LG RHT-397-H, RHT-398-H Service manual

DVB-T/HDD/DVD RECORDER

SERVICE MANUAL

MODEL: RHT397H/RHT398H

CAUTION

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

MODEL: RHT397H/RHT398H

SERVICE MANUAL

P/NO : AFN35914227 MARCH, 2008

Website http://biz.lgservice.com

Internal Use Only

CONTENTS

SECTION 1.........SUMMARY

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

SECTION 3.........ELECTRICAL

SECTION 4.........RS-06A LOADER PART

SECTION 5.........REPLACEMENT PARTS LIST

1-1

LGE Internal Use Only

SECTION 1

SUMMARY

CONTENTS

NEW FUNCTIONS OF DVB-T/HDD/DVD RECORDER...................................................................1-3

PRODUCT SAFETY SERVICING GUIDELINES FOR DVB-T/HDD/DVD RECORDER PRODUCTS

SERVICING PRECAUTIONS....................................................................................................................1-5

• GENERAL SERVICING PRECAUTIONS

• INSULATION CHECKING PRODEDURE

• ELECTROSTATICALLY SENSITIVE (ES) DEVICES

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

.......................................................................................1-4

UPGRADE THE MAIN & LOADER PROGRAM.................................................................................1-7

SPECIFICATIONS ........................................................................................................................................1-9

LGE Internal Use Only

1-2

Only for training and service purposes

NEW FUNCTIONS OF DVB-T/HDD/DVD RECORDER

• HDMI

HDMI IS THE SPECIFICATION FOR THE HIGH-DEFINITION MULTIMEDIA INTERFACE. HDMI IS PROVIDED FOR TRANSMITTING DIGITAL TELEVISION AUDIOVISUAL SIGALS FROM HDD-DVD RECODER TO TELEVISION SETS, OTHER VIDEO DISPLAYS. HDMI CAN CARRY HIGH QUALITY MULTI-CHANNEL AUDIO DATA AND CAN CARRY ALL STANDARD AND HIGH DEFINITION CONSUMER ELECTRONICS VIDEO FORMATS. CONTENT PROTECTION TECHNOLOGY IS AVAILABLE. HDMI CAN ALSO CARRY CONTROL AND STATUS INFORMATION IN BOTH DIRECTIONS.

<< OPERATING >>

AUDIO, VIDEO AND AUXILIARY DATA IS TRANSMITTED ACROSS THE THREE TMDS DATA CHANNELS. THE VIDEO PIXEL CLOCK IS TRANSMITTED ON THE TMDS CLOCK CHANNEL AND USED BY THE RECEIVER AS A FREQUENCY REFERENCE FOR DATA RECOVERY ON THE THREE TMDS DATA CHANNELS. VIDEO DATA IS CARRIED AS A SERIES OF 24-BIT PIXELS ON THE THREE TMDS DATA CHANNELS. TMDS ENCODING CONVERTS THE 8BIT PER CHANNEL INTO THE 10BIT DC-BALANCED. VIDEO PIXEL RATES CAN RANGE FROM 25MHz TO 165MHz. THE VIDEO PIXELS CAN BE ENCODED IN EITHER RGB, YCbCr 4:4:4 OR YCbCr 4:2:2 FORMATS. IN ALL THREE CASES, UP TP 24 BITS PER PIXEL CAN BE TRANSFERRED.

FAST DUBBING

DUBBING MEANS A COPYING FUNCTION BETWEEN HDD TO DVD DISCS. COPYING BETWEEN HDD TO DVD IS A COMPLETELY DIGITAL PROCESS AND THEREFORE INVOLVES NO LOSS OF QUALITY IN THE AUDIO OR VIDEO. SO THIS MEANS THAT COPYING CAN BE CARRIED OUT AT THE MAXIMUM SPEED POSSIBLE.

<< DUBBING SPEED RATE >>

NORMAL DUBBING : SPEED RATE MAX X1 FAST DUBBING : SPEED RATE MAX X4

WHEN FAST DUBBING FROM HDD TO DVD, THE SPEED OF COPYING DEPENDS ON THE RECODING MODE AND THE KIND OF USING THE DVD DISC, AND THIS MODE IS NOT AVAILABLE FOR EDITED VIDEO TITLE IN HDD. WHEN FAST DUBBING FROM DVD TO HDD, ONLY AVAILABLE WHEN COPYING VR MODE DISC(DVD-RW) TO HDD, AND ONLY NORMAL DUBBING AVAILABLE WHEN COPYING VIDEO MODE DISC(DVD+RW/RW, DVD-R) TO HDD.

1-3

LGE Internal Use Only

PRODUCT SAFETY SERVICING GUIDELINES FOR

DVB-T/HDD/DVD RECORDER PRODUCTS

IMPORTANT SAFETY NOTICE

This manual was prepared for use only by properly trained audio-video service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from LG Corporation. All components should be replaced only with types identical to those in the original circuit and their physical location, wiring and lead dress must conform to original layout upon completion of repairs.

Special components are also used to prevent x-radiation, shock and fire hazard. These components are indicated by the letter “x” included in their component designators and are required to maintain safe performance. No deviations are allowed without prior approval by LG Corporation. Circuit diagrams may occasionally differ from the actual circuit used. This way, implementation of the latest safety and performance improvement changes into the set are not delayed until the new service literature is printed.

CAUTION

tomized installations without manufacturer’s approval. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury.

Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines.

GRAPHIC SYMBOLS

SERVICE INFORMATION

While servicing, use an isolation transformer for protection from AC line shock. After the original service problem has been corrected, make a check of the following:

FIRE AND SHOCK HAZARD

1. Be sure that all components are positioned to avoid a possibility of adjacent com-

2. Verify that all protective devices such as insulators, barriers, covers, shields, strain

3. Soldering must be inspected to discover possible cold solder joints, solder splash-

4. Check for physical evidence of damage or deterioration to parts and components,

5. No lead or component should touch a high current device or a resistor rated at 1

6. After reassembly of the set, always perform an AC leakage test on all exposed

: Do not attempt to modify this product in any way. Never perform cus-

The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service literature. The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the service personnel to the presence of noninsulated “dangerous voltage” that may be of sufficient magnitude to constitute a risk of electric shock. The pictorial representation of a fuse and its rating within an equilateral triangle is intended to convey to the service personnel the following fuse replacement caution notice: CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKED NEAR EACH FUSE.

ponent shorts. This is especially important on items trans-ported to and from the repair shop.

reliefs, power supply cords, and other hardware have been reinstalled per the original design. Be sure that the safety purpose of the polarized line plug has not been defeated.

es, or sharp solder points. Be certain to remove all loose foreign particles.

for frayed leads or damaged insulation (including the AC cord), and replace if necessary.

watt or more. Lead tension around protruding metal surfaces must be avoided.

metallic parts of the cabinet (the channel selector knobs, antenna terminals, handle and screws) to be sure that set is safe to operate without danger of electrical shock. DO NOT USE A LINE ISOLATION TRANSFORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt or more sensitivity in the following manner: Connect a 1500 ohm, 10 watt resistor, paralleled by a .15 mfd 150V AC type capacitor between a known good earth ground water pipe, conduit, etc.) and the exposed metallic parts, one at a time. Measure the AC voltage across the combination of 1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using a non-polarized adaptor and repeat AC voltage measurements for each exposed metallic part. Voltage measured must not exceed 0.75 volts RMS. This corresponds to 0.5 milliamp AC. Any value exceeding this limit constitutes a potential shock hazard and must be corrected immediately.

TIPS ON PROPER INSTALLATION

1. Never install any receiver in a closed-in recess, cubbyhole, or closely fitting shelf space over, or close to, a heat duct, or in the path of heated air flow.

2. Avoid conditions of high humidity such as: outdoor patio installations where dew is a factor, near steam radiators where steam leakage is a factor, etc.

3. Avoid placement where draperies may obstruct venting. The customer should also avoid the use of decorative scarves or other coverings that might obstruct ventilation.

4. Wall- and shelf-mounted installations using a commercial mounting kit must follow the factory-approved mounting instructions. A product mounted to a shelf or platform must retain its original feet (or the equivalent thickness in spacers) to provide adequate air flow across the bottom. Bolts or screws used for fasteners must not touch any parts or wiring. Perform leakage tests on customized installations.

5. Caution customers against mounting a product on a sloping shelf or in a tilted position, unless the receiver is properly secured.

6. A product on a roll-about cart should be stable in its mounting to the cart. Caution the customer on the hazards of trying to roll a cart with small casters across thresholds or deep pile carpets.

7. Caution customers against using extension cords. Explain that a forest of extensions, sprouting from a single outlet, can lead to disastrous consequences to home and family.

LGE Internal Use Only

1-4

Only for training and service purposes

SERVICING PRECAUTIONS

CAUTION: Before servicing the DVB-T/HDD/DVD RECORDER covered by this service data and its supplements and addends, read and follow the SAFETY PRECAUTIONS. NOTE: if unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions in this publication, always follow the safety precautions. Remember Safety First:

General Servicing Precautions

1. Always unplug the DVB-T/HDD/DVD RECORDER AC power cord from the AC power source before: (1) Removing or reinstalling any component, circuit board,

module, or any other assembly.

(2) Disconnecting or reconnecting any internal electrical

plug or other electrical connection.

(3) Connecting a test substitute in parallel with an electrolyt-

ic capacitor. Caution: A wrong part substitution or incorrect polarity installation of electrolytic capacitors may result in an explosion hazard.

2. Do not spray chemicals on or near this DVB-T/HDD/DVD RECORDER or any of its assemblies.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES 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 ES 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 ES devices.

3. Unless specified otherwise in this service data, clean electrical contacts by applying an appropriate contact cleaning solution to the contacts with a pipe cleaner, cotton-tipped swab, or comparable soft applicator. Unless specified otherwise in this service data, lubrication of contacts is not required.

4. Do not defeat any plug/socket B+ voltage interlocks with which instruments covered by this service manual might be equipped.

5. Do not apply AC power to this DVB-T/HDD/DVD RECORDER and/or any of its electrical assemblies unless all solid state device heat sinks are correctly installed.

6. Always connect the test instrument ground lead to an appropriate ground before connecting the test instrument positive lead. Always remove the test instrument ground lead last.

Insulation Checking Procedure

Disconnect the attachment plug from the AC outlet and turn the power on. Connect an insulation resistance meter (500V) to the blades of the attachment plug. The insulation resistance between each blade of the attachment plug and accessible conductive parts (Note 1) should be more than 1Mohm. Note 1: Accessible Conductive Parts include Metal panels, Input terminals, Earphone jacks,etc.

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 ES devices.

5. Do not use freon-propelled chemicals. These can generate an electrical charge sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil, or comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.

Caution: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Normally 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 ES device.)

1-5

LGE Internal Use Only

SERVICE INFORMATION FOR EEPROM IC SETTING

1. Press both “CLEAR” button on the Remocon and “ OPEN/CLOSE” button on the Front Panel about ±5 sec.

The picture on OSD will be as bellow : MODEL : RHT397H/RHT398H

OP1 : DA/DA 00000000

OP2 : 30/30 00000000 071102A OP3 : D3/D3 00000000 OP4 : 60/60 00000000 OP5 : 0E/0E 00000000 OP6 : AE/AE 00000000 OP7 : 47/47 00000000 Write : OK OP8 : 02/02 00000000 E x i t : MP OP9 : 0D/0D 00000000 Move : < > OPA : 00/00 00000000 E d i t :

5 Checksum of Option : 0x1105 DVD read time : --- second CD read time : 10 sec -- > OK

2. To MOVE from OP1 (Option 1) to another option, press button on the Remote Control.

3. To CHANGE the option code, press button on the Remote Control.

4. To APPLY the option Code, after change the option press OK/Enter button on Remote Control.

5. To INITIALIZE the system, press “CLEAR” button on the R/C together with “ OPEN/CLOSE” on the Front Panel about ±5 sec. Note : This process will only clear the mapping channel and not delete data on HDD.

6. To exit from the option Code menu without Initialize the system, just turn off the power and then turn on again.

LGE Internal Use Only

1-6

Only for training and service purposes

UPGRADE THE MAIN & LOADER PROGRAM

1. MAKING UPGRADE DISC MAIN SW AND

LOADER SW

1) Do Physical format as ISO9660 or JOLIET file system

2) Don’t care about the CD Volume label

3) Write Main SW file and Loader SW file on Root

Main SW file name is :

- LG_RH300_UPDATE_PAL.ROM

Loader SW file name is :

- DvdS620.rs6

- YASMS620

2. UPGRADE MAIN S/W

1) Insert Upgrade DISC into the Set

2) Press “DVD” button on the Remocon

3) After Disc Reading, CD Data Inspection Process. OSD like below :

5) Press “PLAY” button to update S/W and another button to cancel.

6) Main S/W under updated. Do not turn off the power during updating process...!

7) If updating succeed, tray disc will be opened.

Take the disc and turn off the power.

8) Turn on the power, and check the Main S/W Version.

3. UPGRADE LOADER S/W

1) Insert Upgrade DISC into the Set

2) Press “DVD” button on the Remocon

3) After Disc Reading, CD Data Inspection Process. OSD like below :

4) If CD Data inspection OK, there will be message on OSD as below :

1-7

4) If CD Data inspection OK, there will be message on OSD as below :

And Disc tray will be opened. Take off the disc

LGE Internal Use Only

5) Press “PLAY” button to update S/W and another button to cancel.

6) Loader S/W under updated. Do not turn off the power during updating process...!

If updating succeed, after completed there will be message :

Power will be automatically turn off.

7) Turn on the power and check the Loader S/W Version.

3) Select menu “LOCK”

4) Press button number 7 - 8 - 8 - 9 on the Remocon The picture on TV screen as below :

4. S/W VERSION INFORMATION

1) Press the “HOME” button on the Remocon

2) Select “EASY MENU” --> Select “SETUP”

LGE Internal Use Only

1-8

Only for training and service purposes

SPECIFICATIONS

• GENERAL

Power requirements AC 200 ~ 240V, 50/60Hz Power consumption 30W Dimensions (approx.) 430 X 49 X 275mm (w x h x d) without foot Net weight (approx.) 4kg Operating temperature 5°C to 35°C Operating humidity 5% to 90% Television system Analog: PAL I, B/G, I/I, SECAM D/K, K1, SECAM L color system

Digital: DVB-T standard compliant

Recording format PAL

• RECORDING

Recording format DVD Video Recording, DVD-VIDEO Recordable media HDD (320GB), DVD-ReWritable, DVD-Recordable, DVD+ReWritable,

DVD+Recordable, DVD+Recordable (Double Layer), DVD-RAM

Recordable time DVD (4.7GB) : Approx. 1hour (XP mode), 2hours (SP mode),

4hours (LP mode), 6hours (EP mode), 11hours (MLP mode)

DVD+R DL (8.5GB) : Approx. 2.9hour (XP mode),

3.8hours (SP mode), 7.3hours (LP mode), 9.1hours (EP mode)

HDD (320GB, MPEG2 Recording) :

Approx. 85hours (XP mode), 129hours (SP mode), 323hours (LP mode), 456hours (EP mode), 1081hours (MLP mode)

Video recording format

Sampling frequency 27MHz Compression format MPEG2 or MPEG4 (HDD only)

Audio recording format

Sampling frequency 48kHz Compression format Dolby Digital

• PLAYBACK

Frequency response DVD (PCM 48kHz) : 8Hz to 22kHz, CD : 8Hz to 20kHz

DVD (PCM 96kHz) : 8Hz to 44kHz Signal-to-noise ratio More than 100dB (AUDIO OUT connector) Harmonic distortion Less than 0.008% (AUDIO OUT connector) Dynamic range More than 95dB (AUDIO OUT connector)

• INPUTS

ANTENNA IN Antenna input, 75ohms VIDEO IN 1.0Vp-p 75ohms, sync negative, RCA jack x 1 / SCART x 2 AUDIO IN 2.0Vrms more than 47kohms, RCA jack (L, R) x 1 / SCART x 2 DV IN 4pin (IEEE 1394 standard) USB IN 4pin (USB 1.1 standard) PCMCIA CARD IN 68pin (Common interface): RH3xxC only

• OUTPUTS

S-VIDEO OUT (Y) 1.0V (p-p), 75Ω, sync negative, Mini DIN 4-pin x 1

(C) 0.3V (p-p), 75Ω COMPONENT VIDEO OUT (Y) 1.0V (p-p), 75Ω, sync negative, RCA jack x 1

(Pb)/(Pr) 0.7V (p-p), 75Ω, RCA jack x 2 HDMI video/audio output 19pin (HDMI standard, Type A) Audio output (digital audio) 0.5V (p-p), 75Ω, RCA jack x 1 Audio output (optical audio) 3V(p-p), Optical connector x 1 Audio output (analog audio) 2.0Vrms (1kHz, 0dB), 600Ω, RCA jack (L, R) x 1 / SCART x 2

1-9

LGE Internal Use Only

MEMO

LGE Internal Use Only

1-10

Only for training and service purposes

SECTION 2

CABINET & MAIN CHASSIS

CONTENTS

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

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

2. DECK MECHANISM SECTION (RS-06A).................................................................................................2-3

3. PACKING ACCESSORY SECTION...........................................................................................................2-4

2-1

LGE Internal Use Only

EXPLODED VIEWS

1. CABINET AND MAIN FRAME SECTION

463

462

300

462

A54

CABLE10

A26

463

261

468

CABLE7

G

104

468

E

A54A

C

A53

F

CABLE11

HDMI

BOARD

50 2

468

OPTIONAL PARTS

44 A

1 26

273

274

TIMER

BOARD

CABLE2

D

286

81 2

468

MAIN

465

46 A

E

BOARD

D

5 46

468

264

468

COMMON

H

CABLE12

BOARD

2 45

A55

261

2 45

A50

261

452

275

CABLE1

260

52 4

5 27

2

46346

470

5 46

468

G

I

253

I/O BOARD

468

52 A

20 3

H

A47

A

SMPS

BOARD

I

CABLE13

C

71

468

F

101

10 4

A

ABLE6 C

4

B

CABLE5

LGE Internal Use Only

468

261

2-2

KEY

BOARD

285

A43

A43A

280

Only for training and service purposes

2. DECK MECHANISM SECTION (RS-06A)

1431

1001

RS-06A(DR-11H)

1003

A002

1026

1433

1016

1017

1002

1013

A001

1041

1432

1011

1020

1030

1434

1033

1032

1034

1437

1025

1038

1432

1036

1432

1015

1012

DR-11H

A005

1019

1018

: IN, SH ONLY

1045

10

43

D

1019

1018

A

005

R-11H

1047

OPTIONAL PART

: PT ONL

10

1042

43

Y

1045

10

44

2-3

A46A

Main C.B.A

1046

1439

LGE Internal Use Only

3. PACKING ACCESSORY SECTION

810

Accessory Assembly

808 Battery

900 Remote Control

801

Instruction Ass'y

OPTIONAL PARTS

806 RCA Plug(Black)

821 SCART Cable

804 Bag

803 Packing

802 Box

803 Packing

LGE Internal Use Only

2-4

Only for training and service purposes

SECTION 3

ELECTRICAL

CONTENTS

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER SUPPLY ON SMPS BOARD .............3-2

2. POWER SUPPLY ON I/O BOARD ...................3-4

3. SYSTEM CIRCUIT PART ..................................3-8

4. DISC NOT RECOGNIZED.................................3-8

5. WHEN PLAYING DISC,

NO AUDIO OUTPUT ..........................................3-9

6. NO OPTICAL/DIGITAL OUTPUT....................3-10

7. NO TUNER AUDIO OUTPUT..........................3-11

8. NO EXTERNAL AUDIO INPUT .......................3-12

9. NO RGB / COMPONENT VIDEO SIGNAL

WHEN PLAY DISC...........................................3-13

10. NO COMPOSITE / S-VIDEO SIGNAL

WHEN PLAY DISC...........................................3-14

11. NO TV, EXTERNAL INPUT

VIDEO SIGNAL ................................................3-15

12. NO DV (IEEE1394)

INPUT (VIDEO/AUDIO) SIGNAL ....................3-16

13. NO DVB_T AUDIO / VIDEO OUTPUT ...........3-17

...........3-2

WAVEFORMS..........................................................3-18

1. SYSTEM BLOCK .............................................3-18

2. VIDEO BLOCK (COLOR BAR INPUT)...........3-21

3. AUDIO BLOCK (1kHz SINEWAVE INPUT)....3-22

4. SERIAL INTERFACE BLOCK

(BETWEEN MAIN & I/O)..................................3-24

5. TUNER BLOCK ................................................3-25

7. HDMI BLOCK ...................................................3-26

4. POWER MAIN BOARD BLOCK DIAGRAM ..3-33

5. I/O BOARD BLOCK DIAGRAM ......................3-34

6. VIDEO INPUT BLOCK DIAGRAM..................3-35

7. VIDEO OUTPUT BLOCK DIAGRAM..............3-36

8. AUDIO INPUT BLOCK DIAGRAM..................3-37

9. AUDIO OUTPUT BLOCK DIAGRAM..............3-38

10. POWER I/O BLOCK DIAGRAM......................3-39

11. FLD TIMER BOARD BLOCK DIAGRAM........3-40

12. POWER TIMER AND

CI BLOCK DIAGRAM.......................................3-41

CIRCUIT DIAGRAMS...........................................3-43

1. SMPS CIRCUIT DIAGRAM.............................3-43

2. MPEG CIRCUIT DIAGRAM.............................3-45

3. FLASH / DDR CIRCUIT DIAGRAM................3-47

4. IEEE1394 CIRCUIT DIAGRAM.......................3-49

5. ATAPI / HDMI / USB CIRCUIT DIAGRAM......3-51

6. I/O µ-COM CIRCUIT DIAGRAM .....................3-53

7. SCART / RCA CIRCUIT DIAGRAM ................3-55

8. TUNER / DECODER CIRCUIT DIAGRAM ....3-57

9. LDO CIRCUIT DIAGRAM................................3-59

10. COMMON INTERFACE BOARD

CIRCUIT DIAGRAM .........................................3-61

11. HDMI DAUGHTER BOARD

CIRCUIT DIAGRAM .........................................3-63

12. TIMER CIRCUIT DIAGRAM (8 & 9 TOOLS)..3-65

13. KEY CIRCUIT DIAGRAM (8 & 9 TOOLS)......3-67

• CIRCUIT VOLTAGE CHART ....................3-69

WIRING DIAGRAMS............................................3-27

1. WIRING DIAGRAM 1.......................................3-27

2. WIRING DIAGRAM 2.......................................3-28

BLOCK DIAGRAMS.............................................3-30

1. OVERALL BLOCK DIAGRAM.........................3-30

2. SMPS BOARD BLOCK DIAGRAM.................3-31

3. MAIN BOARD BLOCK DIAGRAM..................3-32

PRINTED CIRCUIT BOARD DIAGRAMS...3-77

1. MAIN P.C.BOARD ............................................3-77

2. I/O P.C.BOARD.................................................3-79

3. SMPS (POWER) P.C.BOARD.........................3-83

4. TIMER & KEY P.C.BOARD..............................3-85

5. COMMON INTERFACE P.C.BOARD .............3-87

6. HDMI P.C.BOARD ............................................3-87

3-1

LGE Internal Use Only

ELECTRICAL TROUBLESHOOTING GUIDE

1. POWER SUPPLY ON SMPS BOARD

No .5.3VA

YES

Is the F101 normal? Replace the F101 (Use the same Fuse)

YES

Is the BD101 normal? Replace the BD101

YES

Is the R101 normal? Replace the R101

YES

Is Vcc

(10V~17V) supplied to

IC101 Pin6?

NO

Is the D102 normal?

NO

YES

Is the D128 normal? Replace the D128

YES

Is there

about 2.5V at

NO

Check or Replace D102

Replace the IC103

IC103 Pin1?

YES

Is the IC102 normal? Replace the IC102

YES

Is the D121 normal? Replace the D121

YES

Is the D122 normal? Replace the D122

YES

Is the D125 normal? Replace the D125

YES

Is the D124 normal? Replace the D124

NO

Is the D127 normal?

Is the D126 normal? Replace the D126

Power Line of I/O PCB is short

LGE Internal Use Only

YES

NO

3-2

Replace the D127

Only for training and service purposes

No 5V for HDD &

DVD Loader

YES

Is the 5.5V supplied

To IC156 Pin1?

YES

Is the

IC156 Pin4 “H”?

YES

Check or Replace IC156

No 12V for HDD &

DVD Loader

YES

Is the 13.5V supplied

To IC155 Pin1?

NO

Check or Replace D125

Check the ‘PWR CTL

“H”’ signal from µ-COM

Check or Replace D124

YES

Is the

IC155 Pin4 “H”?

YES

Check or Replace IC155

NO

3-3

Check the ‘PWR CTL

“H”’ signal from µ-COM

LGE Internal Use Only

2. POWER SUPPLY ON I/O BOARD

No SW_12VG

YES

Is the

Vcc (14V) supplied to

Q164 collector?

YES

Is there

about 12.5V at

ZD151 & Q164

base?

YES

Is the

Vcc (33V) supplied

to Q162 emiter?

YES

Is there

about 0V at

Q162 base?

YES

NO

Check D124 on SMPS

board and Replace

Check Q164 and Replace

Check D126 on SMPS

board and Replace

Check Q162 and Replace

about 5.3V at R170

and 0.7V at Q165

Check Q165 and Replace

LGE Internal Use Only

Is there

base?

YES

NO

3-4

Check power supply

SW_5.3VA on I/O board

Only for training and service purposes

No 5.0VD

YES

Is there about 5.3V at the IC602 Pin1?

YES

Is there about 4V ~ 5V

at the IC602 Pin4?

YES

Check the IC602 and Replace

No 3.3V

YES

Is there about 3.8V at the IC152 Pin1?

NO

Check 5.3VA on SMPS board

Check the ‘PWR CTL “H”’

signal from µ-COM

Check D127 on SMPS

board and Replace

YES

Is there about 4V ~ 5V

at the IC152 Pin 4?

YES

Check the IC152 and Replace

NO

3-5

Check the ‘PWR CTL “H”’

signal from µ-COM

LGE Internal Use Only

No 2.5V

YES

Is there about 3.3V

at the IC151 Pin1?

YES

Is there about 4V ~ 5V

at the IC151 Pin4?

YES

Check the IC151 and Replace

No 1.8V

YES

Is there about 3.3V

at the IC154 pin 3 ?

YES

Check the IC154 and Replace

NO

Check D154 on I/O and

D127 on SMPS board

Check the ‘PWR CTL “H”’

signal from µ-COM

Check power supply 3.3V on I/O board

No SW_5.3VA

Is the VCC (5.3V) Supplied to Q158

Is there about 0V

at R179 and R156?

Check the Q158 and Replace

LGE Internal Use Only

YES

emiter ?

YES

NO

Check 5.3VA on SMPS board

Check the “1W_H” signal from µ-COM

3-6

Only for training and service purposes

No SW_FD(+)

YES

Is the

Vcc (FD+) supplied to

Q163 collector?

YES

Is there

about 5.3V at R184 and

Q163 collector?

YES

Is the

VCC (5.3V) supplied to

Q153 emiter?

YES

Is there about 0V

at Q153 base?

YES

Check the Q153 and Replace

NO

Check D121 on SMPS

board and Replace

Check Q163 and Replace

Check 5.3VA on SMPS board

Check the “1W_H” signal from µ-COM

No 1.25V

YES

Is there

about 5.3V at IC153

Pin1 and 8?

YES

Is there

about 2V ~ 3V at the

IC153 Pin5?

YES

Check the IC153 and Replace

NO

Check 5.3VA on SMPS board

Check the ‘PWR CTL “H”’

signal from µ-COM

3-7

LGE Internal Use Only

3. SYSTEM CIRCUIT PART

“Please wait” displayed

continue at power on

YES

IC1198 : .

(/RST_HOST)

YES

X1101 :

Clock oscillated?

(13.5MHz)

YES

IC1201 Pin26 :

YES

R1173, R1174 : ?

4. DISC NOT RECOGNIZED

NO

Check IC701 Pin62

Replace X1101

Check IC1201 (Flash memory),

IC1201 (DDRAM)

IC1101 defect

DISC not recognized

ATAPI connector

LGE Internal Use Only

Check

driver power?

5V, 12V

YES

Check

YES

Check loader

NO

3-8

Check SMPS

Change MEDIA TEST

Only for training and service purposes

5. WHEN PLAYING DISC, NO AUDIO OUTPUT

When playing DISC, no Audio output

Check Q801,Q808,

Q809,Q810

Check

IC802 Pin8

(SW_12VG)

YES

NO

IC803

Pin14,15 :

Is there a

signal?

YES

IC803 Pin1,16

(Z_Mute_R/L) : .

IC701 Pin24

(Sys_Mute_L) :

YES

IC802 Pin1,7

Is there a signal

YES

Check

NO NO

IC803

Pin5,6,7,8 : .

Pin3,4 (Host CLK

&DATA) :

YES

Check

IC803 Pin11 (5.0VD)

YES

Replace IC803

IC1101

defect

Replace IC802

Pin34,35,37,38 :

Is there a signal?

L806, L826,L810,L825

Is there a signal ?

Cable connections &

TV Audio mute

IC801

YES

Check

3-9

Check IC801

NO

Pin14 (12V) Pin30 (5.3V)

Pin31,32 (SCL,SDA) :

NO

Replace

IC801

LGE Internal Use Only

6. NO OPTICAL/DIGITAL OUTPUT

R1107 : .

Is there a signal?

PVM02 Pin2 (SPDIF_OUT) : .

YES

Check

YES

R857 : .

Is there a signal?

YES YES

Check JK803 Pin2 (5V)

YES YES

Check JK803 &

optical cable connection

C858 : .

Is there a signal?

L805 : .

Is there a signal?

Check JK802 &

RCA cable connection

LGE Internal Use Only

3-10

Only for training and service purposes

7. NO TUNER AUDIO OUTPUT

TU701 Pin17 (SIF) :

Is there a signal?

YES

IC901 Pin106, 107

Is there a signal?

YES

IC801 Pin40, 41 : Is there a signal?

YES

NO

Check

IC801 Pin14 (12V)

Pin30 (5, 3V) Pin31, 32

(SCL, SDA) : .

NO

Replace IC801

IC901 Pin 98,

99, 100, 95 (Ain_D0,

AIN_SCLK, AIN_FSYNC,

AIN_MCLK) : Is there

a signal?

YES

When playing DISC,

no audio output

NO

Check Pin51

/RST_SAA7138

Is there a signal?

YES

X901 (24.576MHz)

oscillated?

YES

R906, R909

(SCL/SDA)

Is there a signal?

YES

IC901 defect

NO

Check reset from IC1101

Change X901

Check IC901 power

3.3V & 1.8V

3-11

LGE Internal Use Only

8. NO EXTERNAL AUDIO INPUT

< AV3 >< AV1/AV2>

IC801 Pin2,3,5,6 :

Is there a signal?

YES

IC801 Pin40,41 :

Is there a signal?

YES

NO NO

Pin12,14 & CN1 Pin17,19

Check cable connections

& input signal.

Check IC801

NO YES

Pin14 (12V)

Pin30 (5,3V)

Pin31,32

(SCL,SDA) : .

C941,C942 :

Is there a signal?

Check PVM01 & PMV01 Pin12,14

NO

Check PMT03

NO

YES

Replace IC801

IC901 Pin98,

99,100,95 (Ain_D0,

AIN_SCLK,AIN_FSYNC,

AIN_MCLK) :

Is there

a signal?

YES

When playing DISC,

no Audio output

NO

Pin51

/RST_SAA7138

Is there a

Signal?

YES

X901

(24.576MHz)

oscillated?

YES

R906,R909

(SCL/SDA) : Is there

a signal?

YES

IC901 Defect

NO

Check

Reset from IC1101

Change X901

Check IC901 Power

3.3V & 1.8V

LGE Internal Use Only

3-12

Only for training and service purposes

9. NO RGB / COMPONENT VIDEO SIGNAL WHEN PLAY DISC

PVM01 and PMV01 Pin5,7,9 :

Is there a signal?

YES

IC801 Pin24,25,26 :

Is there a signal?

YES

NO

IC801 Pin14 (12V) Pin30 (5, 3V)

Pin31, 32 (SCL, SDA) : .

Check

Check condition

RGB_Sel_Out & Comp_Mute_L

YES

Check cable connection Replace IC801

YES

3-13

LGE Internal Use Only

10. NO COMPOSITE / S-VIDEO SIGNAL WHEN PLAY DISC

PVM01 and PMV01

Pin1,4,6 :

Is there a signal?

YES

IC801 Pin27,29 :

Is there a signal?

YES

Check S-VIDEO

cable connection

NO

Check IC801 Pin14 (12V)

Pin 30 (5, 3V) Pin31,32

(SCL,SDA) : .

YES

Replace IC801

NO

IC801 Pin36,39 :

Is there a signal?

YES

Check SCART

cable connection

LGE Internal Use Only

3-14

Only for training and service purposes

11. NO TV, EXTERNAL INPUT VIDEO SIGNAL

No video signal of

external input AV3

(Front RCA input)

R905 :

Is there a

signal ?

YES

NO NO

Check PVM01 & PMV01 Pin8

NO

Check PMT03

Pin16 & CN1

Pin15

NO

Check

cable connection &

input signal

When Cable

connecting Tuner and

Rear SCART1,2 No TV

video signal (AV1/2)

C859,C896,

C895 : Is there a

signal?

YES

IC801

Pin42 : Is there a

signal?

YES

IC801 Pin14

NO

(12V) Pin30 (5,

3V) Pin31, 32

(SCL, SDA) :

Check

.

YES

Replace

IC801

IC901 Pin(56,57,58,

61,62,63,64,65,72) VIN_D0-D7, VCLK :

is there a signal?

YES

When playing DISC, no audio output

3-15

Pin51

/RST_SAA7138 : Is

there a Signal?

YES

X901

(24.576MHz)

oscillated?

YES

R906,R909

(SCL/SDA) : Is there

a signal?

YES

IC901 defect

NONO

Check

reset from

IC1101

NO

Change X901

NO

Check

IC901 power

3.3V & 1.8V

LGE Internal Use Only