LG 50PG60UD User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PT81A
MODEL : 50PG60UD 50PG60UD-DA
website:http://biz.LGservice.com
Internal Use Only
CH
VOL
MENU
INPUT ENTER

- 2 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ..........................................................................3
SPECIFICATION........................................................................................4
ADJUSTMENT INSTRUCTION .................................................................6
TROUBLE SHOOTING ............................................................................11
BLOCK DIAGRAM...................................................................................20
EXPLODED VIEW .................................................................................. 27
SVC. SHEET ...........................................................................................29

- 3 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the
Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent
X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An isolation Transformer should always be used during the
servicing of a receiver whose chassis is not isolated from the AC
power line. Use a transformer of adequate power rating as this
protects the technician from accidents resulting in personal injury
from electrical shocks.
It will also protect the receiver and it's components from being
damaged by accidental shorts of the circuitry that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this monitor is blown, replace it
with the specified.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Due to high vacuum and large surface area of picture tube,
extreme care should be used in handling the Picture Tube.
Do not lift the Picture tube by it's Neck.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead of ohm-meter to the AC
plug prongs tied together and touch other ohm-meter lead in turn to
each exposed metallic parts such as antenna terminals, phone
jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩand 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC voltmeter
with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC voltage
measurements for each exposed metallic part. Any voltage
measured must not exceed 0.75 volt RMS which is corresponds to
0.5mA.
In case any measurement is out of the limits specified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
IMPORTANT SAFETY NOTICE
0.15uF

- 4 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
SPECIFICATIONS
NOTE : Specifications and others are subject to change without notice for improvement .
VApplication Range
This spec is applied to the 42” PLASMA TV used PT81A Chassis.
V Specification
Each part is tested as below without special appointment.
1) Temperature : 25±5°C (77±9°F), CST : 40±5
2) Relative Humidity: 65±10%
3) Power Voltage: Standard Input voltage (110V@60Hz)
* Standard Voltage of each product is marked by models.
4) Specification and performance of each parts are followed each drawing and specification by part number in accordance with SBOM.
5) The receiver must be operated for about 20 minutes prior to the adjustment.
VTest Method
1) Performance : LGE TV test method followed.
2) Demanded other specification
Safety : CE, IEC specification
EMC : CE, IEC
VGeneral Specification ( XGA Module)
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Specification Remark
42” Wide Color Display Module
16:9
PDP42G1,
RGB Closed(Well) Type, Glass Filter(38%)
Pixel Format : 1024horiz. By 768 ver.
1)Temp. : 0~40deg
2)Humidity : 10~80%
3)Temp. : -20~60deg
4)Humidity : 10~90%
100-240V~, 50/60Hz
Plasma Display Panel
LGE SPEC.
Maker : LG
Chassis
PA81A 42PG20D-DA Taiwan LG
Model Name Market Brand Remark
42PG20D-DA BSMITaiwan
Model ApplianceMarket Remark

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Only for training and service purposes
VModule Specification2
Market
Broadcasting system
Receiving system
MNT Out (1EA)
Video Input (2EA)
S-Video Input(1EA)
Component Input(2EA)
RGB Input(1EA)
HDMI Input(2EA)
Audio Input (6EA)
1
2
3
4
5
6
7
8
9
10
No Item Specification Remark
Taiwan
Analog : NTSC-M, DTV : DVB-T
1) VHF : 2~13
2) UHF : 14-69
3) CATV : 1, 14~125
4) DTV : 14~69
NTSC
NTSC
NTSC
Y/Cb/Cr, Y/Pb/Pr
RGB-PC
HDMI-DTV & SOUND
PC Audio, Component, AV
Rear : 1
Rear : 1, Side : 1
Side : 1
60Hz Only
60Hz Only
60Hz Only
L./R Input

- 6 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application Object
These instructions are applied all of the 42” PLASMA TV,
PT81A Chassis.
2. Note
V The module keeping condition: The normal temperature
condition(more than 15°C)
-> Immediately the line supply.
V The module keeping condition: 0°C
-> The module must be kept for more than 2 hours at the
normal temperature.
V The module keeping condition: -20°C
-> The module must be kept for more than 3 hours at the
normal temperature.
V The case of Gu-mi factory at the winter season.
-> The module must be kept for more than 5 minutes at the
heating zone(40°C~45°C).
(1) Because this is not a hot chassis, it is not necessary to use
an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
(4) The input voltage of the receiver must keep 100-240V~,
50/60Hz.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
OAfter RGB Full white HEAT-RUN Mode, the receiver must
be operated prior to adjustment.
OEnter into HEAT-RUN MODE
1) Press the POWER ON KEY on R/C for adjustment.
2) OSD display and screen display PATTERN MODE.
- Select “3. Test Pattern” by using D/E(CH+/-) and
press ENTER(V)
- Select “White” by using (F/GVOL+/-) and press
ENTER(V)
* Set is activated HEAT-RUN without signal generator in
this mode.
* Single color pattern(RED/BLUE/GREEN) of HEAT-RUN
mode uses to check PANEL.
* Caution : If you turn on a still screen more than 20
minutes(Especially digital attern, cross hatch
pattern), an after image may be occur in the black
level part of the screen.
3. S/W auto download using the USB
Memory stick
(1) Insert the USB memory sick the PCB ASSEMBLY.
(2) Using ‘power on’ button of the control R/C, power on TV.
(3) S/W download process is executed automatically.
4. Auto-control adjustment process
(ADC, model-name, EDID)
V All adjustment process is executed one time through RS-232C.
V Command send -> ADC Calibration -> Model name
download -> EDID download.
VAdjsutment process protocol(RS-232C)
VDefined model name protocol(RS-232C)
5. Manual model name download
(1) Press ADJ KEY on R/C for model name D/L.
(2) Select “0.Model Option” and press ENTER(V).
(3) Select model name by using D/E(CH+/-)and press
ENTER(V).
* The module keeping condition
* Using ‘power on’ button of the control R/C, power on TV.
USB file(EPK) version must be bigger than downloaded
version of main B/D.
* Using ‘power on’ button off the control R/C, power on TV.
1
2
3
4
5
6
7
8
9
10
Ready
ADC
ADC
Confirmation
ADC
Mode Out
EDID
Download
Check EDID
Status
Download
Mode In
Define model
name
Download
Mode Out
Adjustment
Confirmation
NO Item Remark CMD1 CMD2 Data 0
a
a
a
a
a
a
a
a
a
a
d
d
d
d
e
e
e
e
e
e
0
0
0
9
0~4,9
0~4,9
0
1~9
0
9
0
1
9
9
1
2
0
5
9
9
Ready
ADC start
All=0 ; HDMI1,2,3,4=1,2,3,4 ; RGB=9
All=0 ; HDMI1,2,3,4=1,2,3,4 ; RGB=9
Transmitting adjustment mode In
instruction, operate adjustment command.
Model define index(Data0) are listed at
next table.
EDID data existence check in SET
assembly
ae51 42PG20D-AA
CMD1 CMD2 Data 0 Remark
42PG20D-DA 52013360
Model Name Model Option Value

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Only for training and service purposes
6. Manual ADC Adjustment
V Adjustment is done using internal ADC, so input signal is
not necessary.
V Do not connect external input cable.
6-1. Required Equipment
(1) Press ADJ KEY on R/C and enter EZ ADJUST.
(2) Select “1.EDID D/L” by using D/E(CH+/-) and press
ENTER(V).
(3) Select “Start” by using F/G(VOL+/-) and press ENTER(V).
(4) ADC Adjustment is executed automatically.
7. EDID Download
7-1. Required Equipment
(1) Press ADJ KEY on R/C and enter EZ ADJUST.
(2) Select “5.EDID D/L” by using D/E(CH+/-) and press
ENTER(V).
(3) Select “Start” and press ENTER(V).
(4) EDID download is executed automatically.
(5) Press EXIT key on R/C.
7-2. EDID DATA
(1) HDMI1(256bytes)
(2) RGB (128bytes)
-> Detail EDID Options below( , , , , )
. Product ID
. Serial No : Conntrolled on producion line.
. Month, Year : Conntrolled on producion line.
Model Name
Checksum : Changeable by total EDID data.
8. PCMCIA CARD Checking Method
You must adjust DTV 29 Channel and insert PCMCIA CARD
to socket.
(1) If PCMCIA CARD works normally, normal signals display
on screen. But it work abnormally, “No CA module” words
display on screen.
*Do not connect HDMI and RGB cable.
NO SIGNAL or White noise NO SIGNAL
RF Input AV / Component / RGB input
42PG20D 42PG20D 40309(9D75)
40310(9D76) Analog(RGB) Digital(HDMI)
MODEL EDID MODEL Product_ID FUNCTION
42PG20D 00 00 00 FC 4C 47 54 56 0A 20 20 20 20 20 20 20
MODEL NAME MODEL NAME(HEX)
* Set up “RF mode” before launching products.

- 8 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
9. POWER PCB Assy Voltage
Adjustments (Va, Vs Voltage adjustments)
9-1. Test Equipment :D.M.M. 1EA
9-2.Connection Diagram for Measuring
: refer to Fig.1
9-3. Adjustment Method
(1) Va Adjustment
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M to Va pin of P811, connect
- terminal to GND pin of P811.
3) After turning VR901, voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)
(2) Vs Adjustment
1) Input signal : RF noise signal.
2) Connect + terminal of D.M.M to Vs pin of P811, connect
– terminal to GND pin of P811.
3) After turning VR951, voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)
10. Adjustment of White Balance
10-1. Required Equipment
(1) Color Analyzer : CA-1000, CA-100+(CH.10) CA-210(CH.10).
* Please adjust CA-100+/CA-210 by CS-1000 before
measuring.
-> You should use Channel 10 which is Matrix
compensated(White, Red, Green, Blue revised) by CS-
1000 and adjust in accordance with balance adjustment
coordinate.
W Color temperature standards according to CSM and Module.
W Change target luminance and range of the Auto adjustment
W/B equipment.
W White balance adjustment coordinate and color temperature.
* PC(for communication through RS-232C)
-> UART Baud rate : 115200 bps
Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
(Fig.1) Connection diagram of power adjustment for measuring
* Press the POWER ON KEY on R/C before Model name download.
Befor adjusting White-balance, the AV ADC should be done.
If ADC status were “NG”, Need to ADC adjustment.
PLASMA Remark
11000K
9300K
6500K
Cool
Normal
Warm
CSM
65
20 Range
Target luminance
0.276
0.283
0.000
0.276±0.002
0.283±0.002
0.000
0.276±0.002
0.283±0.002
0.000
X
y
uv
Cool CS-1000 CA-100+(CH.10) CA-210(CH.10)
0.285
0.293
0.000
0.285±0.002
0.293±0.002
0.000
0.285±0.002
0.293±0.002
0.000
X
y
uv
Medium CS-1000 CA-100+(CH.10) CA-210(CH.10)
0.313
0.329
0.003
0.313±0.002
0.329±0.002
0.003
0.313±0.002
0.329±0.002
0.003
X
y
uv
Warm CS-1000 CA-100+(CH.10) CA-210(CH.10)

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Only for training and service purposes
10-2. Connection Picture of the Measuring
Instrument(On Automatic control)
(1) Inside PATTERN is used when W/B is controlled. Connect
to auto controller or push control R/C IN-START -> Enter
the mode of White-Balance, the pattern will come out.
10-3. Auto-control interface and directions
(1) Adjust in the place where the influx of light like floodlight
around is blocked.(illumination is less than 10ux)
(2) Measure and adjust after sticking the Color Analyzer(CA-
100+, CA210) to the side of the module.
(3) Aging time
- After ajing start, keep the power on(no suspension of
power supply) and heat-run over 15minutes.
- keep white pattern using inside pattern.
V Auto adjustment Map(RS-232C)
11. Adjustment of White Balance
(1) Press ADJ KEY on R/C and enter EZ ADJUST.
Select “3. Test Pattern” by using D/E(CH+/-) and press
ENTER(V)
Select “White” by using F/G(VOL+/-) and press ENTER(V)
and heat run over 15minutes.
(2) Zero Calibrate CA-100+/CA-210, and when controlling,
stick the sensor to the center of PDP module.
(3) Press ADJ KEY on R/C and enter EZ ADJUST.
Select “2. White Balance” and press G(VOL +).
Set test-pattern on and display inside pattern.
(5) Control is carried out on three color temperatures, COOL,
MEDIUM,WARM.
(Control is carried out thress times)
<Temperature : COOL>
- R-Cut / G-Cut / B-Cut is set to 64
- Control R-Gain and G-Gain.
- Each Gain is limited to 192.
<Temperature : MEDIUM>
- R-Cut / G-Cut / B-Cut is set to 64
- Control R-Gain and G-Gain.
- Each Gain is limited to 192.
<Temperature : WARM>
- R-Cut / G-Cut / B-Cut is set to 64
- Control G-Gain and B-Gain.
- Each Gain is limited to 192.
12. Input the Shipping Option Data
1) Push the IN-START key in a Adjust Remocon.
2) Input the Option Number that was specified in the BOM, into
the Shipping area.
3) The work is finished, Push VKey.
13. Set Information
(Serial No& Model name)
13-1. Check the serial number & Model Name
(1) Push the menu button in DTV mode.
(2) Select the SETUP -> Diagnostics -> To set.
(3) Check the information.
(Fig.3) Auto AV(CVBS) Color Balance Test Pattern
R Gain
G Gain
B Gain
R Cut
G Cut
B Cut
45G1
Cool Med Warm Cool Med Warm
jg Ja js 00 192 192 192 255
jh Jb je 00 192 192 192 255
ji Jc jf 00 192 192 192 255
65 65 62 128
56 56 53 128
71 70 76 128
RS-232C COMMAND
[CMD ID DATA]
Min CENTER
(DEFAULT) MAX

- 10 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
14. SET factoring condition
(1) This adjustment is setting factory shipment mode.
(2) Push the IN-STOP key of adjustment remote controller before
the factory shipment.
1
2
3
4
5
6
7
8
9
Antenna
10
Off
16:9
1
Vivid
Medium
Off
Auto
Standard
Off
0
On
On
--
Off
On
Off
Normal
Level 0
Item ConditionNo
Remark
Input Mode
Volume Level
Mute
Aspect Ratio
SET ID
Picture PSM
Color Temp.
Advanced Cinema
Black level
Sound SSM
AVL
Balance
TV Speaker
Time Auto Clock
Manual Clock
Off Timer / On Timer
Sleep Timer / Auto Off
Option SIMPLINK
Key Lock
ISM Method
Power Saving

- 11 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TROUBLE SHOOTING GUIDE
1. Power Board
1-1. The whole flowchart which it follows in voltage output state
Start check
Manufacture enterprise
meaning of a passage
1. Check the Power Off
condition.
Doesn't the
screen whole come
out?
Is it identical
with Power Off
condition?
Yes
Yes
No
No
No
No
No
2. Check the Interface
signal condition.
Is the Interface
signal operated?
Yes
3. Check the St-by 5V
signal circuit.
Doesn't the
low pressure output
come out?
Doesn't the
St-by 5V signal
come out?
Yes
Yes
No
4. Check the 5V Monitor
signal circuit.
Doesn't the
5V Monitor signal
come out?
Yes
7. Check the VSC Vs-ON
signal
Doesn't the
high tension output
come out?
Doesn't the
VSC signal Vs-ON
come out?
Yes
Yes
Does
high tension
output voltage Drop
occur?
When the
Y B/D Module
input connector is
removed, does output
voltage drop
occur?
When the
Y, Z B/D Module
input connector is remove,
does Power Board hightension
output voltage Drop
occur?
Yes No No
9. Check the Power
Board Output high
tension circuit
Yes
10. Check the Z B/D
Module output circuit
Yes
When the
Z B/D Module
input connector is
removed, does output
voltage Drop
occurs?
11. Check the Y B/D
Module output circuit
Yes
No
8. Check the Vs, Va
voltage output circuit.
Doesn't the
Vs, Va voltage output
come out?
Yes
No
No
5. Check the VSC RL-ON
signal.
Doesn't the
VSC signal RL-ON
come out?
Yes
6. Check the VSC low
pressure output
Doesn't the
VSC low pressure
output come out?
Yes

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Only for training and service purposes
1-2. Power Board Structure
(1) Pin Layout
CN1 P11 P12
AC INLET PDP MODULE
AC
NC
AC
YH396-03P
Vs
Vs
NC
GND
GND
Va
Va
GND
M5V
M5V
YH396-10P
Vs
Vs
NC
GND
GND
Va
Va
GND
M5V
M5V
YH396-10P
1
2
3
4
5
6
7
8
9
10
Wafer P/N
NO P21
SMW200-22C
VSC BOARD
1/2
3/4
5/6
7/8
9/10
11/12
13/14
15/16
17/18
19/20
21/22
Wafer P/N
16V
GND
12V
GND
5V
5V
GND
GND
5V_MNT
RL_ON
M5V_ON
16V
GND
12V
GND
5V
5V
GND
GND
AC_DET
VaVs_ON
GND
NO
(2) Pin Spec

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Only for training and service purposes
2. No Power
(1) Symptom
1) Doesn’t minute discharge at module.
2) Non does not come in into the front LED.
(2) Check following
A Power cord is plugged with TV set? Plug the power cord.
Yes
No
Is the AC-INLET connected with
the power board? Connect the AC-INLET
Yes
No
Is the Fuse(F101,F801) on
Power Board normal? Replace the Fuses.
Yes
No
Is the Power Board with
VSC Board though Cable connected? Connect the Cable.
Yes
No
Measure output voltages(16V,12V,5V) on the power board.
If the measured values is not normal, replace power board.

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Only for training and service purposes
3. Protect Mode
(1) Symptom
1) After once shining, it does not discharge minutely
from module.
2) The Rely falls.(The sound is audible “click”)
3) It is converted with the color where the front LED
is red from green.
(2) Check following
Is the Power Board
normal ? Replace Power Board.
Is output the normality Low/High
voltage except Stand-by 5V?
Yes
No No
Is the each connector
normal? Replace the connector.
Replace
Y-Board.
After connecting well each connector,
the normality it operates?
Yes
No Yes
Is the Ctrl Board
normal? Replace the Ctrl-Board.
Is the output voltage normal after
remove P163 connector of Ctrl-B/D?
Yes
No Yes
Is the Y-Board
normal?
Is the output voltage
normal after remove
P209 connector of
Y-B/D?
Is the Fuse(FS201) on Y-B/D
normal?(In case of open is replace)
Yes
No Yes Yes
Replace
Z-Board.
Is the Z-Board
normal?
Is the output voltage
normal after remove
P3 connector of Z-
B/D?
Is the Fuse (FS1) on Z-B/D normal?
(In case of open is replace)
Yes
No Yes
Is the X- Board
normal?
Is the output voltage normal after
remove P242 connector of
X-B/D?
After remove P211 output voltage normality:
Replace Right X-B/D
After remove P23 output voltage normality:
Replace Left X-B/D
Yes
No Yes
Is the
VSC Board normal? Is the output voltage normal after remove P1001 of VSC Board?
After crisis COF of each board, check the normality operates.
If in case normality operates, correspondence COF Fail is replace the module.
After remove P1001 normal operation:
Replace VSC Board
Yes
No
Is the COF of X, Y, Z
normal ?
No
Yes
Yes

- 15 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Does minute discharge
At Module?
Is the LVDC cable
normal?
Is the VAVS on?
Check the PDP Module
Yes
No
YES
Yes
Reconnect the LVDS
cable in P501
No
Is the IC700(FLI106X0H)
Output normal? Replace the VSC.
No
NO Replace the Power
board
Is output the normality
Low/High voltage except
stand-by 5V?
NO
4. No Raster
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the front LED is green.
(2) Check following

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Only for training and service purposes
5. In case of occurring strange screen into specific mode
5-1. In case the OSD does not displayed
(1) Symptom
1) LED is green.
2) The minute discharged continuously becomes Accomplished from module.
(2) Check following
Is the LVDS cable
normal ?
Is the VSC Board
normal?
Is the LVDS cable
connected?
Connect the LVDS cabel
with the VSC board.
Yes
No
No
Yes
Is the IC100(FLI106X0H)
normal?
Replace the
IC100(FLI106X0H)
No
Is the Ctrl Board of
Module normal? Replace the Ctrl B/D.
No
No
Yes Replace the VSC B/D
Replace the LVDS cable.
Yes

- 17 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5-2. In case of does’t display the screen into specific mode
(1) Symptom
1) The screen does not become the display from specific input mode
(RF, AV, Component, RGB, DVI).
(2) Check following
1) Check the all input mode should become normality display .
(3) In case of becomes unusual display from RF mode
(4) In the case of becomes unusual display from side S-video/AV mod
Is the Tuner normal? Is the RF cable connected with TV
Set?
Connect the RF cable.
Yes
No
No
Is the IC100(FLI106X0H)
normal?
Replace the Tuner(TU301).
No
Is the Input voltage, IIC Communication
and CVBS output normal?
Yes
Is the IIC communication waveform
between the tuner and IC100 normal?
No
Block A
Replace the
IC100(FLI106X0H).
No
Is the Video input of the AV
(JK105, JK106) normal? Check the input source
No
Same as Block A

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Only for training and service purposes
(5) In the case of becomes unusual display from Component, RGB mode
(6) In the case of becomes unusual display from HDMI mode
(7) In the case of becomes unusual display from SCART mode
Is the R,G,B input and H,V
Sync of the JK104 normal? Check the input source
No
Is the HDMI(IC201)
normal?
Yes
Same as Block A
Is the TMDS waveform between the
IC and HDMI jacks normal?
No
Is the Video input of AV
jack normal?
Yes
Same as Block A
Check the input source
No
Replace the IC201.
No
Yes
Same as Block A

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Only for training and service purposes
6. In case of no sound
(1) Symptom
1) LED is Green.
2) Screen display but sound is not output.
(2) Check following
All input(mode) is no
sound?
Only HDMI is No
Sound?
Yes
Download
the EDID data
Yes
No YES
Only RF is no sound? Check
the Tuner’s IN/OUTPUT
Yes
No
Is the IC629 normal? Replace the IC629
(MSP4458)
No
Is the IC601 normal? Replace the IC601
(NTP-3000A)
No
YES
Replace the VSC Board
YES
Is the speakers turned
on? Set on the speakers on
menu.
No
Is the speaker Cable
connect? Connect the Speaker Cable.
No
Yes

- 20 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
BLOCK DIAGRAM