LG 50PG2000 User manual

PLASMA TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : PD83A
MODEL : 50PG2000 50PG2000-ZA
website: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............................................................................14
BLOCK DIAGRAM...................................................................................23
EXPLODED VIEW .................................................................................. 25
SVC. SHEET ...............................................................................................
PRINTED CIRCUIT DIAGRAM....................................................................

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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
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 50” PLASMA TV used PD83A 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
VModule Specification
(1) 42”
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
PDP42XG####,
RGB Closed Type, Film 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
Chassis
PD83A 42PG10/20/3000
50PG10/20/3000
60PG3000
UK, German, Italy, France, Sweden, Finland, Spain,
Netherlands, Belgium, Luxembourg, Greece, Denmark,
Czech, Austria, Poland, Portugal, Norway, Rumania,
Hungary, Bulgaria,Coratia, Serbia, Swiss, Slovenia,
Russia
LG
Model Name Market Brand Remark
42PG10/20/3000
50PG10/20/3000
60PG3000
Safety : IEC/EN60065
EMI : EN55013
EMS : EN55020
UK, German, Italy, France, Sweden, Finland, Spain,
Netherlands, Belgium, Luxembourg, Greece, Denmark,
Czech, Austria, Poland, Portugal, Norway, Rumania,
Hungary, Bulgaria,Coratia, Serbia, Swiss, Slovenia,
Russia
Model ApplianceMarket
TEST
Remark

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Only for training and service purposes
(2) 50”
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
PDP50XG####,
RGB Closed Type, Film 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
(3) 60”
Display Screen Device
Aspect Ratio
PDP Module
Operating Environment
Storage Environment
Input Voltage
1
2
3
4
5
6
No Item Specification Remark
60 inch Wide Color Display Module
16:9
PDP60X7####,
RGB Closed Type, Film 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
HDMI Input(3EA)
Audio Input (3EA)
1
2
3
4
5
6
7
8
9
10
No Item Specification Remark
UK, German, Italy, France, Sweden, Finland, Spain,
Netherlands, Belgium, Luxembourg, Greece, Denmark,
Czech, Austria, Poland, Portugal, Norway, Rumania,
Hungary, Bulgaria,Coratia, Serbia, Swiss, Slovenia, Russia
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
Analog Only
4 System : PAL, SECAM,NTSC,PAL60
4 System : PAL, SECAM,NTSC,PAL60
SPEC OUT FOR 42/50PG1000
SPEC OUT FOR 42/50PG1000
1EA HDMI FOR 42/50PG1000
L/R Input

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Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application Range
This spec sheet is applied all of the PDP TV, PD83A chassis.
2. Specification.
(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 when module is in the circumstance of over
15°
- In case of keeping module is in the circumstance of 0°C,
it should be placed in the circumstance of above 15°C for
2 hours
- In case of keeping module is in the circumstance of below
-20°C, it should be placed in the circumstance of above
15°C for 3 hours,.
OAfter RGB Full White in HEAT-RUN Mode, the receiver
must be operated prior to the 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 (WHITE) of HEAT RUN MODE uses to
check panel.
Caution: If you turn on a still screen more than 20 minutes
(Especially digital pattern, cross hatch pattern), an
after image may be occur in the black level part of the
screen.
Caution: Using ‘power on’ button of the control R/C, power on
TV.
3. ADC Calibration Protocol (RS232)
- Baud rate :115200 bps
- RS232 Host : PC
- echo : none
4. ADC Adjustment
4-1. Adjustment of RGB
(1) Auto RGB Gain/Offset Adjustment
1) Convert to PC in Input-source (refer to I2C command)
2) Signal equipment displays
Output Voltage: 700 mVp-p
Impress Resolution XGA (1024 x 768 @ 60Hz)
Model : 60 in Pattern Generator
Pattern : 65 in Pattern Generator (MSPG-925 SERISE)
3) Adjust by commanding AUTO_COLOR_ADJUST
(2) Confirmation
1) We confirm whether “0xAA (RGB)” address of EEPROM
“0xA2” is “0xAA” or not.
2) If “0xAA (RGB)” address of EEPROM “0xA2” isn’t “0xAA”,
we adjust once more
3) We can confirm the ADC values from “0xA4~0XA9 (RGB)”
addresses in a page “0xA2”
* Manual ADC process using Service Remocon. After enter
Service Mode by pushing “ADJ” key, execute “ADC Adjust”
by pushing “G” key at “ADC CALIBRATION: RGB-C”
4-2. COMPONENT input ADC
(1) Component Gain/Offset Adjustment
1) Convert to Component in Input-source (refer to I2C
command)
2) Signal equipment displays
Impress Resolution 480i
MODEL: 209 in Pattern Generator(480i Mode)
PATTERN : 65 in Pattern Generator( MSPG-925 SERISE)
Impress Resolution 1080i
MODEL: 223 in Pattern Generator(1080i Mode)
PATTERN: 65 in Pattern Generator( MSPG-925 SERISE)
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 Out
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
Transfer 18Byte
(Input resolution Data)
To check ADC Adjustment
on Assembly line
When transfer the ‘Mode
In’, Carry the command.
MSPG925FS
Component RGB-PCADC Model : 60
(1024*768 60Hz)
Pattern : 65
Model : 209(480i 60Hz)
223(1080i 60Hz)
Pattern : 65

(2) Confirmation
1) We confirm whether “0xB3 (480i)/0xBC (1080i)” address of
EEPROM “0xA2” is “0xAA” or not.
2) If “0xB3 (480i)/0xBC(1080i)” address of EEPROM “0xA2”
isn’t “0xAA”, we adjust once more
3) We can confirm the ADC values from “0xAD~0XB2
(480i)/0XB6~BB (1080i)” addresses in a page “0xA2”
* Manual ADC process using Service Remocon. After enter
Service Mode by pushing “ADJ’ key, execute “ADC Adjust”
by pushing “G” key at “ADC CALIBRATION :COMPONENT”.
Caution: Each PCB assembly must be checked by check JIG
set.
(Because power PCB Assembly damages to PDP
Module, especially be careful)
5. POWER PCB Assembly Voltage
Adjustment(Va, Vs voltage Adjustment)
5-1. Test Equipment:D.M.M 1EA
5-2. Connection Diagram for Measuring:
Refer to fig.1
5-3. Adjustment Method
Before Voltage ADJ, do HEAT RUN on 100% Full White
Pattern. (or RF(ATV) Noise Pattern)
(1) 42” EAY39333001 Va Adjustment (refer fig.1)
1) Connect + terminal of D. M..M. to Va pin of P811, connect -
terminal to GND pin of P811.
2) 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) 42” EAY39333001 Vs Adjustment (refer fig.1)
1) Connect + terminal of D. M..M. to Vs pin of P811, connect -
terminal to GND pin of P811.
2) After turning VR951, voltage of D.M.M adjustment as same
as Vs voltage which on label of panel right/top (deviation ;
±0.5V)
(3) 50” EAY39190301 Va Adjustment (refer fig.1)
1) Connect + terminal of D. M.M. to Va pin of P811, connect -
terminal to GND pin of P811.
2) After turning VR901,voltage of D.M.M adjustment as same
as Va voltage which on label of panel right/top (deviation;
±0.5V)
(4) 50” EAY39190301 Vs Adjustment (refer fig.1)
1) Connect + terminal of D. M..M. to Vs pin of P811, connect
-terminal to GND pin of P811.
2) After turning VR951, voltage of D.M.M adjustment as same
as Vs voltage which on label of panel right/top (deviation ;
±0.5V)
(5) 42” EAY43509401 Va Adjustment (refer fig.1)
1) Connect + terminal of D. M.M. to Va pin of P11, connect -
terminal to GND pin of P11.
2) After turning VR951,voltage of D.M.M adjustment as same
as Va voltage which on label of panel right/top (deviation;
±0.5V)
(6) 42” EAY43509401 Vs Adjustment (refer fig.1)
1) Connect + terminal of D. M..M. to Vs pin of P11, connect -
terminal to GND pin of P11.
2) After turning VR901, voltage of D.M.M adjustment as same
as Vs voltage which on label of panel right/top (deviation ;
±0.5V)
(7) 60” EAY41410101 Vs Adjustment (refer fig.1)
1) Connect + terminal of D. M.M. to Va pin of P816, connect -
terminal to GND pin of P816.
2) After turning VR901,voltage of D.M.M adjustment as same
as Va voltage which on label of panel right/top (deviation;
±0.5V)
(8) 60” EAY41410101 Vs adjustment (refer fig.1)
1) Connect + terminal of D. M..M. to Vs pin of P816, connect -
terminal to GND pin of P816.
2) After turning VR951, voltage of D.M.M adjustment as same
as Vs voltage which on label of panel right/top (deviation ;
±0.5V)
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Only for training and service purposes
<42 inch EAY39333001>
<42 inch EAY43509401>

(Fig. 1) Connection Diagram of Power Adjustment for Measuring.
6. EDID(The Extended Display Identification Data )
/DDC(Display Data Channel) Download
6-1. 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.
6-2. Setting of Device
6-3. Preparation for Adjustment
(1) Connect the Set, EDID Download Jig,, PC & Cable
(2) Turn on the PC & EDID Download Jig. Set up the S/W
option
(3) Power on the Set
6-4. Sequence of Adjustment(EDID Download)
(1) Init the data
(2) Load the EDID data.(Open File).
(3) Set the S/W to download.
(4) Push the “Write Data & Verify” button. And confirm “Yes”
(5) If the writing is finished, you will see the “OK” message.
* If TV has three HDMI INPUT, Please separate each INPUT
(Each EDID DATA is different.)
7. Download Serial Number (RS-232C)
(1) Press “Power on” key of service R/C.(Baud rate: 115200
bps)
(2) Connect RS232 Signal Cable to RS-232 Jack.
(3) Write Serial number by use RS-232.
(4) Must check the serial number at the Diagnostics of SET
UP menu.
(Refer to below ‘6.SET INFORMATION’).
8. EDID DATA
(1) Analog RGB
ODetail EDID Options are below (ⓐ, ⓑ, ⓒ, ⓓ, ⓔ)
ⓐProduct ID
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<50 inch EAY39190301>
<60 inch EAY41410101>
(Fig. 2) Connection Diagram of DDC Download

ⓑSerial No
=> Controlled on production line
ⓒMonth, Year
=> Controlled on production line:
ex) Week: ‘03’ -> ‘03’
Year: ‘2006’ -> ‘10’
ⓓModel Name(Hex)
ⓔChecksum
=> Changeable by total EDID data
(2) HDMI_1
ODetail EDID Options are below (ⓐ, ⓑ, ⓒ, ⓓ, ⓔ)
ⓐProduct ID
ⓑSerial No
=> Controlled on production line
ⓒMonth, Year
=> Controlled on production line:
ex) Week: ‘03’ -> ‘03’
Year: ‘2006’ -> ‘10’
ⓓModel Name(Hex)
ⓔChecksum
=> Changeable by total EDID data
(3) HDMI_2
ODetail EDID Options are below (ⓐ, ⓑ, ⓒ, ⓓ, ⓔ)
=> Please refer HDMI_1(Not apply 42/50PG1000-ZA)
(4) HDMI_3
ODetail EDID Options are below (ⓐ, ⓑ, ⓒ, ⓓ, ⓔ)
=> Please refer HDMI_1(Not apply 42/50PG1000-ZA)
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