LG 42PG2500 User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PD82A
MODEL : 42PG2500 42PG2500-ZA
North/Latin America http://aic.lgservice.com
Europe/Africa http://eic.lgservice.com
Asia/Oceania http://biz.lgservice.com
Internal Use Only

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Only for training and service purposes
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ..........................................................................3
SPECIFICATION........................................................................................4
ADJUSTMENT INSTRUCTION .................................................................7
TROUBLE SHOOTING............................................................................16
BLOCK DIAGRAM...................................................................................24
EXPLODED VIEW .................................................................................. 25
SVC. SHEET ...............................................................................................
PRINTED CIRCUIT DIAGRAM....................................................................

- 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 Exploded View.
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
1.5 Kohm/10W
To Instrument’s
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF

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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 PLASMA TV used PD82A 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 (100-240V~, 50/60Hz)
* 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
Chassis
PD82A 50PG6500
42PG6500
50PG4500
50PG7500
42PG3500
50PG3500
42PG2500
50PG2500
France LG
Model Name Market Brand Remark
50PG6500
42PG6500
50PG4500
50PG7500
42PG3500
50PG3500
42PG2500
50PG2500
Safety : IEC/EN60065
EMI : EN55013
EMS : EN55020
France
Model ApplianceMarket
TEST
Remark

VModule General Specification
1. 42” Module
2. 50” XGA Module
3. 50” FHD Module
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Only for training and service purposes
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Specification Remark
42 inch Wide Color Display Module
16:9
PDP42G1####,
RGB Closed Type, Glass Filter
1)Temp. : 0~40deg
2)Humidity : 20~80%
3)Temp. : -20~60deg
4)Humidity : 10~90%
100-240V~, 50/60Hz
PDP
LGE SPEC.
Maker LG
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Specification Remark
50 inch Wide Color Display Module
16:9
PDP50PG1####,
RGB Closed Type, Glass Filter
1)Temp. : 0~40deg
2)Humidity : 20~80%
3)Temp. : -20~60deg
4)Humidity : 10~90%
100-240V~, 50/60Hz
PDP
LGE SPEC.
Maker LG
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Specification Remark
50 inch Wide Color Display Module
16:9
PDP50H2####,
RGB Closed Type, Glass Filter
1)Temp. : 0~40deg
2)Humidity : 20~80%
3)Temp. : -20~60deg
4)Humidity : 10~90%
100-240V~, 50/60Hz
PDP
LGE SPEC.
Maker LG

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Only for training and service purposes
VModel General Specification
Market
Broadcasting system
Receiving system
Scart Jack (2EA)
Video Input (1EA)
S-Video Input (1EA)
Component Input (1EA)
RGB Input(1EA)
HDMI Input(4EA)
Audio Input (3EA
1
2
3
4
5
6
7
8
9
10
No Item Specification Remark
France
1) PAL-BG
2) PAL-DK
3) PAL-I,I’
4) DVB-T(ID TV)
5) SECAM-L/L’
Analog : Upper Heterodyne
Digital : COFDM
PAL, SECAM
PAL, SECAM, NTSC
PAL, SECAM, NTSC
Y/Cb/Cr, Y/Pb/Pr
RGB-PC
HDMI-DTV & SOUND
PC Audio, Component, AV
4 System : PAL, SECAM, NTSC, PAL60
4 System : PAL, SECAM, NTSC, PAL60
L/R Input

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Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application Object
These instructions are applied all of the PLASMA TV,
PD82A Chassis.
2. Note
(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 5 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.
* 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.
3. ADC Calibration
V Auto adjustment Map(RS-232C)
- Baud : 115200bps, RS232 Host : PC, Echo : none.
4. Adjustment of AV Color Balance
4-1.
Standard Equipment
: 802F Pattern Generatorr. Master Pattern Generator(MSPG-
925, etc) or same product.
4-2. Required Equipment
O Remote controller for adjustment.
O MSPG-925FS Pattern Generator. (Which has Video Signal:
7 Color Bar Pattern shown in Fig.1)
-> Model: 202 / Pattern: 65 EC and FC model use PAL-
BGDHI(composite signal)
(1) Input the Video Signal: 7 Color Bar signal into AV3.
(2) Set the PSM to Dynamic mode in the Picture menu.
(3) Press IN-START key on R/C for adjustment.
(4) Press the G(Vol. +) key to operate the set, then it
becomes automatically.
5. Adjustment of Component
5-1. Standard Equipment
: 802F Pattern Generatorr. Master Pattern Generator(MSPG-
925, etc) or same product.
5-2. Required Equipment
O Remote controller for adjustment.
O MSPG-925FS Pattern Generator. (Which has Video Signal:
7 Color Bar Pattern shown in Fig.2)
-> Model: 202 / Pattern: 65 EC and FC model use PAL-
BGDHI(composite signal)
(1) Input the Component 720p/50Hz 7 color Bar
Pattern(MSPG-925FS model : 215, Pattern : 65) signal into
Component.
(2) Set the PSM to Dynamic mode in the Picture menu.
(3) Press IN-START key on R/C for adjustment.
(4) Press the G(Vol. +) key to operate the set, then it
becomes automatically.
(5) Auto-RGB OK means the adjustment is completed.
* Using ‘power on’ button off the control R/C, power on TV.
If you turn on a still screen more than 20 minutes, (Especially
digital pattern, cross hatch pattern) after image may be occur in
the black level part of the screen.
ADC adjust
Data Read
Default Write
Enter
Adjust Mode
ADC adjust
ADC Parameter
Digital Data
ADC Parameter
(Average)
Adjustment
Confirmation
Adjust Mode In
Adjust Mode Off
NO Item Remark CMD1 CMD2 Data 0
A
A
A
A
A
A
A
D
D
D
D
D
D
D
0
0
0
0
0
0
0
1
2
3
4
9
0
9
Transfer 18Byte
(Input resolution Data)
To check ADC Adjusment
on Assembly line
When transger the ‘Mode
In’, Carry the command.
MSPG925FS
Component RGB-PCAVADC
Model : 3
(1024*768 60Hz)
Pattern : 65
7 Color Bar
Model:215(720P)
Pattern : 65
* 720P/50Hz
7 Color Bar
PAL
INPUT SELECT AV3
Model : 202
(PAL-BGDHI)
Pattern : 65
* PAL 7 Color Bar
(Fig.1) 7 color Bar signal
(Fig.2) 7 color Bar signal

6. Adjustment of RGB
6-1. Standard Equipment
: 802F Pattern Generatorr. Master Pattern Generator(MSPG-
925, etc) or same product.
6-2. Required Equipment
O Remote controller for adjustment.
O MSPG-925FS Pattern Generator. (Which has Video Signal:
7 Color Bar Pattern shown in Fig.3)
(1) Input the PC 1024x768@60Hz 7color Bar(MSPG-925,
Model:3, Pattern:65) into RGB.(using D-sub to D-sub cable)
(2) Set the PSM to Dynamic mode in the Picture menu.
(3) Press IN-START key on R/C for adjustment.
(4) Press the G(Vol. +) key to operate To set, then it becomes
automatically.
(5) Auto-RGB OK means the adjustment is completed.
(6) Press the G(Vol. +) key to operate the set, then it
becomes automatically.
(7) Auto-RGB OK means the adjustment is completed.
7. Channel memory Setting Method
: Recovery the channel memory by adjust R/C.
1) Press ADJ key on R/C for adjustment.
2) Press VOL + key on “Channel Recover”.
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 works abnormally, “No CA module” words
display on screen.
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.4
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 RV901, 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 RV951, voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)
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(Fig.3)
* Befor power off, input mode must be changed RF mode.
Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
(Fig.4) Connection diagram of power adjustment for measuring

8. EDID(The Extended Display Identification Data )
/DDC(Display Data Channel) download
8-1. Required Test Equipment
(1) Adjusting PC with S/W for writing EDID Data.
(S/W : EDID TESTER Ver.2.5)
(2) A Jig for EDID Download.
(3) Cable : Serial(9Pin or USB) to D-sub 15Pin cable, D-sub
15Pin cable, DVI to HDMI cable.
8-2. Required Test Equipment
8-3. Preparation for Adjustment
1) As above Fig.5, Connect the Set, EDID Download Jig, PC
& Cable.
2) Turn on the PC & EDID Download Jig. And Execute the
S/W : EDID TESTER Ver,2.5.
3) Set up S/W option.
Repeat Number : 5
Device Address : A0
PageByte : 8
4) Power on the Set.
8-4. Sequence of Adjustment
(1) EDID Download
1) Init the data.
2) Load the EDID data.(Open File).
[ Analog file ] (for RGB)
]
[ Digital file ] (for HDMI)
3) Set the S/W as below.
4)
Push the “Write Data & Verify”button. And confirm “Yes”.
5) If the writing is finished, you will see the “OK” message.
6) If TV has two HDMI, you must download two times for
each HDMI.
8-5. EDID DATA
1) Analog-RGB.
=> Detail EDID Options are below([1],[2],[3],[4],[5])
1.[1]-Product ID
2. [2]-Serial No : Controlled on production line.
3. [3]-Month, Year : Controlled on production line.
ex) Monthly: '03' => '03'
Year : '2006' => '10'
4. [4]-Model Name : model name.
5. [5]-Checksum (7EH) -> Changeable by total EDID data.
- 9 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
(Fig.5) Connection Diagram of DDC download
[1] [2]
[3]
[4] [5]
Open FileOpen File
50PG6500
Product ID
Product IDModel Name EDID table
B19C
Hex
9CB1
40013
50PG6500
00 00 00 FC 00 35 30 50 47 36 35 30 30 0A 20 20 20 20
Model Name Model Name(Hex)

2) HDMI 1.
=> Detail EDID Options are below([1],[2],[3],[4],[5])
1.[1]-Product ID
2. [2]-Serial No : Controlled on production line.
3. [3]-Month, Year : Controlled on production line.
ex) Monthly: '03' => '03'
Year : '2006' => '10'
4. [4]-Model Name : model name.
5. [5]-Checksum (7EH) -> Changeable by total EDID data.
3) HDMI 2.
=> Detail EDID Options are below([1],[2],[3],[4],[5])
* Please refer HDMI 1
- EDID Download is needed HDMI 1~ HDMI 4.
- 10 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
[1] [2]
[3]
[4] [5]
[5]
50PG6500
00 00 00 FC 00 35 30 50 47 36 35 30 30 0A 20 20 20 20
Model Name Model Name(Hex)
50PG6500
Product ID
Product IDModel Name EDID table
B29C
Hex
9CB2
40114
[1] [2]
[3]
[4] [5]
[5]

9. Adjustment of White Balance
9-1. Required Equipment
(1) Remote control for adjustment.
(2) Color Analyzer : CA-100+, CA210 or same product.
- CH : 10
(3) Auto W/B adjustment instrument.(only for Auto adjustment)
(4) AV Pattern Generator.
W Color temperature standards according to CSM and Module.
W CS-1000/CA-100+/CA-210(CH 10) White balance adjustment
coordinate and color temperature.
* PC(for communication through RS-232C)
-> UART Baud rate : 115200 bps
9-2. 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.
9-3. 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)
10. Adjustment of White Balance
(Manual white Balance)
V One of R Gain/ G Gain/ B Gain should be kept on 80, and
others are controlled lowering from 80
(1) Press ‘power on’of the control R/C, set heat run to white
by pressing and heat run over 15 minutes.(Set: RS-232
Host: PC, Baud Rate: 115200bps, Download: Cortez)
(2) Zero Calibrate CA-100+, and stick the sensor to the center
of PDP module surface when you adjust.
(3) Double click In-start key on Controlling R/C and get in
‘white balance’.
(4) Set test-pattern on and display inside pattern. Control is
carried out on three color temperature, COOL, MEDIUM,
WARM. (Control is carried out three times.)
(5) When the R/G/B GAIN is 80 on OSD, it is the FULL
DYNAMIC Range of the Module. In order to control white
balance without the saturation of FULL DYNAMIC Range
and DATA, one of R Gain / G Gain / B Gain should be kept
on 80, and other two is controlled lowering from 80.
* Color Temperature: Cool, Medium, Warm
(1) When R GAIN is set to 80
- Control G GAIN and B GAIN by lowering from 80.
(2) When B GAIN is set to 80
- Control R GAIN and G GAIN by lowering from 80.
(3) When G GAIN is set to 80
- Control R GAIN and B GAIN by lowering from 80.
One of R Gain / G Gain / B Gain should be kept on 80, and
adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL DYNAMIC
Range of Module)
11. 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.
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* 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
Color Coordinate
xy
0.283±0.002
0.293±0.002
0.329±0.00
2
11,000K
9,300K
6,500K
0.000
0.000
0.003
0.276±0.002
0.285±0.002
0.313±0.00
2
COOL
MEDIUM
WARM
CSM Temp uv
(Fig.6) Auto AV(CVBS) Color Balance Test Pattern
Full White Pattern
RS-232C Communication
CA-210
Color
ANALYZER
TYPE : CA-210
Type
Baud Rate
115200
Index
R Gain
G Gain
B Gain
R Offset
G Offset
B Offset
Data bit
8
Cmd1 Cmd2
ja
jb
jc
jd
je
jf
Stop bit
1Parity NONE
PD82A
Protocol
Setting
Data Min Value
00(00)
00(00)
00(00)
00(00)
00(00)
00(00)
Max Value
128(80)
128(80)
128(80)
128(80)
128(80)
128(80)

12. Default Value in Adjustment mode
12-1. Auto Color Balance
12-2. Write Balance
13. EEPROM Data Write
(Serial No D/L)
13-1. Signal TABLE
CMD : A0h
LENGTH : 85~94h (1~16 bytes)
ADH : E2PROM Sub Address high (00~1F)
ADL : E2PROM Sub Address low (00~FF)
Data : Write data
CS :
CMD + LENGTH + ADH + ADL + Data_1 + ... + Data_n
Delay : 20ms
13-2. Command Set
* Description
FOS Default write : <7mode data> write
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0, Phase
Data write : Model Name and Serial Number write in EEPROM,.
13-3. Method & Notice
(1) Serial number D/L is using of scan equipment.
(2) Setting of scan equipment operated by Manufacturing
Technology Group.
(3) Serial number D/L must be conformed when it is produced
in production line, because serial number D/L is mandatory
by D-book 4.0.
14. Set Information
(Serial No& Model name, Option Table)
14-1. Setting up ‘Tool Option1,2’
(After setting white balance, this is set)
(Setting: Press ADJ Key in the Adjust remocon)
(1) Press ADJ Key in the R/C for adjustment.
(2) Insert Option value by a number key.
(3) Press the Enter Button.
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(Fig. 7) Default on OSD
<Component> <RGB>
<AV>
(Fig. 8) Default on OSD
CMD LENGTH ADH ADL DATA_1 DATA_n ... CS DELAY
Model
Name
42PG6500
Tool
Option1
10240 1697 0 14 2 1 192
Tool
Option2
Area
Option
Option1 Option2 Option3 Option4
No
1
EEPROM WRITE A0h 84h+n n-byted Write
(n=1~16)
Adjust mode CMD(hex) LENGTH(hex) Description

14-2. Check the serial number & Model Name
(1) Push the menu button in DTV mode.
- Select the STATION-> Diagno stics -> To set.
(2) Check the Serial Number.
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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. 50” Power Board Structure
(1) Pin Layout
(2) Pin Spec
SC101 P813 P811 P812
AC INLET MAIN BOARD PDP MODULE
AC
NC
AC
YH396-03
16V
GND
12V
GND
5VSC
5VSC
GND
GND
5V_MNT
RL_ON
M5V_ON
M5V_ON
GND
GND
GND
GND
5V_MNT
AC_DET
RL_ON
VS_ON
M5V_ON
AUTO_GND
SMH200-22P
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
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Description
NO

- 16 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
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
Is plug in power cord? Plug in power cord.
Yes
No
Is the Line Filter and Power
Board Cable connected? Connect the Cable.
Yes
No
Is the Fuse(F101) on
Power Board normal? Replace the Fuse.
Yes
No
Is the Power Board and 13P of
VSC Board Cable connected? Connect the Cable.
Yes
No
After the cable connect is removed
to Power Board(except the SC101
connection cable), the AC voltage
marking is authorized on manual.
When ST-BY 5V is not operated,
replace Power Board.

- 17 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
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 X-Board.
Is the output voltage normal after
remove P1, 2, 4, 9, 10 connector of
Ctrl-B/D?
Yes
No Yes
Is the Y-Board
normal?
Is the output voltage
normal after remove
P103 connector of
Y-B/D?
Is the Fuse(FS101,FS102) 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
P1 connector of Z-
B/D?
Is the Fuse (FS1, FS2) 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 P1, 2, 3, 4, 5 connector of
X-B/D?
After remove P1, P2, P3 output voltage
normality: Replace Right X-B/D
After remove P4, P5 output voltage
normality: Replace Left X-B/D
Yes
No Yes
Is the
VSC Board normal? Is the output voltage normal after remove P901?
After crisis COF of each board, check the normality operates.
If in case normality operates, correspondence COF Fail is replace the module.
After remove P901 normal
operation: Replace VSC Board
Yes
No
Is the COF of X, Y, Z
normal ?
No
Yes
Yes

- 18 - 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 P800
No
Is the IC700(FLI8548)
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

- 19 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
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?
Re-insert the Cable inserts.
Yes
No
No
Yes
Does the FIL8548
IC(IC700) Operates ?
Replace FIL8548
IC(IC700)
No
Is the Ctrl Board of
Module normal? Replace Ctrl B/D.
No
No
Yes Replace hte VSC B/D
Replace the cable.
Yes

- 20 - 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 mode
Is the Tuner normal?
Is the CXA2069Q normal?
Is the Tuner Cable connected?
Re-insert the Cable.
Yes
No
No
Yes
Is the FIL8548 normal?
Replace the Tuner.
No
Is the Input voltage, IIC Communication
and CVBS output normal?
Yes
Is the Input voltage, IIC
Communication normal?
No Replace the IC.
No
Is normal the Input voltage, IIC
Communication?
No
Block A
Replace the IC.
No
Is the Video input of the AV
Jack(JK1203)normal?
Yes
Is the CXA2069Q normal?
Check the input source and Cable
No
Is the Input voltage, IIC
Communication normal?
No Replace the IC.
No
Yes
Same as Block A