LG LM-K3960A Service manual

3CD CHANGER
KARAOKE SYSTEM

SERVICE MANUAL

MODEL: LM-K3960A, LMS-K3960V

SERVICE MANUAL MODEL: LM-K3960A, LMS-K3960V

CAUTION

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

- 1-1 -

[CONTENTS]

❍ SECTION 1. GENERAL

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

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

• SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-5

❍ SECTION 2. ELECTRICAL SECTION

• ELECTRICAL TROUBLESHOOTING GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

• INTERNAL BLOCK DIAGRAM of ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

• BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

• SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

• WIRING DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35

• PRINTED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37

❍ SECTION 3. DVD PART ELECTRICAL

• DVD ELECTRICAL TROUBLESHOOTIHG GUIDE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1

• DVD SCHEMATIC DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-15

• DVD PRINTED CIRCUIT DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-23

❍ SECTION 4. EXPLODED VIEWS

• CABINET AND MAIN FRAME SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1

• TAPE DECK MECHANISM (A/R & A/S : RIGHT A/R DECK) . . . . . . . . . . . . . . . . . . . . . . . . . .4-3

• TAPE DECK MECHANISM (A/R & A/S : LEFT A/S DECK) . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5

• CD MECHANISM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

❍ SECTION 5. SPEAKER PART

• SPEAKER PART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1

❍ SECTION 6. REPLACEMENT PARTS LIST

• REPLACEMENT PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1

- 1-2 -

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.

Storage in conductive bag

Drop impact

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

Magnet

How to hold the pick-up

Conductive Sheet

Cotton swab

Pressure

Pressure

- 1-3 -

■ NOTES REGARDING COMPACT DISC PLAYER REPAIRS

1. Preparations

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

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

2. Notes for repair

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

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

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

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

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

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

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

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.

Resistor
(1 Mohm)

Conductive
Sheet

Resistor
(1 Mohm)

Armband

RESET jump wire

VOLUME

VOLUME KNOB

DOWN

UP

- 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 sur-

face 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 -

❏ SPECIFICATIONS

General

Power supply Refer to the main label.
Power consumption 70 W (LM-K3960Q/LM-KW3960Q/LM-K3860Q model)

50 W (LM-K3565Q model)
30 W (LM-K3365Q model)

Net Weight 6.5 kg
External dimensions (W x H x D) 272 X 322 X 354 mm

Tuner/Amplifier

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

Intermediate Frequency 10.7 MHz
Signal to Noise Ratio 60/55 dB (Mono/Stereo)
Frequency Response 140 - 10000 Hz

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

Intermediate Frequency 450 kHz
Signal to Noise Ratio 30 dB

Frequency Response 140 - 1800 Hz

Output Power LM-K3960Q/LM-KW3960Q model - 130 W + 130 W (4 , THD 10 %)

LM-K3860Q model - 100 W + 100 W (4 Ω , THD 10 %)
LM-K3565Q model - 50 W + 50 W (4 Ω , THD 10 %)

LM-K3365Q model - 30 W + 30 W (4 Ω , THD 10 %)
T.H.D 0.5 %
Frequency Response 140 - 20000 Hz
Signal-to-noise ratio 75 dB

DVD/VCD/CD player

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

(C) 0.3 V (p-p), 75 Ω
Component Video output (Y) 1.0 V (p-p), 75 Ω

(Pb)/(Pr) 0.7 V (p-p), 75 Ω

Speakers

Speaker Name Front Speaker (L/R)
Type Bass Reflex 2Way 3Speaker (LMS-K3960V/LMS-KW3960V/LMS-K3860V)

Bass Reflex 2Way 2Speaker (LMS-K3565V/LMS-K3365V)
Impedance 4
Frequency Response 55 - 20000 Hz
Sound Pressure Level 86 dB/W (1m)
Rated Input Power 130 W (LMS-K3960V/LMS-KW3960V)

100 W (LMS-K3860V)

50 W (LMS-K3565V)

30 W (LMS-K3365V)
Max. Input Power 260 W (LMS-K3960V/LMS-KW3960V)

200 W (LMS-K3860V)

100 W (LMS-K3565V)

60 W (LMS-K3365V)
Net Dimensions (W x H x D) 214 X 386 X 318 mm (LMS-K3960V/LMS-KW3960V/LMS-K3860V)

229 X 224 X 286 mm (LMS-K3565V/LMS-K3365V)
Net Weight 6.3 kg (LMS-K3960V/LMS-KW3960V/LMS-K3860V)

4.2 kg (LMS-K3565V)

3.8 kg (LMS-K3365V)

Cassette tape player

Tape Speed 3000 ± 3 % (MTT-111.

NORMAL-SPEED)

Wow Flutter 0.25 %

(TT -111, JIS-WTD)
F.F/REW. Time 120 sec (C-60)
Frequency Response 250 - 8000 Hz
Signal to Noise Ratio 43 dB
Channel Separation 50 dB (P/B)/45 dB (R/P)
Erase Ratio 55 dB (MTT-5511)

Ω

Ω

- 1-6 -

- 2-1 -

SECTION 2. ELECTRICAL SECTION

❏ ELECTRICAL TROUBLESHOOTING GUIDE

P7904 6PIN P-SENS check

Refer to SMPS

Troubleshooting

Check if IC101 KIA7042
input is over 5V

Check if IC101 KIA7042

input is over 4.3V

IC101 KIA7042
relevant parts check

relevant parts

replacement

normal

IC101 KIA7042?

IC100 78KO/KF2 1 PIN
Power Check

normal

YES

NO

NO

NO NO

YES

YES

YES

YES

■ MICOM PART CHECK I

- 2-2 -

Q102 BASE PIN

0.6V HIGH check

Q102 COLLECTOR

0.6V LOW check

Check if IC101

KIA7042 output

power is over 4.3V

relevant parts check

relevant parts

replacement

normal

relevant parts

replacement

relevant parts check

normal

IC 103 8PIN IC 100 19,20,59
PIN 5V check

X101:32.768KHz
X100:9.8304MHz operation
status check

normal

P7904 5PIN 5.6V check

Refer to SMPS

Troubleshooting

Output 5V operation check
D101 1SR35

relevant parts check

normal

relevant parts

replacement

D101 1SR35 both terminal
power check

Q101 EMITTER 5V check
and COLLECTO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

■ MICOM PART CHECK II

- 2-3 -

IC100 78KOKF2 22,24

PIN Check

22 PIN DATA MICOM power 5V check

Refer to MICOM

Troubleshooting

relevant parts

replacement

relevant parts check

normal

Refer to SMPS

Troubleshooting

P7302 assembly check

Each PIN power check

normal

relevant parts

replacement

normal

P7904 1,2,3 power check

F1+, F2 both terminal: 3.7V and
above VKK: power is over 26V

P7302 connection status
check and power check
F+,F2- both termainal: 3.7V
or above VKK:26V or above
power check

IC301 PT6324 Power check
50 PIN VKK:-26V 9.52
PIN +5V

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

■ IC103 KS4CD21CS CHECK

■ FLD DISPLAY CHECK

- 2-4 -

IC100 ➞ IC301 DATA
Communication check
PIN PIN
75 PIN ➞ 3PIN STB
76 PIN ➞ 2PIN DO
77 PIN ➞ 4PIN DI
78 PIN ➞ 1PIN CLK

If 5V defective D3191SR35
input and output power check

relevant parts check

76 PIN ➞ DATA input check

relevant parts check

relevant parts

replacement

normal

relevant parts

replacement

normal

FLT light on

normal

IC100
75 PIN ➞ STB
77 PIN ➞ 4PIN DI
78 PIN ➞ 1PIN CLK
Data output check

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

- 2-5 -

P7905 9PIN 3.3V check

X601 12.288MHz operation
check

IC604 PS9829
86 PIN CLK input check

IC100 78KOKF2
21 ➞ PWM_CLK
22 ➞ PWM_DATA
23 ➞ PWM_REST
output check

IC604 PS9829 DATA input
check
78 PIN ➞ DATA
79 PIN ➞ CLK
96 PIN ➞ REST

PWM MODULATOR output
check
FL:75(+)74(-)FR:71(+)70(-)
SW:68(+)67(-)CEN:62(+)61
(-) SL:59(+)58(-)SR:52(+)51(-)

normal

IC604 PS9829 VDD PIN
Power check
(3.10.22.29.39.47.56.65.72.

87. 94)

Refer to SMPS

Troubleshooting

relevant parts check X604

12.288MHz

normal

R668(470Ω) output check

normal

LINE resistance check
DATA:R671 CLK:R670
RST:R665

normal

DVD ASS`Y PS9829 commu­nication status check(P7403)

IC604 PS9829 DATA input check

normal

IC604 PS9829 parts check

relevant parts

replacement

relevant parts

replacement

relevant parts

replacement

Refer to DVD

Troubleshooting

Check each line

resistance check

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

NO

■ PWM ALTERATION PART CHECK

- 2-6 -

P7905 3 PIN+12 13.14.15
PIN 32V

Each IC700,701,702,703

34.29.26.21 PIN input power
check

Each IC 700.701.702.703

1.36.17.18.19 PIN +12V
input power check

PWM MODULATOR input
power check Each IC

4.6.14.16 PIN

POWER IC 700.701.702.703

34.29.27.20 PIN output
check

Output LINE COIL check

normal

Refer to SMPS

Troubleshooting

Each LINE resistance output
power check
IC700:R702.701.726.727.724
IC701:R730.729.750.753.752
IC702:R756.755.768.771.770
IC703:R774.773.794.797.796

relevant parts

replacement

YES

YES

YES

YES

YES

YES

NO

NO

NO

■ POWER AMP PART CHECK

- 2-7 -

Check whether JK800
contacts or not

IC200
(BU4052)4,11PI
N input waveform check

IC200
(BU4052)3,13PIN output
waveform check

IC801 (MC4580)
2,6PIN input waveform check

normal

IC200 (BU4052)16PINVDD,
8PIN VSS power check

u-COM (IC301)83PIN,84PIN
Communication check

Refer to SMPS

Troubleshooting

relevant parts

replacement

IC801 (MC4580)4PIN
VSS,8PIN VDD power check

relevant parts

replacement

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

■ AUX FUNCTION

- 2-8 -

Tuner module (TU601)

operation check

TUNER MODUEL power
check (2PIN 9Vcheck)

IC200 (BU4052)16PIN-

VDD,8PIN VSS power check

relevant parts

replacement

relevant parts

replacement

IC200 (BU4052)16PIN­VDD,8PIN VSS power check

relevant parts

replacement

IC200 (BU4052)16PIN­VDD,8PIN VSS power check

relevant parts

replacement

IC801(MC4580)4PIN
VSS,8PIN VDD power check

IC200(BU4052)1,
12PIN input waveform check

IC200 (BU4052)3,13PIN
output waveform check
IC601(BU4052)2,15PIN
input waveform check

IC801 (MC4580)2,6PIN input
waveform check.

normal

TAPE PCB ASS`Y

IC801 (MC4580)2,6PIN input
check

normal

IC200(BU4052)2,1
5PIN input waveform check

IC200 (BU4052)3,13PIN
output check IC601(BU4052)
2,15PIN input waveform
check

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

■ TUNER FUNCTION CHECK

■ TAPE FUNCTION CHECK

- 2-9 -

P2707:4 PIN ➞ 12V

IC201 (HA12237)16 PIN 12V
input waveform check

IC201:5.26 PIN
Signal Output check

IC20114 PIN MUTE

operation check

normal

Refer to SMPS

Troubleshooting

DECK HEAD input check

DECK HEAD input IC201

32.39 PIN check

HEAD WIRE or
Mecha replacement

relevant parts

replacement

relevant parts

replacement

relevant parts check

normal

IC202 10 PIN HIGH operation

check

relevant parts check

normal

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

■ TAPE PLAY PART CHECK

- 2-10 -

IC604 PS9829 #49,#52 PWM
output check

Refer to PWM modulation
part

Q601 Collector waveform check

Board to Board cantact check

IC203 8 PIN +12V check

relevant parts check

normal

Q205(D1304)
BASE HIGH check

IC202 4 PIN HIGH operation
check

Refer to SMPS

Troubleshooting

relevant parts

replacement

relevant parts

replacement

normal

P7207 #2.#4 output check

P2707 #5.#7 input check

IC203 MC4580 #1,#7 check

IC201 7.24 PIN REC input
check

IC201 10.21 PIN output
check

L203 2.3 PIN oscillation check

P2203 5.3 PIN input check
8 PIN ERASE input check

normal

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

NO

■ TAPE REC PART CHECK

- 2-11 -

Check the fuse F901

Check the DC V of C905.
If DC V is over 400V

Check the DC V Of
C981,C945. If DC V is 6.1V

OK

Chcek the DC VOf
C950,C951 If DC V is in
35V,-35V

Chcek the DC V Of C909,
C903,C921 If DC V is in
14~19V and it is steady.

Replace the fuse

Check BD901, LF901,902

Check IC901 ,902 Replace IC 901,902

Check short of P9702 line

Check short of P9701 line

Check short of P9701,P9702

line

*MAIN PART

YES

NO

YES

YES

YES

YES

YES

NO

NO NO

NO

NO

■ SMPS POWER CIRCUIT

- 2-12 -

Check the PIN6 OF P9702
If DC V is over 5.6V

OK

Check power circuit Trouble
shooting

*P-SENS PART

Check the PIN3 OF P9702
If DC V is over -28V ±2

OK

Check power circuit
Trouble shooting

*VKK PART

YES

YES

NO

NO

- 2-13 -

❏ INTERNAL BLOCK DIAGRAM of ICs

• TAS5142

BLOCK DIAGRAM

- 2-14 -

• U1739EJ2V1UD00/KF2_E

BLOCK DIAGRAM

- 2-15 -

• HA12237F

BLOCK DIAGRAM

- 2-16 -

• STR-S6757IF1905

BLOCK DIAGRAM

• PS9829B

BLOCK DIAGRAM

- 2-17 -

Huffman
Decoder

Video

Processor

32-Bit

Serial Audio

Processor

Interface

RISC

DRAM

Interface

16 K Cache

Gateway

+

DMA

Controller

DVD

RAM

ROM

SRAM/ROM

Interface

GPIO

TV-Encoder

Transport

Descrambler

+

Controller

Scaler

ATAPI

Display

OSD / SPU

DSC

RF AFE

8051

µ

Controller

ECC

Digital

PLL

Audio ADC

Servo Controller / RF

Audio DAC

VDAC

HDMI I/F

DeIntelacer

USB

• ES6838

BLOCK DIAGRAM

- 2-18 -

• PT6324

BLOCK DIAGRAM

❏ BLOCK DIAGRAM

OVERALL AV BLOCK
DIAGRAM

LC6324

REC L/R

12.288 TAS5152_SD

FL+/-, FR+/-

9829_RESET
9829_CLK

LEVEL METER

9829_DAT

MAIN BOARD AMP BOARD9.8304MHz

VFD DATA.CLK
EXP CLK
DATA

RL+/-, RR+/­CENTER +/­WOOFER+/-

TAS5152_PDN

CS5340
CLK.DATA

OP AMP

SUB WOOFER

HEAD WOOFER

DVD DATA.CLK

OPTICAL

USB DA+,-,5V

OP AMP

EXPENDER

DECK

HA12237
TAPE IC

BU4052

OP AMP

CS5340

TUNER

MODULE

NEC

AUDIO

MICOM

PS9829A

PWM

MODUL

ATOR

TAS5142

Power Amp

H/P_SW
PWM OUT

DVD/CD

BLOCK

DECK/AD

MODE A.B

SOL"A"

RM

OP AMP

RDS
DATA CLK

PLL DAT.CLK

BU4052 DATA CS5340 RESET

DVD DATA CLK

12.28MHz

TUNER L/R

TAPE L/R

AUX L/RAUX L/R

MIC INPUT

SOL"B"
MOTER
HIGH/NO

HALF A.B
REC F.R

REC MUTE
REC MUTE

REC RETM
REC SW
REC MUTE

FL

FR

S/W

C/T

RL

RR

2-19 2-20

2-21 2-22

❏ SCHEMATIC DIAGRAMS

• MAIN SCHEMATIC DIAGRAM

MIC

A_MUTE

UART

12S

12S

Y

Y

Y/G

MIC L, R

AUDIO L, R

CYBS,C,pb,pr,R,B

SCI
SDA

MMA[0..1MB]B[0..15]

SPDIF OUT

SPDIF IN

A,B,C,D,E,F,R
CDMDI, DVDMDI
CDDVDCT, VRDVD,VRD
LDO1,LDO2

OPEN/CLOSE

SLED±, F±,T±

48MHz

27MHz

LOAD±,SPINDLE±

USB_RESET

D-, D+

HD[0..15], CONTROL SIGNAL

MCU_INTQ
JRD#,HWR#
MS_SEL_OU
HA0
HD[0..7]

FOCUS/SLED

SPINDLE/TACKING
AMP_STBY

DSCK#,CKE,CSo#,RAS0
CAS#,WE#,DQMX

LA[0..21], LD[0..7]
WRLL#,MRST#,LOE#

AUDIO

JACK

VIDIO

OUT

P/UP

M

DECK MECHANISM

MOTOR

DRIVE

IC

USB

CON

USB

UBI9021

SWITCH

OPT

IN

OPT
OUT

ADC

PWM/DAC

MICOM

SDRAM

MPEG

ESS6838

FLASH

EEPROM

2-23 2-24

• MAIN SCHEMATIC DIAGRAM

2-25 2-26

• MAIN AMP SCHEMATIC DIAGRAM

2-27 2-28

• FRONT SCHEMATIC DIAGRAM

2-29 2-30

• SMPS SCHEMATIC DIAGRAM

2-31 2-32

• DECK SCHEMATIC DIAGRAM

2-33 2-34

• JACK & IO SCHEMATIC DIAGRAM

2-35 2-36

❏ WIRING DIAGRAM

CD/DVD /AMP Power

TO CD/DVD POWER

FRONT 130Wx2

Sub WooferX180W

Center/Surrd X3 60W

DECK Ass‘y

PS9829

SMPS BLOCK

DVD BLOCK

FRONT BLOCK

IO JACK BLOCK

P7206

P7207

P7709

P7302

P7904

P7403

P7501

P7905

P2706 P2707

P2202

P2203

P2201

P0401

P9701

P9702

P3702

P5701

P4703

P4004

LM-K7960 WIRING DIAGRAM

LM-K7960 WIRING DIAGRAM

2-37 2-38

❏ PRINTED CIRCUIT DIAGRAMS

• MAIN P.C. BOARD

2-39 2-40

• MAIN P.C. BOARD

2-41 2-42

• FRONT P.C. BOARD

2-43 2-44

• SMPS P.C. BOARD • DECK P.C. BOARD

- 3-1 -

SECTION 3. DVD PART ELECTRICAL

❏ DVD ELECTRICAL TROUBLESHOOTIHG GUIDE

■ POWER CHECK GUIDE

Y

Y

N

Y

Y

Y

N

N

N

N

Y

POWER ON

POWER ON

DOES DVD/CD

APPEAR AT FLD?

DOES DISK1

APPEAR AT FLD?

CHECK THE

VOLTAGE OF EACH PIN

ON P5701.

CHECK DVD MD

MODULE.

CHECK CONNECTOR

P7501.

RECONNECT IT.

OK.

DOES AUX,FM 87.5

APPEAR AT FLD?

DOES IT

APPEAR DVD

ERROR AT FLD?

PUSH KARAOKE

DVD BUTTON

CHECK

CONNECTOR (P4703,P4004,

P5701)

OK

DOES NO DISC OR

TIME ARE APPEARED

AT FLD?

B

- 3-2 -

POWER ON

SHOW LOGO?

FLASH

MEMORY OPERATES

PROPERLY?

SDRAM WORKS

PROPERLY?

CHECK AV CABLE

CONNECTION TO TV SET.

OUT_SW,IN_SW

SIGNALS OK?

CHECK THE MD MECHA

CHECK THE RELATED CIRCUIT OF

ES6698FD (IC501)PIN

133,134,137,138,139,140

CHECK CONNECTION LINES BETWEEN

SDRAM (IC502)&ES8381 OR THE

SDRAM IS DAMAGED.

CHECK THE OUTPUT SIGNAL

OF ES8381 TO IC401 FOR

CONTROL OPEN/CLOSE

CHECK THE TRAY CONTROL

I/O PIN ON IC401.

OPEN /CLOSE

SIGNALS ON IC401 ARE

OK?

LOAD+&LOAD-

SIGNALS ON PDM02

ARE OK?

CHECK THE CABLE

CONNECTION BETWEEN DVD

PCB AND MD (MECHA)

DOES

FIRST TRAY MOVE INSIDE

WHEN IT IS AT CLOSED

POSITION?

ES8381 VIDEO

OUTPUTS PROPERLY?

CHECK CONNECTION LINES BETWEEN

FLASH &ES8381 OR THE FLASH ACCESS

TIME WHETHER IS SUITABLE OR NOT.

■ TEST &DEBUG FLOW

Y

Y

Y

Y

Y

Y

Y

Y

Y

NN

N

N

NN

N

N

- 3-3 -

DOES THE SLED
MOVE TO INNER SIDE
WHEN IT IS AT OUTER

POSITION?

LIMIT SW SIGNAL

ON P4407 IS LOW?

SLED SIGNAL IS OK?

CHECK THE CABLE

CONNECTION WITH MECHA.

PROPER FOCUS

OUTPUTS TO MOTOR

DRIVER?

PROPER F+&F-

OUTPUTS?

CHECK THE MOTOR DRIVER (IC401).

CHECK FOCUS CONNECTION ON

ES8381 AND MOTOR DRIVER IC.

CHECK THE RELATED CIRCUIT OF

SLED AND MOTOR DRIVER IC (IC401)

CHECK THE MD

CHECK CABLE CONNECTION

WITH PICK-UP HEAD.

DO NOT PUT IN DISC AND

TRAY CLOSE.

OPTICAL

LENS IS MOVING FOR

SEARCHING FOCUS?

B

C

Y

Y

Y

Y

Y

Y

Y

NN

N

NN

N

- 3-4 -

C

LASER TURNS ON

WHEN READING

DISC?

DVDLD OR CDLD

OUTPUT PROPERLY?

CHECK CABLE CONNECTION

BETWEEN PDM01 AND

PICK-UP HEAD.

PROPER SPINDLE

SIGNAL ON ES8381.

SPIN+&SPIN-

OUTPUT PROPERLY?

CHECK THE CABLE

CONNECTION BETWEEN

PDM03 AND MD

CHECK THE SPINDLE CONTROL OF

MOTOR DRIVER (IC404).

CHECK THE SPINDLE RELATED CIRCUIT

ON ES8381

CHECK THE RELATED CIRCUIT OF

LASER POWER TRANSISTOR.

CHECK THE LASER POWER CIRCUIT

BETWEEN ES8381 AND POWER TRANSIS-

TOR. (Q405,Q406)

COLLECTOR

VOLTAGE OF POWER

TRANSISTOR IS OK?

(Q405,Q406)

PUT DISC IN TRAY.

DOES SPINDLE

ROTATE?

D

Y

Y

Y

Y

Y

Y

Y

N

N

N

N

N

N

- 3-5 -

D

E

FOCUS ON OK?

PROPER SIGNAL ON

A,B,C,D FROM MD?

CHECK THE CONNECTIONS BETWEEN

PDM01 AND PICK-UP HEAD.

CHECK THE RELATED CIRCUIT OF ES8381

FOCUS SIGNAL.

CHECK THE RELATED CIRCUIT BETWEEN

IC401 AND ES8381

CHECK THE TRACKING CONTROL

ON MOTOR DRIVER (IC401).

PROPER FOO SIGNAL

ON IC401?

CHECK CABLE CONNECTION

BETWEEN PDM01 AND MD.

PROPER TRO SIGNAL

ON IC401?

T+&T-OUTPUT

PROPERLY?

CHECK CABLE CONNECTION

ON PICK-UP HEAD.

CHECK RF SIGNAL WAVE-

FORM.

TRACKING OK?

DISC PLAY?

Y

Y

Y

Y

Y

Y

Y

NN

N

N

N

N

N

- 3-6 -

E

ALL

OUTPUTS ARE OK

DURING PLAYING

DISK ?

TEST END

AUDIO SIGNAL DATA ON

P4703 IS OK?

CHECK THE MAIN PCB

PICTURE

SIGNAL DATA ON ES8381

IS OK?

FOR EXAMPLE COMPOSITE VIDEO ,
CHECK THE VIDEO MUTE TR (Q411),

OUTPUT OF VIDEO BUFFER IC (IC407)AND

ES8381 VIDEO SIGNAL DATA

CHECK THE CONNECTIONS BETWEEN

ES8381 AND P4703

Y

Y

NN

NN

- 3-7 -

■ USB PART

TURN ON USB

“SEARCHING ”OR

“USB ”DISPLAY CHECK

READING OK CHECK

OK

CHECK THE POWER SUPPLY CIRCUIT.

(CHECK P5701)

CHECK THE HRST#SIGNAL

CHECK THE USB PART AND DVD PART

LINE.

CHECK THE USB JACK POWER SUPPLY.

(CHECK P4302)

CHECK THE USB DATA LINE.(P4302)

CHECK THE IC405 (UBI9021).(CHECK

DATA LINE PIN 14~17,20~23)

N

N

Y

Y

Y

Y

Y

Y

Y

- 3-8 -

WHEN POWER ON,RESET &DATA ETC WAVEFORM

1.RESET(DVD)

2.RX

3.TX

4.LCS3#(FLASH)

Playing at USB

function

1.HRST#

2.5V

3.D-

4.D+

■ WAVEFORM

- 3-9 -

OPEN/CLOSE WAVEFORM AT POWER ON

STARTING ACTION WAVEFORM IN MD DEVICE

1.Limit SW

2.OPEN

3.CLOSE

1.SLO (from

MPEG)

2.SLED-

3.SLED+

(At Power on )

- 3-10 -

FOCUS WAVEFORM (AT CD)

FOCUS WAVEFORM (AT DVD)

1.FDO

2.F+

3.F-

(INSERT CD )

(INSERT DVD )

1.FDO

2.F+

3.F-

- 3-11 -

1.Spind

2.Spin+

3.Spin-

1.A

2.B

3.C

4.D

AT POWER ON ,SPINDLE SIGNAL AT MD DECK

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

- 3-12 -

TRACKING SIGNAL

RF WAVEFORM

1.Tro

2.Tr-

3.Tr+

- 3-13 -

DISK TYPE JUGEMENT WAVEFORM

1.F+

2.FDO

3.SVRRF

(DVD)

(CD)

- 3-14 -

3-15 3-16

❏ DVD SCHEMATIC DIAGRAMS

• MPEG SCHEMATIC DIAGRAM

3-17 3-18

• RF & SERVO SCHEMATIC DIAGRAM

3-19 3-20

• INTERFACE SCHEMATIC DIAGRAM

3-21 3-22

• USB SCHEMATIC DIAGRAM

3-23 3-24

❏ PRINTED CIRCUIT DIAGRAMS

• DVD P.C. BOARD

3-25 3-26

• DVD P.C. BOARD

4-1 4-2

SECTION 4. EXPLODED VIEWS

❏ CABINET AND MAIN FRAME SECTION

266

451

A26

451

267

305

263

264

259

258

256

255

254

252

250

251

253

257

255

A00

451

450

260

280

A47

A48

A41

A46

A49

451

261

CN201

CABLE1

CABLE2

451

451

265

A43

A44

451

281

A51

CABLE3

CABLE4

A50

OPTIONL

4-3 4-4

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

023

015

022

019

037

021

020

018

017

006

A01

008

007

001

002

003

009

009

011

013

A02

025

LOCA. NO. LG PART NO. DESCRIPTION SPECIFICATION

A00 6720AG0013A DECK,AUDIO CWN42FR605 TOKYO PIG

A01 6768RZUP01A DECK MECHANISM PARTS 50-093-4XXXX PIGEON UNIT PC

A02 6768R-EP05A DECK MECHANISM PARTS 50-093-41234 PIGEON HEAD ASSY

001 6768RZBP04A DECK MECHANISM PARTS 02-083-4266 ÄPIGEON BELT/FEC

002 6768RZBP05A DECK MECHANISM PARTS 02-083-4267 PIGEON BELT/FEL

003 6768R-PP03A DECK MECHANISM PARTS 33-160-4309 PIGEON PRESS CASSE

006 6768R-QP04A DECK MECHANISM PARTS 50-093-41299 PIGEON MOTOR(ASSY

007 6768RZGP03A DECK MECHANISM PARTS 50-222-41226 PIGEON GEAR ID

008 6768R-SP01F DECK MECHANISM PARTS 01-082-4598 PIGEON SPRING CWL4

009 6768R-MP01C DECK MECHANISM PARTS 50-219-4014 PIGEON MOLD CWL44

011 6768R-SP01A DECK MECHANISM PARTS 01-081-4601 PIGEON SPRING CWL4

013 6768RZSP02A DECK MECHANISM PARTS 01-082-4688 PIGEON SPRING

015 6768R-AP01A DECK MECHANISM PARTS 50-268-3016 PIGEON ARM CWL44

017 6768R-AP01C DECK MECHANISM PARTS 50-239-4072 PIGEON ARM CWL44

018 6768R-GP01J DECK MECHANISM PARTS 50-222-4428 PIGEON GEAR CRL442

019 6768R-SP01P DECK MECHANISM PARTS 01-081-4678 PIGEON SPRING CRL4

020 6768R-BP01C DECK MECHANISM PARTS 02-083-4188 PIGEON BELT/FELT C

021 6768R-LP01C DECK MECHANISM PARTS 50-223-4429 PIGEON PULLEY/FLYW

022 6768RZVP03A DECK MECHANISM PARTS 50-093-4780 PIGEON SOLENOID

023 6768RZGP05A DECK MECHANISM PARTS 50-221-31320 PIGEON GEAR ASSY

025 6768RZJP02A DECK MECHANISM PARTS 50-093-31032 PIGEON PULLEY/FLY

037 6768R-JP03A DECK MECHANISM PARTS 50-093-4674 PIGEON PULLEY/FLYW

4-5 4-6

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

016

018

007

008

015

019

021

020

017

A03

009

003

011

013

009

022

025

023

LOCA. NO. LG PART NO. DESCRIPTION SPECIFICATION

A00 6720AG0013A DECK,AUDIO CWN42FR605 TOKYO PIG

A03 6768RZHP02A DECK MECHANISM PARTS ASSY B-DECK PIGEON HEAD

003 6768R-PP03A DECK MECHANISM PARTS 33-160-4309 PIGEON PRESS CASSE

007 6768RZGP03A DECK MECHANISM PARTS 50-222-41226 PIGEON GEAR ID

008 6768R-SP01F DECK MECHANISM PARTS 01-082-4598 PIGEON SPRING CWL4

009 6768R-MP01C DECK MECHANISM PARTS 50-219-4014 PIGEON CWL44

011 6768R-SP01A DECK MECHANISM PARTS 01-081-4601 PIGEON SPRING CWL4

013 6768RZSP02A DECK MECHANISM PARTS 01-082-4688 PIGEON SPRING

015 6768R-AP01A DECK MECHANISM PARTS 50-268-3016 PIGEON ARM CWL44

016 6768R-GP04A DECK MECHANISM PARTS 50093-41399 PIGEON GEAR AS

017 6768R-AP01C DECK MECHANISM PARTS 50-239-4072 PIGEON ARM CWL44

018 6768R-GP01J DECK MECHANISM PARTS 50-222-4428 PIGEON GEAR CRL442

019 6768R-SP01P DECK MECHANISM PARTS 01-081-4678 PIGEON SPRING CRL4

020 6768R-BP01C DECK MECHANISM PARTS 02-083-4188 PIGEON BELT/FELT C

021 6768R-LP01C DECK MECHANISM PARTS 50-223-4429 PIGEON PULLEY/FLYW

022 6768RZVP03A DECK MECHANISM PARTS 50-093-4780 PIGEON SOLENOID

023 6768RZGP05A DECK MECHANISM PARTS 50-221-31320 PIGEON GEAR ASSY

025 6768RZJP02A DECK MECHANISM PARTS 50-093-31032 PIGEON PULLEY/FLY

4-7 4-8

❏ DECK MECHANISM EXPLODED VIEWS

LOCA. NO. PART NO. DESCRIPTION SPECIFICATION

A26 4405RCS007E MECHANISM ASSEMBLY DVM-H1523(DP-9 SS P/UP)DVD 3
A30 3041RBD003H BASE ASSEMBLY PU (DVM-H1533 DP-10 SS P/UP) H
012 5040R-0110A RUBBER DVD REAR DP8 RIGHT 20 OTHER BL
012A 5040R-0110A RUBBER DVD REAR DP8 RIGHT 20 OTHER BL
021 4681R-B009C MOTOR ASSEMBLY DECK/MECHA DP-10 FEEDING
024 4470R-0179A GEAR DVD DP-9 PINION MOLD
025 4470R-0178A GEAR DVD DP-9 MIDDLE MOLD
030 4470R-0180A GEAR DVD DP-9 RACK MOLD
035 6871R-9295D PWB(PCB) ASSEMBLY,TOTAL DP-10 FOR 3 CHANGER FEEDING
035A 6850R-JE20Z CABLE,FLAT P=1.0 FFC UL2896(0.05X0.65)11
036 4370R-0136A SHAFT DVD PU, DR-02 SUS-420J2 OTHER
151 3390RB0002A TRAY DISC(CDM-H1503)
153 4470RB0005A GEAR TRAY (CDM-H1503)
155 4681RBA001C MOTOR ASSEMBLY HOME TRAY (CDM-H1503) MABUCHI
156 6871RF9211A PWB(PCB) ASSEMBLY,FRONT 1503 T/D SENSOR
159 3390RB0001B TRAY DECK/MECHA CDM-H1503 MOLD LOAD
162 4400R-0012A BELT DECK/MECHA MAIN CDM-H1503V OTH
163 4470R-0190A GEAR DECK/MECHA PULLEY CDM-H1503V M
164 4470RB0003A GEAR LOADING (CDM-H1503)
165 6871RZ7036A PWB(PCB) ASSEMBLY,OTHERS CDM-H1503 UP/DW/OP/CL
166 4470RB0006A GEAR PU UP (CDM-H1503)
167 4470RB0007A GEAR PU DOWN (CDM-H1503)
168 4470RB0002A GEAR CAM (CDM-H1503)
169 4861RB0002B CLAMP ASSEMBLY DVD DVM-H1513
170 3550R-0685A COVER DECK/MECHA GUIDE MOTOR CDM-H15
172 3040RB0005A BASE MAIN (CDM-H1503)
173 4510RB0001A LEVER S/W CLOSE
175 4681RBA002A MOTOR ASSEMBLY HOME LOADING (PULLEY 8.6)
177 4470RB0001A GEAR MAIN (CDM-H1503)
180 3210R-M009A FRAME UD MOLD DVM-H1523V
416 88H-0004 CD MECHA PARTS 3X12X12FNM
417 88H-0002 CD MECHA PARTS 3X9X12FZMY
418 88H-0003 SCREW,DRAWING #NAME?
419 88H-0004 CD MECHA PARTS 3X12X10FZMY
422 88H-0005 SCREW #NAME?
430 88H-0006 SCREW,DRAWING + 1 D1.7 L7.0 SWCH18A/BZN DP8
431 88H-0007 SCREW,DRAWING + 1 D1.7 L4.5 SWCH18A/NI DP8 P
432 88H-0008 SCREW,DRAWING + 1 D1.7 L4.5 SWRCH18A/FZY DP8
435 88H-0009 SCREW,DRAWING MACHINE
439 88H-0010 SCREW,DRAWING + 1 D1.7 L10.0 SWRCH18A/FZW DP

416

159

422

170

165

164

417

417

167

416

177

175

172

180

166

151

156

418

155

153

168

162

163

419

173

169

012A

A30

432

024

430

036

035

438

021

030

439

025

431
435

035A

012A

- 5-1 -

SECTION 5. SPEAKER SECTION

❏

MODEL: LMS-K3960V

760

762

761

763

758

757

756

759

753

754

755

752

751

750

A70

RIGHT

LEFT

- 5-2 -