LG LAD4700R Service manual

CAR DVD RECEIVER

SERVICE MANUAL

MODEL : LAD4700R

CAUTION

BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL

.

MODEL : LAD4700R

SERVICE MANUAL

Control panel

P/NO : AFN33777084 JUNE, 2007

Website http://biz.lgservice.com

Internal Use Only

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

1-1

LGE Internal Use Only

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

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.

1-3

LGE Internal Use Only

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

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?

No power?

YES

Checked the fuse?

YES

Checked the back up

Vdd and Gnd, Acc?

YES

Checked the main

Micom Back up, Vdd?

YES

Checked the main

Micom back up Gnd?

YES

Checked the main

Micom reset?

YES

NO

1-A

IC401(100, 99, 81, 30, 50, 47, 97, 20, 51)

1-F

~

Inside of CN801, F801(10A)

CN801(16, 15, 14)

IC301(15, 14)

IC402, IC401(90)

Checked the main

Micom X-tal?

YES

Checked the ACC in?

YES

Checked the

detachable switch?

YES

Checked the front

panel VDD?

YES

Checked the front

panel switch input?

YES

OK

NO

2-1

X401, X402

F301, Q301, Q302, IC401(38), CN801(14)

CN901(19), IC401(74)

CN901(14), IC401(21), Q316, Q317

IC401(52, 53)

LGE Internal Use Only

1-A

Not available to remocon?

YES

Checked the remocon

sens Vdd?

YES

Checked the remocon

sens line?

YES

OK

1-B

Not available to volume control?

YES

Checked the encoder volume?

NO

RMC1, R906

CN901(5), IC401(5)

EV901, CN901(6, 7), IC401(40, 41)

YES

Checked the volume

IC control?

YES

OK

1-C

Not available to key control?

YES

Checked the tact switch?

YES

Checked the key line?

YES

OK

NO

IC401(1, 2), IC601(22, 23)

SW901 ~ SW918, EV901

CN901(8, 9), IC401(52, 53)

LGE Internal Use Only

2-2

Only for training and service purposes

1-D

Not available to telephone mute?

YES

Checked the tel mute input?

YES

Checked the mute control?

YES

OK

1-E

Not available to ANT(Motor Type) control?

NO

CN801(5), Q305,Q306, IC401(62)

IC401(1, 2, 3, 6, 61), IC601(21, 22,23),

IC801(22), Q707, Q708, Q709, Q710

YES

Checked the ANT

control?

YES

OK

1-F

Not available to remote(Power AMP) control?

YES

Checked the

remote control?

YES

OK

NO

CN801(10), IC302(4), IC401(63)

CN801(6), IC301(12), IC401(87)

2-3

LGE Internal Use Only

2. SOUND ERROR CORRECTION FLOW CHART

Something wrong with the sound?

No sounds of all functions?

YES

Checked the E-VR Vdd?

YES

Checked the E-VR Ground?

YES

Checked the E-VR control?

YES

Checked the E-VR

mute control?

YES

Checked the E-VR

signal in/out?

YES

NO

2-A

IC601(5, 6, 7, 8, 11, 13, 16, 17, 18, 19, 20)

2-F

~

IC601(24)

IC601(15)

IC601(22, 23), IC401(1, 2)

IC601(21), IC401(6)

Checked the power

Checked the main

LGE Internal Use Only

Checked the

power IC Vdd?

YES

IC Ground?

YES

IC Control?

YES

IC signal in/out?

YES

connector?

YES

OK

NO

2-4

IC801(6, 20)

IC801(1, 2, 8, 13, 18, 24)

IC801(4, 22), IC401(3, 10)

IC801(3, 5, 7, 9, 11, 12, 14, 15, 17, 19, 21, 23)

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

Only for training and service purposes

2-A

No REAR line out signal?

YES

Checked the line

out AMP Vdd?

YES

Checked the line out

AMP Vdd control?

YES

Checked the line

out AMP Ground?

YES

Checked the line out

AMP mute contorl?

YES

Checked the line out

AMP signal in/out?

YES

OK

NO

Q308, F303, IC701(8)

Q309, IC401(64)

IC701(4)

IC401(48), Q705, Q701, Q703

IC701(1, 2, 3, 5, 6, 7)

2-B

Hearing the Pop noise with TUNER function?

(RDS Model)

YES

Checked the

mute control?

YES

Checked the AF mute?

YES

OK

NO

2-5

IC401(1, 2, 3, 6, 61), IC601(21, 22,23),

IC801(22), Q707, Q708, Q709, Q710

TU101(19), IC401(4)

LGE Internal Use Only

2-C

No subwoofer line out signal?

YES

Checked the line

out AMP Vdd?

YES

Checked the line out

AMP Vdd control?

YES

Checked the line

out AMP Ground?

YES

Checked the line out

AMP mute contorl?

YES

Checked the line out

AMP signal in/out?

YES

OK

NO

Q308, F303, IC702(8)

Q309, IC401(64)

IC702(4)

IC401(48), Q705, Q701, Q703

IC702(1, 2, 3, 5, 6, 7)

No output Beep sound?

LGE Internal Use Only

2-D

YES

Checked the

Beep control?

YES

OK

NO

2-6

IC401(80), BU302

Only for training and service purposes

2-E

No RSE line out signal?

YES

Checked the line

out AMP Vdd?

YES

Checked the line out

AMP Vdd control?

YES

Checked the line

out AMP Ground?

YES

Checked the line out

AMP mute contorl?

YES

Checked the line out

AMP signal in/out?

YES

OK

NO

Q308, F303, IC201(8)

Q309, IC401(64)

IC201(4)

IC401(11), Q201, Q202, Q203

IC201(1, 2, 3, 5, 6, 7)

2-F

Hearing the Pop noise with RSE function?

YES

Checked the

mute control?

YES

OK

NO

2-7

IC401(11), Q201, Q202, Q203

LGE Internal Use Only

CAUTION - Tip for repair

A

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

below list.

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

2. Check input pin 11, 12, 14, 15

3. Check Standby, pin 4

: Follow the below list.

4. Check Mute function, pin 22

: Follow the below list.

Stand-by Power Sound Voltage

ON OFF OFF 0 to 1.5

OFF ON ON 3.5 to 6V

5. Check Ripple pin 10.

: Normally it is high (about 10V)

Mute Sound Voltage

ON OFF 0 to 1.5

OFF ON 3.5 to 6V

6. Re-soldering all the pin of IC.

: Prevent crack of solder line.

* Keep changed IC, We request that you send it to HQ.

C1

C6

C1

PRE-GND

1 20 6

TAB V

IN1

11

IN2

12

C-GND

16

IN3

15

IN4

14

13

STBYRIP

10 25 22

2

C

4

CC1VCC2

OFF-SET

DET

OUT1

()

PW-GND1

OUT1 ( )

OUT2 ( )

PW-GND2

OUT2 ( )

OUT3 ( )

PW-GND3

OUT3 ( )

OUT4 ( )

PW-GND4

OUT4 ( )

MUTE

4

C

3

5

C

+

9

8

7

+

5

2

3

+

17

18

-

19

+

21

24

-

23

R

1

R

L

R

L

R

L

R

L

5 V

PLAY

MUTE

: PRE-GND

: PW-GND

Picture 1) Power IC desc.

LGE Internal Use Only

2-8

Only for training and service purposes

3. DISPLAY ERROR CORRECTION FLOW CHART

Something wrong with the display?

No display or some display is broken?

YES

Checked the LCD

driver Vdd?

YES

Checked the LCD

driver Ground?

YES

Checked the LCD

driver reset?

YES

Checked the LCD

driver OSC?

YES

Checked the LCD

driver data interface?

NO

3-A

3-C

~

IC901(56)

IC901(60)

IC901(57), CN901(11), IC401(75)

IC901(61)

IC401(76, 78, 79), CN901(3, 4, 10),

IC901(62, 63, 64)

YES

Checked the LCD

to LCD driver line?

YES

OK

NO

2-9

IC901(1 ~ 55), LCD

LGE Internal Use Only

3-A

Not available to illumination with button?

YES

Checked the dimmer

control input?

YES

Checked the LED Vdd?

YES

Checked the LED?

YES

OK

3-B

Don't moved level dancing bar?

YES

NO

F302, CN801(11), IC401(66), IC301(9)

IC301(4), CN901(13)

LD901 ~ LD923

Checked the level

meter signal Input?

LGE Internal Use Only

OK

YES

NO

2-10

IC601(25, 26), IC401(9, 54)

Only for training and service purposes

3-C

Not avaliable to LCD lighting control?

YES

Checked the

dimmer control input?

YES

Checked the LCD Vdd?

YES

Checked the LCD

Vdd control?

YES

Checked the LED?

YES

OK

NO

F302, CN801(11), IC401(66), IC301(9)

IC301(4), Q320, Q322, CN901(12)

IC401(58, 59), Q319, Q321

LD930 ~ LD931

2-11

LGE Internal Use Only

4. TUNER ERROR CORRECTION FLOW CHART

Something wrong with

the Tuner system?

Not available to Tuner?

YES

Checked the

Tuner Vdd?

YES

Checked the Tuner

Vdd control?

YES

Checked the Tuner

Ground?

YES

Checked the PLL data?

YES

Checked the RF

signal in?

NO

4-A

TU101(11, 12, 13, 14, 15), IC401(44, 45, 46,)

4-C

~

TU101(4, 16), Q307, IC301(10, 14)

IC401(39, 64), Q318, IC301(11)

TU101(3, 10, 17)

TU101(1, 2)

Checked the mute

control? (RDS Model)

LGE Internal Use Only

YES

Checked the

SD level?

YES

OK

NO

2-12

TU101(19), IC401(4)

TU101(6), IC401(69)

Only for training and service purposes

4-A

Tuner no sound?

YES

Checked the Tuner

signal out?

YES

Checked the mute?

(RDS model)

YES

Checked the EVR

& power AMP?

YES

OK

4-B

NO

TU101(8, 9), IC601(5, 6)

TU101(19), IC401(4)

See the sound error correction process.

Not available to RDS function?

YES

Checked the

RDS data?

YES

OK

4-C

only RDS model

Not available to AF?

YES

Checked the

SMETER level?

YES

Checked the

RDS data?

YES

NO

TU101(20, 21), IC401(65, 83)

TU101(7), IC401(55)

TU101(20, 21), IC401(65, 83)

OK

2-13

LGE Internal Use Only

5. AUX ERROR CORRECTION FLOW CHART

Something wrong with

the Tuner system?

AUX no sound?

YES

Checked the AUX

signal input?

YES

Checked the EVR

& power AMP?

YES

OK

NO

JK901, CN503,

CN901(15,17), IC601(11, 13)

See the sound error correction process.

LGE Internal Use Only

2-14

Only for training and service purposes

6. DVD ERROR CORRECTION FLOW CHART

Something wrong with the DVD system?

Loading/Unloading?

YES

Checked the eject

key defect?

YES

Checked the loading

motor IC Vdd?

YES

Checked the Load/

Unload control?

YES

Checked the Load/

Unload SW?

YES

Checked the MPEG Vdd?

YES

NO

6-A

6-E

~

See the system error correction

process with the key control.

IC1202(1, 6)

IC1202(7, 8, 2, 3)

See Figure 9, 11

CN1301(2, 4), SW1301, CN1202(13)

See Figure 10, 12

IC1301(VDD33, VDD12, +3VA)

See Figure 13

Checked the

MPEG Ground?

YES

Checked the

MPEG Reset?

YES

Checked the

MPEG X-tal?

YES

Checked the main

Micom data interface?

YES

Checked the main

Micom data interface?

YES

Checked the disc

in load switch?

YES

OK

NO

IC1301 VSS (1, 23, 35, 46, 63, 81,

100, 171, 180, 198, 208, 220, 234, 245)

IC401(23), IC203(5, 6)

CN902(10) IC1301 NRST(101)

X1301(1, 3)

See Figure 14

IC401(84, 85, 86, 29), CN902(4, 5, 6, 7)

IC1301(84, 85, 86, 87)

CN902(4, 5, 6, 7), CN1601(4, 5, 6, 7)

See Figure 15

CN1301(2, 4)

2-15

LGE Internal Use Only

6-A

6-B

Front LCD :

"INIT" display?

YES

Checked the

Input voltage of

MPEG IC?

YES

Checked the

GND condition of

MPEG IC?

YES

Checked

the MPEG

Reset?

YES

Check

the MPEG

X-tal?

YES

NO

IC1301(VDD33,

VDD12, +3VA)

See Figure 13

IC1301 VSS (1, 23, 35, 46, 63, 81, 100, 171, 180, 198, 208,

220, 234, 235)

NO

IC203(5, 6), CN902(10)

IC1301 NRST(101)

NO

See Figure 14

IC401(23),

X1301(1, 3)

No display

on monitor?

YES

Checked the

MPEG Video signal

out?

YES

Check the Video

Amplifier Vcc,

GND?

YES

Check the Video

Amplifier In,

Out?

YES

Check the Video

switching IC Vcc &

GND?

YES

NO

IC1301(161)

IC1603(3, 5)

See Figure 30

IC1603(2, 4)

See Figure 30

IC403(6, 7, 8)

Checked the

main Micom data

interface?

YES

Checked the

main Micom data

interface?

YES

OK

LGE Internal Use Only

NO

IC401(84, 85, 86, 29),

CN902(4, 5, 6, 7)

IC1301(84, 85, 86, 87)

CN902(4, 5, 6, 7)

CN1601(4, 5, 6, 7)

See Figure 15

2-16

Check

the Video switching

IC In, Out, mute

signal?

YES

Check the

RCA cable?

YES

OK

NO

IC403(3, 4, 5)

See Figure 31, 32

NO

CN403(1,2)

Only for training and service purposes

6-C

No reading &

"FILE CHECK"

display?

YES

Checked the

limit SW?

YES

Checked the

motor DRV mute

control?

YES

Checked

the focus

control?

YES

Checked the

focus error level out.

(FE Mon)?

YES

Checked

the tracking

control?

YES

NO

CN1202(13),

IC1301(75)

See Figure 18

IC1201(18)

See Figure 19

IC1201(10)

See Figure 20

FMON0

See Figure 20

IC1201(9)

See Figure 21

No Spindle

motor operating?

YES

Checked the

spindle driver

IC Vdd?

YES

Checked the

spindle driver IC

VHALF?

YES

Checked the

spindle driver IC

GND?

YES

Checked the

A1, A2, A3 of the

driver IC?

YES

NO

IC1201(22, 27,

35, 42, 43)

IC1201(4, 16)

IC1201(36, 38, 41)

IC1201(37, 39, 40)

See Figure 16

Checked the

tracking error level

out.(TE Mon)

NO

FMON1

See Figure 21

YES

Checked

the RF signal

out check?

NO

CN1101(17)

See Figure 22

YES

Checked

the sled motor

control?

NO

IC1201(1, 2, 3, 4)

See Figure 23, 24

YES

OK

2-17

Checked

the hall Bias

signals?

YES

Checked

the spindle motor

control?

YES

OK

NO

IC1201(27~33)

See Figure 17

IC1201(5)

LGE Internal Use Only

6-D

6-E

DVD/CD no sound?

YES

Checked the

MPEG Audio DATA

out?

YES

Checked

the DAC Vcc,

Vdd, GND?

YES

Checked

the DAC signal

In/out?

YES

Checked the

DAC mute?

YES

NO

(172, 173, 174,175)

NO

IC1401(4, 5, 6, 9, 10)

See Figure 25

IC1401(1, 2, 3, 7, 8, 16)

See Figure 26, 27

IC1301(178),

IC1401(11, 12)

See Figure 28

IC1301

No display on front monitor?

YES

Check the

parking brake

control?

YES

Checked

the MPEG Video

signal out?

YES

Check the

Video Amplifier

Vcc, GND?

YES

Check the

Video Amplifier

In, Out?

YES

NO

CN403(4),

Q415, IC401(12)

IC1301(161)

IC1603(3, 5)

See Figure 30

IC1603(2, 4)

See Figure 30

Checked the

OP AMP Vdd,

GND?

YES

Checked the

OP AMP signal

in/out?

YES

Checked the

E-VR & Power

AMP?

YES

OK

LGE Internal Use Only

NO

IC1402(4, 8)

See Figure 29

IC1402(1, 2, 6, 7)

See Figure 29

See a sound error

correction process.

2-18

Check the

Video switching IC

Vcc & GND?

NO

IC403(6, 7, 8)

See Figure 31

YES

Check the

Video switching

IC In, Out, mute

signal?

NO

IC403(3, 10, 11)

See Figure 31, 32

YES

Check the

front video signal

path?

NO

CN901(18)

YES

Check the

front video out

Jack?

NO

JK901, external

connecto to monitor

video cable

YES

OK

Only for training and service purposes

CN503(4)

• WAVEFORMS

Figure 1 (Initial connecting the Main connector and supply of electric power)

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

CH1 X401

CH2 X402 CH3 IC401(10)

CH4 Back-Up 5V L403

CH1 CN401(2)

Figure 3 (Front Micom control data)

CH2 CN401(4)

CH3 CN401(5)

CH4 CN401(6)

CH1 CN401(2)

CH2 CN401(4) CH3 CN401(5)

CH4 CN401(6)

2-19

LGE Internal Use Only

Figure 4 (The E-VR control data)

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

CH1 IC601(12)

CH2 IC601(13)

CH1 IC601(14) SAIN

Figure 6 (The Tuner initial control)

CH2 IC601(16) SAOUT

CH1 TU101 CE1(15)

CH2 TU101 CLK(13)

CH3 TU101 DI(14) CH4 TU101 DO(12)

LGE Internal Use Only

2-20

Only for training and service purposes

Figure 7 (The Tuner control data)

Figure 8 (The RDS data)

CH1 TU101 CE2(11) CH2 TU101 CLK(13)

CH3 TU101 DI(14) CH4 TU101 DO(12)

CH1 TU101 RDS CLK(20)

Figure 9 (Loading motor control about loading condition)

CH2 TU101 DATA(21)

CH1 IC1202(7)

CH2 IC1202(8)

CH3 IC1202(2)

CH4 IC1202(3)

2-21

LGE Internal Use Only

Figure 10 (Switch condition about loading)

Figure 11 (Loading motor control about unloading condition)

CH1 CN1301(2)

CH2 CN1301(4)

CH3 CN1202(12)

CH4 SW1301

CH1 IC1202(7)

CH2 IC1202(8)

Figure 12 (Switch condition about unloading)

CH3 IC1202(2)

CH4 IC1202(3)

CH1 CN1301(2) CH2 CN1301(4)

CH3 CN1202(12)

CH4 SW1301

LGE Internal Use Only

2-22

Only for training and service purposes

Figure 13 (MPEG IC voltage condition when the battery & ACC start on)

Figure 14 (MPEG RESET 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...)

CH1 L1604

CH2 CN1601(10)

Figure 15 (SPI Interface)

CH3 X1301(1,3)

CH1 CN1601(6)

CH2 CN1601(5)

CH3 CN1601(4)

CH4 CN1601(7)

2-23

LGE Internal Use Only

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)

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

CH2 IC1201(27) CH3 IC1201(29)

CH4 IC1201(31)

CH1 CN1202(13)

LGE Internal Use Only

2-24

Only for training and service purposes

Figure 19 (Motor driver mute signal STBY when spinup process)

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

CH1 IC1201(18)

CH1 TP : FMON0

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

CH2 CN1101(1)

CH3 CN1101(4)

CH1 TP:FMON1

CH2 CN1101(3)

CH3 CN1101(2)

2-25

LGE Internal Use Only

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

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)

2-27

CH1 IC1401(5)

CH2 IC1401(6)

CH3 IC1401(10)

CH4 IC1401(4,9)

LGE Internal Use Only

Figure 26 (DAC Control Signal / No DATA signal)

Figure 27 (DAC control signal / 1kHz sinewave)

CH1 IC1401(1)

CH2 IC1401(2)

CH3 IC1401(3)

CH4 IC1401(16)

CH1 IC1401(7)

Figure 28 (Audio mute / Track jump)

CH2 IC1401(8)

CH1 IC1401(2)

CH2 IC1401(8)

CH3 IC1401(11)

CH4 IC1301(178)

LGE Internal Use Only

2-28

Only for training and service purposes

Figure 29 (OPAMP / 1kHz sinewave)

Figure 30 (6dB Video amplifier)

CH1 IC1402(6)

CH2 IC1402(7)

CH3 IC1402(8)

CH4 IC1402(4)

CH1 IC1603(3)

CH2 IC1603(4)

Figure 31 (IC403 NJM2279M)

CH3 IC1603(2)

CH4 IC1603(5)

CH1 IC403(4)

CH2 IC403(3)

CH3 IC403(5)

2-29

LGE Internal Use Only

Figure 32 (IC403 NJM2279M / Mute ON)

CH1 IC403(4)

CH2 IC403(3)

CH3 IC403(5)

LGE Internal Use Only

2-30

Only for training and service purposes

INTERNAL BLOCK DIAGRAM OF ICs

1. IC301 (HA13173AH)

1-1. BLOCK DIAGRAM

CTL 1

11

1.5V

CTL 2

13

2.5V

CTL 3

9

3.5V

VB

+B

DBUP

8

Over voltage detect

BIAS

REF

V

TSD

15

14

C2

0.1uF

VBUP

CBUP 100uF

VDDOUT

C1 100uF

CFREG 10uF

DEXT1

DEXT2

CILM

0.1uF

QFREG

CTL 4

EXTOUT

CEXT 10uF

ILMOUT

FREG B

RFREG3

RFREG1

12

5

4

2

2.5V

REF

V

3

FREG F

GND

CVDD 10uF

DSPOUT

7

CDSP 10uF

REF

V

1

TAB

GND

CDOUT

6

AUDIOOUT

10

CCD

0.1uF

CAUDIO 10uF

RFREG2

2-31

LGE Internal Use Only

1-2. PIN FUNCTION (Note1)

Pin No.

Pin name Function

Normal

operation

(Note2) (Note3) (Note3)

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

8VB 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.

Protection function

LGE Internal Use Only

2-32

Only for training and service purposes

2. IC401 (uPD78F1164)

2-1. PIN CONFIGURATION

uPD78F1164

2-33

LGE Internal Use Only

2-2. PIN DESCRIPTION

Pin No

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)

4PAF_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)

11 PDUAL_MUTE O

12 PDVD_PICKUP_PWR O 1. DVD Pickup 5V control output

13 PHAND_BREAK I Hand Break signal inputOnly LAD4700

14 PDVD_POWER O DVD system Vdd control output(IC304 4pin)

15 PVIDEO_F_MUTE O

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

21 PFRT_PWR O

Name I/O Description

RSE audio Mute Control Output(Q201) Only LAD4700

DVD Vdd Control

2. DVD Motor 8V control output

Front Video Signal mute control output Only LAD4700

Front 5V control output(Q313) 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

Only for training and service purposes

Pin No

TUNER BAND OPTION

D401 D402 D403 AREA STEP

XXXOIRT/RE50K/9K

100K < - > 50K

10K <- > 9K

OXX ASIA/RC 100K/9K

OOXEUROPE/EW5/ RI 50K/ 9K

XXOEUROPE(LW)

XOO USA

D404 O RDS SEEK PI

D405 O LAD4710 DISPLAY

D406 O RDS ON

D407 O LAD4750 DISPLAY

XO

XL

LATIN/RD

Name I/O Description

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)

49 RTPD I

Wired remocon H/L selection input 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)

57 RTPA I

58 PLIGHT O Front LCD back light On/Off Control Output(Q319)

59 PDIMMER O Dimmer Control output for LCD back light

Wired Remocon RTPA Key Input. Only LAD4750

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)

2-35

LGE Internal Use Only

Pin No

Name I/O Description

Power on control

64 PPWR O

1. Line out B+ on/off control(Q309)

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

Only for training and service purposes

3. IC403 (NJM2279M)

14 13 12 11 10

1

2

98

123456

7

PIN FUNCTION

1. Vin3

2. SW1

3. Vin2

4. MUTE2

5. Vout2

6. GND2

7. GND1

8. V

+

9. N. C.

10. Vout1

11. MUTE1

12. Vin1

13. SW2

14. V

-

3-1. PIN CONFIGURATION

3-2. BLOCK DIAGRAM

2-37

LGE Internal Use Only

4. IC601 (TDA7419)

ACOUTR/AC2OUTR

ACINR/FILOR

ACINL/FILOL

ACOUTL/AC2OUTL

SE3L/ACINL

SE2L

SE3R/ACINR

SE2R

SE1L OUTLF

MUTE

SCL

VDD

SDA

SAIN

SAOUT

VREF

MIX/OUTSW/OUTRR21

3

2

4

5

6

7

8

9

26

25

24

23

22

20

21

19

27

10

28

SE1R OUTLR

D04AU1569

DIFFL

DIFFG

DIFFR OUTSW/OUTLR2

OUTRF

OUTRR11

12

13

18

16

17

1514CREF GND

OUTLF

OUTRF

OUTLR

OUTRR

INPUT

MULTIPLEXE

R

InGain

AutoZero

I2C BUSDIGITAL CONTROL

OUTSW/ OUTLR2

MUTE

Loudness MiddleTreble BassSoftMute

Softstep Volume

Softstep

MonoFader

Softstep

MonoFader

Softstep

MonoFader

SUPPLY

VDD CREFGND

SDASCL

DIFFG

DIFFL

SE1R

SE1L

DIFFR

SE2L

SE2R

Spectrum Analyzer

Softstep

MonoFader

Subwoofer

LPF

Mix

MIX/ OUTSW/ OU

TRR2

HPF

Softstep

MonoFader

Softstep

MonoFader

AC2INL/

SE3L

AC2INR/

SE3R

ACOUTL/

AC2OUTL

ACOUT R/ AC2OUTR

ACINL/

FILOL

ACINR/

FILOR

VREFOUTF

SAOUT SAC LK

InGain

OUTLF

OUTRF

OUTLR

OUTRR

INPUT

MULTIPLEXER

InGain

AutoZero

I2C BUSDIGITAL CONTROL I2C BUSDIGITAL CONTROL

OUTSW/ OUTLR2

MUTE

Loudness MiddleTreble BassSoftMute

Softstep Volume

Softstep

MonoFader

Softstep

MonoFader

Softstep

MonoFader

SUPPLY

VDD CREFGND

SDASCL

DIFFG

DIFFL

SE1R

SE1L

DIFFR

SE2L

SE2R

Spectrum Analyzer

Softstep

MonoFader

Subwoofer

LPF

Mix

MIX/ OUTSW/ OU

TRR2

HPF

Softstep

MonoFader

Softstep

MonoFader

AC2INL/

SE3L

AC2INR/

SE3R

ACOUTL/ AC2OUTL

ACOUT R/ AC2OUTR

ACINL/

FILOL

ACINR/

FILOR

VREFOUTF

SAOUT SAC LK

InGain

4-1. PIN CONFIGURATION

4-2. BLOCK DIAGRAM

LGE Internal Use Only

2-38

Only for training and service purposes

4-3. PIN DESCRIPTION

N#

Pin Name Function I/O

1ACOUTR / AC2OUTR AC coupling right output / HPF filter AC2OUT right channel O

2ACINR / FILOR AC coupling right input / HPFfilter FILO right channel I/O

3ACINL / FILOL AC coupling left input / HPF filter FILO left channel I/O

4ACOUTL / AC2OUTL AC coupling left output / HPF filter AC2OUT left channel O

5SE3L / 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

7SE2LSingle-ended input 2 left channel I

8SE2RSingle-ended input 2 right channel I

9SE1LSingle-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 / 2

nd

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 / 2

nd

rear right output

I/O

2-39

LGE Internal Use Only

5. IC801 (TB2904HQ)

A

5-1. BLOCK DIAGRAM

C1

C6

C1

PRE-GND

1 20 6

TAB V

IN1

11

IN2

12

C-GND

16

IN3

15

IN4

14

13

STBYRIP

10 25 22

2

C

4

CC1VCC2

OFF-SET

DET

OUT1

()

PW-GND1

OUT1 ( )

OUT2 ( )

PW-GND2

OUT2 ( )

OUT3 ( )

PW-GND3

OUT3 ( )

OUT4 ( )

PW-GND4

OUT4 ( )

MUTE

4

C

3

5

C

+

9

R

8

7

+

5

2

3

+

17

18

-

19

+

21

24

-

23

R

1

L

R

L

R

L

R

L

5 V

PLAY

MUTE

: PRE-GND

: PW-GND

6. IC901 (PT6523)

6-1. PIN CONFIGURATION

SG49

SG50

SG51

SG52

COM1

COM2

COM3

VDD

INH

VDD1

VDD2

VSS

OSC

CE

CLK

DI

SG45

SG46

SG47

SG48

8

46

47

45

4

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64 SG17

123456789

SG1

SG3

SG4

SG2

SG42

SG40

SG41

SG43

SG44

43

42

44

SG5

SG6

SG7

SG8

SG37

SG38

SG39

3934403541

SG9

SG36

38

36

37

10111213141516

SG11

SG12

SG10

SG13

SG33

SG34

SG35

33

32

SG32

31

SG31

30

SG30

29

SG29

SG28

28

27

SG27

26

SG26

SG25

25

24

SG24

SG23

23

22

SG22

21

SG21

20

SG20

SG19

19

18

SG18

17

SG14

SG15

SG16

LGE Internal Use Only

2-40

Only for training and service purposes

7. IC1502 (ES29LV320E)

7-1. PIN CONFIGURATION

A15

A14

A13 A12 A11 A10

A9

A8 A19 A20

WE#

RESET#

NC

WP#/ACC

RY/BY #

A18 A17

A7

A6

A5

A4

A3

A2

A1

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

7-2. BLOCK DIAGRAM

Vcc

Vss

Vcc Dete

ctor

RY/BY

48-Pin Standard TSOP

ES29LV320E

#

Timer/ Counter

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25

DQ0-DQ15(A-1

A16 BYTE# Vss DQ15/A-1 DQ7 DQ14 DQ6 DQ13 DQ5 DQ12 DQ4 Vcc DQ11 DQ3 DQ10 DQ2 DQ9 DQ1 DQ8 DQ0 OE# Vss CE# A0

)

WE

RESET#

A<0:20

CE#

OE#

BYTE#

Analog Bias Generato

#

Command

r

Registe

Write State Machin

e

r

Input/Output Buff

ers

Data Latch/

Sector Swit

ches

Y-D ecode

Sense Amp

r

Y-D ecode

s

r

>

Ce Chip Enable Output Enable

c

Logi

X-Deco

Address Latch

der

ll Array

2-41

LGE Internal Use Only

7-3. PIN DESCRIPTION

Pin Description

A0-A20 21 Addresses

DQ0-DQ14 15 Data Inputs/Outputs

DQ15/A-1

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

Vcc

Vss Device Ground

NC Pin Not

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

3.0 volt-only single power supply (see Product Selector Guide for speed options and voltage supply tolerances)

Connected Internally

LGE Internal Use Only

2-42

Only for training and service purposes

BLOCK DIAGRAMS

LGE Internal Use Only

1. OVERALL BLOCK DIAGRAM

2-43 2-44

2. DVD BLOCK DIAGRAM

Only for training and service purposes

LGE Internal Use Only

2-45 2-46

CIRCUIT DIAGRAMS

LGE Internal Use Only

1. MAIN-1 CIRCUIT DIAGRAM

2-47 2-48

2. MAIN-2 CIRCUIT DIAGRAM

Only for training and service purposes

LGE Internal Use Only

2-49 2-50

3. FRONT CIRCUIT DIAGRAM

LGE Internal Use Only

• MODEL LAD4700(R)/4705(R)

2-51 2-52

FRONT CIRCUIT DIAGRAM

Only for training and service purposes

LGE Internal Use Only

• MODEL LAD4710(R)

2-53 2-54

4. DVD-1 CIRCUIT DIAGRAM

LGE Internal Use Only

2-55 2-56

5. DVD-2 CIRCUIT DIAGRAM

Only for training and service purposes

LGE Internal Use Only

2-57 2-58

6. DVD-3 CIRCUIT DIAGRAM

LGE Internal Use Only

2-59 2-60

7. AUX CIRCUIT DIAGRAM 8. LCD LIGHTING CIRCUIT DIAGRAM

Only for training and service purposes

LGE Internal Use Only

2-61 2-62

PRINTED CIRCUIT BAORD DIAGRAMS

LGE Internal Use Only

1. MAIN P.C.BOARD

(TOP VIEW) (BOTTOM VIEW)

2-63 2-64

2. FRONT P.C.BOARD

Only for training and service purposes

LGE Internal Use Only

• MODEL LAD4700(R)/4705(R)

(TOP VIEW)

(BOTTOM VIEW)

• MODEL LAD4710(R)

(TOP VIEW)

(BOTTOM VIEW)

2-65 2-66

3. DVD P.C.BOARD

LGE Internal Use Only

(TOP VIEW) (BOTTOM VIEW)

2-67 2-68

4. AUX P.C.BOARD

Only for training and service purposes

LGE Internal Use Only

MEMO

5. LCD LIGHTING P.C.BOARD

2-69 2-70

SECTION 3 EXPLODED VIEWS

LGE Internal Use Only

1. CABINET AND MAIN FRAME SECTION

276

270

288

273

A50

260

269

275

271

267

268

274

272

A45

262

261

266

A43

285

265

264

278

LCD1

284

280

263

A49

277

282

279

281

453

A44

451

295

451

CABLE2

A46

298

451

CABLE1

451

299

460

DVD

A41

451

A26

Accessory

Loc.No.

801 808

818

836

Loc.No.

835

850

900

283

250

453

256

252

258

253

251

254

A42

255

257

294

454

451

291

MAIN

290

289

451

292

452

456

FAN1

293

296

455

297

451

452

451

3-1 3-2

2. MECHANISM(PICK-UP) SECTION

Only for training and service purposes

LGE Internal Use Only

MEMO

A03

3-3 3-4

LG LAD4700R Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual