LG MDT355, MDS355V, MDS355W Service manual

MODEL: MDT355(MDS355V/MDS355W)SERVICE MANUAL

Internal Use Only

Website http://biz.lgservice.com

DVD Mini Hi-Fi System

SERVICE MANUAL

P/NO : AFN75496339 JUNE, 2011

MODEL: MDT355(MDS355V/MDS355W)

CAUTION

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

CONTENTS

SECTION 1 ........ SUMMARY

SECTION 2 ........ CABINET & MAIN CHASSIS

SECTION 3 ........ ELECTRICAL

SECTION 4 ........ REPLACEMENT PARTS LIST

1-1

SECTION 1

SUMMARY

CONTENTS

SERVICING PRECAUTIONS ................................................................................................................... 1-3

ESD PRECAUTIONS .................................................................................................................................. 1-5

SERVICE INFORMATION FOR EEPROM .......................................................................................... 1-6

SOFTWARE UPGRADE PROCESS ..................................................................................................... 1-7

SPECIFICATIONS ....................................................................................................................................... 1-8

1-2

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

Storage in conductive bag

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

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

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 lens.

6) Never attempt to disassemble the pick-up.
Spring has excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab.

Drop impact

Pressure

Magnet

How to hold the pick-up

Cotton swab

Conductive Sheet

(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.

1-3

Pressure

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 or 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 (1 MΩ)

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.

Armband

Resistor
(1 MΩ)

Resistor
(1 MΩ)

Conductive
Sheet

1-4

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 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.

1-5

SERVICE INFORMATION FOR EEPROM

POWER ON

FLD no disc status

Remote control ‘2’ + Front ‘STOP’

push same timing during 5s

FLD ‘OP-0….

Move to appropriate position

and make changes

with Rmc ‘skip, mode, play’ key.

Press STOP key

FLD ‘write ok’

DETECT NEW EEPROM
(OPTION EDIT SCREEN)

NAME

OPT 0
OPT 1
OPT 2
OPT 3
OPT 4
OPT 5
OPT 6
OPT 7
OPT 8
OPT 9

HEX

F5
00
A4

DD

00
09
81
20
50
00

Remote control ‘Fwd skip’ +

Front ‘STOP’ push same timing

FLD ‘E2P CLR’

Completed

1-6

SOFTWARE UPGRADE PROCESS

Important Notice :
When ugrade the software running. Do not shunt down the power, it tmay damage the unit.

1. MICOM UPGRADE

1) Copy the software file into USB flash, as the file name is LG_MDT355__XXXXXXX.HE

2) Insert the USB flash into USB host.

3) Set Function to USB position.

Appear onto VFD
UPGRADE

4) After finish, Set will automatically power off.

2. FLASH MEMORY UPGRADE

1) Copy the software file into USB flash, As the file name is LG_MDT355__XXXXXXX.RO

2) Insert the USB flash into USB host.

3) Set Function to USB position.

Appear onto VFD
CODE 00

NO USB

4) Manual Power off and Power on is finish.

1-7

SPECIFICATIONS

• GENERAL

Power supply Refer to main label.
Power consumption Refer to main label.
Net Weight 5.27 kg
External dimensions (W x H x D) ( 272 x 334 x 381 ) mm
Operating conditions Temperature 5 °C to 35 °C, Operation status: Horizontal
Operating humidity 5 % to 85 %
Laser Semiconductor laser, wavelength, 760 to 800 nm

• TUNER FM/AM [MW]

FM Tuning Range 87.5 to 108.0 MHz or 87.50 to 108.00 MHz
FM Intermediate Frequency 128 kHz
AM Tuning Range 522 to 1 620 kHz, 520 to 1 710 kHz or 522 to 1 710 kHz
AM Intermediate Frequency 45 kHz

• AMPLIFIER

Output Power Front : 100 W x 2
SUB Woofer : 150 W

• USB

Bus Power Supply (USB) DC 5 V 500 mA
USB Version USB 2.0 or USB 1.1

• CD

Frequency Response 40 to 20 000 Hz
Signal-to-noise ratio More than 60 dB
Dynamic range More than 50 dB

• TAPE

F.F/REW Time 120 sec (C-60)
Frequency Response 250 to 8 000 Hz
Signal to Noise Ratio 40 dB
Channel Separation 45 dB (P/B) / 40 dB (R/P)
Erase Ratio 50 dB (MTT-5511)

• SPEAKERS

FRONT SUBWOOFER

Speaker name MDS355V MDS355W

Type 2 Way 2 Speaker 1 Way 1 Speaker

Impedance 4 Ω 3 Ω

Rated Input Power 100 W 150 W

Max. Input Power 200 W 300 W

Net Dimensions (W x H x D) ( 222 x 342 x 276 ) mm ( 272 x 334 x 332 ) mm

Net Weight 4.75 kg 5.3 kg

1-8

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

EXPLODED VIEWS ..................................................................................................................................... 2-3

1. CABINET AND MAIN FRAME SECTION (MDT355) ................................................................................ 2-3

2. TAPE DECK MECHANISM SECTION ...................................................................................................... 2-5

3. SPEAKER SECTION ................................................................................................................................ 2-7

4. PACKING ACCESSORY SECTION ......................................................................................................... 2-9

2-1

MEMO

2-2

EXPLODED VIEWS

1. CABINET AND MAIN FRAME SECTION (MDT355)

263L

255

460

A41A

256

283

257

259

258

282

KEY3

451

452

266L

H

267L

250

264L

265

261

262

267R

451

A49

MIC

263R

264R

459

266R

KEY2

B

454

J

CABLE3

268

454

281

C

A26

A01

D

272

455

I

R

A

B

C

455

455

MAIN

D

E

F

O

H

G

456

J

K

A46

455

456

251

252

254

253

A00

453

452

G

452

A48

LED

A41L

Q

454

L

L

A43

Q

VFD

M

KEY1

A41R

271

I

K

458

CABLE2

CABLE1

M

F

USB

N

274

453

453

A

A45

O

SMPS

A47

456

R

457

273

300

E

270

N

269

2-3 2-4

2. TAPE DECK MECHANISM SECTION

A00

009

003

001

007

037

015

006

017

020

019

022

018

A01

023

025

011

A02

009

2-5 2-6

3. SPEAKER SECTION

3-1. LEFT/RIGHT SPEAKER (MDS355V)

A60

2-7

3-2. SUBWOOFER (MDS355W)

A90

2-8

4. PACKING ACCESSORY SECTION

824 AM antenna

Remote controller900

Packing803T

825 FM antenna

Battery808

Instruction Ass'y801

Bag804

803B

Packing

Box802

2-9

MEMO

2-10

SECTION 3

ELECTRICAL

CONTENTS

ONE POINT REPAIR INSTRUCTION ................................................................................................... 3-2

1. NO POWER PROBLEM ......................................................................................................................... 3-2

2. VFD DOESN'T DISPLAY ........................................................................................................................ 3-4

3. THE DISC TRAY DOESN'T WORK ....................................................................................................... 3-5

4. NO BOOTING WHEN YOU TURN THE UNIT ON ................................................................................ 3-9

5. SPEAKER NO OUTPUT WHEN YOU TURN THE UNIT ON .............................................................. 3-13

6. VFD HAVEN'T SHOW WHEN YOU TURN THE UNIT ON .................................................................. 3-15

MAJOR WAVEFORMS ............................................................................................................................ 3-16

1. IC1 MICOM INTERFACE WAVEFORM ............................................................................................... 3-16

2. IC100 MICOM INTERFACE WAVEFORM ........................................................................................... 3-17

3. SLED DRIVE AND MOTOR WAVEFORM ........................................................................................... 3-18

4. SPINDLE DRIVE AND MOTOR WAVEFORM ..................................................................................... 3-19

5. RF, FOCUS AND TRACKING ERROR WAVEFORM .......................................................................... 3-20

WIRING DIAGRAM ................................................................................................................................... 3-21

BLOCK DIAGRAM .................................................................................................................................... 3-23

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

1. SMPS - POWER CIRCUIT DIAGRAM ................................................................................................. 3-25

2. MAIN - DVD MPEG CIRCUIT DIAGRAM ............................................................................................. 3-27

3. MAIN - MCU CIRCUIT DIAGRAM ........................................................................................................ 3-29

4. MAIN - SERVO CIRCUIT DIAGRAM ................................................................................................... 3-31

5. MAIN - D/AC CIRCUIT DIAGRAM ....................................................................................................... 3-33

6. MAIN - AMP CIRCUIT DIAGRAM ........................................................................................................ 3-35

7. AUDIO DECK SYSTEM CIRCUIT DIAGRAM ...................................................................................... 3-37

8. MIC / USB / KEY / VFD CIRCUIT DIAGRAM ...................................................................................... 3-39

CIRCUIT VOLTAGE CHART ................................................................................................................. 3-41

PRINTED CIRCUIT BOARD DIAGRAMS ......................................................................................... 3-45

1. MAIN P.C.BOARD ................................................................................................................................ 3-45

2. SMPS P.C.BOARD ............................................................................................................................... 3-49

3. FRONT P.C.BOARD ............................................................................................................................. 3-51

3-1

2

W

7

V

F

C

-

ONE POINT REPAIR INSTRUCTION

1. NO POWER PROBLEM

No power problem occurs when you power on the unit.

1-1. F1, D2 and D6
1-1-1. Solution

Replace F1, D2, D6 on SMPS board.

1-1-2. How to troubleshoot (Countermeasure)

1) Look at the physical of fuse F1(Ft5a_250 V).

2) Check the bridge diode of D2(DF06M), D6(GBU6J).

D2

DF06M

2

2

3

3

SQE2930

RT1

NTC 4D-15

t

C19 104/275V

C23 102/400V

SQE2930

C25 104/275V

RV1 471

1

1

- +

4

4

1

D6
GBU6J

1

-+

4

4

12
56

7

8

34

LF1

C24 102/400V

12
5

6

8

7
34

LF2

1 2

W17 Jumper

C1

68uF/450V

3

3

C3

103/630V

330uF/

450V

C9

2

2

5

2

4

1

D19
RL104F

22uF/50V

U3

Vstr

Vcc

Ipk

GND

FSFM260

C21

DRAIN

DRAIN

DRAIN

Vfb

C14

47uF/50V

8

7

6

3

D11

RL104F

C20

272

R

56k/2

1-1-3. Service hint (Any picture / Remark)

D5
UF40

R4

10

R10

10

Check with ohm meter is short!

W10 Jumper

1 2

LTV

P

C26
472

R17
47k

R20 1.5M/0.5W

F1

250V/5A

2

R21
47k

Q7
KTA1268

1

10

R24

W12 Jumper

C33

U

3

4

1

2

Check with ohm meter is open!

3-2

e

1 2

ONE POINT REPAIR INSTRUCTION

No power problem occurs when you power on the unit.

1-2. C29, C30 and C31
1-2-1. Solution

Replace C29, C30, C31 on SMPS board.

1-2-2. How to troubleshoot (Countermeasure)

1) Check all of voltage.

PC1
LTV-817

1

5

33

C32

561/1kV

C36

102

R16

2.7k

W11 Jumper

1 2

W16 Jumper

1

2

R31

1.5k

D22

RL104F

T2

7

6

8
9

5
4

13
14
15

3

16

2

17
18
10
11

1

12

EER4242/3335

PC3

LTV-817

R15 56

C15 470pF/1kV

1

1

2

3

3

D21

20A/200V

4

4

3

3

C37 102/400V

1

2

2

1

2

C29

2200uF

R32 470

/50V

C30

2200uF

HS2

15*10

/50V

1

2200uF

C31

R34
1k

/50V

R14

R25
33k

560

W15 Jumper

R27
33k

R28
33k

R26
33k

R18 18k

1 2

C27 2.2uF/50V

U5

KA431/TO

Danger if fuse is incorrectly replaced.

Replace only with the type identical to fuse rating

and(or) model name described in main label.

R22

1.2k

R29
82

CAUTION:

C28 2.2uF/50V

U6

KA431/TO

R19

2.7k

R23
2k

R30
150

Warn
Parts
resp

1-2-3. Service hint (Any picture / Remark)

3-3

&&&

ONE POINT REPAIR INSTRUCTION

2. VFD DOESN'T DISPLAY

Timer doesn't work(abnormal display).

2-1. D10
2-1-1. Solution

Replace D10 on SMPS board.

2-1-2. How to troubleshoot (Countermeasure)

1) Check J1 pin3 Ö -26 V at power.

2

uF/50V

C7
1000uF/25V

1 2

W13
Jumper

1 2

W14
Jumper

100uF/25V

Q5

KTC3205

U2 78R12

3

1

U4 278R33

IN1OUT

GND3CON

C13

L1 2 2uH

GND

IN

R8 1k

C22
330uF/16V

1000uF/16V

CON

OUT

2

4

R12
36k

C5

4

2

R7 4.7k

C11

100uF/6.3V

1k

Q6

KTA1273

R6

R3
18k

3

U1 78R05

IN1OUT

CON

GND

C8

100uF/16V

KTA1268

W18Jumper

Q4

2

4

C6

100uF/6.3V

1 2

KTC3205

R9
1k

R1 4.7 k

R14

Q2

R11

4.7k

560

R5 4.7 k

W8 Jumper

1 2

C18
47uF/10V

W1 Jumper

1

2

D9
3V

W2 Jumper

1 2

D10
3V

W3 Jumper

2

1

D25

1N4148

W7 Jumpe r

1 2

D26
1N4148

W6

12

Jumper

W4

12

Jumper

12

W5
Jumper

12

12

8P

8
7
6
5
4
3
2
1

J1

W19
Jumper

W9
Jumper

8.GND

7.CD_CTRL

6.PWR_CTRL

5.PWR_SENS

4.5.6V

3.VKK

2.FL-

1.FL+

1.GND

J2

2.GND

3.GND

1

4.-12V

2
3

5.+12V

4

6.+12V

5

7.5V

6

8.5.9V

7

9.3.3V

8
9

10.3.3V

10

11.GND

11

12.GND

12

13.36V

13

14.36V

14

15.36V

15

15P

2-1-3. Service hint (Any picture / Remark)

3-4

ONE POINT REPAIR INSTRUCTION

3. THE DISC TRAY DOESN'T WORK

When you turn on the set, the disc tray won't work.

3-1. U1

3-1-1. Solution

Replace U1_KA78R05 on SMPS board.

3-1-2. How to troubleshoot (Countermeasure)

1) Check all of voltage.

2) 5 V unnormal.

W1 Jumper

1

22uH

1000uF/16V

12

CON

OUT

3

2

4

R12
36k

1k

C5

4

2

R7 4.7 k

C11

100uF/6.3V

1k

Q6

KTA1273

2

U1 78R05

1

IN

OUT

3

R6

R3
18k

GND

100uF/16V

CON

C8

W18Jumper

Q4

KTA1268

2

4

C6

100uF/6.3V

1 2

KTC3205

R9
1k

R1 4.7 k

Q2

R11

4.7k

R5 4.7 k

W8 Jumper

1 2

C18
47uF/10V

D9
3V

W2 Jumper

1 2

D10
3V

W3 Jumper

2

1

D25

1N4148

D26
1N4148

W6

12

Jumper

W4

12

Jumper

12

W5
Jumper

12

12

8P

8
7
6
5
4
3
2
1

J1

W19
Jumper

W9
Jumper

8.GND

7.CD_CTRL

6.PWR_CTRL

5.PWR_SENS

4.5.6V

3.VKK

2.FL-

1.FL+

1.GND

J2

2.GND

3.GND

1

4.-12V

2
3

5.+12V

4

6.+12V

5

7.5V

6

8.5.9V

7

9.3.3V

8

3-1-3. Service hint (Any picture / Remark)

3-5

0

R
1

m
2

ONE POINT REPAIR INSTRUCTION

When you turn on the set, the disc tray won't work.

3-2. U4 and D8

3-2-1. Solution

Replace U4_278R33 and D8 on SMPS board.

3-2-2. How to troubleshoot (Countermeasure)

1) Check all of voltage.

2) 3.3 V abnormal.

5

2

4

1

D19
RL104F

U3

Vstr

Vcc

Ipk

GND

FSFM260

DRAIN

DRAIN

DRAIN

Vfb

C14

47uF/50V

C3

103/630V

8

7

6

3

D11

RL104F

C20

R2

56k/2W

D5
UF4007

R4

10

R10

10

1

1

3

3

2

2

4

4

5

5

10

9

8

7

12

13

11

15

10

D3 SB360

1000uF/16V

9

D7 UG 2D

8

D8 SB360

7

12

13

D14 RL104F

11

D17 RL104F

15

1000uF/16V

100uF/50V

3-2-3. Service hint (Any picture / Remark)

C4

C10

C12

C7
1000uF/25V

1 2

W13
Jumper

KTC3205

1 2

3

1

1

IN

GND3CON

C13

100uF/25V

Q5

U2 78R12

CON

GND

IN

U4 278R33

OUT

R8 1k

1000uF/16V

OUT

2

4

R12
36k

C5

4

2

R7 4. 7k

C11

100uF/6.3V

1k

Q6

KTA1273

1

IN

3

GND

100uF/16V

R6

R3
18k

OUT

CON

C8

W18 Ju

Q4

KTA1268

2

4

10

1

3-6

_

D

R

V

L

E

L

P

P

ONE POINT REPAIR INSTRUCTION

When you turn on the set, the disc tray won't work.

3-3. IC401

3-3-1. Solution

Replace IC401_IP9011 on main board.

3-3-2. How to troubleshoot (Countermeasure)

1) Check 5 VM voltage.

2) Check IC401 pin15,16,17,18 1.5 V?

3) All of normal, please check R404,R444,R424,R410, also replace IC401.

5VM

R4A1

27K

C413

GND

C428

104P

R4A2

9K1

220uF

C409

10V

104P

3

1DO1-

2DO1+

3DO2-

4DO2+

5VCC1

6IN2

7IN1

2PGND

8MUTE

9CTL3

10 REV3

11 FWD3

12 SVCC

13 DO3+

41DO4-

C408

220uF

10V

_MUTE

SE

N

D+

D-

R432

C438

100P

56K

R447

R422

1K

1K

R408

3K3

C188

C421

103P

C439

100P

L408

FB2500

C419

473P

R444

9K1

C414

R404

C425

20K

104P

103P

R452

DNGDNG

100R

GND

NC

GND

3-3-3. Service hint (Any picture / Remark)

R4A3

33K

V2.3V45.

R4A0

9K1

C402

C451

104P

R424

R410

R499

1K8

8K2

5K1

GND

C404

100uF

10V

C423

474P

28DO6-

DO6+

27

FWD5

26

REV5

25

CTL5

24

BIAS

DO5-

DO4+

23

22GND

03DNGP9

21IN4

IN5

20

19VCC2

18DO5+

17

16

1

5

R409

1K8

IC401

IP9011

3OD

-

C440

104P

C420

474P

R445

10K

XX

R402

1K2

R448

1K2

C435

104P

R417

33R

SPNN

TURD

TUR

GND

SPIND

TU

TU

S

SL

S

S

SP

S

IC401(IP9011)

3-7

R404, R444

R424, R410

ONE POINT REPAIR INSTRUCTION

When you turn on the set, the disc tray won't work.

3-4. IC1

3-4-1. Solution

Replace IC1 ESS8390 on main board.

3-4-2. How to troubleshoot (Countermeasure)

1) Check 5 V CD voltage.

2) Check 3.3 V.

3) Check X501, X100.

4) Check IC100 to IC1 communication resistor R84, R109, R110, R581.

5) Check IC1 to IC502 communication resistor R83, R541, R542.

6) Check ESS8390 SERVO voltage 1.5 V up to snuff instead IC501.

3-4-3. Service hint (Any picture / Remark)

,&

,&

;

,&

;

,&

3-8

ONE POINT REPAIR INSTRUCTION

4. NO BOOTING WHEN YOU TURN THE UNIT ON

When you turn on the set, it will show 'welcome' message continuously on the front

panel. And it will not boot-up normally.

4-1. IC503(W25Q16A), IC3(SN74LV00A)

4-1-1. Solution

Replace IC503,IC3 on main board.

4-1-2. How to troubleshoot (Countermeasure)

1) If 3.3 V haven't on main board of P1, please check P-SENS 5V come out or not?
Please check D1 or replace D1 on SMPS.

2) Check or replace L509.

4-1-3. Service hint (Any picture / Remark)

,&

,&

/

3-9

ONE POINT REPAIR INSTRUCTION

When you turn on the set, it will show 'welcome' message continuously on the front

panel. And it will not boot-up normally.

4-2. IC100 (LC87F5NC8A)

4-2-1. Solution

Replace IC100 on main board.

4-2-2. How to troubleshoot (Countermeasure)

1) If 3.3 V haven't on main board of P1, please check P-SENS 5V come out or not?
Please check D1 or replace D1 on SMPS.

2) If 5V normal, first check R100, R101, R102; OK!
Check the IC101 out and check the zener diode ZD101 voltage if between 4.18 ~ 4.3 V(main pcb).

3) After changging it, the SET is still not booting, please check 5.6 VA at P7904 come out?
Please check or replace diode D3 or L1 on the SMPS board;

Other check the main MCU reset IC U101_KIA7027 of replace it, check or replace D101,D102(main PCB bottom )

4) All of changed the SET still boot-up, please check or replace IC100_LC87F5NC8A(main pcb).

4-2-3. Service hint (Any picture / Remark)

'

3

'

='

,&

,&

3-10

ONE POINT REPAIR INSTRUCTION

When you turn on the set, it will show 'welcome' message continuously on the front

panel. And it will not boot-up normally.

4-3. X100

4-3-1. Solution

Replace X100_9.8304 MHz on main board.

4-3-2. How to troubleshoot (Countermeasure)

1) If 5.6 V normal? Please check D101, D102.

2) Check X100 pin1, 2 voltage is 2.46 V or not replace it.

4-3-3. Service hint (Any picture / Remark)

'

'

;

3-11

ONE POINT REPAIR INSTRUCTION

When you turn on the set, it will show 'welcome' message continuously on the front

panel. And it will not boot-up normally.

4-4. X101

4-4-1. Solution

Replace X101_32.768 kHz on main board.

4-4-2. How to troubleshoot (Countermeasure)

1) If 5.6 V normal? Please check D102, D102.

2) Check X101 pin1, 2 voltage is 2.26 V or not then replace it.

4-4-3. Service hint (Any picture / Remark)

;

'

'

3-12

ONE POINT REPAIR INSTRUCTION

5. SPEAKER NO OUTPUT WHEN YOU TURN THE UNIT ON

When you turn on the SET, it will show 'welcome' message continuously on the

front panel. And speaker have noise output.

5-1. IC604

5-1-1. Solution

Replace IC604_PS9831 on main board.

5-1-2. How to troubleshoot (Countermeasure)

1) Check 3.3 V.

2) Check X601 crytal operation.

3) Check IC604 to IC700 communication resistor R798, R703, R704, R709, R719, R708.

4) Check PWM waveform at R799, R731, R732, R736, R737, R746.

5) If check all of OK, please replace IC604.

5-1-3. Service hint (Any picture / Remark)

,&

;

3-13

ONE POINT REPAIR INSTRUCTION

When you turn on the SET, it will show 'welcome' message continuously on the

front panel. And speaker have noise output.

5-2. IC700, IC701

5-2-1. Solution

Replace IC700, IC701 on main board.

5-2-2. How to troubleshoot (Countermeasure)

1) Check +12 V, +36 V.

2) Check IC700 / IC701 +12 V power supply resistor R701, R702, R724, R727, R726, R729, R730, R787, R753.

3) Check signal out at L709, L708, L710, L716, L715, L711, L707, L712.

4) Check all of OK, please replace IC700, IC701.

5-2-3. Service hint (Any picture / Remark)

/

/

/

,&

/

/

/

/

/

,&

3-14

ONE POINT REPAIR INSTRUCTION

6. VFD HAVEN'T SHOW WHEN YOU TURN THE UNIT ON

When you turn on the SET, it will show 'welcome' message continuously on the

front panel. And speaker have noise output.

6-1. U901 (PT6324)

6-1-1. Solution

Replace PT6324 on VFD display board.

6-1-2. How to troubleshoot (Countermeasure)

1) Check F+_-22V, F-_-25V, VKK_-26V, VDD_+5.6V.

2) Check IC100 to U901 communication resistor R912, R913, R914.

3) Check FB914, FB907, FB906, FB918, FB908, FB910, FB911.

4) If check all of OK, please replace U901.

6-1-3. Service hint (Any picture / Remark)

37

3-15

MAJOR WAVEFORMS

1. IC1 MICOM INTERFACE WAVEFORM

1) During power on 2) During normal play

1

2

3

IC1 Pin33 DVD_CE

IC1 Pin72 RESET

IC1 Pin34 DVD_DO

IC1 Pin35 DVD_DI

4

1

2

3

4

IC1 Pin35 DVD_DI

IC1 Pin33 DVD_CE

IC1 Pin72 RESET

IC1 Pin34 DVD_DO

FIG. 1-1 FIG. 1-2

CVBS

C198 10P

C127 10P

C128 10P

XOUT

R5A9

MRST

R5B2

750R

MCLK

FB600

C196

C195

103

103

GND

UP_SW

TURO+

TURO-

SENSOR

DOWN_SW

DALRCK

ADC_BCK

ADC_DATA

IN_SW

L21

FB600

OUT_SW

OPT_OUT

SPI_DO

SPI_DI

SPI_CLK

SPI_CLK_4MB

COREVCC

CLK/TDMCLK/RBCK

2

AUX3[0]/CAMIN0

IC1

ESS8390/8391SCC

AUX3[1]/CAMIN1

AUX3[2]/CAMIN2

AUX3[3]/CAMIN3

AUX3[4]/CAMIN4

AUX3[5]/CAMIN5

AUX3[6]/CAMIN6

AUX3[7]/CAMIN7

AUX15/656CLK

AUX14/TBCK/TXD1

AUX13/RWS/TDMFS

AUX12/RBCK/TDMCLK

AUX11/RSD/TDMDR

AUX10/TSD[3]

AUX9/HSYNC/TXD2

AUX8/VSYNC/RXD2

31 4

DWE/SEL_PLL19DSCK10DQM11DB712DB613DB514VD3315VS3316VDD17DB418DB319DB220DB121DB022DB823DB924DB1025DB1126DB1227DB1328DB1429VS3330VD3331DB1532AUX733AUX634AUX535AUX436VD3337VS3338VDD39AUX340AUX241AUX142AUX043SPI_CS244SPI_CS3

8

VDAC/YUV6

FDAC/YUV7

RESET/YUV4

COMP/YUV3

RESET

SPDIF_OUT

SPDIF_IN

SPI_DO

SPI_DI

SPI_CLK

80

R5A0

C90

79

390 1%

104

78

77

VREF

76

VD33

75

VS33

74

73

72

MCLK

71

70

69

VDD

68

VS33

67

VD33

66

65

64

63

62

61

60

59

58

57

56

55

54

53

VD33

52

VS33

51

50

49

48

47

46

45

C129

10P

C89
104

C81
104

R551

R5B4

750R

FB600

C182
330P

104

C540

C551

104

TP1

R558 FB272

R554 FB272

R5A8 FB272

R5B8 10R

C550
104

R5B7 FB600

Intel Flash Option

R5B6 NC

R5B9 0R

104

468

DB9

C535

C79

C541

104

468

12357

R5A7

R581 33R

10R

DVD_CLK

DB15

DB14

DB13

DB12

DB11

DB10

MCLK

DALRCK

ADC_DATA

ADC_BCK

104

R84 33R

R109 100R

R110 33R

L24 FB272

C186

GND

100P

V_MUTE

DVD_DI

DVD_DO

DVD_CB

PWMMUTE

DADATA_0

DADATA_1

DADATA_2

DADATA_3

R-X

NC

R43 33R

R543 33R

R566 33R

PWM_MUTE

SPI_CS3

I2C_DATA

I2C_CLK

104

C539

468

12357

R83 33R

R541 33R

R542 33R

DB5

DB6

DB7

DQM

DSCLK

WE

104

C542

468

R5A1

R5A4

10R

10R

12357

12357

R5A5 10R

DB8

DB1

DB0

DB2

DB3

DB4

220uF

C78

C549

16V

104

3-16

2. IC100 MICOM INTERFACE WAVEFORM

1) During power on 2) During normal play

5

5

IC100 Pin25 DVD_CLK

IC100 Pin25 DVD_CLK

IC100 Pin29 DVD_RST

6

IC100 Pin29 DVD_RST

6

FIG. 2-1 FIG. 2-2

MIC_SENS

380_DSP_RST

R100

4K7

5V1

370_BQ_STB

360_ADC_RST

35

34

33NC

32I_VOL_A

31I_VOL_B

R101

4K7

ZD101

TP112

TP210

TP211

PWR_SENS

IC100

LC87F5NC8A

0_BQ_RST

0_PWM_RST

65

18 I_MIC_SENSE

19 I_SPBANA

20 I_DECK_LBAF_A

21 I_DECK_LBAF_B

22 I_HALL_A

23 0_DVD_DO

24 I_DVD_DI

25 I_DVD_CLK

26 0_VFD_DO

27 0_VFD_STB

28 0_VFD_CLK

29 0_DVD_RST

30 0_HP_MUTE

R166 100R

HP_MUTE

DVD_RST

VFD_CLK

VFD_STB

VFD_DO

DVD_CLK

DVD_DI

DVD_DO

LBAF-B

SPBANA

OUT

DGND

IN

R102
680R(2)

BQ_RST

PWM_RST

3

2

1

KIA7042AF

BQ_STB

VOL_A

VOL_B

IC101

3-17

3. SLED DRIVE AND MOTOR WAVEFORM

1) When focus search 2) During normal play

IC401 Pin18 SLED+ IC401 Pin18 SLED+

7

7

8

IC401 Pin15 SPIN+ IC401 Pin15 SPIN+

8

FIG. 3-1 FIG. 3-2

D

B

F0D

TRD

SLD

SPINDLBD

CD_DVD_SLCT

DRV_MUTE

CDLD

DVDLD

DVDMDI

VC

SVREF

OPEN

CLOSE

OUT_SW

IN_SW

UP_SW

DOWN_SW

SPNN

SPNP

PU_DET

SENSOR

TURO+

TURO-

IC401

IP9011

B

F0D

C402

C440

104P

C420

474P

XX

R417

33R

C435

104P

R402

1K2

R448

1K2

28DO6-

DO6+

27

FWD5

26

REV5

25

CTL5

24

BIAS

23

22GND

PGND

03

21IN4

20IN5

DO5-

DO4+

19VCC2

18DO5+

17

16

51DO4-

7

C451
104P

R424

8K2

R410

5K1

C404

100uF

10V

C423

474P

TURD_N+

TURD_N-

TURO+

TURO-

SVREF

GND

SPINDLBD

SLED+

SLED-

SPIN-

SPIN+

TRD

SLD

SPINDLBD

CD_DVD_SLCT

DRV_MUTE

CDLD

DVDLD

DVDMDI

VC

SVREF

OPEN

CLOSE

OUT_SW

IN_SW

UP_SW

SLD

DOWN_SW

SPNN

SPNP

PU_DET

SENSOR

TURO+

TURO-

8

3-18

4. SPINDLE DRIVE AND MOTOR WAVEFORM

1) When focus search failed or there is no disc on tray

IC401 Pin6 FOD

9

IC401 Pin3 F+

10

FIG. 4-1

TR+

TR-

F+

F-

F0D

TRD

DRV_MUTE

CLOSE

OPEN

LOAD+

LOAD-

C438

100P

R447

R422

1K

R408

C188

1K

3K3

C421

103P

C439

100P

1DO1-

2DO1+

3DO2-

GND

C408

220uF

10V

4DO2+

5VCC1

6IN2

7IN1

2

8MUTE

9CTL3

10 RE V3

11 FWD3

12 SV CC

13 DO3+

41

C419

473P

R444

9K1

C413

C428

104P

C409

220uF

10V

104P

C414

R404

C425

20K

R452
100R

GND

104P

DNGDN

103P

G

NC

GND

10

9

IC401

IP9011

DNGP9

3OD

-

3-19

5. RF, FOCUS AND TRACKING ERROR WAVEFORM

1) During normal play 2) When TOC reading

11

12

13

11

IC1 Pin136 RF

IC1 Pin136 RF

12

IC1 Pin120 TE

IC1 Pin121 FE

13

FIG. 5-1 FIG. 5-2

VC

MN

CDLD

SVREF

DVDLD

DVDMDI

C96 NC

C97 NC

C98 223

C585 472

R5B0 10K

123PI124

125

126

127

128

REX

VBO

COLD

V1650

DVDLD

DVDPD

1213

ESS8390/8391SCC

REFD

RF

A

B

C

D

E

F

VC

MN

SPINDLBD

F0D

SLD

TRD

DVDMDI

REFD

VD33RF

FB2500

C15

100uF

16V

C508

100uF

16V

C543

SPNP

+3.3VD

VD33RF

L3

C16
104

R82

4.7K

C76

C5C9

104

104

L511

FB252

C77

C5C1

680p

680p

C5A7

104

C5A1

104

104

C5A2

104

SPNN

C99 102

C100 100p

C184 NC

132

131

130

129

AGC1

AGC2

VPA

133

SPNN/MNTRN

VGA

134

SPNP/MNTRP/IMSR

DRFN

135

DRFP

136

A

137

11

B

138

C

139

D

140

E

141

F

142

G

143

H

144

MIN

145

SLV

146

DMO

147

FDO

148

SLO

149

TRO

150

CDPD

151

REFD

152

AVD33

153

AVS33

154

DVCC

155

VD33

156

C94 154

C95 102

117MP118DB119MB120TE121FE122

IC1 Pin120 TE

IC1 Pin121 FE

OPEN

CLOSE

C75 104

C69 NC

112

113

114

115

116

VPB

VGB

OPEN

CLOSE

OPENSW

IC1

PU_DET

DRV_MUTE

CD_DVD_SLCT

110

111

AMPSTBY

CLOSESW

XIN

XOUT

DADATA_1

DADATA_2

C92 104

C93 104

105

106

107

108

109

VS33

VD33

LDCO

VID_XI

VID_XO

C91 104

R198 33R/HB-121

R220 33R/HB-121

100

101

102

103

104

VDD

VS33

TBCK/PWM_01R/DAC_01R

TWD2/PWM_03L/DAC_03L

TWD3/PWM_03R/DAC_03R

3-20

WIRING DIAGRAM

MDT355 SMPS_350W

LEFT

RIGHT

2P

FAN

MIC PCB

CN905

P7708

SIP1

Y/U/V/VIDEO OUT PUT AUX IN PUT

WOOFER

4p

P7709

FM ANTENNA

5p

AM ANTENNA

CN901

CN904

USB+PHONE PCB

MAIN BOARD PCB

Shief cable

3p

P1

SIP2

P406

15P

9p

J2

J1

LOGIC DECK

CRP42602
EAZ35771501

6p 7p

CN3

CN1

P33

P7904

P400

FFC

9P

P7905

FFC 23P

Connector

MAIN PCB TO USB PHONE PCB

3 DISC DVD DECK

CMS-S79RFVC

MAIN PCB TO 3DISC DECK

MAIN PCB TO MIC PCB

MAIN PCB TO LOGIC DECK

SMPS PCB TO MAIN PCB

5P

MAIN PCB TO KEY3 PCB

MAIN PCB TO DISPLAY PCB

P7709

DISPLAY PCB TO KEY1 PCB

DISPLAY PCB TO KEY2 PCB

P7906

MAIN PCB TO FAN

T

EA

1LOTA

2

2

1

2

2

1

1

1

1

1

4

CON901

FFC 23P

3P

2P

CN902

CN906

KEY3 PCB

KEY2 PCB

8P

CN903

2P

CON903 CO N9 0 2

DISPLAY +KEY BOARD

KEY1 PCB

IR

Controller

VFD

3-21 3-22

BLOCK DIAGRAM

6/

(')7



63,1'/(



ZjkGjohunly

DVD PICKUP

CMS-S77CFS

M

SOL_CONT,MOTOR_CONT,MODE,REC

6

Disc Select

OPEN/CLOSE

VIDEO +COMPONENTS

OUT RCA JACK

FT24C02

IP9011

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

EEPROM 2K

MOTOR
DRIVER

ESS8390SCC

FT24C16

EEPROM 16K

IR

LC87F5NC8A

MCU

M12L128168A-6TG

SDRAM 128M

W25Q16A

FLASH 16M

CLK, DI,D0,CE,

MPEG DSP

PHOTO_OUT,HALF_SW

Logic Deck

Control circuit

R/P SWITCH

CRP42602

LOGIC DECK

BA3216

KIA6225
P/B AMP

BA3308S
REC AMP

MIC

Jack

L /R

L / R

R / Key

Control

TU_SDA,SCLK,RESET

VFD SC,CLK,DO

PT6324

VFD

DRIVER

4052_A,B

BU4052

SWITCH

AM / FM

Tuner

Module

YST996

VFD

DISPLAY

D4558

OP Amp

Portable

In

KEY0,KEY1,KEY2

Front

Key

Control

CD L / R

WM8738

L /R

ADC

D4558

HP Amp

L / Key

Control

PS9831

PWM

SOUND PROCESSOR

S4308

Mic Amp ALC

D+, D-

HP

Jack

USB Host

POWER AMP

TAS5342A

PWM

100WX2

POWER AMP

TAS5342A

150WX1

P Sense

-12V

+12V

USB+5V

+3.5V

V

+12V

MDT355

SMPS

MULTI VOLTAGE

FL

4ΩX2

FR W

3Ω

+31.5

P Cont

FL+

FL-

VKK

3-23 3-24

CIRCUIT DIAGRAMS

1. SMPS - POWER CIRCUIT DIAGRAM

U3

5

Vstr

2

Vcc

4

Ipk

1

GND

FSFM260

C21

22uF/50V

C26
472

R21
47k

Q7
KTA1268

1 2

W17 Jumper

DRAIN

DRAIN

DRAIN

Vfb

C14

47uF/50V

R17
47k

C34

47uF/50V

103/630V

8

7

6

3

D11

RL104F

R24

1 2

1

12

DF06M

2

D2

2

11

10

3

3

W10 Jump er

1

- +

4

4

1

D6
GBU6J

1

-+

4

4

C1

68uF/450V

3

3

450V

330uF/

C9

2

2

9

LF1 SQE2930_4p

12

4

3

8

RT1

NTC 4D-15

t

7

471/400V

C23

6

5

471/400V

C24

C19 104/275V

LF2SQE2930_4p

12

4

3

C25 104/275V

RV1 471

D19
RL104F

4

R20 1.5M/0.5W

F1

3

2

1

T5.0AL250V

2

CONN FLEX 2

JR5 MT_HOLE

1

1

1

J3

JR6 MT_HOLE

1

1

C3

56k/2W

D5
UF4007

C20

272

10

3

W12 Jumper

1 2

C33
224

EER2828(MULTI)

1

R2

3

2

R4

4

10

R10

5

1

6

3

3

4

4

3

LTV-817

3

PC2

4

4

HS1 47*17

1

U7 FSCQ1265RT

DRAIN

Vcc

F/B4Sync

GND

2

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

D1 RL104F

T1

10

10

1

3

2

4

5

6

2

1

2

1

2

R33

1k

2

1

2

1

1

5

9

8

7

12

13

11

15

14

PC1
LTV-817

561/1kV

C36

102

D3 SB360

1000uF/16V

9

D7 UG 2D

8

D8 SB360

7

12

13

D14 RL104F

11

D17 RL104F

15

D20 SR140

14

R16

2.7k

C32

1000uF/16V

100uF/50V

C4

C10

C12

W16 Jumper

R31

1.5k

C2

2.2uF/50V

C7
1000uF

1

2

/25V

1 2

W13
Jumper

1 2

W14
Jumper

D22

RL104F

100uF/25V

Q5

KTC3205

U2 7 8R12

3

GND

1

IN

U4 278R33

1

IN

GND3CON

C13

C22
330uF/16V

T2

6

5
4

13
14
15

3

16
17

2

18
10
11

1

12

EER4242/3335

LTV-817

L1 22uH

OUT

R8 1k

R15 56

7
8
9

PC3

C37 222/400V

C5

1000uF/16V

4

CON

2

OUT

2

4

100uF/6.3V

R12
36k

KTA1273

C15 470pF/1kV

1

1

2

3

3

D21

20A/200V

1

4

4

3

2

3

R7 4.7 k

C11

1k

Q6

2

2200uF/50V

1

2

1

R6

R3
18k

C29

R32 470

U1 78R05

OUT

IN

GND3CON

C8

100uF/16V

KTA1268

HS2

15*10

C30

2200uF/50V

2

4

100uF/6.3V

W18Jumper

1 2

Q4

1

C31

2200uF/50V

R34
1k

C6

KTC3205

R9
1k

R1 4. 7k

R14

R25
33k

Q2

R11
10k

560

R5 4. 7k

W8 Jumper

C18
47uF/10V

R26
33k

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.

W1 Jumper

1

1

R27
33k

2

2

W15 Jump er

R28
33k

D9
open

1 2

W2 Jumper

1

2

W3 Jumper

1

2

D25

1N4148

D10
3V

W7 Jumper

2

1

R18 18k

C27 2.2uF/50V

U5

KA431/TO

Danger if fuse is incorrectly replaced.

Replace only with the type identical to fuse rating

and(or) model name described in main label.

R22

1.5k

R29
75

CAUTION:

D26
1N4148

C16

10uF/50V

NOTE :

1. Shaded(

2. Voltages are DC-measured with a digital voltmeter

W4

12

Jumper

W6

12

Jumper

C28 2.2uF/50V

U6

KA431/TO

) parts are critical for safety.

Replace only with specified part number.

during Play mode.

8P

8.GND

8

7.CD_CTRL

7

6.PWR_CTRL

6

5.PWR_SENS

5
4

4.5.6V

3

3.VKK

2

2.FL-

1

1.FL+

J1

W11

12

Jumper

W9

12

Jumper

W5

12

Jumper

J2

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15

15P

JR1 MT_HOLE

R19

2.7k

R23
2k

R30
150

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

0

JR2 MT_HOLE

JR3 MT_HOLE

JR4 MT_HOLE

JR7 MT_HOLE

JR8 MT_HOLE

1.GND

2.GND

3.GND

4.-12V

5.+12V

6.+12V

7.5V

8.5.9V

9.3.3V

10.3.3V

11.GND

12.GND

13.36V

14.36V

15.36V

1

1

1

1

1

1

1

1

1

1

1

1

A

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

3-25 3-26

2. MAIN - DVD MPEG CIRCUIT DIAGRAM

R116

12

11

COMPOSITB

10

9

8

7

6

5

4

3

2

1

A

1M

X501

27MHz

C533

C536

27P

4.7K

R158

4.7K

R154

4.7K

R156

4.7K

R89

Q500

KTD1304S

Q503

KTD1304S

Q502

KTD1304S

Q501

KTD1304S

Q506
A1298Y

Q507

KTD1304S

FB600

R548

L504

220nH

C200

82P

C146
470P

L19

220nH

C126

82P

L25

220nH

C131

82P

R88

R118

10K

4.7K

27P

Y/G

PB/B

PR/R

+3.3VD

C3

104

+3.3V

R544

NC

DEBUG/NOMAL MODE

R555

4.7K

L23

R92

FB272

4.7K

R90

C193

4K7

104

GND

R91

4.7K

R93

4.7K

R596

4.7K

R95

4.7K

470nH

2.2UH

470nH

L31

L28

L20

470nH

XOUT

XIN

Y_G

R509

75R

CVBS

RF

R173

75R

FB272

10K

A

B

C

D

PB_B

E

F

R113

75R

VC

MN

SPINDLBD

PR_R

F0D

SLD

TRD

R155

DVDMDI

75R

REFD

VD33RF

L541

+12VA

C538

104

V_MUTE

DMA4

DMA5

DMA6

DMA7

C189

100P

DMA8

DMA9

DMA11

DMA3

DMA2

DMA1

DALRCK

DMA0

DMA10

BANK1

CAS

BANK0

VD33

WE

+3.3VD

C503

470P

L26

R515

R87

FB272

RASO

+3.3VD

OPT_OUT

SPI_CS3

DVD_CB

OPTION

L201

FB102K

L202

FB102K

L205

FB102K

L206

FB102K

+3.3VD

470uF

470uF

470uF

470uF

C217

10V

C216

10V

C218

10V

C219

10V

KDS226
Q11

1

KDS226

Q10

1

KDS226
Q12

1

KDS226
Q13

1

JK201

RGB&CVBS

3

2

1

2

3

4

5

6

GND

3

2

3

2

3

2

+3.3VD

VD33RF

L3

FB2500

C15

C16

100uF

104

16V

REFD

C508

100uF

16V

C5C1
680p

C543

104

+3.3V

NC

R534

GND

R96

R5A2 10R

R5A6

10R

L528

FB2500

C80

100uF

16V

COMPOSITB

Y/G

PB/B

PR/R

L511

FB252

C77

680p

C5A7

104

C5A1

104

C5A2

104

R132 4K7

NC

R5A3

10R

R82

4.7K

C76

C5C9

104

104

C5A3

104

R533 NC

C5A4

104

C548

104

+5VM

+5.6VA

C184 NC

VPA

133

VGA

134

DRFN

135

DRFP

136

A

137

B

138

C

139

D

140

E

141

F

142

G

143

H

144

MIN

145

SLV

146

DMO

147

FDO

148

SLO

149

TRO

150

CDPD

151

REFD

152

AVD33

153

AVS33

154

DVCC

155

VD33

156

VS33

157

VDD

158

SIN

159

SOUT

160

DMA4

161

DMA5

162

VD33

163

VS33

164

DMA6

165

DMA7

166

DMA8

167

DMA9

168

DMA11

169

DMA3

170

DMA2

171

DMA1

172

DMA0

173

DMA10

174

DRAS2

175

DRAS1

176

C534

104

C513

NC

R64

100R

R600

22K

VC

DVDMDI

128

DVDPD

MN

CDLD

SVREF

DVDLD

C96 NC

C97 NC

C98 223

C585 472

R5B0 10K

123PI124

125

126

127

REX

VBO

COLD

V1650

DVDLD

SPNP

SPNN

C99 102

C100 100p

132

131

130

129

AGC1

AGC2

SPNN/MNTRN

SPNP/MNTRP/IMSR

OPEN

CLOSE

C75 104

C94 154

C95 102

C69 NC

112

113

114

115

116

117MP118DB119MB120TE121FE122

VPB

VGB

OPEN

CLOSE

OPENSW

IC1

ESS8390/8391SCC

VD332VS333DSC14DSC05DRAS0/SEL_PLL26DCAS/SEL_PLL37DOE/SEL_PLL08DWE/SEL_PLL19DSCK10DQM11DB712DB613DB514VD3315VS3316VDD17DB418DB319DB220DB121DB022DB823DB924DB1025DB1126DB1227DB1328DB1429VS3330VD3331DB1532AUX733AUX634AUX535AUX436VD3337VS3338VDD39AUX340AUX241AUX142AUX043SPI_CS244SPI_CS3

1

C199

47P

1

CAS

RASO

CSO

KIA78R05P

IC951

34

R557 FB272

104

C539

468

12357

R83 33R

R541 33R

R542 33R

DB5

DB6

DB7

DQM

DSCLKWEDALRCK

2

C54

C55

100uF

104

25V

GND

104

C542

468

R5A1

R5A4

10R

10R

12357

R5A5 10R

DB1

DB0

DB2

DB3

DB4

4K7

R124

GND

USB_N

USB_P

R2C1 22R

R2C0 22R

R2A8

R2A9

15K

15K

PU_DET

DRV_MUTE

111

CLOSESW

468

12357

DB9

DB8

L208

FBS2545

C266

100P

XIN

XOUT

DADATA_1

DADATA_2

CD_DVD_SLCT

C93 104

104

105

106

107

108

109

110

AMPSTBY

VDD

VS33

VD33

LDCO

VID_XI

VID_XO

104

C535

DADATA_0

C92 104

C91 104

R198 33R/HB-121

R220 33R/HB-121

99

100

101

102

103

VS33

VD33

TBCK/PWM_01R/DAC_01R

TWD2/PWM_03L/DAC_03L

TWD3/PWM_03R/DAC_03R

468

12357

R5A7

10R

DB15

DB14

DB13

DB12

DB11

DB10

MCLK

DALRCK

ADC_DATA

1K

0R

R150

0R

RXXX

XXX

ADDATA

ADMCLK

ADLRCK

T+22

T+21

T+20

T+24

C267

C265

104P

100P

GND

R581 33R

DVD_CLK

ADC_BCK

0R

XXR

ADBCK

USB JACK

R84 33R

R109 100R

R110 33R

DVD_DI

DVD_DO

DVD_CB

PWMMUTE

0R

RXX

R304

PWM_MUTE

CN205

5

GND

4

5V_USB

3

D-

2

D+

1

GND

MIC_L

MIC_R

USB_P

DADATA_3

USB_N

C187 100P

GND

R86 33R/HB-121

R560 33R/HB-121

91

92

93

94

95

96

97

98

MIC_L

AVS33

MIC_R

USB_NO

ADC_BIAS

TWS/PWM_01L/DAC_01L

TWD0/PWM_02L/DAC_02L

TWD1/PWM_02R/DAC_02R

CLK/TDMCLK/RBCK

AUX3[0]/CAMIN0

AUX3[1]/CAMIN1

AUX3[2]/CAMIN2

AUX3[3]/CAMIN3

AUX3[4]/CAMIN4

AUX3[5]/CAMIN5

AUX3[6]/CAMIN6

AUX3[7]/CAMIN7

AUX14/TBCK/TXD1

AUX13/RWS/TDMFS

AUX12/RBCK/TDMCLK

AUX11/RSD/TDMDR

AUX9/HSYNC/TXD2

AUX8/VSYNC/RXD2

C79

C541

104

104

R43 33R

R543 33R

R566 33R

L24 FB272

C186

GND

100P

DADATA_2

DADATA_3

0R

0R

R_X

DADATA3

PWM_MUTE

I2C_DATA

I2C_CLK

V_MUTE

DADATA_0

DADATA_1

RX

0R

0R

R194

DADATA0

DADATA1

DADATA2

+3.3VD

C14
103P

89

90

AVD33

USB_PO

VS33PLL

VD33PLL

TDAC/YUV1

UDAC/YUV0

CDAC/YUV2

YDAC/YUV5

VS33DAC

VD33DAC

VDAC/YUV6

FDAC/YUV7

RESET/YUV4

COMP/YUV3

AUX15/656CLK

AUX10/TSD[3]

SPDIF_OUT

SPDIF_IN

SPI_CS3

RESET

SPI_DO

SPI_DI

SPI_CLK

470uF

GND

R85
33K

L519

FB2500

C516

C88 473

105

R540 22K

100uF

C591

16V

FB2500

+3.3VD

L524

L522

FB2500

0R

C87

C529

R272
88

87

86

85

84

83

82

104P

81

C68

80

R5A0

C90
79

390 1%

104
78

77

VREF

76

VD33

75

VS33

74

73

R5B4

72

MCLK

VDD

VS33

VD33

VD33

VS33

R-X

NC

C18

10V

FB600

71

70

104

69

C540

68

67

66

C551

65

104

64

63

62

61

60

59

58

57

56

55

54

53

52

51

50

49

48

47

46

45

RCHOUT

LCHOUT

IC501

NC

1.5V

2

3

1

104

C85
104

C89
104

C81
104

C182
330P

R558 0R

R554 FB272

R5A8 FB272

R5B8 10R

C550

104

R5B7 FB600

Intel Flash Option

R5B6 NC

R5B9 0R

C78

220uF

16V

COREVCC

100uF

16V

C86
104

PR_R

PB_B

Y_G

CVBS

C198 33P

C127 33P

C128 33P

R551

750R

TP1

XOUT

R5A9

MRST

R5B2

750R

MCLK

FB600

C196

C195

103

103

GND

UP_SW

TURO+

TURO-

SENSOR

DOWN_SW

DALRCK

ADC_BCK

ADC_DATA

IN_SW

L21

FB600

OUT_SW

OPT_OUT

SPI_DO

SPI_DI

SPI_CLK

SPI_CLK_4MB

COREVCC

C549

104

R203

270R(3)

+12VA

4V7

ZD201

C201

4.7uF
50V

R201
91R

R202

C202

91R

4.7uF
50V

C204

C205

222P

222P

GND

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

+3.3VD

DB0

DB1

DB2

DB3

DB4

DB5

DB6

DB7

DQM

WE

CAS

RASO

CSO

BANK0

BANK1

DMA10

DMA0

DMA1

DMA2

DMA3

SPI_CS3

SPI_DI

L510

FB2500

C107

104

C110

104

C557

104

C5B8

104

330P

C558

C220

C221

47uF

103P

16V

GND

C225

103P

GND

IC502

M12L128168A-6TG

VDD1

1

DQ0

2

VDDQ3

3

DQ1

4

DQ2

5

VSSQ6

6

DQ3

7

DQ4

8

VDDQ9

9

DQ5

10

DQ6

11

VSSQ12

12

DQ7

13

VDD

14

LDQM40NC

15

/WE

16

/CAS

17

/RAS

18

/CS

19

BA0

20

BA1

21

A10/AP

22

A0

23

A1

24

A2

25

A3

26

VDD

27

C111

104

R5N0

R529

R94
4K7

0R

47K

FB272

1

2

3

4

L203

R97
10K

1

2

3

4

GND

W25Q16A

IC504

FT24C02

E0

VDD

E1

E2

SCL

VSS

SDA

+3.3VD

GND

R574

4.7K

CE

SD

WP

VSS5SI

IC503

8

WC

7

6

5

L215

FB272

DNG

VSS

DQ15

VSS

DQ14

DQ13

VDD

DQ12

DQ11

VSS

DQ10

DQ9

VDD

DQ8

VSS

UDQM

CLK

CKE

A11

VSS

C226

103P

9AVDD

10 AGND

11 NOHP

12 LR CLK

13 MCL K

14 DGND

NC

A9

A8

A7

A6

A5

A4

FB272

L509

HOLD

FB272

WM8738

C517

220uF

10V

BUS-DVD

C117
104

C118
104

C116
104

C192
104

I2C_DATA

C120
104

DSCLK

DMA11

DMA9

DMA8

DMA7

DMA6

DMA5

DMA4

+3.3VD

VD33D

SPI_CLK

SPI_DO

+3.3VD

I2C_CLK

UP_SW
DOWN_SW

DB15

SENSOR
TURO­TURO+

DB14

CD_DVD_SLCT

DB13

DRV_MUTE
OPEN

DB12

CLOSE
OUT_SW

DB11

IN_SW
SVREF

DB10

CDLD
DVDLD

DB9

VC
DVDMDI

DB8

SPNN
SPNP
RF
F

DQM

E
A
B
C
D
F0D
TRD
SLD
SPINDLBD

PU_DET

DVD_CLK

MRST

DVD_DI

DVD_DO

DVD_CB

USB_N

USB_P

MIC_L

MIC_R

R197 10K

C149
10uF

GND

16V

C147

R193

10uF

51K

16V

C148

R196

10uF

51K

16V

VD33D

CD1

VCC

1

SPI_CLK_4MB

SPI_CLK

MRST

SPI_DO

SPI_DI

SPI_CS3

IC3 SN74LV00A

D1

2

CP1

3

SD1

4

Q15

5

Q16

6

GND

7

R108 NC

14

CD2

13

D2

12

CP2

11

SD2

10

Q29

9

Q28

8

54

53

52

51

50

49

48

47

46

45

44

43

42

41

39

38

37

36

35

34

33

32

31

30

29

28

C530

104

R530

10K

VDD

8

7

SCK

6

L508

R1451KR98

1K

CXX

CX

NC

NC

+3.3VD

+12VA

C223
47uF

10V

GND

7

RIN8LIN

6VREF

5CAP

FMT

4

3BCLK

2SDATO

1DVDD

IC201

C121

C123

C124

10uF

104P

C122

10uF

104P

R226 33R

R229 33R

G

DN

R151 33R

R175 100R

10V

10V

GND

ADBCK

ADDATA

ADMCLK

ADLRCK

C515

104

SPI_RST

SPI_DO

GND

UP_SW
DOWN_SW
SENSOR
TURO­TURO+
CD_DVD_SLCT

DRV_MUTE
OPEN
CLOSE
OUT_SW
IN_SW
SVREF
CDLD
DVDLD
VC
DVDMDI
SPNN
SPNP
RF
F
E
A
B
C
D
F0D
TRD
SLD
SPINDLBD

PU_DET

DVD_CLK

DVD_RST

DVD_DI

DVD_DO

DVD_CB

USB_N

USB_P

MIC_SIG

DOWNLOAD & DEBUG

CN2 NC

1

GND

2

SPI_RST

3

SPI_DO

4

SPI_DI

5

SPI_CLK

6

SPI_CE

7

3.3V

+3.3VD

+12VA

LG-MDT355/MDD265/MDD65/MDD105

MAIN BOARD DVD MPEG(ESS8390)

3-27 3-28

3. MAIN - MCU CIRCUIT DIAGRAM

P7708

CN/2PIN

2

TP184

C840

16V

VSS4

GND

R100

104P

C812

104P

C813

4K7

5V1

+5V_UCOM

C114

50

49D_REC_SW

48D_REC_BIAS

47D_SCL_B

46

45D_MOTOR

44

43I_DSP_ESY

42I_HP _SNS

41I_PORT_SNS

40VDD4

39

380_DSP_RST

37

360_ADC_RST

350_BQ_RST

34

33NC

32I_VOL_A

31I_VOL_B

R101

4K7

ZD101

FAN DC(6.5 11V)

1

GND

TP185

GOTO FAN

104P

GND

TP106

TP104

TP103

TP101

TP109

TP110

R199 4K7

104P

C112

TP112

TP210

TP211

OUT

DGND

R102
680R(2)

PWR_SENS

3

4

VSS

IN+

IC801

MC4580

1N+61N-7OUT8VCC

5

R816 20K

C807

R815 7K5

D102

IN4001

C57
100uF
16V

D_REC_MUTE

REC_BIAS

D_SCL_B

MOTOR

HP_SENSE

BQ_STB

BQ_RST

PWM_RST

VOL_A

VOL_B

3

2

1

IN

IC101

KIA7042AF

R808 7K5

C802

R809 20K

1

2

IN-

OUT

220P

220P

OTW

AMP_RST

AMP_SD

AMP_PROTECT

BQ_RST

BQ_STB

PWM/DSP_DAT

PWM/DSP_CLK

PWM_RST

SPBANA

HP_MUTE

HP_SENSE

EEPROM_DATA

EEPROM_CLK

X1

X2

XT1

XT2

D101

IN4001

RESET

D_REC_MUTE

PB_MUTE

REC_BIAS

D_SCL_B

MOTOR

HALL_B

LBAF-B

TAPE_L

TAPE_R

GND

C803

C805

DNG

G

D

N

+5.6V

R104
330K

104P

C109

220uF

C101

10V

R1A9

1K

R63

100R(FX)

R153 100R(FX)

+12VA

47P

C674

R683 47K(FX)

C675

R684 47K(FX)

R810
560R

4u7

GND

R817
560R

4u7

GND

R902 104

L5F1

C1F2

R105
4M7

X101

32.768KHz

C103

C104

30P

30P

R191 4K7

IC102

KIA7027

1

3

VCC

OUT

GND

2

FB613 FB2500

FB612

BBAD

FB611

BBAD

47P

C804

X(272)

C806

X(272)

104

104P

PWM/DSP_DAT

PWM/DSP_CLK

R107

1M

X100

9.8304MHz

33P

C105

C106

GNDGND

G

DN

DN

G

AMP_RST

AMP_SD

AMP_PROTECT

BQ_RST

BQ_STB

PWM_RST

SPBANA

HP_MUTE

HP_SENSE

33P

OTW

+5V_UCOM

104P

C108

REC_MUTE

PB_MUTE

REC_BIAS

B-SOL

MOTOR

TA+12V

LCHOUT

RCHOUT

HALL_B

LBAF-B

TAPE-L

TAPE-R

7NC

8VCC

1B0

2B1

TO PWM

R189 100R

R190 100R

C102
223P

6SCL

IC103

FT24C16A

3B2

4GND 5SDA

TO DECK

TO ADC IC

LG-MDT355/MDD265/MDD65/MDD105

MAIN BOARD MCU

12

23P/FFC

P7905

F+

11

10

9

8

C163
C157

C142
C139
C145

7

6

5

C144
C154
C166
C159
C143
C156
C136
C133
C138
C140
C141
C158
C155
C135

GND

C412
104P

C415
104P

C417
104P

DNG

F-

-VKK

VFD-STB

VFD-DATA

VFD-CLK

DGND

+5V6

REMOTE-INT

VOL+A

VOL-B

KEY1

KEY3

+12VA

DGND

VOL_LED7

TO FRON PCB BOARD

VOL_LED6

VOL_LED5

VOL_LED4

VOL_LED3

VOL_LED2

VOL_LED1

VOL_LED8

104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P

GND

DNG

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

C190
C181
C177
C173
C172
C176
C194
C171
C178
C167
C180
C174
C165
C164
C175
C191
C162
C170
C160

104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P
104P

TP1A5

TPA16

TP1A7

TP134

GND

4

3

MIC_SENS

MIC OUT

TO MIC BOARD

2

1

A

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

C873

104P

SIP2

+12VA

C874

GND

P7904

8P/2.0MM

FROM SMPS

104P

GND

1

2

3

4

FL+

FL-

VKK

12345

TP136

TP135

TP137

GND

C134

104P

C35

104P
R67 0R
R68 0R

JK554

AUX-IN

+5.6V

TP1A4

PWR_CTRL

PWR_SENS

678

TP138

TP139

FB2K7

DGND_CPU

CD_PWR_CTRL

TP140

TP141

GND

1

7

8

9

3

2

6

5

4

L2

GND

+12VA

R183 100R

R184 100R

R181 100R

R178 100R

R169 100R

R170 100R

R162 100R

R129 100R

R55 100R

R56 100R

R57 100R

R58 100R

R59 100R

R60 100R

DVD_CLK

DVD_RST

DVD_DI

DVD_DO

DVD_CB

TO DVD ESS8390

MIC_SIG

KEY3

KEY2
GND

P7906

3P/2.0MM

TO KARAOKE KEY BOARD

L13

2.2UH

L14

2.2UH

L15

2.2UH

P1

GND

GND

GND

VFD_DO

VOL_A

VOL_B

DVD_DI

DVD_DO

DVD_CB

MIC_SIG

POT_R

POT_L

15P/2.5MM

FROM SMPS

12345

-12VA

TP197

R117 100K

104P

C882
104P

GND

P7709

DBBUG0

DBBUG1

DBBUG2

432

5

TP196

TP195

R192 100K

R164 100K

+12VA

KEY1

DBBUG2

KEY3

DBBUG1

DBBUG0

R44

TP165

R1C7 100R

R114 100R

R136 100R

R182 100R

GND

FB9

FB2K5

FB8

FB2K5

R1C5 100R

R1D1 100R

C825
10uF

50V

TP186

R1C6 100R

R140 4K7

R127 4K7

R163 4K7

103P

103P

C28

C31

R18

100R

C826

104P

PWM/DSP_DAT

PWM/DSP_CLK

DBBUG2

DBBUG1

DBBUG0

EEPROM_DATA

EEPROM_CLK

TUNER_RST

KEY3

TUNER_CE

KEY2

TUNER_DAT

TUNER_CLK

TUNER_GP02

VFD_PWR

DVD_CB

REMOCON

R115

330K

POT_L

TAPE_L

R141 NC

220R

+12VA

-12VA

R5 0R(AUX)

R803

GND

C22
NC

R48

NC

GND

POT_R

TAPE_R

+5.6V

R606

GND

6K8

VFD_PWR

PWR_CTRL

PWR_SENS

VFD_STB

VFD_CLK

REMOCON

VOL_LBD7

VOL_LBD6

VOL_LBD5

VOL_LBD4

VOL_LBD3

VOL_LBD2

VOL_LBD1

VOL_LBD8

DVD_CLK

DVD_RST

R23

0R

1

2

3

GND

R20
47K

R892
7K5

C881
330P

R886

7K5

R21

47K

880

330P

GND

MIC_SENS

MIC_SIG

C883

C115

104P

TP198

4K7

FB10

FB6

-12VA

RESET

GND

+12VA

GND

GND

1

16VDD

1Y0

+5VM CD

+12VA

678

C884

+5VM

RESET

R106
100R

81 I_BASS_JOG_B

82 I_MIDOLB_JOG_B

83 I_MIDOLB_JOG_A

84 0_ADC_CLK

85 0_ADC_DAT

86 0_PWM/DSP_DAT

87 0_PWM/DSP_CLK

88 VSS3

89 VDD3

90 DBGP2

91 DBGP1

92 DBGP0

93 P_BBP_DAT

94 P_BBP_CLK

95 I_TREELE_JOG_B

96 I_TREELE_JOG_A

97 NC

98 0_TUNER_RST

0_TUNER_CE

99

100 P_TUNER_DAT

FB2K5

BUS-MCU

R13 0R(AUX)

15X2

14X1

YD4052

2Y23Y4Y3

C23

104P

+5.6VA

FB2K5

13X

IC200

NC

+5.6_MCU

C'17

+3.3VD

9

GND

80I_BASS_JOG_A

1 0_TUNER_CLK

C26

12X0

5Y1

104P

0R

4052_A

790_4052_1A

2 0_TUNER_GP02

R122 22K
R120 10K

R119 10K

11X3

6INH

X(10K)

R142

PGND

+3.3VD

10

1112131415

104P

C887

+3.3VD

GND

4052_B

R605 100R

780_4052_1B

3 0_VFD_PWM

103P

R61 10K

4052_A

10A

7VEE

GND

R897

R604 100R

4052_B

77NC

4I_PWR_SENSE

9B

8VSS

820P

GND

PGND

TP111

GND

C30

+36VP

+36VP

+36VP

KRC103S

Q801

R849
10K

+36VP

OTW

HALL_B

75I_HALL_B

76

OTW

5VFD_RST

6I_DVD_CB

RESET

C21

C24

103P

103P

GND

VOL_LBD7

VOL_LBD8

720_VOL_LBD7

730_VOL_LBD8

740_VOL_LBD0

7I_REMOCON

8 RESET

9XT1

R137

100R

MICON_RST

XT1

TUNER_RST

TUNER_GP02

R840 33R

R839 1K

FB5

FB4FB2K5

FB2K5

8

9

C25

9876543

103P

GPIO2/INT

RST

VOL_LBD6

710_VOL_LBD6

10 XT2

XT2

TUNER_CE

R836 33R

FB3

FB2K5

7

SEN

TUNER_DAT

R835 33R

FB2FB2K5

6

VOL_LBD5

700_VOL_LBD5

11 VSS1

TUNER_CLK

R832 33R

SDIO

TUN800

FB1FB2K5

5

R834

4K7

SCLK

VOL_LBD4

690_VOL_LBD4

12 X1

X1

4

FAN_CTRL

VOL_LBD3

LC87F5NC8A

X2

3

VCC

VOL_LBD2

670_VOL_LBD2

680_VOL_LBD3

IC100

13 X2

14 VDD1

KEY1

GND

FB800
FB600

R838

4K7

1

2

2

1

LCH

RCH

GND

GND

VOL_LBD1

660_VOL_LBD1

15 I_KEY1

R176 100R

R177 100R

KEY2

R49 1K_NC
R50
R51 1K_NC
R52 3K3
R53 3K3

R65

X(10K)

C834

104P

GND

+12VA

R846 330R
R845 330R

Q800

D8550

R844 330R
R843 330R
R842 330R

C841

R848

R847
47K

103P

R885
47K

AMP_RST

PWR_CTRL

1K

FAN_CTRL

C53

16:9/4:101

TP166

SCART_TVMODE101

SCART_RGB_VIDEO101

R27 22K

R603 100R

R112 100R

570_AMP_PON

580_PWR_CTRL

590_E XP_CLK1

600_EXP_DAT1

610_FAN_CTRL

620_SCART_RGB_VIDEO

630_SCART_TVMODE

640_16:9_4:3

65W_MUTE

16 I_KEY2

17 I_KEY3

18 I_MIC_SENSE

19 I_SPBANA

20 I_DECK_LBAF_A

21 I_DECK_LBAF_B

22 I_HALL_A

23 0_DVD_DO

24 I_DVD_DI

R166 100R

R602 100R

DVD_DI

DVD_DO

LBAF-B

SPBANA

MIC_SENS

KEY3

R806

C800

4.uF

C29

820P

FB601

FB2K7

FB901

NC

C809

4.7uF

470R

R807

100K(27K)

+3.3VD

R814

100K(27K)

R813
470R

+3.3VD

+5VM

3K3_NC

GND

C836
100uF

16V

104P

100uF

AMP_SD

PB_MUTE

AMP_PROTECT

104P

C113

55VDD2

56VSS2

25 I_DVD_CLK

26 0_VFD_DO

VFD_DO

DVD_CLK

C801

22P

GND

C808

22P

R805

TP107

R54 100R

510_PB_MUTE

520_T APE_AB

53I_AMP_PROTECT

54I_AMP_SD

D_REC_MUTE

D_SCL_A

I_DSP_IRQ

0_BQ_STB

0_PWM_RST

27 0_VFD_STB

28 0_VFD_CLK

29 0_DVD_RST

30 0_HP_MUTE

HP_MUTE

DVD_RST

VFD_CLK

VFD_STB

C810
47uF

16V

C811
47uF

16V

R811

82R

82R

+12VA-12VA

3-29 3-30

4. MAIN - SERVO CIRCUIT DIAGRAM

12

C401
47uF

16V

C422

104P

11

GND

P400

23P FFC

10

HFM_VCC

RF_OUT

LD_DVD

MD_DVD

VR_DVD

GND_PD

9

VREF

VCC

F

E

A

D

8

C

B

FOCUS-

OPU(COMMON)

TRACK ING-

TRACK ING+

FOCUS+

7

SW_PDIC

GND_LD

LD_CD

MD_CD

VR_CD

HFM_VCC

1

RF_OUT

2

LD_DVD

3

MD_DVD

4

VR_DVD

5

GND_PD

6

VREF

7

VCC

8

F

9

E

10

A

11

D

12

C

13

B

14

F-

15

T-

16

T+

17

F+

18

SW_PDIC

19

TP401

20

LD_CD

21

MD_CD

22

VR_CD

23

6

C424

5

P604

15P/FFC

SL-

SL+

DN SW

UP SW

OP SW

LD-

LD+

PHOTO

GND

TUR_N-

TUR_N+

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

4

3

(SP)DCMO-

(SP)DCMO+

CL SW

D_SENSE

2

104

GND

R426

C431

33R

D404

GND

C441

104

R453
220K

GND

L401

FB600

C442

104

C436

104P(X)

C432

104P(X)

R481 2R2(X)

DAN202K

R415

22R

D401

DAN202K

R414
100K

L400

FB600

GND

R491

2R2(X)

R466

2R2(X)

GND

D3

DAN202K

2SA1037K

D2

DAN202K

2SA1037K

C434

104

R484 27R R488 27R

R483 47K

KTC3875S

Q406

Q405

Q407

104P(X)

Q402

2SK3018

Q401

2SK3018

R431 10K

R458
2R2(2)

C429

R418
100K

Q403

KTC3875S

GND

GND

C427
102P

102P

R456
2R2(2)

R420
1OK

C406
47uF

16V

KTC3875S

C407

220uF

6V3

C410

220uF

6V3

R411
10K

C426

104P

R446
100R

R416
100R

Q404

C27

47uF

16V

C403

100uF

R421

10K

GND

R413
10K

C544

104P

R4B3 100R

R4B4 100R

R406 100R

R443
10K

L520

100uF

RFVCC50

CDLD0

L1

C418

104P

C511

16V

CHGND

DVDLD0

2500

CD_DVD_SLCT

C20

104P

GND

VD33RF

2500

DOWN_SW

TURD_N+

PU_DET

DVDMDI

CDLD

DVDLD

+3.3VD

SPIN-

SPIN+

SLED-

SLED+

UP_SW

OUT_SW

IN_SW

LOAD-

LOAD+

SENSOR

TURD_N-

COREVCC

R130

0R

C425

C423

103P

474P

R444

R447

1K

F0D

RF

SLD

R448

1K2

CLOSE

VC

OPEN

F

E

A

D

C

B

F-

TR-

TR+

F+

LOAD+

LOAD-

SLED+

SLED-

F+

F-

TURD_N-

TURD_N+

TURO-

TURO+

C414
104P

GND

27K

R121

1K5

C438

100P

22K

C402
104P

R66

5.1K

R69

R70

C612

100uF

R144

10K

R410

470R

5VM

C409

220uF

10V

C419

R62

473P

R139

2.2R(1206)

R143

2.2R(1206)

Q4

C8550D(DIP)

1

VINFC

2

TRB_1

3

REGO_2

4

VINSL+

5

REGO_1

0R

6

RED

0R

7

REV

5VM

C439

100P

GND

H1

8

VCC1

9

VOTP-

10

VOTR+

11

VOSL+

12

VOSL-

13

VOFC-

14

VOFC+

S3053+S8082

5VM

8VD2

7PVCC

6SVCC

5VIN2 4VIN1

C617
104P

10V

GND

R131

2.2R(1206)

R134

2.2R(1206)

IC806

S8082

IC808
S3053

+3.3VD

R77

100R

28

MUTE

27

BIAS

26

VINTK

TRB_2

RESET

VINLD

GND

H2

VCTL

VCCD

VCC2

VOLD-

VOLD+

VOTK-

VDTK+

1GND

2VD1

3VCTL

R147

25

5K6

24

23

22

21

20

19

18

17

16

15

ZD1

3V3

R601

1R

GND

R424

4K7

R79

6.8K

GND

R78
15K

R499

R409

12K

12K

R450

R451

0R

0R

R419

R403

22K

47K

GND

R404

47K

C421
103P

R445

0R

R425

0R

GND

R408

C420

474P

3K3

R422

1K

R402

1K2

GND

C188

RF

F

E

SVREF

SPINDLBD

5VM

SPIN+

SPIN-

TR+

TR-

SPNN

SPNP

A

C

D

B

F0D

TRD

TRD

SLD

SPINDLBD

CD_DVD_SLCT

DRV_MUTE

CDLD

DVDLD

DVDMDI

VC

SVREF

OPEN

CLOSE

OUT_SW

IN_SW

UP_SW

DOWN_SW

SPNN

SPNP

PU_DET

SENSOR

TURO+

TURO-

+5VM

NC

DRV_MUTE

R417

33R

C435
104P

R432

56K

RF

F

E

A

C

D

B

F0D

TRD

SLD

SPINDLBD

CD_DVD_SLCT

DRV_MUTE

CDLD

DVDLD

DVDMDI

VC

SVREF

OPEN

CLOSE

OUT_SW

IN_SW

UP_SW

DOWN_SW

SPNN

SPNP

PU_DET

SENSOR

TURO+

TURO-

L404

FB600

FBS2545

L4

RFVCC50

5VM

1

A

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

GND

5VM

L402

FB2500

R482 4K7

R485 4K7

R487 4K7

R490 4K7

R489 4K7

C437

104P

GND

C433

104P

BUS-RF

BUS-RF

LG-MDT355/MDD265/MDD65/MDD105

MAIN BOARD SERVO

3-31 3-32

5. MAIN - D/AC CIRCUIT DIAGRAM

R103

10K

C681
47uF

C842

104P

R868

68K

C851

R851

10K

25V

8

7

6

5

47P

R875

4K7

R850

10K

VCC

OUT

1N-

1N+

C861

22P

D601

1N4148

C818
22uF

50V

IC802

MC4580

330P

330P

10K

HP_MUTE

R874

1K

Q804

KRC231

R862

10K

C682
47uF

25V

OUT

IN-

IN+

VSS

R867

68K

C850

47P

C863

22P

C864

22P

C856

C855

R871

10K

C844
104P

R872

10K

R877

R865

6K8

C852

4.7uF

R870

15K

0R

1

2

3

4

Q803
C8050

HP_L_P

C854

100P

R1C1
100R

R861

8R2

R860

2R2

220uF

C846

16V

R864

6K8

C853

4.7uF

R869

15K

HP_L_M

R863

6K8

C847

47P(100P)

SIP1

4P/2.0MM

2

3

4

1

HP_SENSE
HP_R
GND
HP_L

PWM/DSP_CLK

PWM/DSP_DAT

PWM_RST

ADC_BCK

DALRCK

DADATA_0

DADATA_1

DADATA_2

DADATA_3

PWM_MUTE

BQ_RST
BQ_STB

REC_R

REC_L

SPBANA

+3.3VD

+5.6V

FB2500

C646

104P

R160

0R

$$$28504

FB608

FB2K7

C636

104P

FB609
FB2K7

R653 100R

R654 100R

R656 100R

R657 100R

R660 100R

R687

NC

R686

NC

FB607

C611

R161

NC

104P

R685
100R

C613

103

R678
NC

C645
10uF

16V

R639
220K

C647

1000uF

10V

C643

104P

R659 100R

R658 100R

C690

0.1uF
50V

C644

C641

C642

C640

R655 100R

10uF
C639

104P

104P

104P

D602

1SS355

5V1

ZD602

16V
104P

D603

R667
120R

R666

1M

X601

R671
100R

R670
100R

103P

104P

C650

104P

R674 10K

R675 10K

R676 10K

C656

92

93

94

DVSS92

DVDD91

IO_VDD94

DMIX_MCLK

R677 10K

88

89

90

91

DMIX_BCK

DMIX_LRCK

DMIX_SDOUT

IC604

PS9831

R665

1K

100

IO_VSS1

1

TEST_MODE3

PLL_DVSS

2

PLL_DVDD

3

IO_VDD4

4

IO_VSS5

5

PLL_AVDD

6

IO_VSS7

7

PLL_AVSS

8

IO_VSS9

9

IO_VDD10

10

MBCK

11

MLPCK

12

DVDD13

13

DVSS14

14

MSDIN0

15

MSDIN1

16

MSDIN2

17

MSDIN3

18

SBCK

19

SLPCK

20

IO_VSS21

21

IO_VDD22

22

SSDIN0

23

SSDIN1

24

SSDIN2

25

SSDING27BXT_MUTE28IO_VSS2829IO_VDD2930MIC_MCLK31MIC_BCK32MIC_LRCK33MIC_SDIN34DVDD3435DVSS3536PWM_SWL_M37PWM_SWL_P38IO_VSS3839IO_VDD3940PWM_HP_R_M41PWM_HP_R_P42DVDD4243DVSS4344IO_VSS4445PWM_HP_L_M46PWM_HP_L_P47IO_VDD4748PWM1_M49PWM1_P50IO_VSS50

C649

95

96

97

99

/RESET

SCAN_BNA

IO_VSS95

TEST_MODE198TEST_MODE2

12.288MHz

84

85

86

87

CLK_IN

SPI/IC2

IO_VSS85

IO_VDD87

26

104P

C654

TP615

TP616

C631

104P

TP617

TP618

TP619

TP620

104P

C653

HP_R_P

HP_R_M

C651

2U2

C603

2U2

C604

104P

+12VA

1SS355

R638
NC

C601

2U2

R640

22K

R641
100R

R642

1M

Q601

C9014

C602

2U2

R644
220K

R643
100K

R645
220K

C605

330P

C673

83

/CS/I2C_AD2

C678
22P

22P

SI/I2C_ADD

81

82

DVSS81

HP_L_P

HP_L_M

R646 10K

R647 10K

104P

C663

80

DVDD80

104P

C660

BUS-DAC

C606

330P

+5V_UCOM

R669

10K

R672

10K

C625

220uF

C670

C655

C619

C657

R680
10K

104P

104P

104P

104P

+5VM

R662

120P

C607

16V

GND

C665

470uF

22K

10V

1SS355

D604

1SS355

R668
100K

D605

R664

TP630

TP629

TP628

TP627

TP626

TP625

1K

PWM_FL+

PWM_FL-

PWM_FR+

PWM_FR-

PWM_SW+

PWM_SW-

R561
220K

1 V DDA

2VSSA

3OUT

4STROBE 5

IC601

XX(MSGEQ7N(FO))

104P

TP612

R689
100K

LG-MDT355/MDD265/MDD65/MDD105

MAIN BOARD D/AC

C608

33P

8CKIN

R688 1K

7RESET

C609

6

GND

IN

C610

102P

R673

1K2

C664

104P

76OVBPLOAD

77

78

79

SO_SDA

SCK_SCL

BPD_BNA

PWM8_P

75

PWM8_M

74

IO_VSS73

73

IO_VDD72

72

PWM7_P

71

PWM7_M

70

IO_VSS69

69

PWM6_P

68

PWM6_M

67

DVDD66

66

IO_VDD65

65

IO_VSS64

64

DVSS63

63

PWM5_P

62

PWM5_M

61

IO_VSS60

60

PWM4_P

59

PWM4_M

58

IO_VSS57

57

IO_VDD56

56

PWM3_P

55

PWM3_M

54

IO_VSS53

53

PWM2_P

52

PWM2_M

51

R652 10K

R648

R649

10K

10K

12

11

C600

220uF

16V

+5.6VA

+5.6V

HP_SENSE

D600

1N4148

R876

10R

Q802

C8550

10

R873

1K

9

Q805

KRC231

R857

8

R859

+12VA -12VA

2R2

C848

16V

220uF

8R2

R858

7

R856

6K8

C849

47P(100P)

6

BUS-DAC

C875

HP_R_M

100P

HP_R_P

R855

6K8

C859

4.7uF

C862

22P

C858

330P

C857

330P

R853

15K

5

R854

6K8

C860

4.7uF

4

3

R852

15K

2

1

A

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

3-33 3-34

6. MAIN - AMP CIRCUIT DIAGRAM

12

11

10

9

8

7

MDT355 IC700 (TAS5342A) IC701(TAS5342A)

MDD265 IC700 (TAS5352A) IC700(NC) WOOFER PART NC

MDD105 IC700 (TAS5342LA) IC700(NC) WOOFER PART NC

C703 470uF/35V

L707,L708,L709,L710 15uH/4A

MDD65 IC700 (TAS5342LA) IC700(NC) WOOFER PART NC

C703 470uF/35V

L707,L708,L709,L710 15uH/4A

R700

3R3(2)

C708

103P(2)

C704

104P(2)

R701

C703

1000uF

50V

10R(3)

C705

104P(2)

44GVDD_A

R705

3R3(2)

C713

C711
224(2)

C714

-+

C712

330P(2)

333(2)

C710

43EST_A

L708

10UH

12

C7G2

C7G1
103(2)

103(2)

104(2)

R710

R706

2R2(2)

2R2(2)

224(2)

684S(2)

C795

R707

18R(2)

18R(2)

C715

224P(2)

39OUT_A

40PVDD_A

41PVDD_A

42NC

34

C718

C719

R711

38GND_A

L706

22UH

C717

224P(2)

37GND_B

R713

3R3(2)

104(2)

C720

224(2)

224(2)

L709

10UH

C721

330P(2)

36OUT_B

35PVDD_B

-+

333(2)

C722

34EST_B

R716

3R3(2)

C728

C726
224(2)

C729

-+

L710

10UH

C727

330P(2)

333(2)

C723

33EST_C

4

12

C7G3
103(2)

104(2)

R717

2R2(2)

224(2)

C794

R718

18R(2)

C730

224P(2)

30GND_C

31OUT_C

32PVDD_C

C7G4
103(2)

R720

2R2(2)

684S(2)

R721

18R(2)

C732

224P(2)

28OUT_D

29GND_D

C733

C734

3

L705

22UH

C736

330P(2)

27PVDD_D

R722

3R3(2)

104(2)

C735
224(2)

224(2)

L707

10UH

26PVDD_D

25NC

-+

333(2)

C737

FL-

FL+

12345

R726

10R(3)

C739

104P(2)

32C_DDVG22GVDD_D

24EST_D

FR-

FR+

SW+

SW-

6

34

L714
22UH

C746

104P(2)

C745

1000uF

50V

C750

12

C7G5

R733

3R3(2)

C754

C752
224(2)

C755

-+

L716

10UH

C753

330P(2)

R728

3R3(2)

103P(2)

R729

10R(3)

333(2)

C747

C751

104P(2)

43EST_A

44GVDD_A

C7G6
103(2)

C749

R738

2R2(2)

C760

684S(2)

R739

18R(2)

224P(2)

C758

R741

3R3(2)

104(2)

C761
224(2)

224(2)

L715

10UH

C762

330P(2)

-+

103(2)

104(2)

R734

2R2(2)

224(2)

C845

R735

18R(2)

C756

224P(2)

333(2)

C763

34EST_B

35PVDD_B

36OUT_B

37GND_B

38GND_A

39OUT_A

40PVDD_A

41PVDD_A

42NC

2.1 CH_SUBWOOFER OPTION

224(2)

C767

R743

10K(2)

C769

-+

L711

10UH

C766

R744

330P(2)

18R(2)

C768

224P(2)

333(2)

C764

30GND_C

31OUT_C

32PVDD_C

33EST_C

684S(2)

R747

18R(2)

C770

224P(2)

28OUT_D

29GND_D

C771

10K(2)

R748

27PVDD_D

224(2)

L712

10UH

C772

330P(2)

26PVDD_D

-+

333(2)

C775

C773

104P(2)

32C_DDVG22GVDD_D

24EST_D

25NC

R752

10R(3)

JK701

6

IC700

TA53X2/XX

1GVDD_B

2OTW

3NC

4NC

5SD

6PWM_A

7 RESET_AB

8PWM_B

9OC_ADJ

10 GND

11 AGND

12 VREG

13 M3

14 M2

15 M1

16 PWM_C

17 RESET_CD

18 PWM_D

19 NC

20 NC

5

4

3

C793

104P

C680
47uF

35V

C784

104P

104P(2)

R702

10R(3)

-+

FB1104

C706

FBS2545

ZD202

12V

R798 100R

R703 100R

R704 100R

R708 100R

R709 100R

R712 22K

104P

C724

R719 100R

R723 100R

21 VDD

C740

104P(2)

R727

10R(3)

C738

104P(2)

C725
10uF

50V

R724 1R(3)

R750
1K(2)

R787 1R(3)

C748

104P(2)

R730

10R(3)

1GVDD_B

2OTW

3NC

4NC

5SD

6PWM_A

R799 100R

R731 100R

R732 100R

2

C780

104P(2)

GND

1

+36VP

+12VA

OTW

Q701

AMP_SD

AMP_RST

R754

1K(2)

8550

100K(2)

R755

Q702

KRC103S

R135

100R

R736 100R

7 RESET_AB

R737 100R

IC701

TA53X2/XX

8PWM_B

9OC_ADJ

10 GND

R740 22K

R756 10K(2)

11 AGND

12 VREG

13 M3

14 M2

15 M1

16 PWM_C

17 RESET_CD

18 PWM_D

19 NC

20 NC

21 VDD

C776

104P(2)

104P

C765

R746 100R

R749 100R

R753

10R(3)

C774

104P(2)

PWM_SW-

PWM_SW+

PWM_FR­PWM_FR+

PWM_FL­PWM_FL+

AMP_PROTECT

+5.6V

LG-MDT355/MDD265/MDD65/MDD105

MAIN BOARD AMP

A

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

3-35 3-36

7. AUDIO DECK SYSTEM CIRCUIT DIAGRAM

12

11

10

DECK MECHANISM SIDE

MOTOR

9

REC SW-F

B-HALF SW

U202

BA3126N

GND6VCC

8

RP/B_HD_RCH

7

+LCH

-LCH

+RCH

-RCH

RP/B_HD_LCH

E.HD
E.HD

6

ERASE_HEAD

CN3

6P/2.0MM

TO DECK

C39

222P

C251
222P

GND

1
2
3
4
5
6

GND

5

4

R240

R253
6K2

6K2

C258

C257

270P

270P

3

C236
122M

GND

2

123

CONT

4

5

789

R28

C295

R205

4.7uF/50V

10K

R242
7K5

R251
7K5

C248

C243

1000P

1000P

L17

2A621

100R

C19

C230

103

100/16

CHGND

C244

R243

10uF/25V

2K2

R249
2K2

C294

10uF/25V

R244

0R

R277

C222

15K

472(M)

C249

100/16

C38

10uF/25V

R204

C5

100K

472M

C272

10uF/25V

R31

C1

100K

472M

R211
100

Q14
8550/AI

R265

100K

Q15

1K

R138

9014

Q201
STD1862LPF

C247

C210
102P

153P

R271

10

Q202

C241

9014

10/50

123

FB201
FB600

FB251
FB600

C227

C229

100/16

104

R29
100

R133

1K

GND

R252
1K

U201

KIA6225

GND

VCC

4

5

C36

390P

C37

47/16

R216

R215

120K

120K

C208

103

R208

8K2

123

R250

100

R256

27K

R254

1K5

C252
47/16

678

C235

103

GND5ALC6VCC

4

R276
220K

R217
8K2

U203

BA3308

ALC

C298
10/35

GND

9

C299

R219

10uF/25V

1K

R32

1K

C231
390P

R218
100

C233
47/16

789

R255

27K

C150
100/16

10uF/25V

R41

1K

R40

47K

C211

R42

1K

R225

47K

C288

100U/16

GND

C271

100U/16

C254

10uF/25V

C255

1000P

C33

10uF/25V

C32
1000P

R257
1K5

C296
47/16

FB203
FB600

C259
392

FB253
FB600

C40

392

Q204

9014C

R45

1K

Q203
9014C

Q280
8050/AI

R38

3K

C44

0.47uF

GND

R280

2R2 1/4W

D290

R281
560R

C151

104p

9.1V

ZD280

GNDGND GND

PB_MUTE

270P

C263

R263

C213
270P

R213

47K

R35

3K

C52

0.47uF

GND

FB254
FB2K7

47K

FB204
FB2K7

Q2

9015C

R46
1K

Q1

9015C

REC_BIAS

TA+12V

TAPE-L

TAPE-R

REC_L

REC_R

REC_MUTE

1N4148

VCC 12V

REC SW-F

B-HALF SW

GND(M/T.SW)

678

9

Q293

A1273Y

C293

223

Q292

9014C

R297
150

REC SW-R

B-MODE SW

B-SOL

REC SW-R

GND(SOL)

B-SOL

B-PHOTO OUT

B-MODE SW

CN1

9P/FC

12345

8K2

R24

8K2

R36

8K2

R15

R14

8K2

R37

39K

R34

56K

R25

18K

M+

SOL.+

Q291

C292

R295

3K3

22U/16V

10K

A1273Y

C291

R292

223

47K

R293

1K

Q290
9014C

R296

+5V_UCOM

R39

R33

3K3

47K

LBAF-B

HALL_B

B-SOL

MOTOR

R290
10uH

R291

R401

3K3

220K

GND

R294

C290

10K

4U7

+12VA

1

LG-MDT355/MDD265/MDD65/MDD105

AUTO DECK SYSTEM

A

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

3-37 3-38

8. MIC / USB / KEY / VFD CIRCUIT DIAGRAM

12

1F-

2F-

3NP

4NP

5NX

C905

C904

104

6NX

F-

11

R905

47U/16V

100K

GND

10

SW937

0

SW936

SW935

SW934

SW933

6

SW932

5

SW931

SW930

3

SW929

2

SW928

9

R963
39K

8

7

4

1

R962
18K

R961

8K2

R960
5K6

R959
3K3

R958
3K3

R957
2K2

R956

1K8

P18

P19

P20

GR01

GR02

GR03

GR04

GR05

GR06

GR07

GR08

GR09

GR10

GR11

GR12

GR13

GR14

GR15

9

8

7

6

5

4

SW927

ECHO VOL-

SW926

3

2

1

ECHO VOL+

SW925

MIC VOL-

SW924

MIC VOL+

KEY2 PCB

R955

1K2

R954
1K2

R953

1K

R952
1K2

R916
R917

R964
47K

3

KEY3

2

KEY2

1

DGND

TO MAIN PCB MICOM

VFD901

LG_MCT355_VFD-A

VFD

7NX

8NX

9NX

10 NX

11 P20

12 P19

13 P18

14 P17

P17

P18

P19

P20

VFD

MARK

27

SG18

28

SG19

29

SG20

30

SG21

31

SG22

32

SG23

33

SG24

34

GR1

35

GR2

36

GR3

37

GR4

38

GR5

39

GR6

10K

10K

C916

473

CN906

HNA-15MM40T

15 P16

16 P15

17 P14

18 P13

19 P12

20 P11

21 P10

22 P9

23 P8

P08

P09

P10

P11

P12

P13

P14

P15

P16

P13

P14

P15

P16

P17

22

23

24

25

26

SG17

SG14/KS14

SG15/KS15

SG16/KS16

PT6324(QFP52)/ET8862

GR741GR842GR943GR1044GR11

40

VR901

B

A

2

1

3

C917

473

GND

24 P7

25 P6

26 P5

27 P4

28 P3

29 P2

30 P1

31 15G

32 14G

GR14

GR15

P01

P02

P03

P04

P05

P06

P07

P09

P10

P11

P12

18

19

20

21

SG9/KS9

SG11/KS11

SG10/KS10

SG12/KS12

SG13/KS13

U901

GR12

GR1347GR14

GR1549GR1650VEE51VDD52GND

45

46

48

C913

104

IN4001

D902

F-

F+

100M 70R

FB907 0R

FB906 0R

FB918

123456789

F-

F+

CON901

33 13G

34 12G

35 11G

GR11

GR12

GR13

P07

P08

16

17

SG8/KS8

C914

47U/50V

100M 70R

FB908

-VKK
VFD-STB

36 10G

37 9G

38 8G

GR08

GR09

GR10

P06

15

SG6/KS6

SG7/KS7

104

C915

100M 600R

100M 600R

FB911

FB910

VFD-DATA

39 7G

40 6G

41 5G

GR05

GR06

GR07

P05

14

SG5/KS5

SG4/KS4

SG3KS3

SG2/KS2

SG1/KS1

VDD

GND

OSC

DOUT

STB

DIN

CLK

GND

100M 600R

FB912

GND

VFD-CLK

VFD BOARD

42 4G

43 3G

44 2G

45 1G

46 NP

47 NP

48 F+

49 F+

15R

15R

R903

R904
100K

GND

GR01

GR02

GR03

GR04

P01

P02

P03

P04

13

12

11

10

9

8

R909

7

R910

6

K2

R911

5

K1

4

R912

3

R913

2

1K

R914

1

C911

100P

GND

C912

104

100K

R915

IN4001

D901

100M 600R

100M 600R

100M 600R

100M 600R

100M 600R

FB913

FB914

FB915

FB916

FB919

10111213141516171819202122

+5V6

KEY1

VOL-B

VOL+A

REMOTE-INT

15R

R901

R902

82K

100K

100K

1K

1K

GND

100M 70R

100M 600R

FB909

FB920

KEY3

+12VA

100P

C926

DGND

104

C903

GND

GND

R906

100R

100P

DGND

47U/16V

C902

F+

C925

VOL_LED7

104

C901

104

C909

VOL_LED6

VOL_LED5

P901

FM-6038TM2-5A

V+

3

47U/16V

104

C907

C906

FB901 10uH

47U/16V

C910

VOL_LED3

VOL_LED4

VOL_LED2

IP2V-

1

47P

C908

23

VOL_LED8

VOL_LED1

R900
39K

330K

R907

TO MAIN PCB MICOM

100R

R908

KEY1 PCB

R942

18K

R941

8K2

R940

5K6

R939

3K3

R924

3K3

R923

2K2

R922

1K8

R921

1K2

OPEN/CLOSE

R920

1K2

R919

1K

R918

1K2

SW919

CD SYNC

SW918

CLOCK

SW917

TIMER

SW916

DISCSKIP

1

CN903

KEY1-1

KEY1-1

CON903

1

SW908

SW907

TUNNG+

SW906

STOP

SW905

PRESET+

SW904

SW903

AUX

SW902

TAPE

SW901

TUNER

R

DGND

2

DGND

DGND
2

R932

R935

R936

R933

R934

R937

R938

R931

10K

10K

10K

10K

10K

10K

10K

10K

Q901
9014

R946

R944

R943

R930

2K2

R929

1K8

R928

1K2

R927

1K2

R926

R925

1K2

8K2

R945

5K6

3K3

3K3

1K

KEY3 PCB

SW920

EQ

SW921

LG EQ

SW922

USER EQ

SW923

XDSS/MP3 OPT.

1

2

CN902

DGND

KEY3-1

DGND

KEY3-1

CON902

2

1

SW909

AUTO DJ

SW910

TUNNG-

SW911

SET/CD PAUSE

SW912

PRESET-

SW913

POWER

SW914

USB/DEMO

SW915

DVD

DGND

Q902
9014

JK901

HP JACK(3.5mm TC38-103-01)

JK903
MIC1

JK904
MIC2

LED BOARD

CON1001

+12VA

VOL_LED7

VOL_LED6

VOL_LED5

VOL_LED4

VOL_LED3

VOL_LED2

VOL_LED1

VOL_LED8

Q903
9014

Q904
9014

HEADPHONE

6

5

4

2

3

7

8

9

1

6

5

4

2

3

7

8

9

1

1

2

3

4

5

6

7

8

9

C924

6

FB922

103

C928

GND

103

C927

100M 70R

FB904 3.3uH

FB903

3.3uH

GND

FB902

100M 70R

5

7

2

3

4

1

TO MAIN PCB PWM

CN904

HP-SENS

1

HP-L

2

AGND

3

4

HP-R

JK902

USB SOCKET

V+

D-

D+

V-

USB/PHONE BOARD

6
4
3
2
1
5

MIC BOARD

R950 22K

C922

56K

D916
BLUE

R973

Q905
9014

C920

104

C921
104

GND

R974

56K

C923

682

R923A
471/0805

D915
BLUE

682

Q906

9014

R951
22K

R976
100K

GND

R975
100K

GND

R926A

471/0805

D914
BLUE

100K

Q907
9014

R977
10K

R5

GND

R927A
471/0805

104P

C2
NC

D913
BLUE

C3

GND

Q908
9014

S4308

1NF

2GND

3INPUT 4

BAN57059401

R928A

471/0805

D912
BLUE

104

15K

R948

15K

R949

FB223

104

C918

0R

FB905

0R

C919

220U/10V

CN901

1

USB_GND2

2

USB_VCC

3

D-

4

D+

5

USB_GND

TO MAIN PCB ESS

TO MAIN PCB ESS

100K

C6
100uF
16V

R6

1K

R2

C1

C4

GND

CON906

+12VA

VOL_LED7

VOL_LED6

VOL_LED5

VOL_LED4

VOL_LED3

VOL_LED2

VOL_LED1

VOL_LED8

1

2

3

4

47K

NC

R7

1M

R939A
471/0805

CN905

MIC_SENS

MIC OUT

GND

+12VA

R4

220R

GND

R940A

471/0805

D917
BLUE

R3

C7

22uF

16V

GND

MIC_SENS

MIC_OUT

GND

+12VA

L1

FB2500

6VCC

5ALC

C8

104P

GND

R929A

471/0805

D910
BLUE

R1
220R

100uF

16V

C5

R938A
471/0805

1uF
50V

GND

D918
BLUE

1

2

3

4

5

6

7

8

9

IC1

OUTPUT

TO LED BOARD

LG-MDT355

DGND

MIC/USB/KEY1/2/3/VFD

A

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

3-39 3-40

CIRCUIT VOLTAGE CHART

PIN NO.

IC1_ESS8390

1 3.28

14 3.28

16 1.45

30 3.28

36 3.28

38 1.45

52 3.28

66 3.28

68 1.45

81 3.28

87 3.28

89 3.28

99 3.28

104 1.45

108 3.28

115 3.28

133 3.28

153 3.28

155 1.45

156 3.28

158 1.45

163 3.28

IC100_ LC87F5NC8A

1 0.13

2 2.42

3 3.91

4 4.17

5NC

6 2.57

7 2.81

8 4.82

9 2.27

10 2.56

11 GND

12 2.39

13 2.42

14 4.85

15 4.85

16 4.85

17 4.85

18 NC

19 0.23

20 NC

TEST

VOLTAGE(V)

PIN NO.

22 NC

23 2.24

24 0.09

25 3.26

26 3.39

27 4.32

28 4.73

29 4.85

30 4.85

31 4.85

32 4.85

33 NC

34 4.85

35 NC

36 NC

37 NC

38 NC

39 GND

40 4.85

41 4.83

42 4.83

43 NC

44 NC

45 4.76

46 NC

47 4.76

48 4.65

49 NC

50 4.08

51 4.03

52 NC

53 5.13

54 3.15

55 4.85

56 GND

57 4.85

58 3.94

59 NC

60 NC

61 4.75

62 NC

63 NC

64 NC

65 NC

VOLTAGE(V)

TEST

PIN NO.

67 4.74

68 4.74

69 4.74

70 4.74

71 4.74

72 4.74

73 4.74

74 NC

75 4.75

76 4.83

77 NC

78 4.85

79 4.85

80 NC

81 NC

82 NC

83 NC

84 NC

85 NC

86 4.83

87 4.81

88 GND

89 4.85

90 0.13

91 0.15

92 0.15

93 4.85

94 4.85

95 NC

96 NC

97 NC

98 2.31

99 2.42

100 0.05

IC103_T24C16A

1 GND

2 GND

3 GND

4 GND

5 4.9

6 4.9

7 GND

8 4.9

IC200_YD4052

VOLTAGE(V)

TEST

PIN NO.

2 0.01

3 0.65

40

5 0.39

60

70

8 GND

90

10 4.88

11 0

12 1.65

13 0.55

14 0.89

15 0

16 5.9

IC201_WM8738

1 3.3

2 1.66

3 1.64

4 3.18

5 2.16

6 2.14

7 2.15

8 2.15

9 4.3

10 AGND

11 DGND

12 1.63

13 1.37

14 AGND

IC401_IP9011

1 2.13

2 2.11

3 1.92

4 2.33

5 5.05

6 1.66

7 1.69

8 3.27

9 0.86

10 3.27

11 3.27

12 5.05

13 3.45

TEST

VOLTAGE(V)

PIN NO.

15 1.61

16 2.78

17 2.03

18 2.21

19 5.05

20 1.65

21 1.75

22 GND

23 1.66

24 0.92

25 3.26

26 3.21

27 3.36

28 3.46

29 GND

30 GND

IC501 LM1117-1V5

1 GND

2 1.48

3 3.28

IC502 IC M12L128168A-6T

1 3.28

3 3.28

9 3.28

14 3.28

27 3.28

43 3.28

49 3.28

IC503 W25Q16

8 3.29

IC504 FT24C021CS

8 3.29

IC604_PS9831

1 GND

2 PLL GND

3 1.92

4 3.21

5 GND

6 1.92

7 GND

8 PLL GND

9 GND

10 3.21

11 GND

TEST

VOLTAGE(V)

PIN NO.

13 1.92

14 GND

15 GND

16 GND

17 GND

18 GND

19 1.58

20 1.58

21 GND

22 3.21

23 1.29

24 NC

25 NC

26 1.59

27 0.38

28 GND

29 3.21

30 NC

31 NC

32 NC

33 NC

34 1.92

35 GND

36 NC

37 NC

38 GND

39 3.21

40 1.58

41 1.58

42 1.92

43 GND

44 GND

45 1.58

46 1.58

47 3.21

48 1.58

49 1.58

50 GND

51 1.58

52 1.58

53 GND

54 NC

55 NC

56 3.21

VOLTAGE(V)

TEST

PIN NO.

58 NC

59 NC

60 GND

61 NC

62 NC

63 GND

64 GND

65 3.21

66 1.92

67 1.58

68 1.58

69 GND

70 1.59

71 1.59

72 3.21

73 GND

74 1.59

75 1.59

76 3.14

77 NC

78 4.83

79 4.83

80 1.92

81 GND

82 GND

83 GND

84 GND

85 GND

86 1.61

87 1.65

88 1.57

89 1.59

90 1.17

91 1.92

92 GND

93 1.47

94 3.21

95 GND

96 4.85

97 GND

98 GND

99 GND

100 GND

IC700_TAS5342A

VOLTAGE(V)

TEST

PIN NO.

2 3.15

3NC

4NC

5 3.15

6 1.58

7 4.85

8 1.58

9 1.07

10 GND

11 GND

12 3.21

13 GND

14 GND

15 GND

16 1.58

17 4.85

18 1.58

19 NC

20 NC

21 12.04

22 11.95

23 11.06

24 28.4

25 NC

26 34.9

27 34.9

28 28.4

29 GND

30 GND

31 17.3

32 34.9

33 28.3

34 28.3

35 34.9

36 17.3

37 GND

38 GND

39 17.3

40 34.9

41 34.9

42 NC

43 11.9

44 11.4

IC701_TAS5342A

TEST

VOLTAGE(V)

3-41 3-42

MEMO

PIN NO.

2 3.15

3NC

4NC

5 3.15

6 1.58

7 4.85

8 1.58

9 1.12

10 GND

11 GND

12 3.21

13 GND

14 GND

15 GND

16 1.58

17 4.85

18 1.58

19 NC

20 NC

21 12.04

22 11.95

23 11.06

24 28.4

25 NC

26 34.9

27 34.9

28 28.4

29 GND

30 GND

31 17.3

32 34.9

33 28.3

34 28.3

IC801_D4558

1 0.01

2 0.01

3 0.01

4 -12.3

5 0.01

6 0.01

7 0.01

8 11.79

U202_BA3126

10

TEST

VOLTAGE(V)

PIN NO.

3 0.01

4 0.38

5 GND

6 6.51

7 0.01

8 GND

9 0.01

U203_BA3308

1 1.58

2 6.30mV

3 1.56

4 GND

5 3.25

6 7.12

7 1.56

8 6.30mV

9 1.58

U901_PT6324

1 4.77

2 4.14

3 4.37

4 1.14

50

60

7 2.81

8 GND

9 4.91

10 -17.7

11 -21.3

12 -23

13 -23

14 17.6

15 -21.9

16 -21.6

17 -24.7

18 -23

19 -24.7

20 -19.5

21 -23

22 -23

23 -24.7

24 -26.7

25 -26.7

26 -17.6

TEST

VOLTAGE(V)

PIN NO.

28 NC

29 NC

30 NC

31 NC

32 NC

33 -25.1

34 -25.1

35 -25.1

36 -25.1

37 -25.1

38 -25.1

39 -25.1

40 -25.1

41 -25.1

42 -25.1

43 -25.1

44 -25.1

45 -25.1

46 -25.1

47 -25.1

48 -25.1

49 NC

50 -26.9

51 4.9

52 GND

VOLTAGE(V)

TEST

3-43 3-44

PRINTED CIRCUIT BOARD DIAGRAMS

1. MAIN P.C.BOARD

(TOP VIEW)

3-45 3-46

MAIN P.C.BOARD

(BOTTOM VIEW)

3-47 3-48

2. SMPS P.C.BOARD

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

3-49 3-50

3. FRONT P.C.BOARD

3-51 3-52