Internal Use Only

Website http://biz.lgservice.com

SERVICE MANUAL
CAR DVD RECEIVER
SERVICE MANUAL

MODEL : LAD4705R
MODEL : LAD4705R
CAUTION
BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS”
IN THIS MANUAL.

Control panel

P/NO : AFN33777099 JULY, 2007

 CONTENTS
SECTION 1 SUMMARY
SERVICING PRECAUTIONS .........................................................................................................................1-2
ESD PRECAUTIONS ......................................................................................................................................1-3
SPECIFICATIONS ...........................................................................................................................................1-4

SECTION 2 ELECTRICAL
ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS .................................................................2-1
1. SYSTEM CONTROL ERROR CORRECTION FLOW CHART...............................................................2-1
2. SOUND ERROR CORRECTION FLOW CHART ...................................................................................2-4
3. DISPLAY ERROR CORRECTION FLOW CHART .................................................................................2-9
4. TUNER ERROR CORRECTION FLOW CHART..................................................................................2-12
5. AUX ERROR CORRECTION FLOW CHART .......................................................................................2-14
6. DVD ERROR CORRECTION FLOW CHART.......................................................................................2-15
• WAVEFORMS .........................................................................................................................................2-19
INTERNAL BLOCK DIAGRAM OF ICs ......................................................................................................2-31
1. IC301 (HA13173AH) .............................................................................................................................2-31
2. IC401 (uPD78F1164) ............................................................................................................................2-33
3. IC403 (NJM2279M) ...............................................................................................................................2-37
4. IC601 (TDA7419) ..................................................................................................................................2-38
5. IC801 (TB2904HQ) ...............................................................................................................................2-40
6. IC901 (PT6523).....................................................................................................................................2-40
7. IC1502 (ES29LV320E) ..........................................................................................................................2-41
BLOCK DIAGRAMS......................................................................................................................................2-43
1. OVERALL BLOCK DIAGRAM...............................................................................................................2-43
2. DVD BLOCK DIAGRAM........................................................................................................................2-45
CIRCUIT DIAGRAMS ....................................................................................................................................2-47
1. MAIN-1 CIRCUIT DIAGRAM.................................................................................................................2-47
2. MAIN-2 CIRCUIT DIAGRAM.................................................................................................................2-49
3. FRONT CIRCUIT DIAGRAM.................................................................................................................2-51
4. DVD-1 CIRCUIT DIAGRAM ..................................................................................................................2-55
5. DVD-2 CIRCUIT DIAGRAM ..................................................................................................................2-57
6. DVD-3 CIRCUIT DIAGRAM ..................................................................................................................2-59
7. AUX CIRCUIT DIAGRAM......................................................................................................................2-61
8. LCD LIGHTING CIRCUIT DIAGRAM....................................................................................................2-62
PRINTED CIRCUIT BOARD DIAGRAMS ...................................................................................................2-63
1. MAIN P.C.BOARD .................................................................................................................................2-63
2. FRONT P.C.BOARD..............................................................................................................................2-65
3. DVD P.C.BOARD ..................................................................................................................................2-67
4. AUX P.C.BOARD...................................................................................................................................2-69
5. LCD LIGHTING P.C.BOARD.................................................................................................................2-69

SECTION 3 EXPLODED VIEWS

1. CABINET AND MAIN FRAME SECTION................................................................................................3-1
2. MECHANISM(PICK-UP) SECTION ........................................................................................................3-3

SECTION 4 REPLACEMENT PARTS LIST .................................................4-1

Copyright © 2007 LG Electronics. Inc. All right reserved. 1-1 LGE Internal Use Only
Only for training and service purposes
 SECTION 1 SUMMARY
SERVICING PRECAUTIONS
1. Always disconnect the power source before:

1) Removing or reinstalling any component, circuit board, module or any other instrument assembly.
2) Disconnecting or reconnecting any instrument electrical plug or other electrical connection.
3) Connecting a test substitute in parallel with an electrolytic capacitor in the instrument.
CAUTION: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an
explosion hazard.

2. Do not defeat any plug/socket B+ voltage interlocks with which instruments covered by this service
manual might be equipped.

3. Do not apply power to this instrument and or any of its electrical assemblies unless all solid-state
device heat sinks are correctly installed.

4. Always connect a test instrument’s ground lead to the instrument chassis ground before connecting
the test instrument positive lead. Always remove the test instrument ground lead last.

1) The service precautions are indicated or printed on the cabinet, chassis or components. When servicing,
follow the printed or indicated service precautions and service materials.
2) The Components used in the unit have a specified conflammability and dielectric strength. When replacing
any components, use components which have the same ratings. Components marked in the circuit diagram
are important for safety or for the characteristics of the unit. Always replace with the exact components.
3) An insulation tube or tape is sometimes used and some components are raised above the printed writing
board for safety. The internal wiring is sometimes clamped to prevent contact with heating components.
Install them as they were.
4) After servicing always check that the removed screws, components and wiring have been installed correctly
and that the portion around the service part has not been damaged. Further check the insulation between
the blades of attachment plug and accessible conductive parts.

LGE Internal Use Only 1-2 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
 ESD PRECAUTIONS
Electrostatically Sensitive Devices (ESD)
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components
commonly are called electrostatically sensitive devices (ESD). Examples of typical ESD devices are
integrated circuits and some field-effect transistors and semiconductor chip components. The following
techniques should be used to help reduce the incidence of component damage caused by static electricity.
1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain
off any electrostatic charge on your body by touching a know earth ground. Alternatively, obtain and
wear a commercially available discharging wrist strap device, which should be removed for potential
shock reasons prior to applying power to the unit under test.
2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive
surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static"
can generate electrical charges sufficient to damage ESD devices.
5. Do not use freon-propelled chemicals These can generate electrical charges sufficient to damage ESD
devices.
6. Do not remove a replacement ESD device from its protective package until immediately before you are
ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together
by conductive foam, aluminum foil or comparable conductive materials).
7. Immediately before removing the protective material from the leads of a replacement ESD device, touch
the protective material to the chassis or circuit assembly into which the device will by installed.
CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL
OTHER SAFETY PRECAUTIONS.

8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless
motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor
can generate static electricity sufficient to damage an ESD device).

CAUTION. GRAPHIC SYMBOLS

THE LIGHTNING FLASH WITH ARROWHEAD SYMBOL. WITHIN AN EQUILATERAL
TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE
OF UNINSULATED "DANGEROUS VOLTAGE" THAT MAY BE OF SUFFICIENT
MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.

THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENED TO

ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY
INFORMATION IN SERVICE LITERATURE.

Copyright © 2007 LG Electronics. Inc. All right reserved. 1-3 LGE Internal Use Only
Only for training and service purposes
 SPECIFICATIONS
• GENERAL
Output Power 50W x 4CH (Max.)
Power Source DC 12V
Speaker impedance 4Ω
Ground System Negative
Dimensions (W x H x D) 182 x 51 x 171mm (Without Front Panel)
Net Weight 1.5kg

• CD/DVD/VCD SECTION
Frequency Response 20Hz ~ 20kHz
S/N Ratio 85dB
Distortion 0.05%
Channel Separation (1kHz) 70dB

• RADIO SECTION
FM
Frequency Range 65 ~ 74, 87.5 ~ 108MHz
S/N Ratio 55dB
Distortion 0.7%
Usable Sensitivity 12dBµV

MW (AM)
Frequency Range 520 ~ 1720 or 522 ~ 1620kHz
S/N Ratio 45dB
Distortion 1.0%
Usable Sensitivity 28dBµV

• AUX SECTION
Frequency Response 20Hz ~ 20kHz
S/N Ratio 85dB
Distortion 0.05%
Channel Separation (1kHz) 45dB
Max Input Level (1kHz) 1.2V (35KΩ)

LGE Internal Use Only 1-4 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
 SECTION 2 ELECTRICAL
ELECTRICAL TROUBLESHOOTING GUIDE & WAVEFORMS
1. SYSTEM CONTROL ERROR CORRECTION FLOW CHART
Something wrong with
the system control?

1-A ~ 1-F

No power?

YES
NO
Checked the fuse? Inside of CN801, F801(10A)

YES

Checked the back up NO

CN801(16, 15, 14)
Vdd and Gnd, Acc?
YES

Checked the main NO

IC301(15, 14)
Micom Back up, Vdd?
YES

Checked the main NO

IC401(100, 99, 81, 30, 50, 47, 97, 20, 51)
Micom back up Gnd?
YES

Checked the main NO

IC402, IC401(90)
Micom reset?
YES

Checked the main NO

X401, X402
Micom X-tal?
YES
NO
Checked the ACC in? F301, Q301, Q302, IC401(38), CN801(14)

YES

Checked the NO
CN901(19), IC401(74)
detachable switch?
YES

Checked the front NO

CN901(14), IC401(21), Q316, Q317
panel VDD?
YES

Checked the front NO

IC401(52, 53)
panel switch input?
YES

OK

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-1 LGE Internal Use Only
Only for training and service purposes
 1-A

Not available to remocon?

YES

Checked the remocon NO

RMC1, R906
sens Vdd?
YES
NO
Checked the remocon CN901(5), IC401(5)
sens line?
YES

OK

1-B

Not available to volume control?

YES
NO
Checked the encoder volume? EV901, CN901(6, 7), IC401(40, 41)

YES
NO
Checked the volume IC401(1, 2), IC601(22, 23)
IC control?
YES

OK

1-C

Not available to key control?

YES
NO
Checked the tact switch? SW901 ~ SW918, EV901

YES
NO
Checked the key line? CN901(8, 9), IC401(52, 53)

YES

OK

LGE Internal Use Only 2-2 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
 1-D

Not available to telephone mute?

YES
NO
Checked the tel mute input? CN801(5), Q305,Q306, IC401(62)

YES
NO IC401(1, 2, 3, 6, 61), IC601(21, 22,23),
Checked the mute control? IC801(22), Q707, Q708, Q709, Q710

YES

OK

1-E

Not available to ANT(Motor Type) control?

YES

Checked the ANT

NO
CN801(10), IC302(4), IC401(63)
control?
YES

OK

1-F

Not available to remote(Power AMP) control?

YES
Checked the NO
CN801(6), IC301(12), IC401(87)
remote control?
YES

OK

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-3 LGE Internal Use Only
Only for training and service purposes
2. SOUND ERROR CORRECTION FLOW CHART
Something wrong with the sound?

2-A ~ 2-F

No sounds of all functions?

YES
NO
Checked the E-VR Vdd? IC601(24)

YES
NO
Checked the E-VR Ground? IC601(15)

YES

NO
Checked the E-VR control? IC601(22, 23), IC401(1, 2)

YES

Checked the E-VR NO

IC601(21), IC401(6)
mute control?

YES

Checked the E-VR NO

IC601(5, 6, 7, 8, 11, 13, 16, 17, 18, 19, 20)
signal in/out?
YES

Checked the NO
IC801(6, 20)
power IC Vdd?

YES

Checked the power NO

IC801(1, 2, 8, 13, 18, 24)
IC Ground?
YES

Checked the power NO

IC801(4, 22), IC401(3, 10)
IC Control?
YES

Checked the power NO

IC801(3, 5, 7, 9, 11, 12, 14, 15, 17, 19, 21, 23)
IC signal in/out?
YES

Checked the main NO

CN801(1, 2, 3, 4, 8, 9, 12, 13)
connector?

YES

OK

LGE Internal Use Only 2-4 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
 2-A

No REAR line out signal?

YES

Checked the line

NO
Q308, F303, IC701(8)
out AMP Vdd?

YES

Checked the line out NO

Q309, IC401(64)
AMP Vdd control?

YES

Checked the line NO

IC701(4)
out AMP Ground?

YES

Checked the line out NO

IC401(48), Q705, Q701, Q703
AMP mute contorl?

YES

Checked the line out NO

IC701(1, 2, 3, 5, 6, 7)
AMP signal in/out?

YES

OK

2-B

Hearing the Pop noise with TUNER function?

(RDS Model)
YES

Checked the NO IC401(1, 2, 3, 6, 61), IC601(21, 22,23),

mute control? IC801(22), Q707, Q708, Q709, Q710

YES
NO
Checked the AF mute? TU101(19), IC401(4)

YES

OK

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-5 LGE Internal Use Only
Only for training and service purposes
 2-C

No subwoofer line out signal?

YES

Checked the line NO

Q308, F303, IC702(8)
out AMP Vdd?

YES

Checked the line out NO

Q309, IC401(64)
AMP Vdd control?

YES

Checked the line

NO
IC702(4)
out AMP Ground?

YES

Checked the line out NO

IC401(48), Q705, Q701, Q703
AMP mute contorl?

YES

Checked the line out NO

IC702(1, 2, 3, 5, 6, 7)
AMP signal in/out?

YES

OK

2-D

No output Beep sound?

YES

Checked the NO
IC401(80), BU302
Beep control?

YES

OK

LGE Internal Use Only 2-6 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
 2-E

No RSE line out signal?

YES
NO
Checked the line Q308, F303, IC201(8)
out AMP Vdd?
YES

Checked the line out NO

Q309, IC401(64)
AMP Vdd control?

YES

Checked the line

NO
IC201(4)
out AMP Ground?

YES

Checked the line out NO

IC401(11), Q201, Q202, Q203
AMP mute contorl?

YES

Checked the line out NO

IC201(1, 2, 3, 5, 6, 7)
AMP signal in/out?

YES

OK

2-F

Hearing the Pop noise with RSE function?

YES

Checked the NO
IC401(11), Q201, Q202, Q203
mute control?

YES

OK

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-7 LGE Internal Use Only
Only for training and service purposes
 CAUTION - Tip for repair

Before exchange power amp IC(TB2904) for no audio problem, you have to check
below list.

1. Check VCC (pin 20, 6) & GND

C5

C3
1 20 6
TAB VCC1 VCC2
2. Check input pin 11, 12, 14, 15
OUT1 (+)
9
IN1
3. Check Standby, pin 4 C1
11 PW-GND1 8 RL

: Follow the below list. OUT1 ( - )

7

OUT2 (+)
4. Check Mute function, pin 22 5
IN2
: Follow the below list. C1
12 PW-GND2 2 RL

OUT2 ( - )
Stand-by Power Sound Voltage 3

ON OFF OFF 0 to 1.5 16 AC-GND

C6
OFF ON ON 3.5 to 6V
OUT3 (+)
17
IN3
15 PW-GND3 18 RL
C1
5. Check Ripple pin 10. OUT3 ( - )
19
: Normally it is high (about 10V)
OUT4 (+)
21
Mute Sound Voltage IN4
14 PW-GND4 24 RL
C1
ON OFF 0 to 1.5
OUT4 ( - )
23
OFF ON 3.5 to 6V
PRE-GND
13
OFF-SET
RIP STBY DET MUTE
5V
6. Re-soldering all the pin of IC. 10 4 25 22
PLAY
: Prevent crack of solder line. R1
MUTE
C2

C4

: PRE-GND
* Keep changed IC, We request that you send it to HQ. : PW-GND

Picture 1) Power IC desc.

LGE Internal Use Only 2-8 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. DISPLAY ERROR CORRECTION FLOW CHART
Something wrong with the display?

3-A ~ 3-C

No display or some display is broken?

YES

Checked the LCD NO

IC901(56)
driver Vdd?

YES

Checked the LCD NO

IC901(60)
driver Ground?

YES

Checked the LCD NO

IC901(57), CN901(11), IC401(75)
driver reset?

YES

Checked the LCD NO

IC901(61)
driver OSC?

YES

Checked the LCD NO IC401(76, 78, 79), CN901(3, 4, 10),

driver data interface? IC901(62, 63, 64)

YES

Checked the LCD NO

IC901(1 ~ 55), LCD
to LCD driver line?

YES

OK

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-9 LGE Internal Use Only
Only for training and service purposes
 3-A

Not available to illumination with button?

YES

Checked the dimmer NO

F302, CN801(11), IC401(66), IC301(9)
control input?

YES

NO
Checked the LED Vdd? IC301(4), CN901(13)

YES

NO
Checked the LED? LD901 ~ LD923

YES

OK

3-B

Don't moved level dancing bar?

YES

Checked the level NO

IC601(25, 26), IC401(9, 54)
meter signal Input?

YES

OK

LGE Internal Use Only 2-10 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
 3-C

Not avaliable to LCD lighting control?

YES

Checked the NO
F302, CN801(11), IC401(66), IC301(9)
dimmer control input?

YES

NO
Checked the LCD Vdd? IC301(4), Q320, Q322, CN901(12)

YES

Checked the LCD NO

IC401(58, 59), Q319, Q321
Vdd control?

YES

NO
Checked the LED? LD930 ~ LD931

YES

OK

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-11 LGE Internal Use Only
Only for training and service purposes
4. TUNER ERROR CORRECTION FLOW CHART
Something wrong with
the Tuner system?

4-A ~ 4-C

Not available to Tuner?

YES

Checked the NO
TU101(4, 16), Q307, IC301(10, 14)
Tuner Vdd?

YES

Checked the Tuner NO

IC401(39, 64), Q318, IC301(11)
Vdd control?

YES

Checked the Tuner NO

TU101(3, 10, 17)
Ground?

YES

NO
Checked the PLL data? TU101(11, 12, 13, 14, 15), IC401(44, 45, 46,)

YES

Checked the RF NO
TU101(1, 2)
signal in?

YES

Checked the mute NO

TU101(19), IC401(4)
control? (RDS Model)

YES

Checked the NO
TU101(6), IC401(69)
SD level?

YES

OK

LGE Internal Use Only 2-12 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
 4-A

Tuner no sound?

YES

Checked the Tuner NO

TU101(8, 9), IC601(5, 6)
signal out?
YES

Checked the mute?

NO
TU101(19), IC401(4)
(RDS model)
YES
NO
Checked the EVR See the sound error correction process.
& power AMP?
YES

OK

4-B

Not available to RDS function?

YES
Checked the NO
TU101(20, 21), IC401(65, 83)
RDS data?
YES

OK

4-C
only RDS model

Not available to AF?

YES
Checked the NO
TU101(7), IC401(55)
SMETER level?

YES

Checked the
NO
TU101(20, 21), IC401(65, 83)
RDS data?
YES

OK

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-13 LGE Internal Use Only
Only for training and service purposes
5. AUX ERROR CORRECTION FLOW CHART
Something wrong with
the Tuner system?

AUX no sound?

YES

Checked the AUX NO JK901, CN503,

signal input? CN901(15,17), IC601(11, 13)

YES

Checked the EVR NO

See the sound error correction process.
& power AMP?

YES

OK

LGE Internal Use Only 2-14 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
6. DVD ERROR CORRECTION FLOW CHART
Something wrong with the DVD system?

6-A ~ 6-E

Loading/Unloading?

YES
Checked the eject NO See the system error correction
key defect? process with the key control.
YES

Checked the loading NO

IC1202(1, 6)
motor IC Vdd?
YES

Checked the Load/ NO IC1202(7, 8, 2, 3)

Unload control? See Figure 9, 11
YES

Checked the Load/ NO CN1301(2, 4), SW1301, CN1202(13)

Unload SW? See Figure 10, 12
YES

Checked the NO IC1301(VDD33, VDD12, +3VA)

MPEG Vdd? See Figure 13
YES

Checked the NO IC1301 VSS (1, 23, 35, 46, 63, 81,
MPEG Ground? 100, 171, 180, 198, 208, 220, 234, 245)

YES

Checked the NO IC401(23), IC203(5, 6)

MPEG Reset? CN902(10) IC1301 NRST(101)
YES

Checked the NO X1301(1, 3)

MPEG X-tal? See Figure 14
YES

Checked the main NO IC401(84, 85, 86, 29), CN902(4, 5, 6, 7)

Micom data interface? IC1301(84, 85, 86, 87)
YES

Checked the main NO CN902(4, 5, 6, 7), CN1601(4, 5, 6, 7)

Micom data interface? See Figure 15
YES

Checked the disc NO

CN1301(2, 4)
in load switch?
YES

OK

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-15 LGE Internal Use Only
Only for training and service purposes
 6-A 6-B

Front LCD : No display

"INIT" display? on monitor?

YES YES

Checked the NO IC1301(VDD33, Checked the NO

Input voltage of VDD12, +3VA) MPEG Video signal IC1301(161)
MPEG IC? See Figure 13 out?

YES YES

IC1301 VSS (1, 23,

Checked the NO Check the Video NO IC1603(3, 5)
35, 46, 63, 81, 100,
GND condition of 171, 180, 198, 208, Amplifier Vcc, See Figure 30
MPEG IC? 220, 234, 235) GND?
YES YES

Checked NO IC401(23), NO IC1603(2, 4)

IC203(5, 6), CN902(10) Check the Video
the MPEG Amplifier In, See Figure 30
Reset? IC1301 NRST(101) Out?

YES YES

Check NO X1301(1, 3) Check the Video NO

the MPEG switching IC Vcc & IC403(6, 7, 8)
See Figure 14
X-tal? GND?

YES YES

Checked the NO IC401(84, 85, 86, 29), Check NO

the Video switching IC403(3, 4, 5)
main Micom data CN902(4, 5, 6, 7)
IC1301(84, 85, 86, 87) IC In, Out, mute See Figure 31, 32
interface? signal?
YES YES

Checked the NO CN902(4, 5, 6, 7) NO

Check the
main Micom data CN1601(4, 5, 6, 7) CN403(1,2)
RCA cable?
interface? See Figure 15

YES YES

OK OK

LGE Internal Use Only 2-16 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
 6-C

No reading &
"FILE CHECK"
display?
YES
YES

NO CN1202(13),
Checked the No Spindle
IC1301(75)
limit SW? motor operating?
See Figure 18
YES
YES

Checked the NO IC1201(22, 27,

Checked the NO IC1201(18) spindle driver 35, 42, 43)
motor DRV mute See Figure 19 IC Vdd?
control?
YES
YES

Checked the NO
Checked NO IC1201(10) IC1201(4, 16)
the focus spindle driver IC
See Figure 20 VHALF?
control?
YES
YES

Checked the NO
Checked the NO FMON0 IC1201(36, 38, 41)
focus error level out. spindle driver IC
See Figure 20 GND?
(FE Mon)?
YES
YES

Checked the NO IC1201(37, 39, 40)

Checked NO IC1201(9)
the tracking A1, A2, A3 of the See Figure 16
See Figure 21 driver IC?
control?
YES
YES

Checked NO IC1201(27~33)
Checked the NO FMON1 the hall Bias See Figure 17
tracking error level See Figure 21
out.(TE Mon) signals?

YES
YES

Checked Checked NO
NO CN1101(17) IC1201(5)
the RF signal the spindle motor
See Figure 22 control?
out check?
YES
YES

Checked NO OK
IC1201(1, 2, 3, 4)
the sled motor See Figure 23, 24
control?

YES

OK

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-17 LGE Internal Use Only
Only for training and service purposes
 6-D 6-E

No display on
DVD/CD no sound?
front monitor?

YES YES

Checked the NO IC1301 Check the NO CN403(4),

MPEG Audio DATA (172, 173, 174,175) parking brake Q415, IC401(12)
out? control?

YES YES

Checked NO IC1401(4, 5, 6, 9, 10) Checked NO

the DAC Vcc, the MPEG Video IC1301(161)
See Figure 25
Vdd, GND? signal out?

YES YES

Checked NO IC1401(1, 2, 3, 7, 8, 16) Check the NO IC1603(3, 5)

the DAC signal See Figure 26, 27 Video Amplifier See Figure 30
In/out? Vcc, GND?

YES YES

NO IC1301(178), Check the NO

Checked the IC1603(2, 4)
IC1401(11, 12) Video Amplifier
DAC mute? See Figure 30
See Figure 28 In, Out?

YES YES

Checked the NO IC1402(4, 8) Check the NO IC403(6, 7, 8)

OP AMP Vdd, Video switching IC
See Figure 29 Vcc & GND? See Figure 31
GND?

YES YES

NO Check the NO
Checked the IC1402(1, 2, 6, 7) Video switching IC403(3, 10, 11)
OP AMP signal See Figure 29 IC In, Out, mute See Figure 31, 32
in/out? signal?
YES YES

Checked the NO See a sound error Check the NO CN901(18)

E-VR & Power correction process. front video signal CN503(4)
AMP? path?

YES YES

OK Check the NO JK901, external

front video out connecto to monitor
Jack? video cable

YES

OK

LGE Internal Use Only 2-18 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
• WAVEFORMS
Figure 1 (Initial connecting the Main connector and supply of electric power)

CH1 X401

CH2 X402
CH3 IC401(10)
CH4 Back-Up 5V L403

Figure 2 (Power ON and started the front Micom control data)

CH1 CN401(2)

CH2 CN401(4)

CH3 CN401(5)

CH4 CN401(6)

Figure 3 (Front Micom control data)

CH1 CN401(2)

CH2 CN401(4)
CH3 CN401(5)

CH4 CN401(6)

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-19 LGE Internal Use Only
Only for training and service purposes
Figure 4 (The E-VR control data)

CH1 IC601(12)

CH2 IC601(13)

Figure 5 (The E-VR Level meter signal data, 1kHz)

CH1 IC601(14) SAIN

CH2 IC601(16) SAOUT

Figure 6 (The Tuner initial control)

CH1 TU101 CE1(15)

CH2 TU101 CLK(13)

CH3 TU101 DI(14)

CH4 TU101 DO(12)

LGE Internal Use Only 2-20 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 7 (The Tuner control data)

CH1 TU101 CE2(11)

CH2 TU101 CLK(13)

CH3 TU101 DI(14)

CH4 TU101 DO(12)

Figure 8 (The RDS data)

CH1 TU101 RDS CLK(20)

CH2 TU101 DATA(21)

Figure 9 (Loading motor control about loading condition)

CH1 IC1202(7)

CH2 IC1202(8)

CH3 IC1202(2)

CH4 IC1202(3)

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-21 LGE Internal Use Only
Only for training and service purposes
Figure 10 (Switch condition about loading)

CH1 CN1301(2)

CH2 CN1301(4)

CH3 CN1202(12)

CH4 SW1301

Figure 11 (Loading motor control about unloading condition)

CH1 IC1202(7)

CH2 IC1202(8)

CH3 IC1202(2)

CH4 IC1202(3)

Figure 12 (Switch condition about unloading)

CH1 CN1301(2)
CH2 CN1301(4)

CH3 CN1202(12)

CH4 SW1301

LGE Internal Use Only 2-22 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 13 (MPEG IC voltage condition when the battery & ACC start on)

CH1 IC1301(2,13,25,
36,48...)

CH2 IC1301(24,47,
103,167...)
CH3
IC1301(151,160,165)

CH4 IC1301(1,12,23,
35,46...)

Figure 14 (MPEG RESET when the battery & ACC start on)

CH1 L1604

CH2 CN1601(10)

CH3 X1301(1,3)

Figure 15 (SPI Interface)

CH1 CN1601(6)

CH2 CN1601(5)

CH3 CN1601(4)

CH4 CN1601(7)

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-23 LGE Internal Use Only
Only for training and service purposes
Figure 16 (Spindle motor driving signal SA1, SA2, SA3 when spindle motor is working)

CH1 IC1201(37)

CH2 IC1201(39)

CH3 IC1201(40)

Figure 17 (Hall sensor signal H1+, H2+, H3+ and SPD when spindle motor is working)

CH1 IC1201(6)

CH2 IC1201(27)
CH3 IC1201(29)

CH4 IC1201(31)

Figure 18 (Limit switch condition signal LDIN when disc in)

CH1 CN1202(13)

LGE Internal Use Only 2-24 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 19 (Motor driver mute signal STBY when spinup process)

CH1 IC1201(18)

Figure 20 (Focus driving out F+, F- and focus error FE when nominal state)

CH1 TP : FMON0

CH2 CN1101(1)

CH3 CN1101(4)

Figure 21 (Track driving out T+, T- and track error TE when nominal state)

CH1 TP:FMON1

CH2 CN1101(3)

CH3 CN1101(2)

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-25 LGE Internal Use Only
Only for training and service purposes
Figure 22 (RF Signal)

CH1 CN1101(17)

Figure 23 (Sled stepping motor driving signal SIN1, SIN2 when sled move to origin point)

CH1 IC1201(7)

CH2 IC1201(6)

LGE Internal Use Only 2-26 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 24 (Stepping motor phase signal A+, A-, B+, B- when sled move to origin point)

CH1 CN1201(2)

CH2 CN1201(3)

CH3 CN1201(1)

CH4 CN1201(4)

Figure 25 (Voltage condition about DAC IC)

CH1 IC1401(5)
CH2 IC1401(6)

CH3 IC1401(10)

CH4 IC1401(4,9)

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-27 LGE Internal Use Only
Only for training and service purposes
Figure 26 (DAC Control Signal / No DATA signal)

CH1 IC1401(1)

CH2 IC1401(2)

CH3 IC1401(3)

CH4 IC1401(16)

Figure 27 (DAC control signal / 1kHz sinewave)

CH1 IC1401(7)

CH2 IC1401(8)

Figure 28 (Audio mute / Track jump)

CH1 IC1401(2)

CH2 IC1401(8)

CH3 IC1401(11)

CH4 IC1301(178)

LGE Internal Use Only 2-28 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 29 (OPAMP / 1kHz sinewave)

CH1 IC1402(6)

CH2 IC1402(7)

CH3 IC1402(8)

CH4 IC1402(4)

Figure 30 (6dB Video amplifier)

CH1 IC1603(3)

CH2 IC1603(4)

CH3 IC1603(2)

CH4 IC1603(5)

Figure 31 (IC403 NJM2279M)

CH1 IC403(4)

CH2 IC403(3)

CH3 IC403(5)

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-29 LGE Internal Use Only
Only for training and service purposes
Figure 32 (IC403 NJM2279M / Mute ON)

CH1 IC403(4)
CH2 IC403(3)

CH3 IC403(5)

LGE Internal Use Only 2-30 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
 INTERNAL BLOCK DIAGRAM OF ICs
1. IC301 (HA13173AH)
1-1. BLOCK DIAGRAM

+B
VB DBUP C1
8 100uF
C2
0.1uF
Over voltage detect 15 VBUP
3.5V
CTL 1
11 CBUP
100uF
1.5V BIAS TSD
CTL 2
13
VREF
2.5V
CTL 3 VDDOUT
9 14

2.5V CVDD
10uF
CTL 4
5

2.5V DSPOUT
7
CDSP
DEXT1 EXTOUT 10uF
12
DEXT2 VREF CDOUT
CEXT 6
10uF CCD
VREF
ILMOUT 0.1uF
4
CILM
0.1uF
AUDIOOUT
10
FREG B
2 CAUDIO
10uF
QFREG 3 TAB
1
RFREG3
FREG F GND GND
CFREG RFREG1
10uF

RFREG2

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-31 LGE Internal Use Only
Only for training and service purposes
1-2. PIN FUNCTION (Note1)
Protection function
Pin No. Pin name Function Normal (Note2) (Note3) (Note3)
operation TSD On VB=24V VB=50V
1 GND Ground - - - -
2 FREG_B External Trs bass drive (Note4) On/Off On/Off Off Off
3 FREG_F FREG feedback terminal On/Off On/Off Off Off
4 ILMOUT 8.4V output for JLM/500mAmax On/Off Off Off Off
5 CTL4 FREG control terminal - - - -
6 CDOUT 8.0V output for CD/1.3Amax (Note4) On/Off Off Off Off
7 DSPOUT 3.3V output for DSP/250mAmax (Note4) On/Off Off Off Off
8 VB Battery - - - -
9 CTL3 ILM control terminal - - - -
10 AUDIOOUT 8.4V output for AUDIO/500mAmax (Note4) On/Off Off Off Off
11 CTL1 DSP, CD, Audio control terminal - - - -
12 EXTOUT High side output/600mAmax (Note4) On/Off Off Off Off
13 CTL2 EXT control terminal - - - -
14 VDDOUT 5.7V output for micro controller (Note4) On On On Off
15 VBUP Back up - - - -

Note1. In the uper table. “On” means always On. “Off” means compulsory Off and “On/Off” means that it can control by control
terminal.
Note2. Thermal protection circuit
A built-in thermal protection circuit (TSD:Thermal shut down) prevents thermal damage to the IC. All outputs except
VDD(pin14) and FREG (pin2&3) are switched off when the circuit operates, revert to the original state when the
temperature drops to a certain level.
Note3. Overvoltage protection circuit
The overvoltage protection circuit (surge protector) turns off all outputs without Vdd, when VB voltage is more than
about 21V. And the overvoltage protection circuit (surge protector) turns off Vdd output with other all outputs, when
VB voltage is more than about 26V. When the overvoltage protection operates on VB>=18V condition, the stand by
current increases.
Note 4. Overcurrent protection circuit
FREG_B (pin2), ILMOUT (pin4), CDOUT (pin6), DSPOUT (pin7), AUDIOOUT (pin10), EXITOUT (pin12), VDDOUT
(pin14) output circuits are built-in overcurrent protection circuit based on the respective output current. These
overcurrent protection circuits limit the current with a curve shape of “7” in the voltage-current graph. This prevents IC
destruction due to overcurrent.

LGE Internal Use Only 2-32 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
2. IC401 (uPD78F1164)
2-1. PIN CONFIGURATION

uPD78F1164

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-33 LGE Internal Use Only
Only for training and service purposes
2-2. PIN DESCRIPTION
Pin No Name I/O Description
1 PEV_CLK O Clock for interface with volume controller(IC601 13pin)
2 PEV_DO O To volume controller, data output(IC601 12pin)
3 PPWR_MUTE O Power AMP. Direct Mute Control Output(IC801 27pin)
4 PAF_MUTE O Tuner AFS Port for AF Mute(TU101 14pin)
5 PRMC I Remote controller input
6 PSOFT_MUTE O Volume I.C Direct volume mute signal output(IC601 15pin)
7 N.C. O Not to be used
8 N.C. O Not to be used
9 PEV_SACLK O volume I.C Spectrum Analyzer Clock output(IC601 16pin)
10 PSTANDBY O Power AMP. Standby Control Output(IC801 27pin)
RSE audio Mute Control Output(Q201)
11 PDUAL_MUTE O
Only LAD4700

DVD Vdd Control

12 PDVD_PICKUP_PWR O 1. DVD Pickup 5V control output
2. DVD Motor 8V control output
13 PHAND_BREAK I Hand Break signal inputOnly LAD4700
14 PDVD_POWER O DVD system Vdd control output(IC304 4pin)
Front Video Signal mute control output
15 PVIDEO_F_MUTE O
Only LAD4700
16 PVIDEO_R_MUTE O Rear Video Signal mute control output
17 PFAN O Fan control output(Q402)
18 N.C. O Not to be used
19 N.C. O Not to be used
20 EVss1 Connect to GND
Front 5V control output(Q313)
21 PFRT_PWR O
Power control output for front panel
22 N.C. O Not to be used
23 PDVD_RST O DVD MPEG reset control(IC203 5pin)
24 PZERO_MUTE I DVD/CD zero mute signal input
25 N.C. O Not to be used
26 N.C. O Not to be used
27 N.C. O Not to be used
28 N.C. O Not to be used
29 PDVD_CE O DVD MPEG CE control(IC203 2pin)
30 EVdd1 I Positive power supply (+5V)
31 PDVD33 O DVD MPEG 3.3V Vdd on/off control output(Q304)
32 POPT_IN0 I For diode option check, signal 1 or 2 input0
33 POPT_IN1 I For diode option check, signal 1 or 2 input1
34 POPT_IN2 I For diode option check, signal 1 or 2 input2
35 POPT_OUT0 O For diode option check, signal 1 output
36 POPT_OUT1 O For diode option check, signal 2 output
37 POPT_OUT2 O For diode option check, signal 3 output
LGE Internal Use Only 2-34 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Pin No Name I/O Description

TUNER BAND OPTION

D401 D402 D403 AREA STEP
X X X OIRT/ RE 50K/ 9K
100K < - > 50K
X O LX LATIN/RD
10K <- > 9K
O X X ASIA/RC 100K/9K
O O X EUROPE/EW5/ RI 50K/ 9K
X X O EUROPE(LW)
X O O USA
D404 O RDS SEEK PI
D405 O LAD4710 DISPLAY
D406 O RDS ON
D407 O LAD4750 DISPLAY

38 PACC I ACC Control Input(Q301)

39 PAUDIO_PWR O Regulator Audio(Tuner and E-VR) 8.4V ON Control Output(IC301 11pin)
40 PVOLA O Volume rotary encoder A terminal signal input
41 PVOLB O Volume rotary encoder B terminal signal input
42 PBAT_CHK I Backup level detect input
43 N.C. I Not to be used
44 PPLL_DO O To PLL IC, data input(TU101 12pin)
45 PPLL_DI I From PLL IC, data output(TU101 14pin)
46 PPLL_CLK O Clock output for interface with PLL IC(TU101 13pin)
47 Avref I Reference voltage applied to D/A converter
48 PLINE_MUTE O LINE-OUT MUTE ON/OFF Control(Q705)
Wired remocon H/L selection input
49 RTPD I Only LAD4750
50 Avref0 I Reference voltage applied to D/A converter
51 Avss - GND
52 PKEY1 I Key 1st line signal input
53 PKEY2 I Key 2nd line signal input
54 PLVL_METER I Volume I.C Spectrum Analyzer Analog Level Input(IC601 14pin)
55 PS_MTR I Radio station's strength signal input(TU101 7pin)
56 PQUALTY I Radio station's strength signal input(TU101 18pin)
Wired Remocon RTPA Key Input.
57 RTPA I Only LAD4750
58 PLIGHT O Front LCD back light On/Off Control Output(Q319)
59 PDIMMER O Dimmer Control output for LCD back light
60 PAUX_MUTE O AUX mute control output, Only Option
61 PAUDIO_MUTE O System Audio Mute Control Output(Q706)
62 PTEL_MUTE O Tuner Signal Out Mute Control(Q305)
63 PANT O Antenna control output(IC302 1pin)

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-35 LGE Internal Use Only
Only for training and service purposes
Pin No Name I/O Description
Power on control
1. Line out B+ on/off control(Q309)
64 PPWR O
2. Illumination On/off control(IC301 9Pin)
3. Tuner 5V control control(Q318)

65 PRDS_DI I From tuner pack, RDS data input(TU101 21Pin)

66 PDIM_IN I Dimmer input
67 PEEPROM_CE O CE1 Control with EEPROM Chip select(TU101 15Pin)
68 PPLL_CE O CE2 with PLL chip select(TU101 11Pin)
69 PPSD_ST I SD level & ST input from Tuner pack(TU101 5Pin)
70 PART_EN I ART Enable input, only Auto test equipment
71 PART_RX I Data input for ART, only Auto test equipment
72 PART_TX O Data output for ART, only Auto test equipment
73 N.C. O Not to be used
74 PFRT_DETECT I Front Panel detaching or attaching detect
75 PFRT_RST O Front LCD driver reset
76 PFRT_DO O Data output to Front LCD driver
77 PDISC_IN I Wake up signal input from DVD Mecha with Disc in
78 PFRT_CLK O CLK output to Front LCD driver
79 PFRT_CE I Data enable output to Front LCD driver
80 PBEEP O Buzzer output
81 PEXLVI I Low voltage detector(Connect to Vdd)
82 N.C. I Not to be used
83 PRDS_CLK I From tuner pack, RDS clock input(TU101 20Pin)
84 PDVD_DO O Data output for DVD
85 PDVD_DI I Data input of DVD
86 PDVD_CLK I CLK input of DVD
87 PREMOTE O External amp on(IC301 13Pin)
88 Download_CLK - CLK for Program upgrade
89 Download_IO - Data I/O for flash memory programmer(Pull-up register)
90 RESET - System reset input
91 SUB CLK I Sub clock 32.768 KHz
92 SUB CLK O Sub clock 32.768 KHz
93 FLMOD - Flash memory programming mode setting
94 MAIN CLK I X’tal 19.2 MHz
95 MAIN CLK O X’tal 19.2 MHz
96 REGC - Connect to VSS via a capacitor
97 Vss - Ground
98 Evss - Ground Potential for Ports
99 Vdd I Positive power supply (+5V)
100 Evdd I Positive power supply (+5V) For Ports

LGE Internal Use Only 2-36 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. IC403 (NJM2279M)
3-1. PIN CONFIGURATION

14 13 12 11 10 9 8

PIN FUNCTION
1
1. Vin3 8. V+
2. SW1 9. N. C.
3. Vin2 10. Vout1
4. MUTE2 11. MUTE1
2 5. Vout2 12. Vin1
6. GND2 13. SW2
7. GND1 14. V-

1 2 3 4 5 6 7

3-2. BLOCK DIAGRAM

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-37 LGE Internal Use Only
Only for training and service purposes
4. IC601 (TDA7419)
4-1. PIN CONFIGURATION

ACOUTR/AC2OUTR 1 28 MIX/OUTSW/OUTRR2
ACINR/FILOR 2 27 VREF
ACINL/FILOL 3 26 SAOUT
ACOUTL/AC2OUTL 4 25 SAIN
SE3L/ACINL 5 24 VDD
SE3R/ACINR 6 23 SDA
SE2L 7 22 SCL
SE2R 8 21 MUTE
SE1L 9 20 OUTLF
SE1R 10 19 OUTLR
DIFFL 11 18 OUTRR
DIFFG 12 17 OUTRF
DIFFR 13 16 OUTSW/OUTLR2
CREF 14 15 GND
D04AU1569

4-2. BLOCK DIAGRAM

ACOUTL/ ACOUTR/ ACINL/ ACINR/

SAOUT SACLK MUTE AC2OUTL AC2OUTR FILOL FILOR

Spectrum
Analyzer

DIFFL

DIFFG
Softstep
HPF OUTLF
InGain Softstep MonoFader Mix
DIFFR Loudness SoftMute Treble Middle Bass
AutoZero Volume

SE1L
Softstep HPF OUTRF
Mix
INPUT MonoFader
SE1R
MULTIPLEXER
SE2L Softstep OUTLR
InGain MonoFader
SE2R

Softstep OUTRR
MonoFader

OUTSW/
Subwoofer Softstep OUTLR2
LPF MonoFader

MIX/
OUTSW/
Softstep OUTRR2
MonoFader

SUPPLY DIGITAL CONTROL I2C BUS

VDD GND CREF VREFOUTF AC2INL/ AC2INR/

SCL SDA
SE3L SE3R

LGE Internal Use Only 2-38 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4-3. PIN DESCRIPTION
Pin
Pin Name Function I/O
N#
1 ACOUTR / AC2OUTR AC coupling right output / HPF filter AC2OUT right channel O
2 ACINR / FILOR AC coupling right input / HPFfilter FILO right channel I/O
3 ACINL / FILOL AC coupling left input / HPF filter FILO left channel I/O
4 ACOUTL / AC2OUTL AC coupling left output / HPF filter AC2OUT left channel O
5 SE3L / ACINL Single-ended input 3 left channel / AC coupling left input I
6 SE3R / ACINR Single-ended input 3 right channel / AC coupling right input I
7 SE2L Single-ended input 2 left channel I
8 SE2R Single-ended input 2 right channel I
9 SE1L Single-ended input 1 left channel I
10 SE1R Single-ended input 1 Right channel I
11 DIFFL Pseudo differential stereo input left I
12 DIFFG Pseudo differential stereo input common I
13 DIFFR Pseudo differential stereo input right I
14 CREF Reference capacitor O
15 GND Ground S
16 OUTSW / OUTLR2 Subwoofer output / 2nd rear left output O
17 OUTRF Front right output O
18 OUTRR Rear right output O
19 OUTLR Rear left output O
20 OUTLF Front left output O
21 MUTE External mute pin I
22 SCL I2C bus clock I
23 SDA I2C bus data I/O
24 VDD Supply S
25 SAIN Spectrum analyzer clock input I
26 SAOUT Spectrum analyzer output O
27 VREF Vref output O
28 MIX / OUTSW / OUTRR2 Mix input / Additional subwoofer output / 2nd rear right output I/O

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-39 LGE Internal Use Only
Only for training and service purposes
5. IC801 (TB2904HQ)
5-1. BLOCK DIAGRAM

C5

C3
1 20 6
TAB VCC1 VCC2

OUT1 (+)
9
IN1
11 PW-GND1 8 RL
C1
OUT1 ( - )
7

OUT2 (+)
5
IN2
12 PW-GND2 2 RL
C1

OUT2 ( - )
3

16 AC-GND
C6

OUT3 (+)
17
IN3
15 PW-GND3 18 RL
C1
OUT3 ( - )
19

OUT4 (+)
21
IN4
14 PW-GND4 24 RL
C1

OUT4 ( - )
23

PRE-GND
13
OFF-SET
RIP STBY DET MUTE
5V
10 4 25 22
PLAY
R1
MUTE
C2

C4

: PRE-GND

: PW-GND

6. IC901 (PT6523)
6-1. PIN CONFIGURATION
SG47

SG46

SG45

SG42

SG37
SG48

SG44

SG43

SG41

SG40

SG39

SG38

SG36

SG35

SG34

SG33
38

33
47

40

35
48

46

45

44

43

42

41

39

37

36

34

SG49 49 32 SG32
SG50 50 31 SG31
SG51 51 30 SG30
SG52 52 29 SG29
COM1 53 28 SG28

COM2 54 27 SG27
COM3 55 26 SG26
VDD 56 25 SG25
INH 57 24 SG24
VDD1 58 23 SG23

VDD2 59 22 SG22

VSS 60 21 SG21
OSC 61 20 SG20
CE 62 19 SG19

CLK 63 18 SG18

DI 64 17 SG17
10

11

12

13

14

15

16
1

9
SG1

SG5
SG2

SG3

SG4

SG6

SG7

SG8

SG9

SG10

SG11

SG12

SG13

SG14

SG15

SG16

LGE Internal Use Only 2-40 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
7. IC1502 (ES29LV320E)
7-1. PIN CONFIGURATION

A15 1 48 A16
A14 2 47 BYTE#
A13 3 46 Vss
A12 4 45 DQ15/A-1
A11 5 44 DQ7
A10 6 48-Pin Standard TSOP 43 DQ14
A9 7 42 DQ6
A8 8 41 DQ13
A19 9 40 DQ5
A20 10 39 DQ12
WE# 11 38 DQ4
RESET# 12 37 Vcc
NC 13 ES29LV320E 36 DQ11
WP#/ACC 14 35 DQ3
RY/BY# 15 34 DQ10
A18 16 33 DQ2
A17 17 32 DQ9
A7 18 31 DQ1
A6 19 30 DQ8
A5 20 29 DQ0
A4 21 28 OE#
A3 22 27 Vss
A2 23 26 CE#
A1 24 25 A0

7-2. BLOCK DIAGRAM

RY/BY#

Vcc Vcc Detector Timer/

Counter DQ0-DQ15(A-1)
Vss

Analog Bias
Generator
Input/Output
Buffers
WE# Command Write
Register State
RESET# Machine

Data Latch/
Sense Amps
Sector Switches

Y-Decoder Y-Decoder
A<0:20>
Address Latch

CE# X-Decoder Cell Array

Chip Enable
OE# Output Enable
Logic
BYTE#

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-41 LGE Internal Use Only
Only for training and service purposes
7-3. PIN DESCRIPTION

Pin Description
A0-A20 21 Addresses

DQ0-DQ14 15 Data Inputs/Outputs

DQ15 (Data Input/Output, Word Mode)

DQ15/A-1
A-1 (LSB Address Input, Byte Mode)

CE# Chip Enable

OE# Output Enable

WE# Write Enable

WP#/ACC Hardware Write Protect/Acceleration Pin

RESET# Hardware Reset Pin, Active Low

BYTE# Selects 8-bit or 16-bit mode

RY/BY# Ready/Busy Output

3.0 volt-only single power supply

Vcc
(see Product Selector Guide for speed options and voltage supply tolerances)

Vss Device Ground

NC Pin Not Connected Internally

LGE Internal Use Only 2-42 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
BLOCK DIAGRAMS
1. OVERALL BLOCK DIAGRAM

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-43 2-44 LGE Internal Use Only
Only for training and service purposes
2. DVD BLOCK DIAGRAM

LGE Internal Use Only 2-45 2-46 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CIRCUIT DIAGRAMS
1. MAIN-1 CIRCUIT DIAGRAM

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-47 2-48 LGE Internal Use Only
Only for training and service purposes
2. MAIN-2 CIRCUIT DIAGRAM

LGE Internal Use Only 2-49 2-50 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. FRONT CIRCUIT DIAGRAM
• MODEL LAD4700(R)/4705(R)

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-51 2-52 LGE Internal Use Only
Only for training and service purposes
FRONT CIRCUIT DIAGRAM
• MODEL LAD4710(R)

LGE Internal Use Only 2-53 2-54 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. DVD-1 CIRCUIT DIAGRAM

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-55 2-56 LGE Internal Use Only
Only for training and service purposes
5. DVD-2 CIRCUIT DIAGRAM

LGE Internal Use Only 2-57 2-58 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
6. DVD-3 CIRCUIT DIAGRAM

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-59 2-60 LGE Internal Use Only
Only for training and service purposes
7. AUX CIRCUIT DIAGRAM 8. LCD LIGHTING CIRCUIT DIAGRAM

LGE Internal Use Only 2-61 2-62 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
PRINTED CIRCUIT BAORD DIAGRAMS
1. MAIN P.C.BOARD
(TOP VIEW) (BOTTOM VIEW)

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-63 2-64 LGE Internal Use Only
Only for training and service purposes
2. FRONT P.C.BOARD
• MODEL LAD4700(R)/4705(R)
(TOP VIEW) (BOTTOM VIEW)

• MODEL LAD4710(R)
(TOP VIEW) (BOTTOM VIEW)

LGE Internal Use Only 2-65 2-66 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. DVD P.C.BOARD
(TOP VIEW) (BOTTOM VIEW)

Copyright © 2007 LG Electronics. Inc. All right reserved. 2-67 2-68 LGE Internal Use Only
Only for training and service purposes
 MEMO
4. AUX P.C.BOARD

5. LCD LIGHTING P.C.BOARD

LGE Internal Use Only 2-69 2-70 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
SECTION 3 EXPLODED VIEWS
1. CABINET AND MAIN FRAME SECTION
298 Accessory

451 Loc.No. 801 Loc.No. 808

263

A45

453
A43 A26
Loc.No. 818 Loc.No. 835
278
268
269 262 CABLE1

LCD1 A41
A50 A49 DVD
267
Loc.No. 836 Loc.No. 850
A44 460
275 266 CABLE2
260 274 279
270 285 281
282 451
288 261 284 277 451
451
280 Loc.No. 900
273 265 451
451 295
276
451
264
272 A46 299
271

255 289
283 258 291 296
454 290
251
MAIN 455
451 FAN1
452 297
456
453 451
257
451
256 452
254
451
253
252
250 A42

293

292
294

Copyright © 2007 LG Electronics. Inc. All right reserved. 3-1 3-2 LGE Internal Use Only
Only for training and service purposes
 MEMO
2. MECHANISM(PICK-UP) SECTION

A03

LGE Internal Use Only 3-3 3-4 Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes