LG 42PC1DG-AA (CHASSIS:PB61A) Service Manual ▷ View online
- 5 -
2. Model General Specification
Broadcasting system
Available Channel
Tuner IF
Input Voltage
PDP Module
Aspect ratio
Operating Temperature
Operating Humidity
Storage Temperature
Storage Humidity
PAL-B/G, DTV : DVB-T
1) VHF : 00 ~ 12
2) UHF : 20 ~ 75
3) CATV : 02 ~ 44
4) DTV : 06 ~12, 27 ~ 69
1) PAL : 38.90MHz(Picture),
34.40MHz(Sound)
2) DVB-T : 36.125MHz
240V~, 50Hz
PDP42X3A
16:9 (wide)
0
40
deg
85
%
-20
60
deg
85
%
1
2
3
4
5
6
7
8
9
10
No
Item
Remark
Maker : LGE
RGB Closed Type
Specification
Min Typ Max Unit
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ADJUSTMENT INSTRUCTIONS
1. Application Object
These instructions are applied to all of the 42” PLASMA TV,
PB61A Chassis
PB61A Chassis
2. Notes
(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 equipment.
transformer will help protect test equipment.
(2) Adjustments must be done in the correct order.
(3) The adjustments must be performed in the circumstance of
(3) The adjustments must be performed in the circumstance of
25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
there is no specific designation.
(4) The input voltage of the receiver be must kept 220V~,
60Hz when adjusting.
(5) The receiver must be operational for about 15 minutes
prior to the adjustments.
O
Preliminary action is applied to the test for afterimage
discharge detection, and 100% FULL WHITE PATTERN
must be operated automatically.
must be operated automatically.
O
Test for afterimage discharge detection
1) After pressing Power Only key(only operating by
pressing Power Only key), Full Test Pattern(2 min
30sec) --> Full Black Pattern(30sec) --> After this state,
Full White Pattern is displayed.
(but you must preset the program for Full White State
when you press the Main Power Off/On)
30sec) --> Full Black Pattern(30sec) --> After this state,
Full White Pattern is displayed.
(but you must preset the program for Full White State
when you press the Main Power Off/On)
2) Pattern Mode is deselected by pressing CH +/-, Exit Key.
[ Set is activated HEAT-RUN without signal generator in
this mode.
If you turn on a still screen more than 20 minutes (Especially
Digital pattern, Cross Hatch Pattern), an afterimage may occur
in the black level part of the screen.
Digital pattern, Cross Hatch Pattern), an afterimage may occur
in the black level part of the screen.
3. CPLD Download
(1) Test Equipment: PC, Jig for download.
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click icon.
(5) End after confirming.
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click icon.
(5) End after confirming.
4. Sub-ucom(MTV) Download
(1) Test Equipment: PC, Jig for download.
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click icon.
(5) End after confirming.
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click icon.
(5) End after confirming.
5. MST3362M-Set Adjustment
5-1. Synopsis
MST3362M-Set adjustment to set the black level and the Gain
of optimum with an automatic movement from the analog =>
digital converter.
of optimum with an automatic movement from the analog =>
digital converter.
5-2. Test Equipment
Service R/C, 801GF(802B,802F,802R),
MSPG-925 Pattern Generator.
( 480i, 1080i 60Hz Color Bar Pattern output will be possible
and the output level will accurately have to be revised with
0.7±0.1Vp-p)
MSPG-925 Pattern Generator.
( 480i, 1080i 60Hz Color Bar Pattern output will be possible
and the output level will accurately have to be revised with
0.7±0.1Vp-p)
5-3. Adjustment
(1) How to adjustment the Component1
1) Select Component1 as the input with Color Bar Pattern
in 480i 60Hz mode and select ‘Component1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘1. ADC 480i Comp1’. Pressing the Vol+
Key to adjust the component1.
and select the ‘1. ADC 480i Comp1’. Pressing the Vol+
Key to adjust the component1.
3) When the adjustment is over, 'Component1 Adjustment
OK’ is displayed. If the adjustment has errors,
'Component1 Adjustment Failed! Try Again!’ is
displayed.
'Component1 Adjustment Failed! Try Again!’ is
displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
(2) How to adjustment the Component2, RGB
1) Select Component2, RGB-DTV as the input with Color
Bar Pattern in 1080i 60Hz mode and select
‘Component2’ on screen.
‘Component2’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘2. ADC 1080i Comp2/RGB’. Pressing
the Vol+ Key to adjust the component2.
and select the ‘2. ADC 1080i Comp2/RGB’. Pressing
the Vol+ Key to adjust the component2.
3) When the adjustment is over, 'Component2 Adjustment
OK’ is displayed. If the adjustment has errors,
'Component2 Adjustment Failed! Try Again!’ is
displayed. and If the adjustment has errors, 'RGB
Adjustment Failed! Try Again!’ is displayed.
'Component2 Adjustment Failed! Try Again!’ is
displayed. and If the adjustment has errors, 'RGB
Adjustment Failed! Try Again!’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
PC
VSC
B/D
JIG cable(CPLD D/L )
<Fig. 1> Connection Diagram of CPLD Download
(Fig. 2) Adjust Pattern : 480i, 1080i 60Hz Color Bar Pattern
- 7 -
6. Video(uPD)-Set
6-1. Synopsis
This is a adjustment to reduce the color difference of video
signal Main/Sub Display.
signal Main/Sub Display.
6-2. Required Equipment
Service R/C, MSPG-925 Pattern Generator.
(It’s available to output the Color Bar Pattern of the NTSC,PAL)
(It’s available to output the Color Bar Pattern of the NTSC,PAL)
6-3. Adjustment
(1) How to adjustment the uPD PAL
1) Select AV1 as the input with 100% 8 Color Bar Pattern
in PAL mode and select ‘AV1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘3. uPD PAL(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD PAL.
and select the ‘3. uPD PAL(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD PAL.
3) When the adjustment is over, 'uPD64015 PAL Main
Adjustment OK’ and ‘uPD64015 PAL Sub Adjustment
OK’ is displayed. If the adjustment has errors,
'uPD64015 PAL Main Error!’ or 'uPD64015 PAL Main
Error!’ is displayed.
OK’ is displayed. If the adjustment has errors,
'uPD64015 PAL Main Error!’ or 'uPD64015 PAL Main
Error!’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
(2) How to adjustment the uPD NTSC
1) Select AV1 as the input with 100% 8 Color Bar Pattern
in NTSC mode and select ‘AV1’ on screen.
2) After receiving signal for at least 1 second, press the
ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘4. uPD NTSC(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD NTSC.
and select the ‘4. uPD NTSC(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD NTSC.
3) When the adjustment is over, 'uPD64015 NTSC Main
Adjustment OK’ and ‘uPD64015 NTSC Sub Adjustment
OK’ is displayed. If the adjustment has errors,
'uPD64015 NTSC Main Error!’ or 'uPD64015 NTSC
Main Error!’ is displayed.
OK’ is displayed. If the adjustment has errors,
'uPD64015 NTSC Main Error!’ or 'uPD64015 NTSC
Main Error!’ is displayed.
4) Readjust after confirming the case Pattern or adjustment
condition where the adjustment had errors.
5) After adjustment is complete, exit the adjustment mode
by pressing the ADJ KEY.
7. POWER PCB Assy Voltage
Adjustment
(Va, Vs Voltage Adjustment)
7-1. Test equipment:
D.M.M 1EA
7-2. Connection Diagram for Measuring
Refer to Fig.5
7-3. Adjustment Method
Adjustment Method for Power Board( P/No: 6709900019A)
(1) Va Adjustment
1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M to Va pin of P812, connect
2) Connect + terminal of D.M.M to Va pin of P812, connect
- terminal to GND pin of P812.
3) After turning VR0901, 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) Vs Adjustment
1) Connect + terminal of D.M.M to Vs pin of P812, connect
– terminal to GND pin of P812.
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)
(Deviation; ±0.5V)
(Fig. 3) Adjust Pattern :100% 8 Color Bar Pattern
Each PCB Assy must be checked by Check JIG Set before
assembly. (Especially, be careful Power PCB Assy which can
cause Damage to the PDP Module.)
assembly. (Especially, be careful Power PCB Assy which can
cause Damage to the PDP Module.)
1
1
1
Vs ADJ
VR951
Va ADJ
VR901
GND
Va
5V
Vs
GND
P821
GND
5V
P822
P811
P812
1
1
1
Vs ADJ
VR951
Va ADJ
VR901
GND
Va
5V
Vs
GND
P821
GND
5V
P822
P811
P812
(Fig. 5) Connection Diagram of Power Adjustment for Measuring
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8. EDID(The Extended Display
Identification Data)/DDC
(Display Data Channel) Download
(Display Data Channel) Download
This is the function that enables “Plug and Play".
8-1. Required Test Equipment
(1) PC, Jig for adjusting DDC.
(PC serial to D-sub Connection equipment)
(2) DVI to HDMI Connector.
8-2. Setting of Device
8-3. EDID DATA
(1) HDMI EDID DATA.
(2) RGB EDID DATA.
8-4. Act or set the EDID S/W
1) As above Fig. 6, 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 : 3
Device Address : A0
PageByte : 8
Device Address : A0
PageByte : 8
8-5. How to use the EDID S/W
1) Init the data.
2) Load the EDID data.(Open File)
3) Press the “Write Data & Verify”button. and input the
data.
4) If the writing is finished, you will see the “OK” message.
Analog EDID
D-sub to D-sub
HDMI EDID
DVI-D to HDMI
PC
JIG
PDP
SET
10
24
40
Checksum
Model
42PC1DG-AA
40
1024
RGB
(Analog)
HDMI
(Digital)
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