LG 50PG60D User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PE81A
MODEL : 50PG60D 50PG60D-GE
website:htt ://biz.LGservice.com
Internal Use Only

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Only or training and service purposes
CONTENTS
CONTENTS .............................................................................................. 2
SAFETY PRECAUTIONS ..........................................................................3
SPECIFICATION ........................................................................................4
ADJUSTMENT INSTRUCTION .................................................................6
TROUBLE SHOOTING ............................................................................13
BLOCK DIAGRAM...................................................................................22
EXPLODED VIEW .................................................................................. 24
SVC. SHEET ...............................................................................................
PRINTED CIRCUIT DIAGRAM ....................................................................

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Only or training and service purposes
SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special sa ety-related characteristics. These parts are identi ied by in the
Schematic Diagram and Replacement Parts List.
It is essential that these special sa ety parts should be replaced with the same components as recommended in this manual to prevent
X-RADIATION, Shock, Fire, or other Hazards.
Do not modi y the original design without permission o manu acturer.
G n ral Guidanc
An isolation Transform r should always b us d during the
servicing o a receiver whose chassis is not isolated rom the AC
power line. Use a trans ormer o adequate power rating as this
protects the technician rom accidents resulting in personal injury
rom electrical shocks.
It will also protect the receiver and it's components rom being
damaged by accidental shorts o the circuitry that may be
inadvertently introduced during the service operation.
I any use (or Fusible Resistor) in this monitor is blown, replace it
with the speci ied.
When replacing a high wattage resistor (Oxide Metal Film Resistor,
over 1W), keep the resistor 10mm away rom PCB.
Keep wires away rom high voltage or high temperature parts.
Due to high vacuum and large sur ace area o picture tube,
extreme care should be used in handling th Pictur Tub .
Do not li t the Picture tube by it's Neck.
L akag Curr nt Cold Ch ck(Ant nna Cold Ch ck)
With the instrument AC plug removed rom AC source, connect an
electrical jumper across the two AC plug prongs. Place the AC
switch in the on position, connect one lead o 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.
I the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1MΩ and 5.2MΩ.
When the exposed metal has no return path to the chassis the
reading must be in inite.
An other abnormality exists that must be corrected be ore the
receiver is returned to the customer.
L akag Curr nt Hot Ch ck (S b low Figur )
Plug the AC cord directly into the AC outlet.
Do not us a lin Isolation Transform r during this ch ck.
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 or 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 o the limits speci ied, there is
possibility o shock hazard and the set must be checked and
repaired be ore it is returned to the customer.
L akag Curr nt Hot Ch ck 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

SPECIFICATIONS
NOTE : Speci ications and others are subject to change without notice or improvement .
VApplication Rang
This spec is applied to the 50” PLASMA TV used PE81A Chassis.
V Sp cification
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 o each product is marked by models.
4) Speci ication and per ormance o each parts are ollowed each drawing and speci ication by part number in accordance with SBOM.
5) The receiver must be operated or about 20 minutes prior to the adjustment.
VT st M thod
1) Per ormance : LGE TV test method ollowed.
2) Demanded other speci ication
Sa ety : CE, IEC speci ication
EMC : CE, IEC
VG n ral Sp cification ( 50” Modul )
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Speci ication Remark
50” Wide Color Display Module
16:9
PDP50PG1,
RGB Closed Type
1)Temp. : 0~40deg
2)Humidity : 20~80%
1)Temp. : -20~60deg
2)Humidity : 10~90%
100-240V~, 50/60Hz
Plasma Display Panel
LGE SPEC.
Maker : LGIT, Sansung Sanken
Chassis
PE81A 50PG60D-GA(GE) Singapore LG
Model Name Market Brand Remark
50PG60D-GA(GE) Sa ety : IEC/EN60065, EMI : EN55013, EMS : EN55020Singapore
Model ApplianceMarket
TEST
Remark

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Only or training and service purposes
Market
Broadcasting system
Receiving system
Video Input (1EA)
S-Video Input (1EA)
Component Input (1EA)
RGB Input(1EA)
HDMIInput(4EA)
Audio Input (3EA)
1
2
3
4
5
6
7
8
9
No Item Speci ication Remark
Singapore, South A rica
1) PAL - BG
2) DVB-T(ID TV)
Analog : Upper Heterodyne
Digital : COFDM
PAL, SECAM, NTSC
PAL, SECAM, NTSC
Y/Cb/Cr, Y/Pb/Pr
RGB-PC
HDMI-DTV & SOUND
PC Audio, Component, AV
4System : PAL, SECAM, NTSC, PAL60
4System : PAL, SECAM, NTSC, PAL60
L/R Input
V Mod l Sp cification

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ADJUSTMENT INSTRUCTION
1. Application Obj ct
These instructions are applied all o the 50” PLASMA TV,
PE81A Chassis.
2. Not
(1) Because this is not a hot chassis, it is not necessary to use
an isolation trans ormer. However, the use o isolation
trans ormer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be per ormed in the circumstance o
25±5°C o temperature and 65±10% o relative humidity i
there is no speci ic designation.
(4) The input voltage o the receiver must keep 100-240V~,
50/60Hz.
(5) The receiver must be operated or about 5 minutes prior to
the adjustment.
OA ter 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 or 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) o HEAT-RUN
mode uses to check PANEL.
3. ADC Calibration
V Auto adjustment Map(RS-232C)
- Baud : 115200bps, RS232 Host : PC, Echo : none.
4. Adjustm nt of AV(CVBS)
4-1.
Standard Equipm nt
: 802F Pattern Generatorr. Master Pattern Generator(MSPG-
925, etc) or same product.
4-2. R quir d Equipm nt
O Remote controller or 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 or adjustment.
(4) Press the G(Vol. +) key to operate the set, then it becomes
automatically.
5. Adjustm nt of Compon nt
5-1. Standard Equipm nt
: 802F Pattern Generatorr. Master Pattern Generator(MSPG-
925, etc) or same product.
5-2. R quir d Equipm nt
O Remote controller or adjustment.
O MSPG-925FS Pattern Generator. (Which has Video Signal:
7 Color Bar Pattern shown in Fig.2)
-> Model: 215 / 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 or 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 o the control R/C, power on TV.
I you turn on a still screen more than 20 minutes, (Especially
digital pattern, cross hatch pattern) a ter image may be occur in
the black level part o the screen.
ADC adjust
Data Read
De ault Write
Enter
Adjust Mode
ADC adjust
ADC Parameter
Digital Data
ADC Parameter
(Average)
Adjustment
Con irmation
Adjust Mode In
Adjust Mode O
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
9
0
0
1
2
3
4
9
0
9
Trans er 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. Adjustm nt of RGB
6-1. Standard Equipm nt
: 802F Pattern Generatorr. Master Pattern Generator(MSPG-
925, etc) or same product.
6-2. R quir d Equipm nt
O Remote controller or 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 or 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. Chann l m mory S tting M thod
: Recovery the channel memory by adjust R/C.
1) Press ADJ key on R/C or adjustment.
2) Press VOL + key on “Channel Recover”.
9. POWER PCB Assy Voltag
Adjustm nts (Va, Vs Voltage adjustments)
9-1. T st Equipm nt : D.M.M. 1EA
9-2.Conn ction Diagram for M asuring
: re er to Fig.4
9-3. Adjustm nt M thod
(1) Va Adjustm nt
1) A ter receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal o D.M.M to Va pin o P811, connect
- terminal to GND pin o P811.
3) A ter turning RV901, voltage o D.M.M adjustment as
same as Va voltage which on label o panel right/top.
(Deviation; ±0.5V)
(2) Vs Adjustm nt
1) Input signal : RF noise signal.
2) Connect + terminal o D.M.M to Vs pin o P811, connect
– terminal to GND pin o P811.
3) A ter turning RV951, voltage o D.M.M adjustment as
same as Va voltage which on label o panel right/top.
(Deviation; ±0.5V)
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(Fig.3)
Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be care ul)
(Fig.4) Connection diagram o power adjustment or measuring

8. EDID(Th Ext nd d Display Id ntification Data )
/DDC(Display Data Chann l) download
8-1. R quir d T st Equipm nt
(1) Adjusting PC with S/W or writing EDID Data.
(S/W : EDID TESTER Ver.2.5)
(2) A Jig or EDID Download.
(3) Cable : Serial(9Pin or USB) to D-sub 15Pin cable, D-sub
15Pin cable, DVI to HDMI cable.
8-2. R quir d T st Equipm nt
8-3. Pr paration for Adjustm nt
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 V r,2.5.
3) Set up S/W option.
R p at Numb r : 5
D vic Addr ss : A0
Pag Byt : 8
4) Power on the Set.
8-4. S qu nc of Adjustm nt
(1) EDID Download
1) Init the data.
2) Load the EDID data.(Open File).
[ Analog ile ] ( or RGB)
]
[ Digital ile ] ( or HDMI)
3) Set the S/W as below.
4)
Push the “Write Data & Veri y”button. And con irm “Yes”.
5) I the writing is inished, you will see the “OK” message.
6) I TV has two HDMI, you must download two times or
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(Hex)
5. [5]-Checksum : Changeable by total EDID data.
2) HDMI.
=> Detail EDID Options are below([1],[2],[3],[4],[5],[6])
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
5. [5]-Checksum : Changeable by total EDID data.
6. [6]-Physical address :
ex)HDMI1 10, HDMI2 : 20~HDMI4 : 40
- EDID Download is needed HDMI1~HDMI4.
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(Fig.5) Connection Diagram o DDC download
[1][2]
[3]
[4]
[5]
50PG60D
Product ID
Product IDModel Name EDID table
D6C3
Hex
C3D6
50134
50PG60D
Product ID
Product IDModel Name EDID table
D7C3
Hex
C3D7
50135
50PG60D
00 00 00 FC 00 35 30 50 47 36 30 44 0A 20 20 20 20 20
Model Name Model Name(Hex)
[1][2]
[3]
[4][5]
[5]
42PG60D
00 00 00 FC 00 35 30 50 47 36 30 44 0A 20 20 20 20 20
Model Name Model Name(Hex)

9. Adjustm nt of Whit Balanc
9-1. R quir d Equipm nt
(1) Remote control or adjustment.
(2) Color Analyzer (CA-1000, CA-100,100+, CA210 or same
product.) : CH 10(PDP)
* Please adjust CA-210, CA-100+ by CS-1000 be ore
measuring
(3) Auto W/B adjustment instrument.(only or Auto adjustment)
(4) AV Pattern Generator.
(5) 15Pin D-Sub Jack(RGB) is connected to the AUTO W/B
Equipment.
9-1. R quir d Equipm nt
Adjust Process will start by execute I2C Command(Inner
pattern (0xF3, 0xFF)
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( or communication through RS-232C)
-> UART Baud rate : 115200 bps
9-3. Manual W/B Proc ss
(Using adjusts R mot control)
(1) A ter enter Service Mode by pushing “ADJ” key.
(2) Enter White Pattern o o service mode, and change
o -> on.
(3) Enter “W/B ADJUST” by pushing “ G ” key at “3.W/B ADJUST”.
9-4. Conn ction Pictur of th M asuring
Instrum nt(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 o White-Balance, the pattern will come out.
9-5. Auto-control int rfac and dir ctions
(1) Adjust in the place where the in lux o light like loodlight
around is blocked.(illumination is less than 10ux)
(2) Measure and adjust a ter sticking the Color Analyzer(CA-
100+, CA210) to the side o the module.
(3) Aging time
- A ter ajing start, keep the power on(no suspension o
power supply) and heat-run over 15minutes.
- keep white pattern using inside pattern.
V Auto adjustm nt Map(I2C)
- I2C(100K BPS)
10. Communication START
* Until ACK BIT goes LOW, Repeat it.
11. Command form
V Command orm use DDC2AB standard communication
protocol.
1. LEN : DATA BYTE number to send.
2. CMD : Command language that monitor executes.
3. VAL : FOS DATA
4. CS : Dada’s CHECKSUM that transmit.
5. DELAY : 50MS
6. A : Acknowledge.
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* Be or adjusting White-balance, the AV ADC should be done.
I 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
START 6E A 50 A LEN A03A CMD A00A VAL A CS A STOP
START 6E A STOP 50Ms

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12. EEPROM DATA READ
12-1. Singl TABLE
12-2. Command S t
* To read the appointment Address o E2PROM by 128(80h)-
byte
13. EEPROM Data Writ (S rial No D/L)
13-1. Signal TABLE
CMD : 8Eh
LENGTH : 84h+bytes
ADH : E2PROM Slave Address(A0,A2,A4,A6,A8)
Not 00h(Reserved by Bu er To EEPROM)
ADL : E2PROM Sub Address low (00~FF)
Data : Write data
CS :
CMD + LENGTH + ADH + ADL + Data_1 + ... + Data_n
13-2. Command S t
* Description
FOS De ault 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. M thod & Notic
(1) Serial number D/L is using o scan equipment.
(2) Setting o scan equipment operated by Manu acturing
Technology Group.
(3) Serial number D/L must be con ormed when it is produced
in production line, because serial number D/L is mandatory
by D-book 4.0.
14. S t Information
(S rial No& Mod l nam , Option Tabl )
14-1. S tting up ‘Tool Option1,2’
(Aft r s tting whit balanc , this is s t)
(Setting: Press ADJ Key in the Adjust remocon)
(1) Press ADJ Key in the R/C or adjustment.
(2) Insert Option value by a number key.
(3) Press the Enter Button.
14-2. Ch ck th s rial numb r & Mod l Nam
(1) Push the menu button in DTV mode.
- Select the STATION-> Diagno stics -> To set.
(2) Check the Serial Number.
Delay 100ms
128Bytes
E7 A0
A2
A4
A6
0
80
0
80
0
80
0
80
0-page 0~7F Read
0-page 80~7F Read
1-page 0~7F Read
1-page 80~7F Read
2-page 0~7F Read
2-page 80~7F Read
3-page 0~7F Read
3-page 80~7F Read
EEPROM READ
1
2
3
4
5
6
7
8
No. Adjustment
contents
CMD
(hex)
ADH
(hex)
ADL
(hex) Details
CMD LENGTH ADH ADL DATA_1 DATA_n ... CS DELAY
No
1
2
EEPROM WRITE E8 94
84+n
16-Byte Write
n-Byte Write
Adjust mode CMD(hex) LENGTH(hex) Description
Model
Name
42PG60D
Tool
Option1
2244 3329 0 14 14 1 192
Tool
Option2
Area
Option
Option1 Option2 Option3 Option4

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FACTORY ON
FACTORY OFF
EEPROM ALL INIT.
EEPROM Read
EEPROM Write
COLOR SAVE
(R/G/B cuto , Drive,
Contrast, Bright)
H POSITION
V POSITION
CLOCK
PHASE
R DRIVE
G DRIVE
B DRIVE
R CUTOFF
G CUTOFF
B CUTOFF
BRIGHT
CONTRAST
AUTO_COLOR_ADJUST
CHANGE_COLOR_TEMP
White Pattern
AUTO_INPUT CHANGE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
No Adjustment Contents CMD(hex) ADR VAL[HEX] Description
E0
E2
E4
E7
E8
EB
20
30
90
92
16
18
1A
80
82
84
10
12
F1
F2
F3
F4
00
00
00
00
00
00
00
00
00
00
00 : cool
01: medium
02 : warm
00 : cool
01 : medium
02 : warm
00 :cool
01: medium
02: warm
00
00
00
00
00
00
00
00
00
00
00
00
00
data
00
00 - 64
00 - 64
00 - 64
00 - 64
00 - 80
00 - 80
00 - 80
00 - 7F
00 - 7F
00 - 7F
00 - 3F
00 - 64
02
0,1,2,3
00,FF
0,10,20,30,
40,60,90
Factory mode on
Factory mode o
EEPROM All clear
EEPROM Read
EEPROM Write by some values
Color Save
They have di erent range each mode,
FOS Adjustment
Drive adjustment
O set adjustment
Bright adjustment
Luminance adjustment
Auto COLOR Adjustment
0 : Cool
1 : Medium
2 : Warm
3 : User
00: White pattern o
FF: White pattern on
0 : TV
10 : DTV
20 : SCART1
30 : SCART2
40 : Component
60 : RGB
90 : HDMI
15. Adjustm nt Command(LENGTH=84)

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16. SET factoring condition
(1) This adjustment is setting actory shipment mode.
(2) Push the IN-STOP key o adjustment remote controller be ore the actory shipment.
1
2
3
4
5
6
7
System
Storage From
Start
Storage
System
Band
Channel
Fine
Search
Name
To Set
Start
UHF CH.21
To Set
o
On
On
To Set
Vivid
To Set
To Start
Standard
O
0
On
Input : Dolby digital
Output : Bitstream
— : —
O
O
O
Disable
English
Singapore
O
Parental Guidance O
Key Lock O
On
Set ID 1, Factory Reset OK,
ISM Method Normal, Low Power O
Variable by each mode
Variable by each mode
Variable by each mode
16:9
Variable by each mode
Disable
Disable
Disable
DTV Mode
Disable
BG
1
G
1
BG
V/UHF
69
Item SettingNo
Remarks
SETUP Auto Tuning
(ATV)
Manual Tuning
Programme Edit
SETUP Auto Tuning
(DTV) Manual Tuning
Programme Edit
5V Antenna Power
Booster
So tware Update
Diagnostics
PICTURE Picture Mode
Colour Temperature
XD
Advanced
Picture Reset
XD Demo
AUDIO Sound Mode
Auto Volume
Balance
TV Speaker
Digital Audio
TIME Clock
O Time
On Time
Auto Sleep
Time Zone
OPTION Language
Country
Lock System
Parental Control
Input Label
SIMPLINK
Factory Mode
SCREEN Auto Con ig.
Manual Con ig.
XGA Mode
Aspect Ratio
Reset

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TROUBLE SHOOTING GUIDE
1. Pow r Board
1-1. Th whol flowchart which it follows in voltag output stat
Start check
Manu acture enterprise
meaning o a passage
1. Check the Power O
condition.
Doesn't the
screen whole come
out?
Is it identical
with Power O
condition?
Yes
Yes
No
No
No
No
No
2. Check the Inter ace
signal condition.
Is the Inter ace
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

- 14 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only or training and service purposes
1-2. 50” Pow r Board Structur
(1) Pin Layout
(2) Pin Sp c
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
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Description
NO

- 15 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only or training and service purposes
2. No Pow r
(1) Symptom
1) Doesn’t minute discharge at module.
2) Non does not come in into the ront LED.
(2) Ch ck 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 o
VSC Board Cable connected? Connect the Cable.
Yes
No
A ter 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.

- 16 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only or training and service purposes
3. Prot ct Mod
(1) Symptom
1) A ter once shining, it does not discharge minutely
rom module.
2) The Rely alls.(The sound is audible “click”)
3) It is converted with the color where the ront LED
is red rom green.
(2) Ch ck 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.
A ter connecting well each connector,
the normality it operates?
Yes
No Yes
Is the Ctrl Board
normal?
Replace
X-Board.
Is the output voltage normal a ter
remove P1, 2, 4, 9, 10 connector o
Ctrl-B/D?
Yes
No Yes
Is the Y-Board
normal?
Is the output voltage
normal a ter remove
P103 connector o
Y-B/D?
Is the Fuse(FS101,FS102) on Y-B/D
normal?(In case o open is replace)
Yes
No Yes Yes
Replace
Z-Board.
Is the Z-Board
normal?
Is the output voltage
normal a ter remove
P1 connector o Z-
B/D?
Is the Fuse (FS1, FS2) on Z-B/D
normal? (In case o open is replace)
Yes
No Yes
Is the X- Board
normal?
Is the output voltage normal a ter
remove P1, 2, 3, 4, 5 connector o
X-B/D?
A ter remove P1, P2, P3 output voltage
normality: Replace Right X-B/D
A ter remove P4, P5 output voltage
normality: Replace Le t X-B/D
Yes
No Yes
Is the
VSC Board normal?
Is the output voltage normal a ter
remove P901?
A ter crisis COF o each board, check the normality operates.
I in case normality operates, correspondence COF Fail is replace the module.
A ter remove P901 normal
operation: Replace VSC Board
Yes
No
Is the COF o X, Y, Z
normal ?
No
Yes
Yes

- 17 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only or 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 Rast r
(1) Symptom
1) No OSD and image occur at screen.
2) It maintains the condition where the ront LED is green.
(2) Ch ck following

- 18 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only or training and service purposes
5. In cas of occurring strang scr n into sp cific mod
5-1. In cas th OSD do s not display d
(1) Symptom
1) LED is green.
2) The minute discharged continuously becomes Accomplished rom module.
(2) Ch ck 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 o
Module normal? Replace Ctrl B/D.
No
No
Yes
Replace hte VSC B/D
Replace the cable.
Yes

- 19 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only or training and service purposes
5-2. In cas of do s’t display th scr n into sp cific mod
(1) Symptom
1) The screen does not become the display rom speci ic input mode
(RF, AV, Component, RGB, DVI).
(2) Ch ck following
1) Check the all input mode should become normality display .
(3) In cas of b com s unusual display from RF mod
(4) In th cas of b com s unusual display from sid S-vid o/AV mod
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 o 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

- 20 - LGE Internal Use OnlyCopyright©2008 LG Electronics. Inc. All right reserved.
Only or training and service purposes
(5) In th cas of b com s unusual display from Compon nt, RGB mod
(6) In th cas of b com s unusual display from HDMI mod
(7) In th cas of b com s unusual display from SCART1 mod
(8) In th cas of b com s unusual display from SCART2 mod
Is theR,G,B input and H,V
Sync o the J1100 normal? Check the input source
No
Is the HDMI(IC1000)
normal?
Yes
Same as Block A
Is the Input and Output signal,IIC
Communication normal?
No
Is the Video input od A/V
Jack(J1200) normal?
Yes
Same as Block A
Check the input source
No
Replace the IC.
No
Is the Video input od A/V
Jack(J1201) normal?
Yes
Same as Block A
Check the input source
No
Yes
Same as Block A