LG Z42PQ20-UC (CHASSIS:PU92B) Service Manual ▷ View online
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SPECIFICATIONS
V
General Specification
No.
1
2
3
4
5
6
7
8
9
10
Item
Receiving System
Available Channel
Input Voltage
Market
Screen Size
Aspect Ratio
Tuning System
Module
Operating Environment
Storage Environment
Specification
ATSC/64 & 256 QAM/NTSC-M
1) VHF : 02 ~ 13
2) UHF : 14 ~ 69
3) DTV : 02 ~ 69
4) CATV : 01 ~ 135
5) CADTV : 01 ~ 135
1) AC 100 ~ 240V 50/60Hz
2) AC 100 ~ 120V 50/60Hz
NORTH AMERICA
42 inch Wide(1024 X 768)
50 inch Wide(1365 X 768)
60 inch Wide(1365 X 768)
50 inch Wide(1920 X 1080)
60 inch Wide(1920 X 1080)
16 : 9
FS
PDP32F2####(852 X 480)
PDP42G2####(1024 X 768)
PDP50G2####(1365 X 768)
PDP50H3####(1920 X 1080)
PDP60H3####(1920 X 1080)
1) Temp : 0 ~ 40deg
2) Humidity : ~80%
1) Temp : -20 ~ 60deg
2) Humidity : 0 ~ 90%
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ADJUSTMENT INSTRUCTIONS
1. Application Range
This spec sheet is applied to all of the “PU92B” 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.
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
(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.
(5) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15cC
- In case of keeping module is in the circumstance of 0cC,
15cC
- In case of keeping module is in the circumstance of 0cC,
it should be placed in the circumstance of above 15cC for
2 hours
2 hours
- In case of keeping module is in the circumstance of below
-20cC, it should be placed in the circumstance of above
15cC for 3 hours.
15cC for 3 hours.
1) Press the POWER ON KEY on R/C for adjustment.
2) Press the ADJ KEY on R/C and enter EZ ADJUST.
2) Press the ADJ KEY on R/C and enter EZ ADJUST.
Select “4. WHITE PATTERN” by using
D
/
E
(CH +/-) and
select “White” by using
F
/
G
(VOL +/-)
- 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.
image may be occur in the black level part of the
screen.
Caution: Set up “RF mode(noise)” after PCB assembly adjustment.
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.
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) Click “Run”.
(7) After downloading, check “OK” message.
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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)
(RGB)
cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT), 0x60
(RGB), 0x90(HDMI)
2) Signal equipment displays
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 “
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)
(COMPONENT)
cf. 0x10(TV), 0x20(AV), 0x40(COMPONENT), 0x60
(RGB), 0x90(HDMI)
2) Signal equipment displays
3) Adjust by commanding AUTO_COLOR_ADJUST(0xF1)
0x00 0x02 instruction
4) Signal equipment displays
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 “
pushing “
G
” key at “0. ADC CALIBRATION”.
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.
5. DDC EDID Write Confirmation
ADJUSTMENT INSTRUCTIONS
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Caution: Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP
Module, especially be careful)
Module, especially be careful)
Caution: Set up “RF mode(noise)” before voltage adjustment.
6. POWER PCB Ass’y Voltage
Adjustment
(Va, Vs voltage Adjustment)
6-1. Test Equipment:
D.M.M 1EA
6-2. Connection Diagram for Measuring
Refer to Fig.1, Fig 2, Fig 3
6-3. 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,
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)
(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)
(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
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)
(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)
(deviation ; ±0.5V)
(5) 60” Va Adjustment (refer fig.3)
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M. to Va pin of P11, connect
2) Connect + terminal of D.M.M. to Va pin of P11, connect
-terminal to GND pin of P11.
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)
(deviation; ±0.5V)
(6) 60” Vs Adjustment (refer fig.3)
1) Connect + terminal of D. M..M. to Vs pin of P11, connect
-terminal to GND pin of P11.
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)
(deviation ; ±0.5V)
ADJUSTMENT INSTRUCTIONS
(Fig. 1) 50inch Power PCB Assy Voltage Adjustment
(Fig. 2) 42inch Power PCB Assy Voltage Adjustment
(Fig. 3) 60inch Power PCB Assy Voltage Adjustment
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