LG MDD-K263Q, MDS-K263V Service manual

MODEL : MDD-K263Q (MDS-K263V)

SERVICE MANUAL

P/NO : AFN62795882

KARAOKE MINI Hi-Fi SYSTEM

SERVICE MANUAL

CAUTION

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

MODEL : MDD-K263Q (MDS-K263V)

Website http://biz.lgservice.com

Internal Use Only

SEPTEMBER, 2008

1-1

LGE Internal Use Only

[CONTENTS]

❍ SECTION 1. GENERAL

• SERVICING PRECAUTIONS ................................................................................................ 1-2

• ESD PRECAUTIONS ............................................................................................................ 1-4

• PROGRAM DOWNLOAD GUIDE.......................................................................................... 1-5

• SPECIFICATIONS ................................................................................................................ 1-6

❍ SECTION 2. EXPLODED VIEWS

• CABINET AND MAIN FRAME SECTION.............................................................................. 2-1

•

MECHANISM EXPLODED VIEW .......................................................................................... 2-3

•

SPEAKER EXPLODED VIEW .............................................................................................. 2-9

• PACKING ACCESSORY

VIEW............................................................................................ 2-10

❍ SECTION 3. ELECTRICAL PART

• TROUBLESHOOTING GUIDE

AUDIO PART TROUBLESHOOTING GUIDE ........................................................................ 3-1

DVD PART TROUBLESHOOTING GUIDE .......................................................................... 3-10

USB PART TROUBLESHOOTING GUIDE .......................................................................... 3-16

• WAVEFORMS OF MAJOR CHECK POINT ........................................................................ 3-17

• WIRING DIAGRAM .............................................................................................................. 3-22

• BLOCK DIAGRAMS ............................................................................................................ 3-23

• CIRCUIT DIAGRAMS .......................................................................................................... 3-25

• INTERNAL BLOCK DIAGRAM OF IC ................................................................................ 3-45

• CIRCUIT VOLTAGE CHART ................................................................................................ 3-59

• PRINTED CIRCUIT DIARGAMS ........................................................................................ 3-65

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

1-2

Only for training and service purposes

LGE Internal Use Only

SERVICING PRECAUTIONS

NOTES REGARDING HANDLING OF THE PICK-UP

1. Notes for transport and storage

1) The pick-up should always be left in its conductive bag until immediately prior to use.

2) The pick-up should never be subjected to external pressure or impact.

2. Repair notes

1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials.

2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board.

3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched.

4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter the eyes! Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged.

5) Cleaning the lens surface

If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort this.

6) Never attempt to disassemble the pick-up. Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up.

Storage in conductive bag

Drop impact

NEVER look directly at the laser beam, and don’t allow contact fingers or other exposed skin.

Magnet

How to hold the pick-up

Conductive Sheet

Cotton swab

Pressure

SECTION 1. GENERAL

1-3

LGE Internal Use Only

NOTES REGARDING COMPACT DISC PLAYER REPAIRS

1. Preparations

1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care.

2) The pick-up is composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature of humidity is high, where strong magnetism is present, or where there is excessive dust.

2. Notes for repair

1) Before replacing a component part, first disconnect the power supply lead wire from the unit

2) All equipment, measuring instruments and tools must be grounded.

3) The workbench should be covered with a conductive sheet and grounded. When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.)

4) To prevent AC leakage, the metal part of the soldering iron should be grounded.

5) Workers should be grounded by an armband (1M Ω)

6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static electricity changes in the clothing to escape from the armband.

7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin.

Resistor (1 Mohm)

Conductive Sheet

Resistor (1 Mohm)

Armband

1-4

Only for training and service purposes

LGE Internal Use Only

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

SAFETY PRECAUTIONS

1-5

LGE Internal Use Only

PROGRAM DOWNLOAD GUIDE

Caution) Do not perform any other work such as disconnecting USB device, switching to the Function and turning

off the power while downloading it to the set.

The USB device should be disconnected after completing the download.

• AUDIO USB DOWNLOAD GUIDE

1. When the USB device is inserted on the USB function, is displayed on the screen after a while.

“File : MDD263_yymmddx.hex” * x: version.

2. The message “Upgrade” is displayed while downloading.

3. The power is automatically turned off when downloading is completed.

• DVD USB DOWNLOAD GUIDE

The program file to download should be named as BANK.ROM.

- The downloaded file should be modified as BANK30.ROM.

- After safely storing BANK30.ROM at the USB device, perform the following

steps.

1. When the USB device is inserted at the USB function, the screen is changed into downloading

screen.

2. When downloading is completed, the message “Completed” is displayed at the top left on the screen.

3. Turn on the power, press the SETUP button of the remote controller on the USB FUCTION. When the

SETUP window is displayed on the screen, move down once to select the DISPLAY menu. Go to the

TV Aspect on the right menu, move to “16:9”, enter “1397139” by using the numeric key of the remote

controller, and press the Ent er key.

Then, the System Information screen is displayed. If not, retry the steps at the above.

4. When Step 3 is completed, press the Pause key of the remote controller.

5. Disconnect the power cord, and reconnect it after 5 seconds to complete downloading.

6. When the power is turned on, the language selection menu is initially displayed.

After selecting the desired language, press the SELECT/ENTER. ( * not KARAOKE MODEL )

1-6

Only for training and service purposes

LGE Internal Use Only

SPECIFICATIONS

General

Power supply Refer to main label. Power consumption Refer to main label. Net Weight 6.2 kg External dimensions (W x H x D) 273 x 326 x 380 mm Operating conditions Temperature: 5° C to 35° C, Operation status: Horizontal Operating humidity 5% to 85%

Tuner

FM Tuning Range 87.5 - 108.0 MHz or 65.0 - 74.0 MHz, 87.5 - 108.0 MHz Intermediate Frequency 10.7 MHz AM Tuning Range 522 - 1,620 kHz or 520 - 1,720 kHz Intermediate Frequency 450 kHz

Amplifier

OUTPUT POWER Front: 130 W + 130 W (4 Ω, THD 10 %)

DVD/ VCD/ CD player

Frequency response (audio) 40 - 20000 Hz Signal- to- noise ratio (audio) More than 75 dB (1 kHz) Signal- to- noise ratio (video) More than 55 dB (1 kHz) Dynamic range (audio) More than 80 dB Video output 1.0 V (p- p), 75 Ω Component Video output (Y) 1.0 V (p- p), 75 Ω

(Pb)/( Pr) 0.7 V (p- p), 75 Ω

Cassette tape player

F. F/ REW Time 120 sec (C- 60) Frequency Response 250 - 8000 Hz Signal to Noise Ratio 43 dB Channel Separation 45 dB (P/ B)/ 45 dB (R/ P) Erase Ratio 50dB (MTT- 5511)

Speakers

MDS-K263V

Front Speaker Type 2Way 3Speaker Impedance 4 Ω Rated Input Power 130 W Max. Input Power 260W Net Dimensions(W x H x D) 212x 413x 301mm Net Weight 5.5 kg

Designs and specifications are subject to change without pior notice.

2-1 2-2

LGE Internal Use Only

• CABINET AND MAIN FRAME SECTION

SECTION 2. EXPLODED VIEWS

252

465

A26

CABLE4

NOTES) THE EXCLAMATION POINT WITHIN AN

EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE.

L

K

459

A

KEY2

253

P

A43

A

254

255

465

KEY1

FRONT

256

459

O

MIC

KEY3

261

253

CABLE3

459

H

G

260

251

459

CABLE5

P201

257

A40

J

459

P

255

267

I

A41

DVD

CABLE2

450

266

N

M

465

L

K

N

M

J

A46

D

I

C

MAIN

H

B

O

465

458

465

264

455

465

CABLE6

289

456

D

SMPS

CABLE7

C

A47

263

B

262

273

A00

465

F

CN201

465

E

CABLE1

290

465

291

305

2-3 2-4

Only for training and service purposes

LGE Internal Use Only

MECHANISM EXPLODED VIEW

1. TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK)

BRASS MOTOR PULLEY MAYBE CHANGEDFOR WOW FLUTTER WHEN NECESSARY

RING FW MAYBE ADDEDFOR WOW FLUTTER WHEN NECESSARY

A00

001

002

003

009

011

009

013

A02

015

008

007

006

037

022

023

025

016

017

018

020

A01

019

TAPE DECK MECHANISM EXPLODED VIEW

2. TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK)

RING FW MAYBE ADDED FOR WOW FLUTTER WHEN NECESSARY

A00

003

009

011

009

013

A03

015

008

007

022

023

024

016

017

018

020

019

2-5 2-6

LGE Internal Use Only

TAPE DECK MECHANISM EXPLODED VIEW

3. MECHANISM DECK EXPLODED VIEW

2-7 2-8

Only for training and service purposes

LGE Internal Use Only

416

151

159

156 169

422

A26

417

167

416

177

166

164

417

165

440

438

172

175

163

170

419

168

155

162

417

153

173

012A

417

418

169B

169C

430

169A

418

181

A30

430

012A

036

035

180

035A

438

2-9

LGE Internal Use Only

• FRONT SPEAKER (MDS-K263V)

SPEAKER EXPLODED VIEW

A80L

A80R

850

851

853

852

854

A81L

A81R

854

855

856

857

858

860L

860R

861

859

2-10

Only for training and service purposes

LGE Internal Use Only

• PACKING ACCESSORY

VIEW

808 Battery

900 Remote Control

801 Instruction Ass'y

811

Plug Ass'y, 1Way

Antenna Loop

824

827

825 Antenna

Micro Phone

832

DISC

803 Packing

804 Bag

801S

Song Book

803 Packing

802 Box

3-1

LGE Internal Use Only

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER (SMPS)

SECTION 3. ELECTRICAL PART

NO

YES

Replace the fuse.

Check the FUSE

F901.

NO

YES

Check BD901,LF901,902.

NO

Check short of P9702 line.

Check short of P9701,P9702 line.

NO

Check short of P9701 line.

NO

Replace IC901,902.

Check

the DC V of C905

if DC V is over

400V.

NO

YES

Check the

DC V of C909,C903,C921

If DC V is in 14~19V

And it is steady

Check IC901,902.

YES

Check the

DC V of C981,C945.

If DC V is 6.1V.

YES

Check the

DC V of C950,C951

If DC V is in

31.68V.

POWER (SMPS)

OK

3-2

Only for training and service purposes

LGE Internal Use Only

2. P-SENS 3. VKK PART CHECK

4. MICOM PART CHECK I

NO

Check power circuit

Troubleshooting.

YES

P-SENS

Check

the PIN6 of P9702

if DC V is over

5.6V

YES

OK

OK OK

NO

Check power circuit

Troubleshooting.

YES

VKK CHECK

Check

the PIN3 of P9702

if DC V is over

-28V.

YES

OK

NO

NO NO

Replace IC101

(KIA7042)

Check if IC101 of output

voltage is over4.3V

YES

YES YES

YES

Check voltage of

IC100(LC87Fxxx)PIN4

YES

Refer to SMPS

troubleshooting.

MICOM PART

HECK I

Check P-SENS

(P7904_PIN6)

NO

Check both

End voltage of IC101

(KIA7042)

Check

If input voltage of

IC101 is over 5V

Check the

Periphery of IC101

(KIA7042)

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE

3-3

LGE Internal Use Only

5. MICOM PART CHECK II

6. IC103(S24CS16A01) PART CHECK

NO

YES

Refer to SMPS

troubleshooting.

Check If IC103_PIN8 and

IC100_PIN14,40,55,89 are 5V .

X101:32.768KHz

X100:9.8304MHz

Check the operation.

Check P-SENS

(P7904_PIN6).

Check both

End voltage of D101.

Check

If output of

D101 is 5V.

Check D101.

MICOM PART CHECK II

NO

Replace D101.

OK

YES

PIN81:DATA

PIN82:CLK

Check MICOM.

NO

Check MICOM

Voltage 5V.

CHECK IC100

PIN81,82

NO

Replace MICOM.

NO

Refer to micom

troubleshooting.

OK

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE

3-4

Only for training and service purposes

LGE Internal Use Only

7. FLD DISPLAY PART CHECK

NO

YES

Refer to SMPS.

NO

Replace P3302.

Check P3302 Connection.

Check if both end voltage of

F1,F2 are over 3.7V.

VKK : Over 28V

YES

FLD light on?

Check

P7904 PIN1,2,3

Voltage input

YES

Check P7302

Connection and Power.

pin29:FL+26,pin28:FL-22,

pin27:Vkk over 28V,

pin24:+5.6V

YES

Check

IC301(PT6324)Voltage

Pin50 VKK:-28V

PIN:9,52:+5V

YES

Check each

PIN voltage.

IC100

Check IC301

Data communication.

Pin pin 27pin 3pin STB 26pin 2pin data 28pin 1pin clk

FLD DISPLAY CHECK

OK

NO

Replace IC301.

NO

Replace IC100.

NO

IF voltage is not 5V.

Check input and output of D303.

IC100 : 27,26,28 PIN Check

DATA INPUT.

26PIN DATA OUT

Check DATA INPUT.

YES

Check IC301.

YES

Check IC100.

OK

YES

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE

3-5

LGE Internal Use Only

8. PWM MODULATION PART CHECK

P7905 PIN9,10

3.3V Check

PWM MODULATION

PART CHECK

Refer to SMPS

Troubleshooting

NO

Check

X601 12.288MHz

Operation.

IC604

PIN86 CLK INPUT

Check

IC100(LC87Fxx)

PIN22:PWM REST

PIN79:PWM SDA

PIN80:PWM SCL

OUTPUT

YES

Check

IC604(PS9830)

DATA INPUT PIN23,24,25,26

PWM WAVE

Check.

Check PWM

Modulator output

FL:PIN75(+),74(-) FR:PIN71(+),70(-) OTHER OUTPUT

Check

Check IC604(PS9830)

VDD PIN VOLTAGE

(3,10,22,29,39,47,56,65,72,87,94)

Check X601 PIN2 :3.3V

OK

Replace X601.

NO

YES

Check X601

12.288MHz

OK

Replace R671,R670,R665

NO

YES

Check LINE

Resistor output

SDA:R671,SCL:R670

RST:R665

Refer to DVD troubleshooting

NO

Check

DVD ASSY Communication

P7403

Check each LINE

Resistor output

NO

Check

IC604(PS9830) DATA

INPUT

OK

YES

OK

Replace IC604.

NO

Check

IC604(PS9830)

YES

OK

NO

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE

3-6

Only for training and service purposes

LGE Internal Use Only

9. PWM MODULATION PART CHECK

YES

NO

Refer to SMPS Troubleshooting.

P7905 PIN3:+12v

PIN13,14,15:32V

YES

NO

Check each line resistor output voltage.

Check each

IC700 PIN1,22,23,44:+12V

INPUT

YES

NO

Replace the coil.

Check output

line coil.

POWER AMP PART CHECK

OK

Check each IC700,701,702,703

PIN27,26,32,35,40,41 INPUT VOLTAGE

YES

Check PWM Modulator input

each PIN6,8,16,18.

YES

POWER IC700

PIN28,31,36,39 output.

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE

3-7

LGE Internal Use Only

10. AUX FUNCTION PART CHECK

OK

Check

IC200 (BU4052)

PIN3,13 each function

output.

Check

IC200 (BU4052)

PIN7:-12V

PIN:16:+12V

Check IC801

(MC4580)

PIN1,7 output.

Check

IC201 (CS5345)

PIN26,27 INPUT.

Check

IC201 (CS5345)

PIN41 data output.

FUNCTION CHECK

Each function

(tuner/tape/portable)

output to IC200(BU4052)

input : L/R_CH.

Check P7501

PIN6(L-CH),PIN8(R-CH).

Each function

output line Check.

Check

IC801 (MC4580)

PIN:-12V

PIN:8:+12V

Check ic201

PIN46:+3.3V

PIN14:+5V

Check ic201

PIN1:SDA PIN2:SCL PIN6:RST

Refer to SMPS.

Check CN202 Connection.

IC501(ES8390)

PIN55 INPUT DATA.

IC501(ES8390)

DADATA0 OUTPUT.

Check P7905 connection

After replace IC200.

Check CN202 PIN4,5:+5V

PIN11,12: +3.3V

Check CN206

PIN8:SDA,PIN9:SCL,PIN10:RST

Replace IC201.

YES

NO

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE

3-8

Only for training and service purposes

LGE Internal Use Only

11. TUNER/TAPE/PORTABLE FUNCTION PART CHECK

NO

YES

Refer to SMPS troubleshooting.

Check A DECK head input IC201_PIN32, 39 and B DECK head input IC201_PIN34, 37.

Check IC210

(HA12237)_PIN16

12V in put.

Check

IC201_ PIN5,

26 signal output.

YES

Check

IC201_PIN14

mute operation.

YES

Check IC201.

Check A/B

DECK head input.

TAPE PLAY PART CHECK

NO

Replace head wire and tape

DECK mechanism.

NO

Replace IC201.

OK

YES

OK

NO

Check IC202_PIN10 "HIGH"

YES

Check IC202.

NO

Replace IC202.

YES

OK

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE

3-9

LGE Internal Use Only

12. TAPE PLAY PART CHECK

NO

Refer to PWM modulation

troubleshooting.

Check

IC604(PS9829)

_PIN49, 52 PWM

output.

Check IC201_

PIN10, 21 output.

Check IC100_ PIN23 "HIGH"

TAPE REC PART CHECK

NO

Replace IC201.

Replace IC202.

Check IC201_PIN7, 24

record input.

YES

OK

NO

Check L203_PIN2, 3

oscillation

Check Q205(D1304)_

base "HIGH"

NO

Check IC202_PIN4 "HIGH".

YES

OK

YES

Check P2203_PIN5, 3inputand

PIN8 erase input.

YES

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE

3-10

Only for training and service purposes

LGE Internal Use Only

DVD ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER PART CHECK GUIDE

NO

OK.

NO

Reconnect it.

YES

NO

YES YES

Check an Audio

Micom or interface

reconnect (CN201)

YES

Check DVD MD

Module.

POWER ON

YES

POWER ON

Does

DVD/CD

appear at FLD?

YES

Does No DISC or Time are appeared

at FLD?

YES

Check connector

CN701.

Check the

voltage of each pin

on P201.

Does it

appear DVD

ERROR at FLD?

Does

AUX, FM

87.5.AM,USB appear at

FLD?

Func

Check Connector

(P400,P4004,

P401).

OK

3-11

LGE Internal Use Only

2. TEST & DEBUG FLOW

NO

Check connection lines between

FLASH & ES8390 or the FLASH

access time whether is suitable or not.

YES

Check AV cable connection

to TV set.

Show LOGO?

YESYES

Flash Memory

operates properly?

NO

Check connection lines

between SDRAM (IC502) &

ES8390 or the SDRAM is

damaged.

YES

SDRAM works

properly?

NO

Check the related circuit of

ES8390 (IC501)

PIN133,134,137,138,139,140

YES

ES8390 VIDEO

outputs properly?

NO

Check the MD mecha

Check the cable connection between

DVD PCB and MD (MECHA).

Does tray

move inside when it is

closed position?

YESYES

OPEN_SW&CLOSE_

SW Signals on P401

are OK?

NO

Check the output signal of

ES8390 to IC401 for control

OPEN/CLOSE.

YES

OPEN / CLOSE

signals on IC401 are

OK?

NO

Check the Tray control I/O

Pin on IC401.

YES

Load+ & load- signals

on P4408 are OK?

POWER ON

A

DVD ELECTRICAL TROUBLESHOOTING GUIDE

3-12

Only for training and service purposes

LGE Internal Use Only

NO

Check the related circuit of SLED

and Motor driver IC ( IC401)

YES

Check the cable connection

with MECHA.

Do not put in disc

and tray close.

Does the

SLED move to inner side

when it is at outer

position?

YES

SLED signal is OK?

NO

Check the MD

YES

Motor Driver

DRV_MMUTE PINIS

High 3

NO

Check Focus connection on

ES8390 and motor driver IC.

Check cable connection

with pick-up head.

Optical

Lens is moving

for searching Focus?

YESYES

Proper

Focus outputs

to motor driver?

NO

Check the motor driver (IC401).

YES

Proper F+ & F-outputs?

A

B

DVD ELECTRICAL TROUBLESHOOTING GUIDE

3-13

LGE Internal Use Only

NO

Check the laser power circuit between

ES8381 and power transistor.

(Q405, Q406)

YES

Check cable connection

between P400 and pick-up head.

Laser turns on

when reading

disc?

YESYES

DVDLD or CDLD

output properly?

NO

Check the related circuit of laser

power transistor.

YES

Collector

voltage of power transistor

is ok? (Q405, Q406)

NO

Check the SPINDLE related

circuit on ES8390.

Check the cable connection

between P400 and MD.

Does SPINDLE

rotate?

Put disc in tray.

YES

Proper SPINDLE

signal on ES8390.

NO

Check the SPINDLE control of

motor driver (IC404).

SPIN+&SPIN- output

properly?

B

C

DVD ELECTRICAL TROUBLESHOOTING GUIDE

Laser off

3-14

Only for training and service purposes

LGE Internal Use Only

NO

Check the connections between

PDM01 and pick-up head.

YES

Check cable connection

between P400 and MD.

Focus On OK?

YESYES

Proper signal on

A,B,C,D from MD?

NO

Check the related circuit of

ES8390 FOCUS signal.

YES

Proper FOD signal on

IC401?

NO

Check the related circuit

between IC401 and ES8390.

Check cable connection on

pick-up head.

Tracking OK?

YES

Proper TRD signal on

IC401?

NO

Check the Tracking control

on motor driver (IC401).

T+ & T- output

properly?

NO

Check RF signal waveform.

Disc play?

C

D

DVD ELECTRICAL TROUBLESHOOTING GUIDE

3-15

LGE Internal Use Only

NO

Check the connections

between ES8390 and CN201.

YES

Check the MAIN PCB.

All

outputs are Ok

during playing

DISK ?

YESYES

Audio signal data on

P8390 is OK?

NO

For example composite video,

Check the video mute TR

(Q507), ES8390

video signal data.

Picture

signal data on

ES8390 is OK?

D

TEST END

3-16

Only for training and service purposes

LGE Internal Use Only

1. USB PART

YES

NO

Check the POWER supply circuit.

(Check P201)

Check the HRST # signal.

"Searching" or

"USB" Display check.

YES

Check the USB PART and DVD part line.

YES

NO

Check the USB PART supply.

(Check CN205)

Check the USB DATA LINE. (CN205)

Reading OK check

YES

Check the ES8390.

(Check DATA LINE PIN98_USB_NO, 99_PO)

YES

TURN ON USB

OK

USB ELECTRICAL TROUBLESHOOTING GUIDE

3-17

LGE Internal Use Only

WAVEFORMS OF MAJOR CHECK POINT

1. WHEN POWER ON, RESET & DATA ETC WAVEFORM

1

2

3

1

2

4

1

2

3

4

1

2

IC501

RESET(DVD)

RX

TX

LCS3# (FLASH)

HRST#

5V

D-

D+

3-18

Only for training and service purposes

LGE Internal Use Only

2. OPEN/CLOSE WAVEFORM AT POWER ON

3

1 2

4

1

2

3

4

3. STARTING ACTION WAVEFORM IN MD DEVICE

2

1

2

4. FOCUS WAVEFORM (AT CD)

2

1

2

open

UP-sw

DOWN-sw

close

SL+

Driver STBY

SLEGN

SL-

F+

F-

3-19

LGE Internal Use Only

5. FOCUS WAVEFORM (AT DVD)

1

2

1

2

6. AT POWER ON , SPINDLE SIGNAL AT MD DECK

1 2

3

1

2

3

7. AT FIRST ACTION, FOCUS SIGNAL A,B,C,D

1

4

3

2

1

3

4

Q405(DVD_LD)

Q406(CD_LD)

Spind

Spin+

Spin-

A

B

C

D

3-20

Only for training and service purposes

LGE Internal Use Only

8. TRACKING SIGNAL

1

2

3

1

2

3

Tr o

Tr -

9. RF WAVEFORM

1

2

Tr +

3-21

LGE Internal Use Only

3

1

2

10. DISK TYPE JUGEMENT WAVEFORM

1

2

3

DVD CD

F+

FDO

SVRRF

3-22

Only for training and service purposes

LGE Internal Use Only

WIRING DIAGRAM

13P

8P3P

MODULE

AUX

JACK

2 CH SPK TERMINAL

8P

TUNER

3page CHANGER MD

5P

23P

3P

5P

3P

VIDEO

JACK

iPod

JACK

DVD PCB

AUX

JACK

18P

PCB

MAIN

29P

MECHANISM

DOUBLE DECK

FRONT PCB

SMPS PCB

15P

12P

USB MIC H/P

4P

8P

3-23

LGE Internal Use Only

1. MAIN BLOCK DIAGRAM

BLOCK DIAGRAMS

FL

FR

Power

FR +/-

PS9830

AUDIO

Digital

PWM

Modulator

MICOM

N

AMP_PRT, SD, PD

TAS5152orTAS5142

FL +/-

DATA, CLK

PWM_R ST,

K

EEPROM

DATA, CL

M

EEPRO

KS24C021

LC87F5NC8A

P

AM

OPT.

IPOD_DET, RDY

SDRAM

SERIAL

EEPROM

TA

STATIO

N X AU

RGB

CVBS

MD

MOTOR

PICK UP

MOTOR

PICK UP

TR +/-, F +/-

SP+/-, SL+/-

LM+/-, TUR+/-

IP9011

MOTOR

DRIVER

A, B, C, D, E, F, RF, MDI, CTL, VR, LDO1/2

DB[0:15]

DMA[0:10]

CS, DI, DO

SPI_ CLK

SDA, SCL

DA_DATA0, 1, 2, 3

MCLK, DA_LRCK, BCK

/CL

SVREF

DRV_MUTE

TRO, FO, SLD

SPO, TUR, OP

MPEG

ES8390

DVD_RST, CS, CLK, DI, DO

5345_RST, CLK, DA

16:9_4:3, RGB_SEL, TV_MODE

FLASH

SCART

O

CVBSY/G, PR/R, PB/B, Y, C

IPOD_VIDE

S/W

VIDEO

MM1225

+6dB

VIDEO

MM1692

SENSOR, OP/CL/UP/DN SW, LIMIT

COMPOSITE

AD_DATA

DOCKING

IPOD

OPTICAL IN

IPOD IN

WITH

6Ch. MUX

IN

MAIN AUDIO

IPOD_RX, TX

Y/G, PR/R, PB/B

AMP

AUX IN

SCART IN

ADC

CS5345

STEREO

/B

D

VFD_STB, DO, CLK

EXP_DATA, CLK

HALL_A/B, LEAF_A

4052_A, B

BT_RST, MPKEY, LE

TA

RDS_CLK, DA

PLL_CLK, DATA, TUNED, STIND

TUNER

BU4052

PORTABLE

PT

S/W

AUDIO

IN

BLUETOOTH

AUX BT /

H/P_L/R

E

PB_MUT

EREC_L/R

HA12237F

TAP

REC L/R

L/R, ERASE

B

DECK

Cassette

REC_MUTE

/B

DECK

TAPE_A

BU2090

MOTOR

SOL_A/B

REC_BIAS

Deck ASP

L/R

A

EXPANDER

D+/D-

MIC SIG.

LC)

PT6324

FLT

DRIVER

BA3308

OPAMP (A

FLT

DECK S/W

DISPLAY

H/P

MIC

USB

3-24

Only for training and service purposes

LGE Internal Use Only

2. DVD BLOCK DIAGRAM

P/UP

M

I/F

MICOM

USB CON

I/F

PWM

I/F

POWER

SCI,SDA

EEPROM

DSCK#,CKE,CS0#,RAS0#

DMA[0..11],DB[0..15]

SDRAM

SPI_CS,CLK,DI,KO

SPI

FLASH

DECK MECHANISM

27MHZ

D ,SPINDLE

D ,F ,T

SLE

LOA

3.8V

IC

DRIVE

MOTOR

CD/DVDMDI

CDDVDCT,VRCD,VRDVD

A,B,C,D,E,F,RF

LDO1,LDO2

OPEN/CLOSE

(IP9010)

LRCK,BCK,ADATA[0,3]

CE,CLK,DI,DO, MRST#

USBP, USBN

FOCUS/SLED

AMP_STBY

SPINDLE/TRACKING

MPEG

ESS8390 (176PIN)

3.3V

REG

5V

12V

I/F

MIC

(FRONT)

MCLK,BCK

CS5345

MAIN_A

Y,C,Y/G,

Pb/B,

Pr/R

LRCK,DATA

MPEG

Composite

CVBS

MM1692

Composite

Y, Pb, Pr

Component

3-25 3-26

CIRCUIT DIAGRAMS

1. SMPS(POWER) CIRCUIT DIAGRAM

2007. 12. 24

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R ST

NOTES) Symbol denotes DC chassis ground.

NOTE) Warning

NOTE) Parts that are shaded are critical NOTE) With respect to risk of fire or NOTE) electricial shock.

LGE Internal Use Only

IMPORTANT SAFETY NOTICE

WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG CORPORATION. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT. SPECIAL

COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION.

THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED. THIS WAY, IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED.

NOTE :

1. Shaded( ) parts are critical for safety. Replace only with specified part number.

2. Voltages are DC-measured with a digital voltmeter during Play mode.

3-27 3-38

2. MAIN CIRCUIT DIAGRAM

2008.03.17

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R ST

Only for training and service purposes

LGE Internal Use Only

3-29 3-30

3. AMP CIRCUIT DIAGRAM

LGE Internal Use Only

12

11

10

9

8

7

6

5

4

3

2

1

A

B C D E F G H I J K L M N O P Q R ST

EBY38042101_002.sht

2008.03.17

3-31 3-32

4. MPEG CIRCUIT DIAGRAM

Only for training and service purposes

LGE Internal Use Only

12

11

10

9

8

7

6

5

4

3

2

1

A

2008.01.25

B C D E F G H I J K L M N O P Q R ST

3-33 3-34

5. SERVO CIRCUIT DIAGRAM

2008.01.25

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G H I J K L M N O P Q R ST

LGE Internal Use Only

3-35 3-36

6. I/O CIRCUIT DIAGRAM

Only for training and service purposes

LGE Internal Use Only

12

11

10

9

8

7

6

5

4

3

2

1

A

2008.01.25

B C D E F G H I J K L M N O P Q R ST

3-37 3-38

7. FRONT CIRCUIT DIAGRAM

LGE Internal Use Only

12

11

10

9

8

7

6

5

4

3

2

1

A

B C D E F G H I J K L M N O P Q R ST

2008.01.25

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G HI

3-39 3-40

8. KEY_1 CIRCUIT DIAGRAM (KARAOKE OPTION) 9. KEY_2 CIRCUIT DIAGRAM

2008.01.25

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G HI

Only for training and service purposes

LGE Internal Use Only

3-41 3-42

10. KEY_3 CIRCUIT DIAGRAM 11. MIC CIRCUIT DIAGRAM

LGE Internal Use Only

2008.01.25

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G HI

2008.01.25

A

1

2

3

4

5

6

7

8

9

10

11

12

B C D E F G HI

3-43 3-44

Only for training and service purposes

LGE Internal Use Only

3-45

LGE Internal Use Only

• BU2090

1) BIOCK DIAGRAM

Control circuit

12-bit shift register

Latch

VSS

2

1

3

4

5

6

7

8

DATA

CLOCK

Q0

Q1

Q2

Q3

Q4

16

15

14

13

12

11

10

9

VDD

Q11

Q10

Q9

Q8

Q7

Q6

Q5

Output buffer

(open drain)

Y0

1

Y

2

COMMON

Y

3

Y

3

4

Y

1

5

INH

6

V

EE

7

V

SS

8

16

15

14

13

12

11

10

9

V

DD

X2

X1

X

0

X3

A

B

Y

0

B

Y OUT / IN

INH

V

EE

X

OUT / IN

A

COMMON

Y

2

Y3

Y1

X2

X1

X0

X3

INTERNAL BLOCK DIAGRAM OF IC

• BU4052

1) BIOCK DIAGRAM

3-46

Only for training and service purposes

LGE Internal Use Only

• ES8390

1) BIOCK DIAGRAM

Motor

OP

U

Motor Driv

DVD/

er

CD

SDRAM

(8/16-MB)

EEPROM

ROM/Flas

deo

ES8390

Vi

Audio

Audi

S/

PDIF

o

TV Display

Speakers

Microphone

A/V Receiver

In

Phoenix II

h

VFD Driver

VFD Panel

IR Remote

Flash Memory Cards / HDD

3-47

LGE Internal Use Only

• HA12237F

1) BIOCK DIAGRAM

RECOUT(L)

21222324252627282930

NC

Test mode

(Open for normal use)

20

IREF

19

GND

EQ

18

+

CC

V

ALC DET

17

REC MUTE OFF/

16

15

ALC

)

High/

A/

MUTE ON/OFF

14

(REC Return ON/OFF

13

12

ALC ON/OFF

11

+

1098

EQ

RECOUT(R)

NC

ALC(L)

RECIN(L)

NC

++

PBOUT(L)

TAI(L)

EQOUT(L)

PB-EQ(L)

PB-NF2(L)

MUTE

93/120

(High/Norm)

+

31

AIN(L)

+

PB-NF1(L)

32

ALC(R)

765432

RECIN(R)

NC

+

PBOUT(R)

MUTE

TAI(R)

EQOUT(R)

93/120

(High/Norm)

BA

Return SW

+

BA

1

39

PB-NF1(R)

40

+

RIP

+

33

34

BIN(L)

35

REC-

RETURN

GND

36

37

BIN(R)

38NC

AIN(R)

PB-EQ(R)

PB-NF2(R)

3-48

Only for training and service purposes

LGE Internal Use Only

• HA12237F-E

1) BIOCK DIAGRAM

3-49

LGE Internal Use Only

• IP9010

1) BIOCK DIAGRAM

2) PIN CONNECTIONS

3-50

Only for training and service purposes

LGE Internal Use Only

• LC87F5NC8AVU-QIP-E

1) BIOCK DIAGRAM

3-51

LGE Internal Use Only

2) PIN ASSIGNMENTS

3-52

Only for training and service purposes

LGE Internal Use Only

• 0ILNR00048A

1) BIOCK DIAGRAM

CrOUT

CVBSOUT

YOUT

CYOUT

GND2

CbOUT

COUT

CrIN

VCC

2

5

GND1

CY

IN

15

1

3

Y1IN

BIAS

CbIN

13

11

10

LPF

6.75

MHz

bias

4dB

14

12

9

16

75 Driv

er

2dB

75 Driv

er

8dB

Driver

2dB

Driver

2dB

75 Driv

er

2dB

LPF

6.75

MH

z

clamp

4dB

4

6

7

8

CIN

MU

TE

LPF

13.5

MHz

clamp

4dB

LPF

6.

75MHz

bias

4dB

-6dB

75 Driv

er

2dB

LPF

6.75

MHz

bias

4dB

( TOP VIEW )

VCC

GND1

CYIN C rO

UT

YIN

BIAS

CbIN

CVBSOUT

YOUT

CYOUT

GN

D2

CbOUT

COUT

CrIN

CIN

MUTE

1

2

13

14

15

16

12

11

10

98

7

6

5

4

3

2) PIN CONFIGURATION

3-53

LGE Internal Use Only

PLL

PWM

Modulator

Internal Controls

MLRCK

MBCK

MSDIN[0:3]

SCK/SCL

SO/SDA

SI/I2C_AD0

/CS/I2C_AD

2

PWM2_P/M

PWM3_P/M

PWM4_P/M

PWM5_P/M

PWM6_P

/M

/RESET

OVERLOAD

EXT_MUTE

PWM1_P/M

PWM8_P/M

Internal Clock

SPI/I2C

PWM7_P/M

SLRCK

SBCK

SSDIN[0:3]

PWM_HP_R_P/M

PWM_HP_L_P/M

EPD_ENA

PWM_SWL_P/

M

MIC_LRCK

MIC_BCK

MIC_SDIN

MIC_MC

LK

DMIX_MCLK OLRCK OBCK

DMIX_S

DOUT

PLL_DVDD

PLL_DVSS

PLL_AVDD

PLL_AVSS

DVDD

DVSS

IO_VDD

IO_V

SS

Power Supply

Reset & Powe

r Down

Internal Reset

Serial Audio

Output

interfa

ce

Automatic

Gain

Limiter

Main

Volume

Trim

Volume

Bass

Manager

EQ

Down Mixe

r

Mixe

r

Mic.

Input

Processo

r

Input

Mapper

Sample

Rate

Converte

r

Input

&

Output

MU

X

Host

Interface

(I

2

C, SPI)

Serial Audio

Output

inter

face

Output Mapper

POP

NR

Crystal

Oscillator

XIN

XO

UT

1

2

3

4

8

7

6

5

OUT2

IN2(-)IN1(+)

Vcc-

Vcc+OUT1

IN1(-)

IN2(+)

• MC4580

1) PIN CONFIGURATION

• PS9830B

1) BIOCK DIAGRAM

3-54

Only for training and service purposes

LGE Internal Use Only

2) PIN ASSIGNMENTS

OVERLOAD

EPD_ENA

SO/SDA

SCK/SCL

DVDD

DVSS

SI/I2C_AD0

/CS/I2C_AD2

SPI/I2C

IO_VSS

XIN

XOUT

DMIX_LRCK

DMIX_BCK

DMIX_SDOUT

DVDD

DVSS

_MCLK

DMIX

IO_VDD

IO_VSS

/RESET

TEST_MODE1

TEST_MODE2

SCAN_ENA

TEST_MODE3

IO_VSS

PWM4_P

IO_VSS

PWM8_P

PWM8_M

74

75

6

7

8

7

9

7

0

8

1

8

2

3

8

4

8

5

8

6

7

8

9

8

9

0

1

9

2

9

3

4

9

5

9

6

7

9

8

9

0

1

2

PWM7_P

IO_VDD

71

72

73

PULSUS

3

4

5

PWM7_M

70

6

PWM6_P

IO_VSS

68

69

7

8

PWM6_M

67

9

IO_VSS

IO_VDD

DVDD

66

10111213141516

DVSS

63

64

65

PWM5_P

PWM5_M

61

62

IO_VSS

59

60

171819

PWM4_M

58

IO_VDD

55

56

57

20

2122232425

PWM3_P

PWM3_M

54

PWM2_P

IO_VSS

53

52

PWM2_M

51

50

49

48

47

46

45

44

43

42

41

40

39

38

37

36

35

34

33

32

31

30

29

28

27

26

IO_VSS

PWM1_P

PWM1_M

IO_VDD

PWM_HP_L_P

PWM_HP_L_M

IO_VSS

DVSS

DVDD

PWM_HP_R_P

PWM_HP_R_M

IO_VDD

IO_VSS

PWM_SWL_P

PWM_SWL_M

DVSS

DVDD

MIC_SDIN

MIC_LRCK

MIC_BCK

MIC_MCLK

IO_VDD

IO_VSS

EXT_MUTE

SSDIN3

IO_VSS

PLL_DVSS

PLL_DVDD

IO_VSS

IO_VDD

MLRCK

MSDIN0

MSDIN1

IO_VSS

PLL_AVSS

PLL_AVDD

DVSS

DVDD

MBCK

SBCK

MSDIN2

MSDIN3

SLRCK

IO_VSS

SSDIN0

IO_VDD

SSDIN1

SSDIN2

3-55

LGE Internal Use Only

• PT6324

1) BIOCK DIAGRAM

DIN/DOUT

CLK

ST

OSC

LED1

Control

Serial

Data

ace

Interf

B

LED

er

Driv

Display Memory

Timing Genera

Key Matrix Memory

to r

Segment Driver

SG1/KS1 SG2/KS2 SG3/KS3 SG4/KS4

SG5/KS5 SG6/KS6 SG7/KS7 SG8/KS8

SG9/KS9 SG10/KS10

SG11 /KS11 SG12/KS12 SG13/KS13 SG14/KS14 SG15/KS15 SG16/KS16 SG17 SG18

SG19 SG20

SG21 SG22

SG23 SG24

K1 K2

Dimming Circ

uit

VDD GND VEE

Grid

Driv

er

GR1 GR2

GR3 GR4 GR5 GR6

GR7 GR8 GR9 GR1 0

GR11 GR1 2 GR1 3 GR1 4

GR1 5

16

GR

3-56

Only for training and service purposes

LGE Internal Use Only

2) PIN CONFIGURATION

GND

VDD

VEE

GR1

GR2

GR4

GR5

GR6

GR7

GR8

GR9

GR3

GR10

CLK

DIN/DOUT

STB

LED1

K1

K2

OSC

GND

VDD

SG1/KS1

SG2/KS2

SG3KS3

SG4/KS4

52 50 49 48

1

2

3

4

5

6

7

8

9

10

11

12

13

14

16

47

PT6324

18 19 20

17

46 45

21 22

44

43

23

42 41

25 2615

24

4051

39

38

37

36

35

34

33

32

31

30

29

28

27

GR11

GR12

GR13

GR14

GR15

GR16

SG24

SG23

SG22

SG21

SG20

SG19

SG18

SG17

SG6/KS6

SG7/KS7

SG8/KS8

SG5/KS5

SG9/KS9

SG11/KS11

SG10/KS10

SG12/KS12

SG14/KS14

SG13/KS13

SG15/KS15

SG16/KS16

3-57

LGE Internal Use Only

• TAS5352

1) BIOCK DIAGRAM

2nd-Order L-C

Output Filter

for Each

Half-Bridge

Bootstrap

Capacitors

2-Channel

H-Bridge

BT

L

Mode

System

Microcontroller

OUT_

A

OUT_

B

OUT_

C

OUT_

D

BST_A

BST_B

BST_C

BST_D

RESET_A

B

RESET_CD

System

Power

Supply

Hardwire

Mode

Control

PVDD

GVDD (12 V)/VDD (12 V)

GND

Hardwire OC Limit

M1

M3

PVDD

Power

Supply

Decoupling

35.5 V

12

V

GND

VAC

PWM_A

PWM_C

PWM_D

PWM_B

V

ALID

M2

Left-

Channel

Output

Right-

Channel

Output

Inpu

t

H-Bridge 1

Inpu

t

H-Bridge 2

GVDD

VDD

VREG

Power Supply

Decoupling

44 4

Bootstra

p

Capacitors

2nd-Order L-C

Output Filter

for Each

Half-Bridge

Output

H-Bridge 2

Output

H-Bridge

1

OTW

SD

TAS5518

PVDD_A, B, C, D

GND_A, B, C, D

GVDD_A, B, C, D

GND

VDD

VREG

AGND

OC_ADJ

3-58

Only for training and service purposes

LGE Internal Use Only

3-59 3-60

LGE Internal Use Only

CIRCUIT VOLTAGE CHART

IC MAIN

IC 100 (audio Micom) LC87F5NC8A

1 1.31 2 0.35 3 0.21 4 3.81

5 0.86 6 1.09 7 4.44 8 5.02 9 2.34

10 2.54 11 0.01 12 2.45 13 2.55 14 5.07 15 5.02 16 4.98 17 4.99 18 4.9 19 0.01 20 0.9

21 0.83 22 4.98 23 0.02 24 0.23 25 3.37 26 5.03 27 5.03 28 5.03 29 4.64 30 0.01 31 0.01 32 0.01 33 0.01 34 5.03 35 0.01 36 5.03 37 0.01 38 5.04 39 0.01 40 5.04 41 0.32 42 0.39 43 0.01 44 0.01 45 0.01 46 4.95 47 0.23 48 0.27 49 0.26 50 0.28 51 0.3 52 0.28 53 0.39 54 5.02 55 5.04 56 0.01 57 0.81 58 0.02 59 0.01

PIN NO.

60 0.01 61 0.21 62 0.29

63 0.57 64 0.64 65 2.03 66 2.08 67 2.09 68 2.14 69 0.01 70 5.52 71 5.01 72 3.23 73 3.9 74 2.04 75 2.12

76 2.11 77 5.04 78 5.04

79 5.01 80 5.01 81 5.04 82 5.04 83 4.22 84 0.01 85 0.02 86 2.82 87 0.07 88 0.01 89 5.04 90 0.12 91 0.12 92 0.1 93 0.03 94 2.27 95 2.08 96 4.74 97 4.82 98 0.01 99 0.01

100 0.01

IC 604 Pulsus (PS9830)

1 0.001 2 0.001 3 1.93 4 3.46 5 0.001 6 1.95 7 0.001 8 0.001

9 0.001 10 3.44 11 1.79 12 1.8 13 1.9 14 0.001 15 0.03 16 1.69 17 1.68 18 1.76 19 1.68

VOLT

PIN NO.

VOLT

PIN NO.

VOLT

PIN NO.

VOLT

EE Mode (V)

20 1.71 21 0.001 22 3.44 23 0.02 24 0.02 25 0.02 26 0.02 27 0.001 28 0.001 29 3.44 30 1.67 31 1.71 32 1.71 33 0.01 34 1.9 35 0.001 36 1.71 37 1.71 38 0.001 39 3.44 40 1.71 41 1.71 42 1.9 43 0.001 44 0.001 45 1.71 46 1.71 47 3.44 48 1.71 49 1.71 50 0.001 51 1.71 52 1.71 53 0.001 54 1.71 55 1.71 56 3.44 57 0.001 58 1.71 59 1.71 60 0.001 61 1.71 62 1.71 63 0.002 64 0.001 65 3.44 66 1.9 67 1.71 68 1.71 69 0.001 70 1.71 71 1.71 72 3.44 73 0.001 74 1.71 75 1.71 76 3.37 77 3.44 78 4.98 79 4.98 80 1.9

81 0.002 82 0.002 83 0.002 84 0.002 85 0.002 86 1.71 87 1.76 88 1.69 89 1.68 90 1.68 91 1.9 92 0.002 93 1.66 94 3.44 95 0.002 96 5.01 97 0.002 98 0.002 99 0.002

100 0.002

PIN NO.

EE Mode (V)

IC 200 (BU4052)

1 0.01 2 0.01 3 0.01 4 0.01 5 0.01 6 0.01 7 -6.29 8 0.01

9 0.01 10 0.01 11 0.01 12 0.01 13 0.01 14 0.01 15 0.01 16 5.96

IC801 (MC4580)

1 0.06

2 0.04

3 0.04

4 -12.23

5 0.04

6 0.06

7 0.06

8 11.58

IC802 (MC4580)

1 0.01

2 0.01

3 0.03

4 -11.28

5 0.03

6 0.02

7 0.01

8 11.26

IC601 (MSGEQ7N)

1 5.14

2 0.01

3 0.4

38 1.5 39 0.04 40 1.19 41 3.4 42 3.4 43 3.19 44 3.19 45 3.29 46 0.96 47 0.65 48 3.4 49 0.09 50 4.08 51 0.01 52 3.35 53 4.87 54 3.37 55 1.69 56 1.65 57 1.7 58 1.65 59 3.38 60 3.38 61 0.01 62 3.38 63 3.38 64 1.36 65 3.38 66 3.38 67 0.01 68 1.5 69 3.37 70 3.38 71 1.65 72 4.29 73 1.8 74 0.01 75 3.35 76 0.02 77 2.36 78 1.31 79 3.38 80 0.94 81 3.35 82 0 83 0.93 84 0.9 85 0.76 86 3.36 87 3.4 88 0.01 89 3.4 90 0.02 91 0.02 92 0.59 93 1.08 94 1.09 95 0 96 1.69 97 0.02 98 0.02

99 3.37 100 0.01 101 0.02 102 0.02 103 1.68 104 1.5 105 1.81 106 1.75 107 0.01 108 3.35 109 0.01 110 0.02 111 3.37 112 0.01 113 3.38 114 0.01

115 3.36 116 0.01 117 0.63 118 0.56 119 1.97 120 1.65 121 1.95 122 1.7 123 0.08 124 1.29 125 3.4 126 3.41 127 2.14 128 1.54 129 0.59 130 3.29 131 0.09 132 0.5 133 3.37 134 0.02 135 1.7 136 1.7 137 1.88 138 1.88 139 1.88 140 1.88 141 1.84 142 1.84 143 2.13 144 2.14 145 1.65 146 0.02 147 1.71 148 1.71 149 1.71 150 1.73 151 1.35 152 3.37 153 0 154 0 155 1.53 156 3.35 157 0 158 1.5 159 1.23

PIN NO.

EE Mode (V)

4 0.04 5 2.2 6 2.58 7 0.08 8 2.54

IC103(S24CS1)

1 0.01 2 0.01 3 0.01 4 0.01 5 5.04 6 5.04 7 0.01 8 5.04

IC102(KIA70)

1 5.04 2 0.01 3 5.03

IC101(KIA70)

1 5.23 2 0.01 3 4.08

IC DVD

IC 501 Mpeg (ES8390)

1 3.37 20 3 0.22 4 3.26 5 3.2 6 3.3 7 3.46 80

9 1.45 10 0.02 11 0.92 12 0.94 13 0.86 14 3.35 15 0 16 1.5 17 0.71 18 0.91 19 0.71 20 0.71 21 0.6 22 0.83 23 0.89 24 0.77 25 0.76 26 0.68 27 0.87 28 0.95 29 0 30 3.35 31 1.11 32 3.35 33 1.17 34 0.42 35 0.29 36 3.35 37 0.02

3-61 3-62

Only for training and service purposes

LGE Internal Use Only

PIN NO.

EE Mode (V)

160 1.23 161 1.38 162 1.53 163 3.47 164 0 165 1.79 166 1.38 167 2.62 168 0 169 0.02 170 1.6 171 0.56 172 0.55 173 0.09 174 0.09 175 0.03 176 0.09

PIN NO.

PB Mode (V)

IC 501 Mpeg (ES8390)

1 3.36

20 14 3.36 15 0 29 0 30 3.36 36 3.36 37 0 38 1.51 51 0 52 3.36 66 3.36 67 0 68 1.51 72 4.31 74 0 75 3.36 81 3.4 82 0 87 3.25 88 0 89 3.4 95 0 99 3.36

100 0 104 1.51 107 0 108 3.36 115 3.35 116 0 122 1.7 127 2.15 133 3.35 134 0 153 0 154 0 155 1.51 156 3.36 157 0 158 1.51 163 3.36

PIN NO.

PB Mode (V)

164 0

IC401 (IP9011)

1 2.12 2 2.16 3 2.05 4 2.18 5 4.9 6 1.72 7 1.71

GND 0

8 3.29

9 1.08 10 0 11 0 12 4.89 13 0.21 14 0.21 15 3.39 16 0.826 17 2.08 18 2.18 19 4.9 20 1.72 21 1.41

GND 0

22 0 23 1.7 24 0.16 25 0 26 1.23 27 2.21 28 1.56

PIN NO.

EE Mode (V)

IC401 (IP9011)

1 0.12

2 0.11

3 0.1

4 0.09

5 4.97

6 1.7

7 1.71

GND 0

8 0.02

9 1.09 10 0 11 0 12 4.97 13 0.09 14 0.09 15 0.04 16 0.36 17 0.11 18 0.11 19 4.97 20 1.7 21 1.7

GND 0

22 0 23 1.7 24 0.08

PIN NO.

EE Mode (V)

25 0 26 1.28 27 2.21 28 1.56

IC502

1 3.39 2 0.6 3 3.39 4 0.71 5 0.71 60 7 0.91 8 0.71

9 3.38 10 0.86 11 0.94 12 0 13 0.92 14 3.38 15 0.02 16 0 17 3.3 18 3.2 19 3.26 20 0.09 21 0.03 22 0.09 23 0.09 24 0.55 25 0.56 26 1.6 27 3.38 28 0.01 29 1.38 30 1.53 31 1.79 32 1.38 33 2.62 34 0 35 0.02 36 0.02 37 3.38 38 1.45 39 0.02 40 0 41 0.01 42 0.83 43 3.38 44 0.89 45 0.77 46 0.01 47 0.76 48 0.68 49 3.39 50 0.87 51 0.95 52 0.01 53 1.11 54 0.01

IC503

1 3.16

PIN NO.

EE Mode (V)

2 1.65 3 3.4 4 0.01 5 0.63 6 2.51 7 3.4 8 3.41

IC504

1 0.01 2 0.01 3 0.01 4 0.01 5 0.19 6 3.47 70 8 3.48

IC TIMER

IC303

1 4.77

2 3.82 3 3.76 4 2.18 5 0.05 6 0.05 7 2.84 80 9 5.06

10 -9.79 11 -19.5 12 0.019 13 -21.2 14 -21.22 15 -19.59 16 -24.62 17 -24.62 18 -21.23 19 -19.51 20 -21.14 21 -24.48 22 -19.59 23 -17.92 24 -24.55 25 -24.62 26 -24.78 27 -24.76 28 -24.74 29 -24.77 30 -24.78 31 -24.79 32 -24.77 33 -24.8 34 -23.33 35 -23.29 36 -23.28 37 -23.28 38 -23.28 39 -23.28 40 -23.29 41 -23.29 42 -23.28 43 -23.28

PIN NO.

EE Mode (V)

44 -23.29 45 -23.3 46 -23.27 47 -23.27 48 -23.27 49 -24.92 50 -24.98 51 5.06 52 0

IC301

10 20 30 4 3.85 5 0.6 6 0.61 7 4.96 8 0.48

9 0.12 10 0.09 11 0.01 12 4.85 13 4.44 14 4.46 15 0.09 16 5.53

IC302

1 1.76

2 0.003

3 1.76

40

50

6 10.21

7 1.76

8 0.017

9 1.76

3-63 3-64

LGE Internal Use Only

AUDIO MAIN

NO VALUE CAPACITOR (UF)

VOLTAGE_SPEC POSITIP (+) NEGATIP (-) GAP MARGIN

C109 220 10V 5.09V 0.006V 5.084V 4.916V C111 100 10V 5.01 0.006 5.004V 4.996V C116 2.2 50V 5.09V 0.006V 5.084V 44.916V C635 10 16V - - 16V C639 10 16V 1.92V 0.001V 1.919V 14.081V C647 1000 6.3V 3.44 0.001 3.439V 2.57V C665 470 10V 1.9 0.01 1.89V 8.11V C690 100 16V - - 16V C803 4.7 50V 2.48V 0.54V 1.94V 48.06V C805 4.7 50V 2.49V 0.52V 1.97V 48.03V C810 47 16V 0V -12.21V 12.21V 3.79V C811 47 16V 11.48V 0V 11.48V 4.52V C814 10 16V - - 16V C815 47 16V - - 16V C818 10 16V 1.41V 0V 1.41V 14.59V C824 47 16V - - 16V C825 10 16V 5.92V 0V 5.92V 10.08V C827 10 50V 0V -6.29V 6.29V 43.71V C840 100 16V - - 16V C846 220 10V 0 0 10V 0V C848 220 10V 0.002V 0.001V 0.001V 9.999V C852 10 16V 1.7 0.026 1.674V 14.326V C853 10 16V 1.7 0.025 1.675V 14.326V C859 10 16V 1.7 0.024 1.676V 14.324V C862 220 10V - - 10V C725 10 50V 11.84V 0.001V 11.839V 38.161V C707 47 50V 11.82V 0.001V 11.819V 38.181V C836 220 16V 9.63V 0.001V 9.629V 6.371V C741 1000 50V 34.51V 0.008V 34.502V 15.498V C703 1000 50V 34.5V 0.007V 34.493V 15.507V

DVD MAIN

NO VALUE CAPACITOR (UF)

VOLTAGE_SPEC POSITIP (+) NEGATIP (-) GAP MARGIN

C409 100 16V 4.99V 0.02V 4.97V 11.03V C408 100 16V 4.99V 0.02V 4.97V 11.03V C512 47 6.3V 3.38V 0.02V 3.36V 2.64V C511 220 10V 3.38V 0.02V 3.36V 6.64V C517 100 16V 3.4V 0.02V 3.38V 12.62V C515 10 16V 3.4V 0.02V 3.38V 12.62V C406 47 6.3V 2.1V 0.02V 2.08V 4.22V C401 47 6.3V 4.99V 0.02V 4.97V 1.03V C405 4.7 6.3V 4.99V 0.02V 4.97V 1.33V C404 100 16V 4.99V 0.02V 4.97V 11.03V C410 100 16V 3.42V 3.41V 0.01V 15.99V C407 100 16V 3.42V 3.41V 0.01V 15.99V C510 100 16V 3.42V 0.01V 3.41V 12.59V C516 100 16V 3.42V 0.01V 3.41V 12.59V

C500 100 16V 1.52V 0.02V 1.5V 14.5V C5C5 10 16V 1.11V 0.01V 1.1V 14.9V C5C4 10 16V 1.11V 0.01V 1.1V 14.9V

C231 47 6.3V 3.43V 0.02V 3.41V 2.89V

C232 47 6.3V 4.98V 0.01V 4.97V 1.33V

C242 10 16 2.49V 0.01V 2.48V 13.52V

C241 47 6.3V 4.97V 0.01V 4.96V 1.34V

C223 10 16V 2.5V 0.01 2.49V 13.51V

C230 47 6.3V 5V 0.01 4.99V 1.31V

C224 47 6.3V 0.95 0.95 0V 6.3V

TIMER

NO VALUE CAPACITOR (UF)

VOLTAGE_SPEC EEMODE

POSITIP (+) NEGATIP (-) GAP MARGIN

C323 1 50V 0V 0V 0V 50V C334 100 16V 10.19V 0V 10.19V 5.81V C341 100 16V 5.05V 0V 5.05V 10.95V C315 22 16V 1.785V 0V 1.785V 14.215V C351 47 16V 11.81V 0V 11.81V 4.19V C327 47 35V 0V -21.53V 21.53V 13.47V C338 47 35V 0V -25.03V 25.03V 9.97V C348 47 35V 0V -17.79V 17.79V 17.21V C377 100 10V 4.94V 0V 4.94V 5.06V C382 1 50V 0V 0V 0V 50V C383 1 50V 0V 0V 0V 50V

3-65 3-66

Only for training and service purposes

LGE Internal Use Only

PRINTED CIRCUIT BOARD DIAGRAMS

1. MAIN P.C. BOARD DIAGRAM ( TOP VIEW )

3-67 3-68

LGE Internal Use Only

MAIN P.C. BOARD DIAGRAM ( BOTTOM VIEW )

3-69 3-70

Only for training and service purposes

LGE Internal Use Only

2. DVD P.C. BOARD DIAGRAM ( TOP VIEW )

3-71 3-72

LGE Internal Use Only

DVD P.C. BOARD DIAGRAM ( BOTTOM VIEW )

3-73 3-74

Only for training and service purposes

LGE Internal Use Only

3. SMPS P.C. BOARD DIAGRAM

NOTE: Warning

Parts that are shaded are critical With respect to risk of fire or electrical shock.

3-75 3-76

LGE Internal Use Only

4. FRONT P.C. BOARD DIAGRAM

EAX42692302

3-77 3-78

EAX42692702

EAX42692902

EAX42692802

EAX42692602

Only for training and service purposes

LGE Internal Use Only

5. KEY_1 P.C. BOARD DIAGRAM (KARAOKE OPTION) 6. KEY_2 P.C. BOARD DIAGRAM

8. MIC P.C. BOARD DIAGRAM7. KEY_3 P.C. BOARD DIAGRAM

KEY1

EAX42692702

EAX42692802

EAX42692902

EAX42692602