 the et and he while obseving the TV
sere, an, after confiming that sow nok apps, make
fheedjurmen:eo that texnnot be
(2) ited the tuning such ta ressive eth of the TV
broodeas oubih the VCR Ras bea preset
{) Obsone He TV somen foreach TV bradea, an
heck obese that here sno enw oe, tering baat
Inetetenes cused by crosman
(caution)
any af the above cancitions are recaniané oa the TV
seat, reat VABION
TN-1PCB,
LoCaTIONO BO.
ee
WY 4, MECHANISM ADJUSTMENT
1. JIGS AND TOOLS FOR ADJUSTMENT
Wo, hanes sam | tena a
1+] sneering tt yam) | vn00r2 | masuener FW PLAY, RSEARGH wept
| 2 | soi tinge 500 sam | soe | teen: FD, RE aeup te
2 ote ie
| ecomieswoaier vs0017 | Tipp aone ]
| Hora wach voama2 | sen bck eon ie
[6 | Tee gm ort 1428 | earner wg te
ee vases | etinneatne eae]
8 | Alignrunt te we0093 | Tape path lament
9 | comnesandpigee | vl0105 | Adin a me “|
10] Heportwech | vse | itary ;
|| ene ‘vs0109 | areata morn ene)
12| Poston adjustment pauge 50120 | Adjust o back tension guide
13 | chmserssimecsime | wuoret | ade cus ue
16 | eosin ta ware | _Forsactoneatng vp eg Gam oi
5 | Geeapicmrimd | worzes | speetndetveingpicnevontan won
yoo
\
®
va0n1s
vane
\
| vsooss
SiN
| 2, PREPARATIONS FOR ADJUSTMENT
{REMOVAL FRONT LOADING MECHANISM AS (3) Hove te i scombly about
SENBLY (Se Fig. 21), ‘mm inthediction af the arom, and rove iby ing
[n) Remove the eonneor fom the CS ine.
(2) Remove the connectors forthe erste (caution)
{3} Renave the 4 screws} andthe Tar (o)touing When ravage font lod
tho ot loading vachani sembly and el has, the leis, be suet ho
Fig 424 2. DIRECTION OF MOVEMENT OF THE CASSETTE
HOLCER FOR MANUAL OPERATION
(0) Renae th eabinet an the tuner eit board,
12) When nating eset tue he sip rol soy
Inthe diectan of the ow (loci). (See Fa. #22,
{G1 When removing» erste, tum the sip rol sary
inthe Siecionof the srow oumter clocks)
(Ser Fo.423)
(caution!
Whar tuning the sp ele axanbly ether clockwise or
fount clack, Be ebetul not ta touch the bel with
our gu, te
Sip lier
errmbly
ip roller
sembly
42. OPERATION OF THE VCR ONCE THE FRONT
onving, MECHANISM ASSEMBLY HAS BEEN RE
MOVED (See Fy. 424,625)
(1) Turon ta poner.
(2) Pr the eae sitchin the etion ofthe aro.
(tine the caste ate noteoninwusy pres vl
not foneton) Perform adjutant for top path wit he
EL mechani sserbiy athe,
{3} ‘Themode wll ange i arcordance wit he option
button whi pre
(@) In both thy REW and SEARCH mades the salty
mechani wil funtion i he tkeup rel Bae doe not
ott, tert, manully rotate the tekeap re base
toc (recon A. ee Fi. 825)
sete sith
Qh
Tote
Fags: (ntsmat Rowton ofthe Leating ing) (Se Figs. 425~
428)
(0) To toa, manu sotat the lasing atar pulley in
the diction of ara A, ané the loaing ing wi tat
‘aume locos,
{2)'Be the completion of the lading condition, the
Teasing ig Hopper wil function to stop the oat ring
rata. (Ste F427),
(2) To nox, manually ng mator ple in
the deeton of arow B, tte loading ig wi oat
eck,
{G) at the completion of the uloaing conan, te
Teac in topper wil funtion fo stop the as ing
rotation, (See Fig 428)
Stopper
Loating ig
Loading ing
stopper tos
onting is
F426
Loans ion
Stopper
Fig 428 3, MAINTENANCE TIMETABLE
ooo | 1500 | za00 | 2500
]
3800
[Aj4alala Al Al dl 4l
| AlAlAlA
ALAIAIA
Foes AIAIAIAIA AJAIAIA
_— A | a
— | AL A
nat a A aA A
a Ree eae
camer AoA A A
Tobie 4, MECHANISM REPAIR AND
PLACEMENT.
PARTS RE
‘efor relcing any ofthe fllning parts, be sue tsn
tthe power et the power utc ote OFF postion oF
pull tthe poe ne rom the ouput
* Vio hed eum vdeo hed moter)
Vides best
‘uifconol hed
Falter hed
Nero svitehes (ast, lain 1, loading I erasure
Fest moter
Captan motor
Uti motor
Fant adig maton
“ipeend ers (10, NEW)
DEW enor
Fal base eae
(Caution)
be epeiiy sure that th powers off [the power sth
Inthe OFF postion whan connecting or dsanneting the
fonmectos of the video head drum apd of the capstan
Foti one of the connector i conaced or di
oncected wile the paver ton [the power sith it
{nth ON postin) the eral Cs wil be draped
1, VIDEO HEAD (St Fig. 441)
1) Tum off the power. [Set he power suite othe OFF
postion)
2) Move the video heat drum to «postion at which the
Vide eae ae ony ocr
(3) pe eat at several times wih he darko prt of
the hed leaning sek TF the Reads are excremely cy,
wipe more tines,
(Cason)
Fetter oresing a finger on the head elning sick to
les the ads oat pes oo hare,
obo nt move the hed ring sick up and down
{ist the video a; doing Sa will damage the brad.
3
Vito teat
Chang tick
Finan
2. CLEANING THE AUDIOICONTROL HEAD AND
FULLERASE HEAD (Se Fis 442, 64:3)
[ply aol to the cleaning sick ad move the clsnng
‘ck opsinst he ann the diretion af th fod
J meio anti
Chang sik
Fig a2 ean tick
Fl me ead
Fag
3, PINCH ROLLER (Sn Fig. 64-4)
{0) Using sof loth moistened with aleohol, ces the
‘razr ofthe ine ler
{2h ito are surateher on the pinch roller, ove the
ing en ele the pine aller leer ase,
$F siog
J tone asienbly
Lasting
Fig 448
a TAPE PATH
Clean the srs ofthe tape guides andthe drum tape
ath by wing a maf oth a cleaning sick steed with
sates
{cout
han aning the drum sacs, be eet not to contact
‘he vio hae.
5. SUPPLY REEL BASE (Se Fig 445)
(1) Renove the FL. rachanism asambly. (Rete 0 tem
2L.PREPARATIONS FOR ADJUSTMENT)
(2) nove dh woshere lia he supp el bas
(3) Turmthe rhe rake in the Getian of ara A
(G) White prasing the mode sleet side inthe direction of
row 8, remove the supply rel base and ple.
(covton)
ecarfl notte las the eight aust spc.
(8) Wp lf holo from the vel shaft by wsng = ath
role with eal sh then spy stall amour ot
1) While psig the made select side inthe ieatin of
arr 8 nal the supply es as, and ple. Ite
Supply reel Se fe bey intl ast the eal bse
gt (efor em 5, ADJUSTULENTS, 1 REEL BASE
HEIGHT).
11) Maat he washers, and then inal
sm aso
mecha
| ha te 6. TAKEUP REEL BASE (See Fig. 46)
(i) ura the Fs, mechanar abi. (Refer tite
PREPARATIONS FOR ADIUSTMENT)
{a} Remove the washer bling the takeup el bse.
(3) le resig the mode sett sce nth deeton at
‘Srom Ast the takeup rl sot rake inthe direction of
‘row 6, emo thetakeup reel bse
(couton
Be cal nat tol the eight adjtment sont,
(6) Wie off theo a rom the re shaft by using ath
‘motiene! with slchal, ad thea apply small amount of
rev
{a} While presing the made sect se in the dition of
fron ard the okey et soft bake i the cretion of
{rr 8 ntl the takeup es as Fn take re
es being ital, at the el ae heh (Refer 10
item5, ADJUSTMENTS, 1. REEL BASE HEIGHT)
{Gy Mount the wakes, an then intl the FL, echo
ics =
‘iw ——=g
wae
{i sausiner——*
spe
searing
/
ode leet,
‘ide
Tate uy ret
sot brake
7. REEL BASE DRIVE GEAR ASSEMBLY (See Fig
aan)
(0) Remove the FL mechan assembly. (fer titer
SpnePanations FOR ADJUSTMENT
{2} Renove the suppl reel bas. (eer to tem 8
SUPPLY ECL BASED
(3) Remove the takeup rel tase, (Rs
TAKE-UP REEL BASE).
Tat Remove te scm (0) wich secures the ratchet bak,
fg than ve the re
(8) Renavathe ree mato bet
{B)_emove th cone () wl secure the ee base ive
{ear asembi, an then ramove the sembly
{at Remove ine Eng, ard hen remave the canter get
hd the FWD/REN lever. Next, ramove the washes, 2n6
than emovethe PLAY ger and the F EID/REW ot,
{8) Clean a apport shaft of the FFHD/REW ive,
emerges and PLAY lever ard also the shaft of the
F eo/ne rler snd PLAY gar by as # cloth moi
ened. with dahol and then apply ® smal amount of
ew
{By tnt the PLAY gee, the F FWDIREW ctl, he
PLAY tev the ceter get nd tha FFUI/REW herby
feveringtheramoel procedure
(io) Uns teot baz rive ger aby, The rong OF
the and of te mode slat side sould fit ro the ole in
the mage ska ves
(1) Inger
(cauton)
Brae that the bt fot tied, an be ctu ht i
fees nat aton te bl.
(12) tnt te eet bee Part A ofthe tee rake
‘onid bmn eamtac it the wn ofthe mod tet vr
113) rt th sappy rel as, the akeup res ba, ond
the .L mechanism asemby,
(castor)
‘The rel bam ive gear asenbly should be dsasambed
foreleaningandubatan ony
ft item
‘nator bak 12) rayne ate
F EWO/REW
role
ode sstect
fast moter
, BACK TENSION BRAKE BAND (Su Fig 44.8)
(1, emave th FL. mechani acy. Rafer item
2, PREPARAT ONS FOR ADJUSTMENT)
(2) Remove the supply eel bus. (Reer 10 item 6,
SUPPLY REEL BASE
(2) Remove the ee bus drive gear sembly (Rees to
item 7, REEL CASE OAIVE GEAR ASSEMBLY.)
(a) Disconnect the brake nd lever from the ack tion
le.
(5) Remove the screw (a) which holds the brake band
bracket
(6) Remove te bsk tion bake band by pasng the
brake Gon ler under the asin in,
(7) nell the now take band by revenge rama
procedure.
(caution)
Becartl not m rae a atch he naw brake and
(a) instal the el base ive pr ue,
(a) naa the sappy el ae,
10) Ast ts postion ofthe back tenan ler. Rete to
tam. ADIUSTIENTS, 1, REEL BASE HEIGHT)
ITH) esate FL, mechan aso.
fake ta
enc ein fre bn
Iwate hand her 9, AUDIO(CONTROL HEAD ASSEMBLY (Se Fig. 449)
(0) ero the sre (8) which bol the asifeonl
Fed sary, andthe ferave the soared ia wi
(2) Isl the ae auveonl heat asenbly.
(coutin)
Beco olde the ad wre the correct postion
(a) Aaj the tope oath, (ler wo item 6, TAPE PATH
‘AOLUSTMENTS!
‘wow
Play the agnmenttpe(V0099 or previously recoded
tape the paybek nar) sjstmont snot sey
Ausialont heat
Fag
10, FH SENSOR (Se Fi. 4410)
(1) Remove he ed wire seed to the FWD ses.
{2} vite pressing part Af the FWD seen inte die
tievol the eran eave the ser by iting tupaar,
(at trtl he mw FAD 0,
(al When cir the instalation, ft tha ol ofthe EHD
Sena om the pry € ofthe bracket hed, and pres
Alowward
“ge
Fig 2010
11, REWSENSOR (See Fig, 4-1)
(1) Reroveth ue wie adeed to the REW ss.
(2) Remove the sew (ol, and than amave the REW
‘anor ase
{3} Remove to far sci the flee drat bons
then, ster emaving th ging remove the REM
(caution)
De not to fo rit he lei iret boas.
(3) tal te nsw EW sean by asng she revere ode
ofthe remo proce
SEP tebe
ee ttn 12, OAPSTAN WOTOR (See Fig. 4412)
(1 icone the capstan metor connector.
(caution
Be sue thatthe ower i off [the power switch sin the
(OFF gestion] whan conecting or ciconmecting the
centr
(2) Remove the capstan motor bracket seen (a, and
thantemove the bracket,
——_——
(3) Remove thesis (bscrig tho capstan moto, ad
than remove ts moter.
(G) tall the new capstan motor by using the reese
det ofthe renova procadue.
(3) Acjust the tape path, (Reler to tom 6 TAPE PATH
ADIUSTMEN"S}
(wot)
Piay the alignment tape (V0095 or 3 previ eared
as
‘api the playback frm, ajstment ot
Capston motor bracket 12, LOADING MOTOR (Se Fig. 4413)
(0) ere the ae wie oer to the loatirg moto.
(2) Aamo the sting motor bracket sre 2 2nd then
fame te lading motor seb.
(a) Remove he ating bl
(a) Remove the eee) hich eure he oating motor,
fd hen remove the motor.
(6) Lonsin th et seen (6) which sues the loading
‘rotor pally by wing the hexagonal wrench (VJ108
U2}, and then roma the ple.
(6) Mount th lng metor pulley tothe nee ladng
(Caxton
‘Whe: mounting he lang motr pully, be sure toast
there
(0) ntl the lading moor by using the roves ade of
‘he mova prceeure
——
o
Loating mater ploy
Laing tor
aes
toting hater
i
Loading motor
Fig. 44:13
14 LOADING RING (Se Fig. 84-18),
(1) Remove te FL machaion szmbly Refer ite
2. PREPARATIONS FOR ADJUSTMENT)
(2) Remove the supply eat base, (Reler 9 item 5.
SUPPLY RESL BASE)
(3) femovethe ratchet bake.
(8) Isr th cued tip ofthe presure ping atached
to the pinch roly pressure lear into the hale Bin the
lea.
(6) Cut the fixer sewing he tod ie w the backer
hed, Remove the sole rom the En (ltrs ead)
termi, ane thn remove th ld wi Renove tee
‘cringe brake hae, and then remo the Bracket
esd
(6) Remove th AEW stor asambly, (Ree 19 tem 1
EW SENSOR]
(caution)
nig ot aces to remove te
tothe REM re
(0), Dianne th connectors, le wire,
wth vide bebd Toad re connactar (he connecter
whieh contected acl board VO",
he vari lad wie connectors fr thepudi(contal
ud, he fu ras and,
"The DEW semor (00 no break the sole on th DEW
sae)
(G) Remove the bracket crows (a) of th leading rng
‘upp olla, and han emave the rake.
(3) While psig the back tension evr nie dation of
tera Gand the mode sl sf nthe ition of ee
Dy sie he bang ng upward ed remove
(Cavtion)
Whan prison the back tonsan lever, be arf not to
bras th bck tanion gui. In adtign, beer a 9
{ertch the seo aad um, he ven ea, thea!
antl hae the bck tension gui, ee, en touch
‘he leding ie ote pinch ler,
1 ite which isola Pinch rie
Spring oi
a
‘erow Gand he mode sie sige he dein of za
1, ne the aang ig, and fit he yroaves othe
two sipart oles on he seared te,
(caution)
‘When psig the back tension Iver, be earful nt
rasa bac eson gi,
(2) Tigten the becker seews () of the losing tng
sinpor es
(Caute)
8 sre thatthe latig rng ise inside th ponves ofthe
Suppo ols at all thee ple. A, be sure that the
leading gear and he lading ring gear are sary inter
eset
Loading
suport aller
ack enon
“Tevet
(a) set
of lossig.
insta the bk ha
* Pas the fixe though the hale nthe rake hes nd
‘hen bunch sn eure the lsd wie Be sure the tele
wie doe not Yans down, end be rfl nt te te
"ruth presi on he rok hs
Sole ted wie ot flere hed trial.
(4) Rove the cured tp ofthe pinch role presire
Spring trom the Boe Bin the pinch ol ps ee,
2d eonnet te ws ofthe man cha
aang cng othe condition the campeon osdian ing
sport ole
Pinch ler presire_
spring ai >
inch aie
presale
oan ing
Loading ing
spor ale
ode est se
Fig 045
(5) Intl the athe brake and ater pots by rng
‘theorer af the ramoral procedure
(canton
‘Wier the loin sng inte condition of lating comple
tion ital the REW senor asiembly as shown in
Fie
(6) Pay
hing
(cation)
Wien inating the fang sing, eee not to srt
the vdeo head dram, te vce Heads, the ausoleonal
hn th back tens gue, ee
viosly recorded tps and check that heres
ith he tape pat
Fig 4418 15, REEL MOTOR (Se Fi. 44-17),
[1) Renove the FL. meinem ssa. (ler oem
Z.PREPARATIONS FOR ADIUSTIENT)
fa) Remove the lod wite which is soldered tothe 1
[2) Remove the x! motor bol
[4) Ramove the el mator mounting ees (9), and then
ramovethe motor
[E)-Lonen the str (which sxures the rol motor
pulley by ung the Rexagoral wench (VOTO. 28),
nd thes remove the pully.
18) Mount the ret motor poly onto the new motr.
(coin)
Vien mounting he alle, be sue to aut he ih.
0) al the ee! motor by ug the reves order af he
removal proce,
esl motor blt
feel motor pulley
Fsimatoe
Fig tT
18, VIDEO HEAO DISC (Se Fis. 64-18, 44.19)
(1) Brak the solder connection af the PS fa wie (oat
vive ecanetad tothe MU cc board in video haat
frum‘.
(2) Renow the DEW su.
(cooton)
Do rot he the solar eomwction othe DEW sens, a5
i pevormance wil te impaied if sijeted 0 high
‘emporturs for an exter period of tne.
(3) Remove th sews 0}, and ile ing up vdeo hes
fru J, loin the WS Sten) with a Philip serene
fre, nd three vide heat aru 2
(a) Rerowe th sre fe) topeter with he rotary tans
{jxme backetsearing the oer tasformr.
{s) Bret these connection ofthe rotary ander
ead vires (1, (2), (lard), and then remove the
tranormer,
(caution)
Make nate of the sldr eannation locations foreach ot
the rotary ‘warsormer leadwire, When ranaving the
salar eannetns, donot leoe tha soldering on onthe
‘idea heed ternal far more than fv econ (ee Fi.
sata)
(8) Remove the sreas (which scare the wideo head
sand then ple the ise
(caution)
Pay attention tothe following points when vacng the
video ead die
"Ten eich ofthe sre (with an qual maute of
‘torque (gem Do not everignten hen,
Do not rameve te spear underaest the video be
ia, Inal the ae video hed ce rhton he old
‘poze ts psible hat theres no spacer
Solder the lsd whee in their orga potion, ond
postion them sc that they follow lng the eo! dis
nde nat ome in contac with rum A
(0) Assemble tte remaining parts inthe roves order of
(Caution)
‘The 1 srw ()etermine the poston of dren A 8
so tighten it wit toque of 1 gos.
(8) Play the agnment tape (V30088) or a previously
‘wcored ape a Tf thre are ary abnormalities inthe
picture djs the tracking. a normal pietre sil exo
be obtained, adj the tape path. (Refer to ite, TAPE
PATH ADJUSTMENTS).
{9) I sipping noe isha rom tho wtb fel dram
hen the tape played back, iis probably bese the
Video head drumset nstled propery aos he ens
(a) andthe M3 ren (0) again and au drm &
{couton)
1 the ping ni inher after the arts eet
indicate thot ty eae ira ire thickest ian
die: tur the gap adhsting sre fe) 37” = a0"
une loci rom the point st which th slipping
aie is ear (hen the gop acutng srewe(e)
‘ifr. Video bead ea
7, SLIP ROLLER ASSEMBLY AND BELT (See Fie
420)
(0) Ramove th FL, mechani smb eer item
2, PREPARATIONS FOR ADJUSTMENT)
(2) Rotate ‘he ip roller edly clocks, an lity
‘move the ext holder from the eomplteanet eet
bastion
(3) Remove the sre fs) hosing the worm cap, and then
‘emave the worm cap th bl, te 2 Sra waters 2, the
fl rallerssmmbly, ood te 3 Om waters?
(Caution)
the orm epi moved in the completed ease jet
sion thes lr sembly wl of
(4) Clean the shaft ofthe ip roller sembly witha lth
risen wth leool and then ply new (SUN XS)
{S) Roplsce te 30nmp waters, the ap rolerasenbly,
the 25mmo vier, de al, 2 the worm cop i Te
rovers grr of don,
(ceuton)
Do not mate tear of he vaste
* Use only he specid grea an te washer.
Molyeast ge, in patclar, will cause Frobloms iti
ames ona wth the war inal par 0G not it
ae cartel not otis os
(6) Rotate Be sip role asmbly counter dock, ané
‘move the caste hole tothe Eompleed vaste eect,
poston,
Washer 3.05
Fro lain
Fa 9420 18, FRONT LOROING MOTOR (See Fig. 4421)
(0) Remove the FL, mochanitn seb. Rte tem
2. PREPARATIONS FOR ADJUSTMENT.)
{a} fomove the Bek, and then By sig the hexagons!
‘wench (V0108 NZ) remove te allen se ling
the Frnt easing mazor pully.
(3) fave the 2 scons (e)holing the front losing
nator and remove ha ant aig mato
{ah Sount the new front lading mato i the reese
rer at mous
(caution)
‘Wher mounting the fot eeing motor ply, ads to
the ght how in Fg 4421
Paley of font
Tosding motor
5, ADIUSTIVENTS.
1. REEL BASE HEIGHT (See Fin 45:1)
It the reel ba eight isnot cect, te tap isd the
‘asete will te unevealy wound. When this tape i sed
Soi, the nezly woud tape wil cause the tape tension
a Mlcase, su comet tae path il be imposible to
obtain.
{1} Tuea of te power. (St he powar sich tothe OFF
postion)
(2) Remove te FL mechanism asarby. (Refer totem
2, PREPARAT ONS FOR ADJUSTMENT)
(3) trser he standard cases plate (V10105) ad side
‘hegege inthe deton ofthe ere
18) Confirm st, when he gouge 0p
rot in cotat with ures A ofthe
tact ih eure
(6) Ie et asin enna with surtac A, remove
spac an hak ai
eee sand
‘ate gue (V0 105 (6) 1 the ret bse notin contac with surface 8 689
space and hc sn
(war
Ado the el base eight by aig wr removing spaces
(O.15T, 0281, OST) as sopopriate so thatthe heaht
iets the sicatans Use the saa mathad fr both the
Take el ae red the suply ee tase.
2, BACK TENSION LEVER POSITION (Se Fig. #52)
Tho back tension must b apple uniformly tthe tape so
thatthe tape eon teel smonthiy with mlaion to he
arinurfesde andthe quid, I he back tain t00
‘rom, it wil cau the tp8 to stretch, and ft t00
‘wea, the Tape wl saparate fom the head and tape
ne.
(1) Turn ofthe power. [Sette power sith to he OFF
postion]
(2) amave th FL. mechan amy. (Refer t tam
2, PREPARATIONS FOR ADJUSTMENT)
{3} Manly operat te lnaing ng to rach the eon
tion of asia completion,
(a) wrt te bask tension adjutant gaug (V2.0120)
‘ngcheak te postin of the back eson pu
{8} ifthe postion ofthe back rnsion ule lent coe,
laosin the seew fl, move the bate band bracket, and
ju the postion ofthe back tension guide,
{6) Tohtan the screw (alto secure the poston ofthe
tale band baci.
(1) Mowe the lating sng tothe condition of urfoaing
tamplton, an intl the FL. canis sry
®
ake and
heactet,
ack
3. WINDING TORQUE (Sx Fis. 453~ 456)
{in he vrs modos ofthe VCR, the tape which asthe
supply fr tke) reel is wound around the ake up [or
suppl) fe. Ifthe wining torque I oo wes the pe
‘all at be wourd propery ard wil beam sack One
ther han he wining torques too srg, an exeuive
aout of zsin wil be applied tthe ape eau he
tape to sree
[FWD Winting (Rocoring, Payhac, Forward Seach)
Torque (Se Fi. 453)
(0) Tura of the power, (Se the poner vite tothe OFF
peton)
(2) Remove the FL, mechanism ably. (Ree 0 tom
2, PREPARATIONS FOR ADJUSTMENT)
(8) Tora o> the power. [Set the power suitch tthe ON
positon)
(4) Mount he reel teasion aug (V.038) on he oko up
ran bn, af then connec the string fo tha end of the
Spring ens gauge (VIOOT2)
(6) Pram tha PLAY button and mesaue the true, The
winding true sould be between 30 yn tg
(G) ithe renured value not within the ected value
fan, lathe tke pe ba
(0 sal he FL. mechanism aonb
Sprig teasion
ela
Tension gge fret
vss {F FWD Winding Torque (ee Fig. 454)
(1) Tum of the power. Sethe power suite othe OFF
past)
{2) Remove the... mechan asxmbly (Rater tiem
ZLPREPARATIONS FOR ADIUSTIENT)
6 Tum on the power. Ste pane site the OX
postion
{4 Mount the el eson gage (V0038 on th akeap
ral nd then connect the sting tothe endo the spring
tensionpage (VI 0014
(5) Pras the FFD bution, end mest the torque. The
edi orgue soul be 185 gor mare,
(6) UF te measure vali es tan the siting val,
heck or 2 problenwith te rel motor be, nd ple
{ebal ecrary,
(7) Iral'the FL machanim aby
Sri toion
7 en ia
Teosion gouge fol
wrote)
{EW Winding Torque] (Se Fi. 45.5)
{Tr oe pn. [5 hepato th OFF
(2) Remove to FL. mecha asambly,(Rete totem
2, PREPARATIONS FOR ADJUSTMENT)
1) Ton epee he poe nth oh ON
pasion,
(3) Mount there! tension gauge (¥0038) on he spy
tel and then connect the Sig 10 hy tp othe sin
tension gg 0010,
(5) Pes the REW button, and measure she trgu, The
ssinding torque oul be 189 oF mare
(6) i he reamed vl ieee tan the specie vale,
hock fr 2 peste wth the eel ator bl and teplace
thet itntesary
(7 rata ne
him eel,
Torsion 8 18 Sng ion
(vs00se) ste (016)
Fass [SEARCH Winding Torque] (See Fa. 455)
{n) Tum af th power. [Set the power site ta the OFF
postion!
{2} Remove the Fl. mechanism ase. (Refer to tm
2 PREPARATIONS FOR ADJUSTIENT.)
6 Tr on pvr OF
positon
{E) Mount the rel tension gage (V0038) onthe spay
foo an then connect th sig 10 the end of the sng
terion gouge (V30012 or VIO
[a] Pres the RSEARCH but, ahd meas the tore
“The winding worque Hou be between 85 g and 1208
Ue) Ine measure vali oot within the spciad vale
rang, replace the spp el bas
(Oy tl the EL mechanism sey,
Spring tension
srg (30012
rvonta)
“esin pose free
(wionse}
6, TAPE PATH ADJUSTMENTS
ach ofthe hess and tae ue as bean aut to he
precely core position end height, These puts have 3
tery tong lntuanee on tape path, and shout normaly
tot be tothe the wee tun the lara ha,
the eileen had te, have been replaced, plabick
the algnment tip (V0035) or previous reared wpe,
check the ae, Only thee ae preblem with he
noe that carat te coreted by ajuing the tacking
Ctl shoud tape path sjexments be made
‘so note tat tape path adusiments should be made
ithoutremovng the FL. mechanism asemby (only
ramove we op S00d 8)
4. BACK TENSION GUIDE VERTICAL POSITION {See
Fig 461)
11) raya tape on whic the edges are not seed, and
Check tht thes iso lores In both the uppe! end
lower wigs of the tape inthe ares of he back tension
ule,
fa) there isan loaves, st the srs) (50
thatthe asin pig evel f the ape
(vot)
Fcjosent fou the tape entering th tack tion guide
(Giteton A= A’) ied by sng sere (an ht for
tha tape levng the back terion guide (direction 8» B")
by wsng sre 2, FULL-ERASE HEAD TAPE GUIDES (See Figs 45:2 ~
458)
(1) Conoet an oscilosape ta the video output ena ick erin ude
(che chck terminal of eeuit boad VOT, and then
playback he lignan tape (0083).
(2) Check the tape pate thy ae ofthe Bok tension
tui. heres any Toosness in ether the pero lva
des ofthe tape, ast ape ues (bad (shat
‘he guide lege se notin contact. (S60 Fi. $8.2),
(3) Wile checkin the seavearm (enon), at tps
uid so that he lower tg ofthe ue soporte the
Tower wige ofthe tape Next, aut so thatthe ste of
amplitude A ofthe waveform approximaaly 648 (1/2
the st) in elton to the ee af mpltude B of the
lweefrm a 2 position approximately 25 from the head
‘thing pol. See Fi #63)
(8) leeching with the inpetion mor (¥20015),
aes up aie (ad () 2 tht te upper Hans art
the guts db ot enue any cree hte toe lowering —
Both ue) and guide (2 ely in ove ne |< =
thesieat amplitude A Se Fig. 464),
w haed
Emlope
iE Fig 463
Back tension ui
oe | te
Fo re i>