LG MCD112 A0U Diagram

MINI Hi-Fi SYSTEM

SERVICE MANUAL

MODEL : MCD112 (MCS112F)

CAUTION

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

.

Website http://biz.lgservice.com

MODEL : MCD112 (MCS112F)

SERVICE MANUAL

P/NO : AFN72956656 APRIL, 2009

Internal Use Only

CONTENTS

SECTION 1 GENERAL

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

• NOTES REGARDING HANDLING OF THE PICK-UP

• NOTES REGARDING COMPACT DISC PLAYER REPAIRS

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

LOCATION OF USERS CONTROLS....................1-5

SPECIFICATIONS .................................................1-7

SECTION 2 EXPLODED VIEWS

CABINET EXPLODED VIEW................................2-1

TAPE DECK MECHANISM EXPLODED VIEW....2-3

1. TAPE DECK MECHANISM

(A/S & A/S : RIGHT A/S DECK) ..................2-3

2. TAPE DECK MECHANISM

(A/S & A/S : LEFT A/S DECK) ....................2-5

CD MECHANISM EXPLODED VIEW ...................2-7

3. PS9829B ....................................................3-15

4. PT6324 .......................................................3-15

5. STR-S6757IF1905......................................3-16

6. TAS5142 .....................................................3-17

7. U1739EJ2V1UD00/KF2_E .........................3-18

WIRING DIAGRAM .............................................3-19

BLOCK DIAGRAMS ...........................................3-21

1. SMPS BLOCK DIAGRAM .........................3-21

2. MAIN & FRONT BLOCK DIAGRAM .........3-23

SCHEMATIC DIAGRAMS ...................................3-25

1. SMPS SCHEMATIC DIAGRAM ................3-25

2. MAIN SCHEMATIC DIAGRAM..................3-27

3. AMP SCHEMATIC DIAGRAM ...................3-29

4. DECK SCHEMATIC DIAGRAM.................3-31

5.

FRONT SCHEMATIC DIAGRAM

6.

KEY-L SCHEMATIC DIAGRAM

7.

KEY-R SCHEMATIC DIAGRAM

PRINTED CIRCUIT BOARD DIAGRAMS...........3-37

1. MAIN P.C.BOARD .....................................3-37

2. FRONT P.C.BOARD ..................................3-41

3. SMPS P.C.BOARD ....................................3-43

4. KEY-L P.C.BOARD ....................................3-44

5. KEY-R P.C.BOARD ...................................3-44

.................3-33

...................3-35

...................3-36

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

MODEL : MCS112F.........................................2-9

PACKING ACCESSORY VIEW...........................2-13

SECTION 3 AUDIO PART ELECTRICAL

AUDIO ELECTRICAL

TROUBLESHOOTING GUIDE..............................3-1

1. POWER (SMPS) .........................................3-1

2. P-SENS .......................................................3-2

3. VKK CHECK................................................3-2

4. MICOM PART CHECK I ..............................3-2

5. MICOM PART CHECK II .............................3-3

6. IC103(KS4CD21CS) CHECK......................3-4

7. FLD DISPLAY CHECK ................................3-5

8. PWM MODULATION PART CHECK ...........3-6

9. POWER AMP PART CHECK ......................3-7

10. AUX FUNCTION CHECK ............................3-8

11. TUNER FUNCTION CHECK .......................3-9

12. TAPE FUNCTION CHECK ........................3-10

13. TAPE PLAY PART CHECK ........................3-11

14. TAPE REC PART CHECK .........................3-12

INTERNAL BLOCK DIAGRAM OF ICs..............3-13

1. ES6838.......................................................3-13

2. HA12237F. ..................................................3-14

SECTION 4 CD PART ELECTRICAL

CD ELECTRICAL

TROUBLESHOOTING GUIDE..............................4-1

1. CD PART TROUBLESHOOTING................4-1

2. USB PART TROUBLESHOOTING..............4-9

WAVEFORMS OF MAJOR CHECK POINT .......4-10

SCHEMATIC DIAGRAMS ...................................4-13

1. CD SCHEMATIC DIAGRAM .....................4-13

2. USB SCHEMATIC DIAGRAM ...................4-15

PRINTED CIRCUIT BOARD DIAGRAM.............4-17

CD P.C.BOARD .............................................4-17

SECTION 5 REPLACEMENT PARTS LIST

............................................5-1

1-1

LGE Internal Use Only

SECTION 1 GENERAL

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.

LGE Internal Use Only

1-2

Only for training and service purposes

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 (1MΩ)

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.

CLEARING MALFUNCTION

You can reset your unit to initial status if malfunction occur(button malfunction, display, etc.). Using a pointed good conductor(such as driver), simply short the RESET jump wire on the inside of the volume knob for more than 3 seconds. If you reset your unit, you must reenter all its settings(stations, clock, timer)

NOTE: 1. To operate the RESET jump wire, pull the volume rotary knob and release it.

2. If you wish to operate the RESET jump wire, it is necessary to unplug the power cord.

1-3

LGE Internal Use Only

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.

LGE Internal Use Only

1-4

Only for training and service purposes

LOCATION OF USERS CONTROLS

FRONT PANEL

1

2

6

7

3

4

5

1. POWER

You can set up the unit into an economic power save mode. In the power-on status, press and hold

(POWER) for about 3 seconds. To cancel

power save mode, press (POWER).

2. ST./MONO

Press ST./MONO. This will change the tuner from stereo to mono and usually improve the reception.

3. MP3 OPT. (MP3 Optimizer)

This function is optimized for compressible MP3 files so that it improves the bass sound.

4. DEMO

Press DEMO in power off state to demonstrate the function on display window. To cancel it, press or DEMO again.

5. Headphone jack

Connect a headphone plug (ø3.5 mm) into the jack to listen to the sound through headphones (not supplied).

8

9

10

11

6. CD tray

7. XTS - PRO

The function creates the optimum sound for you to play of the original sound. Each time you press XTS - PRO, “XTS -- PRO ON” or “XTS -- PRO OFF” is displayed in turn. (The XTS Pro function will not be operated when a headphone has been connected.)

8. D.SKIP

If more than one portable USB player is connected to the system at the same time, press D.SKIP to select one of them.

9. AUX

You can connect many other types of audio or audio visual device to the system via the auxiliary sockets (AUX IN) on the back of the player.

10.VOLUME

Control the volume when using any function.

11. USB connector - OPTIONAL

Connect a remote USB compatible player here.

1-5

LGE Internal Use Only

REMOTE CONTROL

1

2

3

4

5

6

7

8

9

10

11

12

13

14

1. Search for a folder of MP3/WMA files

When a CD containing MP3/WMA files in several folders is being played, press PRESET/FOLDER to select the folder you want to play.

2. Fall asleep while listening to your player

Firstly, start a radio station or music. Press SLEEP on the remote one or more times to select a delay of between 10 and 180 minutes, after which the player will turn off.

3. Use when playing a CD

4. Listen to your tracks again and again

Press REPEAT once to repeat the track currently playing. Press REPEAT twice to repeat the whole CD, or if you’re listening to the whole folder of MP3/WMA CD . The display will show what is being repeated.

5. Use when playing a cassette tape

6. Sound quality adjustment

You can select a desired sound mode by using EQ.

7. Play any track on a CD

Press the corresponding number buttons on the remote control.

8. Temporarily stop the sound

Press the button again to return to the sound.

9. To change the functions

Change the functions between FM, AM, CD, AUX, USB or TAPE

10.Dimm the display light

11. For storing radio stations

If you have saved radio stations using PROGRAM/ MEMO, you can scroll through them and select one (see Listening to the radio).

12.eXtreme Dynamic Sound System

Reinforce the treble, bass and surround sound effect. XDSS ON will show in the display. Press again for XDSS OFF.

13.RANDOM

Press RANDOM, play tracks/files you can in a random order or cancel it.

14.See information about your music

MP3/WMA files often come with tags. The tag gives the Title, Artist or Album. Press INFO while a file is playing to see this information. If there are no tags, “NO ID3 TAG” or “NO WMA TAG” will show.

LGE Internal Use Only

1-6

Only for training and service purposes

SPECIFICATIONS

• GENERAL

Net Weight 5.57kg (MCD212 Model)

5.36kg (MCD112 Model)

External dimensions (WxHxD) 170 x 243 x 282mm

• TUNER

FM Tuning Range 87.5 ~ 108.0MHz or 65 ~ 74MHz,

87.5 ~ 108.0MHz

AM Tuning Range 522 ~ 1620kHz or 520 ~ 1720kHz

• AMPLIFIER

Output Power 100W + 100W (MCD212 Model)

50W + 50W (MCD112 Model) T.H.D 0.5% Frequency Response 40 ~ 20000Hz Signal-to-noise ratio 75dB

• CD

Frequency response 40 ~ 20000Hz Signal-to-noise ratio 75dB Dynamic range 75dB

• SPEAKERS

MCS212F Type Bass Reflex 2 Way 2 Speaker

Impedance 4Ω Rated Input Power 100W Max. Input Power 200W Net Dimensions (WxHxD) 220 x 342 x 270mm Net Weight (1EA) 3.46kg

MCS112F Type Bass Reflex 2 Way 2 Speaker

Impedance 4Ω Rated Input Power 50W Max. Input Power 100W Net Dimensions (WxHxD) 200 x 337 x 228mm Net Weight (1EA) 2.92kg

1-7

LGE Internal Use Only

MEMO

LGE Internal Use Only

1-8

Only for training and service purposes

SECTION 2 EXPLODED VIEWS

255

256

E

F

G

I

J

H

A

B

M

N

A

J

K

H

L

K

M

I

C

G

E

F

D

A26

A41

A47

A46

266

263

305

451

267

289

456

450

264

458

450

290

454

CABLE2

CABLE4

CN806

P9701

P9702

260

CD

MAIN

SMPS

291

257

255

259

253

254

450

N

C

450

A00

CABLE1

CABLE5

CN201

CABLE3

A43

A40

FRONT

CABINET EXPLODED VIEW

2-1 2-2

LGE Internal Use Only

TAPE DECK MECHANISM EXPLODED VIEW

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

BRASS MOTOR PULLEY MAYBE CHANGED FOR WOW FLUTTER WHEN NECESSARY

009

003

A00

001

002

007

008

022

006

016

015

017

023

018

019

025

020

A01

RING FW MAYBE ADDED FOR WOW FLUTTER WHEN NECESSARY

011

LGE Internal Use Only

009

013

A02

2-3 2-4

Only for training and service purposes

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

019

A00

003

009

007

008

016

017

022

018

023

015

020

RING FW MAYBE ADDED FOR WOW FLUTTER WHEN NECESSARY

024

011

009

013

A03

2-5 2-6

LGE Internal Use Only

CD MECHANISM EXPLODED VIEW

416

151

159

165

164

417

166

417

167

416

177

175

172

170

419

417

418

190

189

188

A30

A32

A26

181

187

186

184

421

185

156

155

153

173

168

163

162

441

440

422

A35

417

LGE Internal Use Only

2-7 2-8

Only for training and service purposes

SPEAKER EXPLODED VIEW

MODEL : MCS112F

A80L

A80R

A80AL

A80AR

850L

850R

853

A80B

855

856

854

851

852

WIRE80

2-9 2-10

LGE Internal Use Only

MEMOMEMO

LGE Internal Use Only

2-11 2-12

Only for training and service purposes

PACKING ACCESSORY VIEW

2-13

LGE Internal Use Only

MEMO

LGE Internal Use Only

2-14

Only for training and service purposes

SECTION 3 AUDIO PART ELECTRICAL

AUDIO ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER (SMPS)

POWER (SMPS)

YES

Check the fuse

F901

YES

Check

the DC V of C905.

If DC V is over

400V

YES

Chcek the

DC V of C909, C903,

C921 If DC V is in 14~19V

and it is steady.

YES

Check the

DC V of C981, C945.

If DC V is 6.1V

NO

Replace the fuse

Check BD901, LF901, 902

Check IC901, 902

YES

Check short of

P9701, P9702 line

Check short of P9702 line

NONO

Replace IC 901,902

YES

Chcek the

DC V of C950, C951

If DC V is in

31.5V

YES

OK

NO

Check short of P9701 line

3-1

LGE Internal Use Only

2. P-SENS

P-SENS

YES

Check

the PIN6 of P9702

If DC V is over 5.6V

3. VKK CHECK

VKK check

Check

the PIN3 of P9702

If DC V is over -28V ±2

OK

YES

NO

Check power circuit Trouble shooting

4. MICOM PART CHECK I

MICOM part check I

YES

Check P-SENS

(P7904)_PIN6.

YES

Check both

end voltage of IC101

(KIA7042).

YES

Check voltage of IC100

78KO/KF2_PIN1.

YES

OK OK

LGE Internal Use Only

NO

SMPS troubleshooting.

NO

Check if IC101(KIA7042) of output voltage is over 4.3V.

Refer to

Check

if input voltage of

IC101(KIA7042) is

over 5V.

YES

NO

3-2

Check the

periphery of IC101

(KIA7042).

YES

Only for training and service purposes

NO

Replace IC101

(KIA7042).

5. MICOM PART CHECK II

MICOM part check II

YES

voltage of P7904_PIN5

Check if

is 5.6V.

YES

Check

both end voltage of

D101

YES

Check

Q101_ emitter/collector

5V.

YES

NO

NO NO

Refer to

SMPS troubleshooting.

Check if output of

D101(1SR35) is 5V.

YES

Check D101.

YES

OK

Check Q102_base

0.6V HIGH.

YES

NO

Replace D101.

Check if output of IC101

(KIA7042) is over 4.3V.

YES

Check if IC103_PIN8 and

IC100_PIN19, 20, 59 are 5V.

YES

X101 : 32.768kHz

X100 : 9.8304MHz

Check the operation.

YES

OK

Q102_collector 0.6V LOW.

Check Q102.

OK

YES

3-3

NO

Check IC101.

YES

OK

Replace Q102.

NO

Replace IC101.

LGE Internal Use Only

6. IC103(KS4CD21CS) CHECK

Check

IC100(78KOKF2)_

PIN 22, 24

YES

PIN22

DATA PIN24 CLK

YES

OK

Check micom

voltage 5V.

YES

Check micom.

YES

OK

NONO

NO

Refer to

micom troubleshooting

Replace micom.

LGE Internal Use Only

3-4

Only for training and service purposes

7. FLD DISPLAY CHECK

FLD display check

YES

P7904_PIN1, 2, 3 voltage

Check

input.

YES

Check if both end votage

of F1, F2 are over 3.7V.

VKK : over 26V.

YES

Check P3702

connection and power.

Pin1 : FL-22 Pin2 : FL+26

Pin3 : VKK- over

26V.

YES

Check

IC301(PT6324) voltage.

Pin50 VKK : -26V

PIN9.52 : +5V

NO

Refer to SMPS

Check P3702 connection.

YES

Check each

PIN voltage.

YES

OK

If voltage is not 5V,

check input and output

of D319(1SR35).

YES

NO

Replace P3702.

YES

IC100 - >

Check IC301

DATA communication.

PIN PIN 75PIN - > 3PIN STB 76PIN - > 2PIN D 78PIN - > 1PIN

CLK

YES

NO

Check IC301.

YES

OK

IC100

75 PIN - > STB

77 PIN - > 4PIN DI

78 PIN - > 1PIN CLK

Check data output.

YES

76 PIN - > DO - - >

Check DATA in Check IC100.

YES

Check IC100.

YES

OKOK

3-5

NO

Replace IC301.

Replace IC100FLD light on?

LGE Internal Use Only

8. PWM MODULATION PART CHECK

PWM modulation

part check

YES

P7905_PIN9

3.3V checking

NO

SMPS troubleshooting.

Refer to

YES

Check IC604(PS9829)

VDD PIN voltage(3, 7, 8,

10, 22, 29, 39, 47, 56, 65,

72, 94).

Check X601_PIN2 3.3V.

YES

Check

X601 12.288MHz

operation.

YES

Check IC605_

PIN3 input and PIN2

output.

YES

IC604

(PS9829) PIN86 CLK

input check

YES

NO

Check X601

12.288MHz.

YES

OK

Check IC605_

PIN8 3.3V.

YES

Check IC605_

PIN3 input

YES

Check IC605_

PIN2 output

YES

OK

Check R680

(470Ω) output.

YES

OK

NO

Replace X601.

Check FB614

BEAD input, output and

voltage.

YES

OK

Check X601

2.288MHz YES

Replace IC605.

Replace R680.

NO

Replace FB614

Replace X601.

OK

Check

IC100(78KOKF2)

21->PWM_CLK

22->PWM_DATA

43->PWM_REST

output.

YES

Check IC604

(PS9829) DATA input.

78 PIN->DATA

79 PIN->CLK

YES

Check PWM

modulator output.

FL:75(+)74(-)

FR:71(+)70(-)

YES

LGE Internal Use Only

NO

LINE registor output.

DATA:R671, CLK:R670

RST:R665

DVD ASS`Y(PS9829)

communication

IC604(PS9829) DATA

NO

Check IC604(PS9829).OK

Check

YES

OK

Check

(P7403).

YES

Check

input.

YES

OK

NO

Replace R670, R671

CD troubleshooting.

3-6

and R665

Refer to

Check each LINE

registor output.

Only for training and service purposes

9. POWER AMP PART CHECK

Power AMP part check

YES

P7905_3PIN : +12V, PIN13, 14, 15 : 35V.

YES

Check each IC700, 701, 702, 703

PIN21, 26, 29, 34 input voltage.

YES

Check each

IC700, 701, 702, 703

PIN1,17, 18, 19, 36 +12V

input.

YES

Check PWM modulator input.

Each IC PIN4, 6, 14, 16

YES

Power IC700, 701, 702, 703

PIN20, 27, 29, 34 output.

NO

Refer to SMPS troubleshooting.

Check each LINE registor output voltage.

IC700 : R701, 702, 726, 727

YES

Check output line coil.

YES

OK

NO

3-7

Replace the coils

LGE Internal Use Only

10. AUX FUNCTION CHECK

AUX function check

YES

Check JK800 connection.

YES

Check

IC200(BU4052)_

PIN4, 11 input

waveform.

YES

Check IC200(BU4052)_

PIN3, 13 output waveform.

YES

Check

IC801(MC4580)_PIN 2, 6

input waveform.

YES

NO

IC200(BU4052)_PIN16

Check

VDD, PIN8 VSS

power.

YES

Replace IC200

Check

IC801(MC4580)_PIN4

VSS, PIN8 VDD

power.

YES

Replace IC801OK

NO

Check µ-COM(IC301)_

PIN83, 84 commucation.

Refer to

SMPS troubleshooting.

LGE Internal Use Only

3-8

Only for training and service purposes

11. TUNER FUNCTION CHECK

TUNER function check

YES

Check TUNER

module(TU601) operation.

YES

Check IC200(BU4052)_PIN1, 12 input

waveform.

YES

Check

IC200(BU4052)_PIN3, 13

output waveform and IC601

(BU4052)_PIN2,15 input

waveform.

YES

Check IC801(MC4580)_

PIN2, 6 input waveform.

NO

Check TUNER module voltage(PIN2 : 9V).

Check IC200(BU4052)_

PIN16 VDD, PIN8 VSS power.

YES

Replace IC200.

Check IC801(MC4580)_

PIN4 VSS, PIN8 VDD power.

YES

OK

3-9

YES

Replace IC801.

LGE Internal Use Only

12. TAPE FUNCTION CHECK

TAPE function check

YES

TAPE PCB ASS`Y

YES

IC200(BU4052)_PIN2, 15 input

Check

waveform.

YES

Check IC200(BU4052)_PIN3, 13

output waveform and IC601(BU4052)_

PIN2, 15 input waveform.

YES

Check IC801(MC4580)_ PIN2, 6 input waveform.

YES

NO

Check IC200(BU4052)_

PIN16 VDD, PIN8 VSS power

YES

Replace IC200.

Check IC200(BU4052)_

PIN16 VDD, PIN8 VSS power

YES

Replace IC200.

LGE Internal Use Only

OK

3-10

Only for training and service purposes

13. TAPE PLAY PART CHECK

TAPE PALY part check

YES

IC201(HA12237)_PIN16

Check

12V input.

YES

Check IC201_

PIN5, 26 signal

output.

YES

NO

SMPS troubleshooting.

Refer to

Check A/B

deck head input.

YES

Check A deck head input

IC201_PIN32, 39 and B deck

head input IC201_PIN34, 37.

YES

Check IC201

YES

OK

NO

Replace head wire and tape

deck mechanism.

Replace IC201.

Check IC201_PIN14

mute operation.

YES

NO

Check IC202_PIN10 "HIGH"

YES

Check IC202.

YES

OKOK

3-11

NO

Replace IC202.

LGE Internal Use Only

14. TAPE REC PART CHECK

TAPE REC part check

YES

IC604(PS9829)_PIN49, 52

Check

PWM output.

YES

Check IC201_

PIN7, 24 record input.

YES

Check IC201_

PIN10, 21 output.

YES

Check L203_PIN2, 3

oscillation.

NO

Refer to PWM

modulation troubleshooting.

Check IC100_PIN23

"HIGH"

YES

OK

Check Q205(D1304)_

base "HIGH".

NO

Replace IC201.

Check IC100_PIN23 "HIGH"

YES

Check P2203_PIN5, 3 input

and PIN8 erase input.

YES

OK

LGE Internal Use Only

YES

OK

3-12

Replace IC202.

Only for training and service purposes

INTERNAL BLOCK DIAGRAM OF ICs

1. ES6838

GPIO

SDRAM/ROM

Interface

Audio ADC

Serial Audio

Interface

Audio DAC

USB

DVD

Descrambler

Transport

ATAPI

32-Bit

RISC

Processor

16 K Cache

Gateway

+

DMA

Controller

Huffman Decoder

+

Servo Controller / RF

Video

Processor

Display

OSD / SPU

Controller

Scaler

DeIntelacer

TV-Encoder

VDAC

HDMI I/F

8051

µController

DSC

Digital

PLL

ECC

3-13

ROM

RAM

DRAM

Interface

LGE Internal Use Only

2. HA12237F

LGE Internal Use Only

3-14

Only for training and service purposes

3. PS9829B

/

MBCK

MLRCK

MSDIN[0:3]

SBCK

SLRCK

SSDIN[0:3]

MIC_MCLK

MIC_BCK

MIC_LRCK

MIC_SDIN

SPI/I2C

SO/SDA

SCK/SCL

SI/I2C_AD0

CS/I2C_AD2

EXT_MUTE

Input

&

Output

MUX

Sample

Rate

Converter

Input

Mapper

Mic, Input

Processor

Host

Interface

2

(I

C, SPI)

Internal Controls

Down Mixer

Mixer

Serial Audio

Output

Interface

4 Band

EQ

Internal Clock Internal Reset

Reset & Power Down

PLL

Bass

Manager

Automatic

Gain

Limiter

Main

Volume

Power Supply

Trim

Volume

Serial Audio

Output

Interface

Output Mapper

PWM

Modulator

POP

NR

DMIX_MCLK

OLRCK OBCK

DMIX_SDOUT

PWM1_P/M

PWM2_P/M

PWM3_P/M

PWM4_P/M

PWM5_P/M

PWM6_P/M

PWM7_P/M

PWM8_P/M

PWM_HP_L_P/M

PWM_HP_R_P/M

PWM_SWL_P/M

EPD_ENA

OVERLOAD

4. PT6324

DIN/DOUT

CLK

STB

OSC

LED1

Serial

Data

Interface

CSC

LED

Driver

CLK_IN

Control

Display Memory

Timing Generator

Key Matrix Memory

/RESET

Dimming Circuit

PLL_DVSS

PLL_DVDD

PLL_AVSS

PLL_AVDD

DVSS

DVDD

IO_VSS

IO_VDD

Segment Driver

Grid

Driver

SG1/KS1 SG2/KS2 SG3/KS3 SG4/KS4 SG5/KS5 SG6/KS6 SG7/KS7 SG7/KS7 SG8/KS8 SG9/KS9 SG10/KS10 SG11/KS11 SG12/KS12 SG13/KS13 SG14/KS14 SG15KS15 SG16/KS16 SG17 SG18 SG19 SG20 SG21 SG22 SG23 SG24

GR1 GR2 GR3 GR4 GR5 GR6 GR7 GR8 GR9 GR10 GR11 GR12 GR13 GR14 GR15 GR16

K1 K2 VDD GND VEE

3-15

LGE Internal Use Only

Only for training and service purposes

5. STR-S6757IF1905

4

Vcc

Reg&

Iconst

Burst Control

S

OVP

Start

Stop

Burst

RQ

OSC

Protection latch

R

Q

S

Q

DRIVE Reg

Delay

S

R

OCP

FB

D

S

GND

FB

1

2

3

6

OLP

Soft Start

MaxON

Bottom Selector

BSD

Counter

BD

OCP/BD

7

SS/OLP

5

LGE Internal Use Only

3-16

Only for training and service purposes

6. TAS5142

System

Microcontroller

T

AS5508

ALID

V

OTW

SD

RESET_AB RESET_CD

SD

OTW

BST_A

BST_B

Bootstrap

Capacitors

Left-

Channel

Output

Right-

Channel

Output

System

Power

Supply

32 V

Hardwire

Mode

Control

PVDD

PWM_A

PWM_B

PWM_C

PWM_D

M1

M2

M3

Input HúBridge 1

Input H-Bridge 2

PVDD_A, B, C, D

GND_A, B, C, D

4

4 4

PVDD

Power

Supply

Decoupling

2-Channel

H-Bridge

BTL Mode

GVDD_A, B, C, D

VDD

GND

VREG

GVDD

VDD

VREG

Power Supply

Decoupling

Output

H-Bridge 1

Output

H-Bridge 2

AGND

OC_ADJ

Hardwire OC Limit

OUT_A

OUT_B

OUT_C

OUT_D

BST_C

BST_D

2nd-Order L-C

Output Filter

for Each

Half-Bridge

2nd-Order L-C

Output Filter

for Each

Half-Bridge

Bootstrap

Capacitors

GND

12 V

VAC

GND

GVDD (12 V)/VDD (12 V)

3-17

LGE Internal Use Only

7. U1739EJ2V1UD00/KF2_E

TO00/TI010/P01

TI000/P00

RxD6/P14 (LINSEL)

TO01/TI011/P06

TI001/P05

TOH0/P15

TOH1/P16

TI50/TO50/P17

TI51/TO51/P33

RxD0/P11

TxD0/P10

RxD6/P14 TxD6/P13

SI10/P11

SO10/P12

SCK10/P10

SI11/P03

SO11/P02

SCK11/P04

SCK11/P05

SIA0/P143

SOA0/P144

SCKA0/P142

STB0/P145

BUSY0/P141

EXSCL0/P62

SDA0/P61

SCL0/P60

ANI0/P20 to

ANI7/P27

AV

REF

AV

INTP0/P120

INTP1/P30 to

INTP4/P33

INTP5/P16

INTP6/P140,

INTP7/P141

SS

RxD6/P14 (LINSEL)

16-bit timer/ event counter 00

16-bit timer/ event counter 01

Internal low-speed

8-bit timer event counter 50

8-bit timer event counter 51

Serial interface UART0

Serial interface UART6

Serial interface CSI10

Serial interface CSI11

Serial interface CSIA0

Serial interface IIC0

8

4

2

8-bit timer H0

8-bit timer H1

oscillator

Watchdog timer

Watch timer

LINSEL

A/D converter

Interrupt

control

78K/0

CPU core

Note 1

BANK

Internal

high-speed

RAM

VDD,

EVDD

VSS,

EVSS

Flash

memory

Internal

expansion

RAM

FLMD0

Note 2

7

8

7

4

8

5

6

BUZ/P141

PCL/P140

POC/LVI

control

KR0/P70 to

8

KR7/P77

OCD0A OCD0B

RESET XT1/P121 X2/EXCLK/P122

XT1/P123 XT2/EXCLKS/P124

REGC

Port 0 P00 to P06

Port 1 P10 to P17

Port 2 P20 to P27

Port 3 P30 to P33

Port 4 P40 to P47

Port 5 P50 to P57

Port 6 P60 to P678

Port 7 P70 to P778

Port 12 P120 to P124

Port 13 P130

Port 14 P140 to P145

Buzzer output

Clock output control

Power on clear/

low voltage

indicator

Key return

Reset control

Multiplier &

divider

On-chip debug

System control

Internal high-speed

oscillator

Volt age

regulator

Note 2

/X1, OCD1A

Note 2

/X2, OCD1B

EXLVI/P120

Note 2

/P31

Note 2

/P32

LGE Internal Use Only

3-18

Only for training and service purposes

WIRING DIAGRAM

SMPS PCB

15P

2 CH SPK TERMINAL

3 CHANGER MD

3P

RED

5P

6P

RED

AUX

JACK

MODULE

TUNER

[Total CNT Q'ty : 14ea]

1. SMPS MAIN : 2ea

2. MAIN DVD : 2ea

3. MAIN FRONT : 1ea

4. FRONT DVD : 1ea

5. DVD MD : 5ea

6. DECK MECHA. : 3ea

4P

CD PCB

30P

USB MIC H/P

8P3P 13P

MAIN

PCB

29P

DOUBLE DECK

MECHANISM

FRONT PCB

3-19 3-20

LGE Internal Use Only

BLOCK DIAGRAMS

1. SMPS BLOCK DIAGRAM

RECTIFICATION

SMOOTHING

AMP

Switch

T R A

CIRCUIT

ZNR &

FILTER

AC INPUT

IC #

MAIN

Switch

IC #

1

2

N S

#1

T R A N

AMP (+) 31.5V

FEED BACK

3.5V (278R35)

6.1V (KIA278R05)

P9701

12V (78R12)

5V(P-SEN S)

P9702

LGE Internal Use Only

S

#2

3-21 3-22

-12V

-31. 5V(VKK)

FL1-FL2 (4. 5V)

FEED BACK

Only for training and service purposes

2. MAIN & FRONT BLOCK DIAGRAM

DECK B

DECK A

DECK S/W

TUNER MODULE

AUX

L/R, REC_L/R

ERASE

L/R

TUNER_L / R

AUX_L / R

[5]

BU4052

AUDIO

S/W

HA12237F

Cassette

Deck

P

AS

DECK_L / R

AUDIO L / R

REC_MUTE, PB_MUTE, TAPE_A/B

[4]

SOL_A/B, MOTOR, REC_BIAS

[4]

HALL_A/B, LEAF_A/B

[4]

RDS_CLK / DATA, PLL_DO / CLK / CE[5]

PLL_DI, T_MUT

AK5358

2CH.

ADC

E[2]

4052_A / B

MCLK, LRCK, BCK, SD_OUT [7

TR DRIVER

KS24C021

EEPROM

VFD_STB / DI / DO / CL

ADC_RS

T

EEPROM

CLK/DATA

[4]

K

]

9.8304MHz

78F0546

AUDIO

MICOM

TX

RX

9830_RST CLK/DAT

[3]

A

PS9830

Modulato

REC_L / R

H/P_L / R

CLK,DATA

FSEQ,WRQ,CD_DO,RX [4]

EIGHT KINDS EXCEPT CD IN

74HCT244

BUFFER

12.288MHz

PWM

5142_RST

5142_S

D

FL +/-

FR +/-

SW +/

r

LRCK,BCK,DATA0

TAS5152

FL

or

TAS5142

-

Digital Power

P

AM

[3]

FR

SW

AUX2

AUX2 _L/R

H/P

MIC

MIC _SIG

BA3308 OPAMP

(ALC)

USB

FSEQ,WRQ,CD_DO

PT6324

MIC _SIG

FLT

DRIVER

CLK,DATA,+5V,GND

CY8C21484

TOUCHPAD

DRIVER IC

[4]

TX, RX

16.9344MHz

14.3178MHz

LC78692W

DSP IC

FDO,TDO

SLDO,SPDO

[4]

A,B,C,D,E,F

AM5810 MOTOR DRIVER

FA+/-

TA+/-,

SL+/-, SP+/-

OP

/CL

[4]

PICK UP

MOTOR

TOUC

FLT

DISPLAY

H PAD

D+ / D-,+5V/G

ND

OTI6888

[4]

3-23 3-24

VER.A

MD

STDATA, STCK, STREQ[3]

MD

9

LGE Internal Use Only

SCHEMATIC DIAGRAMS

1. SMPS SCHEMATIC DIAGRAM

IMPORTANT SAFETY NOTE :

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.

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.

LGE Internal Use Only

3-25 3-26

Only for training and service purposes

2. MAIN SCHEMATIC DIAGRAM

3-27 3-28

LGE Internal Use Only

3. AMP SCHEMATIC DIAGRAM

LGE Internal Use Only

3-29 3-30

Only for training and service purposes

4. DECK SCHEMATIC DIAGRAM

3-31 3-32

LGE Internal Use Only

5. FRONT SCHEMATIC DIAGRAM

LGE Internal Use Only

3-33 3-34

Only for training and service purposes

6. KEY-L SCHEMATIC DIAGRAM 7. KEY-R SCHEMATIC DIAGRAM

3-35 3-36

LGE Internal Use Only

PRINTED CIRCUIT BOARD DIAGRAMS

1. MAIN P.C.BOARD

(TOP VIEW)

LGE Internal Use Only

3-37 3-38

Only for training and service purposes

MAIN P.C.BOARD

(BOTTOM VIEW)

3-39 3-40

LGE Internal Use Only

2. FRONT P.C.BOARD

LGE Internal Use Only

3-41 3-42

Only for training and service purposes

3. SMPS P.C.BOARD 4. KEY-L P.C.BOARD

5. KEY-R P.C.BOARD

3-43 3-44

LGE Internal Use Only

MEMO MEMO

LGE Internal Use Only

3-45 3-46

Only for training and service purposes

SECTION 4 CD PART ELECTRICAL

CD ELECTRICAL TROUBLESHOOTING GUIDE

1. CD PART TROUBLESHOOTING

Turn on CD

YES

OPEN CLOSE check

YES

“Reading”

Display check

YES

Reading OK check

NO

Connector check (PN803, PN804)

NO

Check voltage CN806 PIN1 : 12, PIN2 : 6.3V

NO

Check voltage PN805

PIN22 : CLOSE, PIN23 : OPEN

Connector check

(PN802, PN803, PN804, CN806, PN814)

NO

Check micom interface circuit (PN805)

(CE, BTL-MUTE, CD-IN, CD-OUT, CLK, WRQ, FSEQ)

Connector check (PN801,PN802)

NO

Check pick up movement

YES

If PALY, AUDIO

OUTPUT check

YES

OK

NO

Check AM5810FP (IC802)

NO

Check LC78692 (IC801)

Check PN805 audio data PIN10 : DA_LRCK (IC801 PIN60 LRSY) PIN11 : DA_BCK (IC801 PIN59 DATACLK) PIN12 : DA_DATA0 (IC801 PIN58 DATA)

4-1

LGE Internal Use Only

1-1. OPEN CLOSE NG

Connector locking check (PN803, PN804, PN814)

YES

supply circuit (PN805, CN806)

Check power

CN806 PIN1 : 12V, PIN2 : 6.3V

PN805 PIN8 : +5V_AD

YES

Check voltage

change of OPEN CLOSE

IC803 INPUT voltage PIN6 : 12V,

PIN7:6.3V (PN805 PIN2 :

BTL_MUTE, 23 : OPEN,

22 : CLOSE)

YES

Check voltage change LO+, LO- OF IC803

(PN805 PIN23 : OPEN, PIN22 : CLOSE)

YES

NO

Defective main power supply

Defective micom

Defective IC803

LGE Internal Use Only

Defective mechanism

4-2

Only for training and service purposes

1-2. “READING” DISPLAY CHECK (= ONLY “CD” DISPLAY)

(PN802, PN803, PN804, PN805, CN806)

Conector locking check

YES

Check power

supply port (PN805, CN806)

CN806 PIN1 : 12V, PIN2 : 6.3V,

PIN4 : 5V PN805

PIN8 = 5V_AD

YES

Check voltage The PIN2 of IC804 IC804 PIN2 : 3.3V

YES

Check reset

signal of PN805

PN805 PIN19 : 5V

YES

NO

Defective connector or main power supply

Defective IC804

Defective micom or connector

Check micom interface circuit (PN805) PN805 PIN1, 3, 4, 15, 19, 26 signal check (1 : CE, 3 : DI, 4 : CLK, 15 : D0, 19 : RST,

18 : FSEQ, 26 : WRQ) PIN3 DI : From DSP

to micom PIN15 DO : From micom to DSP

Check the waveform #1

YES

NO

Defective micom or connector

Defective IC804

4-3

LGE Internal Use Only

1-3. READING OK CHECK (= “NO DISC” DISPLAY)

Connector locking check

(PN801, PN802)

A

Does sled move?

YES

Does lense move?

(= UP & DOWN)

YES

Does laser light?

YES

Does spindle rotate?

YES

NO

Check PN802

PIN3, 4 (SL+, SL-)

B

Check PN801

PIN13, 16 (FA+, FA-)

C

Check PN801 PIN10 (LD)

D

Check PN802

PIN3, 6 (SP+, SP-)

E

NO

Defective pick up or

IC802 or IC801

Defective pick up or

IC802 or IC801

Defective pick up or IC802

Defective pick up or

IC802 or IC801

Is reading OK?

LGE Internal Use Only

NO

Check PN801

PIN14, 15 (TA+, TA-)

4-4

NO

Defective pick up or

IC802 or IC801

Only for training and service purposes

1-4. READING OK CHECK #A (= “NO DISC” DISPLAY)

A

Does

SL+ waveform

appear at (IC802 PIN13

and PN802 PIN3)

waveform #2

sled motor

wave

YES

Check PN802 connector line

YES

NO

Defective PN802 connector

Defective pick up sled motor

Does slin

waveform appear at

(IC802 PIN5)

waveform #2

sled drive

wave

YES

Defective IC802

1-5. READING OK CHECK #B (= “NO DISC” DISPLAY)

NO

Defective IC801

B

Does

FA+ waveform

appear at (IC802 PIN16

and PN801 PIN13) waveform #3 focus

coil drive

wave

YES

Check PN801 connector line

YES

NO

Does

fain-waveform

appear at (IC802 PIN25)

waveform #3

focus drive

wave

YES

Defective IC802

Defective PN801 connector

Defective pick up

focus actuator

NO

Defective IC801

4-5

LGE Internal Use Only

1-6. READING OK CHECK #C (= “NO DISC” DISPLAY)

C

Is ?V applied

to PIN10 of PN801

laser supply voltage

check

YES

Check PN801 connector line

NO

Is 3.3V

applied to PIN30, 36, 39, 41, 61, 68, 75 of IC801 RF IC

supply voltage

check

YES

Is 2.3V

PIN18 (LDO) of IC801

laser control voltage

check

YES

Defective Q801 or D801

Defective PN801 connector

NO

Defective IC804

Defective IC801

LGE Internal Use Only

YES

Defective pick up laser part

4-6

Only for training and service purposes

1-7. READING OK CHECK #D (= “NO DISC” DISPLAY)

D

Does

SP+ waveform

appear at (IC802

PIN11 and PN802 PIN5)

waveform #4 spindle

motor drive

wave

YES

Check PN802 connector line

YES

NO

Does

spin waveform

appear at (IC802 PIN6)

waveform #4 spindle drive

wave

YES

Defective IC802

Defective PN802 connector

Defective pick up

spindle motor

NO

Defective IC801

4-7

LGE Internal Use Only

1-8. READING OK CHECK #E (= “NO DISC” DISPLAY)

E

Does

TA+ waveform

appear at (IC802 PIN17

and PN801 PIN14)

waveform #5 tracking

coil drive

wave

YES

Check PN802

connector line

YES

Does

ARF signal appear?

(IC801 PIN 2)

waveform #6

NO

Does

tain - waveform

appear at (IC802 PIN22)

waveform #5

tracking drive

wave

YES

Defective IC802

Defective PN802 connector

Defective pick up or IC801

NO

Defective IC801

YES

Does FE, TE signal

appear? (IC801

PIN10 : RFMON, PIN16 : TE)

waveform #6

* REMON is FE

NO

Defective pick up or IC801

LGE Internal Use Only

4-8

Only for training and service purposes

2. USB PART TROUBLESHOOTING

Turn on USB

YES

“Checking” or

“USB” display check

YES

Reading OK check

YES

If PLAY, AUDIO

OUTPUT check

YES

NO

Connector check

(PN805, CN806, PN810 )

NO

Check power supply circuit (CN806)

NO

Check micom interface circuit (PN805)

PIN13 : RX (IC805 PIN49 : TXD) PIN14 : TX (IC805 PIN33 : RXD)

Check PN810 1PIN : 5V

NO

Check PN810 PIN2(D-), 3(D+)

NO

Check OTI6888 (IC805)

Check signal STCK, STREQ, STDATA

STCK : IC805 PIN52, IC801 PIN55

STREQ : IC805 PIN53, IC801 PIN54

STDATA : IC805 PIN54, IC801 PIN56

NO

4-9

Connector check (CN806)OK

LGE Internal Use Only

WAVEFORMS OF MAJOR CHECK POINT

#1.MICOM INTERFACE WAVEFORM

(PN805 PIN26, 19, 3, 15) during power on

PIN26 : WRQ

PIN19 : RESET

PIN3 : DI (IC801 PIN46 DATA OUT)

PIN15 : DO (IC801 PIN45 DATA IN)

#1.MICOM INTERFACE WAVEFORM

(PN805 PIN4, 1, 18) during power on

#1.MICOM INTERFACE WAVEFORM

(PN805 PIN26, 19, 3, 15) during normal play

PIN26 : WRQ

PIN19 : RESET

PIN3 : DI (IC801 PIN46 DATA OUT)

PIN15 : DO (IC801 PIN45 DATA IN)

#1.MICOM INTERFACE WAVEFORM

(PN805 PIN4, 1, 18) during normal play

PIN4 : CL

PIN18 : FSEQ

PIN1 : CE

PIN4 : CL

PIN1 : CE

PIN18 : FSEQ

LGE Internal Use Only

4-10

Only for training and service purposes

#2.SLED DRIVE AND MOTOR WAVEFORM

(IC802 PIN5, 13) when focus search

#2.SLED DRIVE AND MOTOR WAVEFORM

(IC802 PIN5, 13) during normal play

PIN5 : SLIN

PIN13 : SL+

#3.FOCUS DRIVE AND MOTOR WAVEFORM

(IC802 PIN25, IC802 PIN16)

• When focus search failed or there is no disc on tray

PIN5 : SLIN

PIN13 : SL+

#3.FOCUS DRIVE AND MOTOR WAVEFORM

(IC802 PIN25, IC802 PIN16)

• There is disc on tray and focus search success

PIN25 : FAO

PIN16 : FA+

4-11

PIN25 : FAO

PIN16 : FA+

LGE Internal Use Only

#4.SPINDLE DRIVE AND MOTOR WAVEFORM

(IC802 PIN6, 11) when TOC reading

#5.TRACK DRIVE AND MOTOR WAVEFORM

(IC802 PIN22, IC802 PIN17) during normal play

PIN11 : SP+

PIN6 : SPIN

#6.RF, FOCUS AND TRACKING ERROR WAVEFORM

(IC801 PIN2, 10, 16) during normal play

PIN2 : RFOUT

PIN22 : TAO

PIN17 : TA+

PIN 16 : TE

LGE Internal Use Only

PIN10 : RFMON(FE)

4-12

Only for training and service purposes

SCHEMATIC DIAGRAMS

1. CD SCHEMATIC DIAGRAM

4-13 4-14

LGE Internal Use Only

2. USB SCHEMATIC DIAGRAM

LGE Internal Use Only

4-15 4-16

Only for training and service purposes

PRINTED CIRCUIT BOARD DIAGRAM

CD P.C.BOARD

(TOP VIEW) (BOTTOM VIEW)

4-17 4-18

LGE Internal Use Only

MEMO MEMO

LGE Internal Use Only

4-19 4-20

Only for training and service purposes

LG MCD112 A0U Diagram

Specifications and Main Features

Frequently Asked Questions

User Manual