DOWNLOAD LG 42PG20-UA (CHASSIS:PU84A) Service Manual ↓ Size: 11.75 MB | Pages: 49 in PDF or view online for FREE

Model
42PG20-UA (CHASSIS:PU84A)
Pages
49
Size
11.75 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
42pg20-ua-chassis-pu84a.pdf
Date

LG 42PG20-UA (CHASSIS:PU84A) Service Manual ▷ View online

- 4 -
The specifications shown above may be changed without prior notice for quality improvement.
MODELS
AC100-240V ~ 50/60Hz
NTSC-M, ATSC, 64 & 256 QAM
VHF 2-13, UHF 14-69, CATV 1-135, DTV 2-69, CADTV 1-135
75 ohm
32 ~ 104°F (0 ~ 40°C)
Less than 80%
-4 ~ 140°F (-20 ~ 60°C)
Less than 85%
Dimensions
(Width x Height x Depth)
Weight
Power requirement
Television System
Program Coverage
External Antenna
Impedance
Environment condition
With stand
Without stand
With stand
Without stand
Operating
Temperature
Operating Humidity
Storage Temperature
Storage Humidity
42PG20 (42PG20-UA)
42PG20C (42PG20C-UA)
50PG20 (50PG20-UA)
50PG20C (50PG20C-UA)
MODELS
50PG30
(50PG30F-UA)
60PG30
(60PG30F-UA)
41.3 x 30.2 x 12.2 inches
1048.0 x 766.0 x 310.0 mm
41.3 x 28.1 x 3.3 inches
1048.0 x 713.0 x 83.5 mm
61.7 pounds / 28.0 kg
54.2 pounds / 24.6 kg
48.9 x 34.9 x 14.6 inches
1242.0 x 887.6 x 370.0 mm
48.9 x 32.6 x 3.5 inches
1242.0 x 827.2 x 88.0 mm
86.6 pounds / 39.3 kg
76.3 pounds / 34.6 kg
Dimensions
(Width x Height x Depth)
Weight
With stand
Without stand
With stand
Without stand
48.9 x 34.9 x 14.6 inches
1242.0 x 887.6 x 370.0 mm
48.9 x 32.6 x 3.5 inches
1242.0 x 827.2 x 88.0 mm
86.6 pounds / 39.3 kg
76.3 pounds / 34.6 kg
57.3 x 38.8 x 16.3 inches
1455.0 x 985.0 x 414.0 mm
57.3 x 38.5 x 15.8 inches
1455.0 x 914.8 x 82.8 mm
137.6 pounds / 62.4 kg
127.8 pounds / 58.0 kg
MODELS
50PG60
(50PG60F-UA)
60PG60
(60PG60F-UA)
Dimensions
(Width x Height x Depth)
Weight
With stand
Without stand
With stand
Without stand
48.9 x 34.9 x 14.6 inches
1242.0 x 887.6 x 370.0 mm
48.9 x 32.6 x 3.5 inches
1242.0 x 827.2 x 88.0 mm
86.6 pounds / 39.3 kg
76.3 pounds / 34.6 kg
57.3 x 38.8 x 16.3 inches
1455.0 x 985.0 x 414.0 mm
57.3 x 38.5 x 15.8 inches
1455.0 x 914.8 x 82.8 mm
137.6 pounds / 62.4 kg
127.8 pounds / 58.0 kg
SPECIFICATIONS
- 5 -
ADJUSTMENT INSTRUCTIONS
1. Application Range
This spec. sheet is applied to all of the PU84A 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
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.
Caution : 42PG20-UA must keep 100 ~ 120V, 50/60Hz.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
O
After RGB Full White in HEAT-RUN Mode, the receiver must
be operated prior to the adjustment.
O
Enter into HEAT-RUN MODE
(1) Press the POWER ON KEY on R/C for adjustment.
(2) Press the ADJ KEY on R/C and enter EZ ADJUST
Select “4. White Pattern” by using 
D
/
E
(CH +/-) and press
ENTER(
V
)
Select “White” by using 
F
/
G
(VOL +/-) 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 pattern, cross hatch pattern), an after
image may be occur in the black level part of the
screen.
3. Download
(1) Execute ISP program “Mstar ISP Utility” and then click
“Config” tab.
(2) Set as below, and then click “Auto Detect” and check “OK”
message If display “Error”, Check connect computer, jig,
and set.
(3) Click “Connect” tab. If display “Can’t” , Check connect
computer, jig, and set.
(4) Click “Read” tab, and then load download file(XXXX.bin)
by clicking “Read”
(5) Click “Auto” tab and set as below
(6) Click “Run”.
(7) After downloading, check “OK” message.
- 6 -
4. ADC Process
4-1. PC Input ADC
(1) Auto RGB Gain/Offset Adjustment
1) Convert to PC in Input-source
I2C COMMAND: 0xF4 (SELECT_INPUT) 0x00 0x60
(RGB)
cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT),
0x60(RGB), 0x90(HDMI)
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) 
[gray pattern that left & right is black and center is white
signal (Refer below picture)]. 
3) Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction.
(2) Confirmation
1) We confirm whether “0xB6(RGB)” address of EEPROM
“0xA2” is “0xAA” or not. 
2) If “0xB6(RGB)” address of EEPROM “0xB2” isn’t “0xAA”,
we adjust once more
3) We can confirm the ADC values from
“0xB0~0xB5(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 “0. ADC CALIBRATION “. 
4-2. COMPONENT Input ADC
(1) Component Gain/Offset Adjustment
1) Convert to Component in Input-source
I2C COMMAND : 0xF4 (SELECT_INPUT)  0x00  0x40
(COMPONENT)
cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT),
0x60(RGB), 0x90(HDMI)
2) Signal equipment displays
Impress Resolution  480i
MODEL : 209   in Pattern Generator(480i Mode)
PATTERN : 65  in Pattern Generator(MSPG-925 SERISE) 
3) Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction
4) Signal equipment displays
Impress Resolution  1080i
MODEL : 223   in Pattern Generator(1080i Mode)
PATTERN : 65  in Pattern Generator(MSPG-925 SERISE)
5) Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction
[
Manual ADC process using Service Remocon. After enter
Service Mode by pushing “ADJ” key, execute “ADC Adjust” by
pushing “
G
” key at “0. ADC CALIBRATION”. 
ADJUSTMENT INSTRUCTIONS
Adjustment pattern (RGB, COMPONENT)
- 7 -
4-3. Confirmation
(1) We confirm whether “0xBF(480i)/0xC8(1080i)” address of
EEPROM “0xA2” is “0xAA” or not. 
(2) If “0xBF(480i)/0xC8(1080i)” address of EEPROM “0xA2”
isn’t “0xAA”, we adjust once more
(3) We can confirm the ADC values from “0xB9 ~ 0xBE(480i) /
0xC2 ~ (1080i)” addresses in a page “0xA2”
[
Manual ADC Confirmation using Service Remocon. After enter
Service Mode by pushing “INSTART” key.
Caution: Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP
Module, especially be careful)
Caution: Set up “RF mode(noise)” before voltage adjustment.
5. POWER PCB Ass’y Voltage 
Adjustment
(Va, Vs voltage Adjustment)
5-1. Test Equipment:
D.M.M 1EA
5-2. Connection Diagram for Measuring
Refer to Fig.1, Fig 2
5-3. Adjustment Method 
(1) 50” Va Adjustment (refer fig.1)
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M. to Va pin of P802,
connect-terminal to GND pin of P802.
3) After turning VR902,voltage of D.M.M adjustment as
same as Va voltage which on label of panel right/top
(deviation; ±0.5V)
(2) 50” Vs Adjustment (refer fig.1)
1) Connect + terminal of D.M.M. to Vs pin of P802, connect
-terminal to GND pin of P802.
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)
(3) 42” Va Adjustment (refer fig.2)    
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)
(4) 42” Vs Adjustment (refer fig.2)
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)
ADJUSTMENT INSTRUCTIONS
(Fig. 1) 50inch Power PCB Assy Voltage Adjustment
(Fig. 2) 42inch Power PCB Assy Voltage Adjustment
Page of 49
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LG 42PG20-UA (CHASSIS:PU84A) Service Manual ▷ Download

  • DOWNLOAD LG 42PG20-UA (CHASSIS:PU84A) Service Manual ↓ Size: 11.75 MB | Pages: 49 in PDF or view online for FREE
  • Here you can View online or download the Service Manual for the LG 42PG20-UA (CHASSIS:PU84A) in PDF for free, which will help you to disassemble, recover, fix and repair LG 42PG20-UA (CHASSIS:PU84A) Plasma. Information contained in LG 42PG20-UA (CHASSIS:PU84A) Service Manual (repair manual) includes:
  • Disassembly, troubleshooting, maintenance, adjustment, installation and setup instructions.
  • Schematics, Circuit, Wiring and Block diagrams.
  • Printed wiring boards (PWB) and printed circuit boards (PCB).
  • Exploded View and Parts List.