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
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
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.
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
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.)
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
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 :
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
1-9
LGE Internal Use Only
MEMO
LGE Internal Use Only
1-10
Copyright © 2008 LG Electronics. Inc. All right reserved.
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
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
B
CABLE5
LGE Internal Use Only
468
261
2-2
KEY
BOARD
285
A43
A43A
280
Copyright © 2008 LG Electronics. Inc. All right reserved.
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
: 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
Copyright © 2008 LG Electronics. Inc. All right reserved.
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
NO
NO
NO
Is the D102 normal?
NO
YES
Is the D128 normal? Replace the D128
YES
Is there
about 2.5V at
NO
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
NO
NO
NO
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
YES
YES
NO
NO
3-2
Replace the D127
Copyright © 2008 LG Electronics. Inc. All right reserved.
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
NO
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
NO
NO
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
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
NO
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
NO
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
YES
NO
NO
Check 5.3VA on SMPS board
Check the “1W_H” signal from µ-COM
3-6
Copyright © 2008 LG Electronics. Inc. All right reserved.
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
NO
NO
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
NO
Check 5.3VA on SMPS board
Check the ‘PWR CTL “H”’
signal from µ-COM
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
NO
NO
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
NO
3-8
Check SMPS
Change MEDIA TEST
Copyright © 2008 LG Electronics. Inc. All right reserved.
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
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
IC801
YES
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
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
NO
NO
Check reset from IC1101
Change X901
Check IC901 power
3.3V & 1.8V
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
NO
NO
Check
Reset from IC1101
Change X901
Check IC901 Power
3.3V & 1.8V
LGE Internal Use Only
3-12
Copyright © 2008 LG Electronics. Inc. All right reserved.
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
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
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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
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