LG 42PG20D-AA (CHASSIS:PA81A) Service Manual ▷ View online
- 5 -
V
Module Specification2
Market
Broadcasting system
Receiving system
Video Input (2EA)
S-Video Input (1EA)
Component Input (2EA)
RGB Input
HDMI Input(3EA)
Audio Input (6EA)
SPDIF Out(1EA)
USB
1
2
3
4
5
6
7
8
9
10
11
No
Item
Specification
Remark
Australia
1) PAL-BG
2) DVB T
Analog : Upper Heterodyne
Digital : COFDM
PAL, NTSC
PAL, NTSC
Y/Cb/Cr, Y/Pb/Pr
RGB-PC
HDMI-PC
HDMI-DTV
RGB/DVI Audio, Component, AV
SPDIF Out
X-Studio(JPEG,MP3), Upgrade(USB1.3)
Rear AV 1EA, Side AV 1EA
Side AV
Analog(D-Sub 15Pin)
HDMI1/DVI,HDMI2,HDMI3(Side)
Side
- 6 -
ADJUSTMENT INSTRUCTION
1. Application Object
These instructions are applied all of the 42” PLASMA TV,
PA81A
PA81A
Chassis.
2. Note
(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 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 must keep 100-240V~,
50/60Hz.
(5) The receiver must be operated for about 15 minutes prior
to the adjustment.
O
After RGB Full white HEAT-RUN Mode, the receiver must
be operated prior to adjustment.
O
Enter into HEAT-RUN MODE
1) Press the POWER ON KEY on R/C for adjustment.
2) OSD display and screen display PATTERN MODE.
2) OSD display and screen display PATTERN MODE.
- Select “3. Test 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.
3. S/W auto download using the USB
Memory stick
(1) Insert the USB memory sick the PCB ASSEMBLY.
(2) Using ‘power on’ button of the control R/C, power on TV.
(3) S/W download process is executed automatically.
(2) Using ‘power on’ button of the control R/C, power on TV.
(3) S/W download process is executed automatically.
4. Auto-control adjustment process
V
All adjustment process is executed one time through RS-232C.
V
Command send -> ADC Calibration -> Model name
download -> EDID download.
V
Adjsutment process protocol(RS-232C)
5. Manual model name download
(1) Press ADJ KEY on R/C for model name D/L.
(2) Select “0.Model Option” and press ENTER(
(2) Select “0.Model Option” and press ENTER(
V
).
(3) Select model name by using
D
/
E
(CH+/-)and press
ENTER(
V
).
* Using ‘power on’ button off the control R/C, power on TV.
All adjustment process is executed one time through RS-232C.
Do not connect extrenal input calbe.
All adjustment process is executed one time through RS-232C.
Do not connect extrenal input calbe.
* Using ‘power on’ button of the control R/C, power on TV.
USB file(EPK) version must be bigger than downloaded
version of main B/D.
USB file(EPK) version must be bigger than downloaded
version of main B/D.
* Using ‘power on’ button off the control R/C, power on TV.
1
2
3
4
5
6
7
8
9
10
Ready
ADC
ADC
Confirmation
ADC
Mode Out
Download
Mode In
EDID
Download
Check EDID
Status
Define model
name
Adjustment
Confirmation
Download
Mode Out
NO
Item
Remark
CMD1 CMD2
Data 0
a
a
a
a
a
a
a
a
a
a
d
d
d
d
e
e
e
e
e
e
0
0
9
0
0
0~4,9
0~4,9
1~7
9
0
0
1
9
9
0
1
2
5
9
9
Ready
ADC start
Transmitting adjustment mode In
instruction, operate adjustment command.
All=0 ; HDMI1,2,3,4=1,2,3,4 ; RGB=9
All=0 ; HDMI1,2,3,4=1,2,3,4 ; RGB=9
Model define index(Data0) are listed at
next table.
EDID data existence check in SET
assembly
a
e
5
5
42PG20D-AA
CMD1
CMD2
Data 0
Remark
42PG20D-AA
52013360
Model Name
Model Option Value
- 7 -
6. Manual ADC Adjustment
V
Adjustment is done using internal ADC, so input signal is
not necessary.
V
Do not connect external input cable.
6-1. Required Equipment
(1) Press ADJ KEY on R/C and enter EZ ADJUST.
(2) Select “1.EDID D/L” by using
(2) Select “1.EDID D/L” by using
D
/
E
(CH+/-) and press
ENTER(
V
).
(3) Select “Start” by using
F
/
G
(VOL+/-) and press ENTER(
V
).
(4) ADC Adjustment is executed automatically.
7. EDID Download
7-1. Required Equipment
(1) Press ADJ KEY on R/C and enter EZ ADJUST.
(2) Select “5.EDID D/L” by using
(2) Select “5.EDID D/L” by using
D
/
E
(CH+/-) and press
ENTER(
V
).
(3) Select “Start” and press ENTER(
V
).
(4) EDID download is executed automatically.
(5) Press EXIT key on R/C.
(5) Press EXIT key on R/C.
7-2. EDID DATA
(1) RGB EDID
(2) HDMI 1
(3) HDMI 2
(4) HDMI 3
1.[1]-Product ID
*Do not connect HDMI and RGB cable.
NO SIGNAL or White noise
NO SIGNAL
RF Input
AV / Component / RGB input
42PG20D
Product ID
Product ID
Product ID
HDMI
Model
Name
EDID table
3F9D
409D
Analog(RGB)
Digital(HDMI)
3EA
Hex
9D3F
9D40
40255
40256
- 8 -
8. POWER PCB Assy Voltage
Adjustments
(Va, Vs Voltage adjustments)
8-1. Test Equipment :
D.M.M. 1EA
8-2.Connection Diagram for Measuring
: refer to Fig.1
8-3. Adjustment Method
(1) Va Adjustment
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)
(2) Vs Adjustment
1) Input signal : RF noise signal.
2) Connect + terminal of D.M.M to Vs pin of P811, connect
2) Connect + terminal of D.M.M to Vs pin of P811, connect
– terminal to GND pin of P811.
3) 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)
9. Adjustment of White Balance
9-1. Required Equipment
(1) Color Analyzer : CA-1000, CA-100+(CH.10) CA-210(CH.10).
* Please adjust CA-100+/CA-210 by CS-1000 before
measuring.
-> You should use Channel 10 which is Matrix
compensated(White, Red, Green, Blue revised) by CS-
1000 and adjust in accordance with balance adjustment
coordinate.
1000 and adjust in accordance with balance adjustment
coordinate.
W
Color temperature standards according to CSM and Module.
W
Change target luminance and range of the Auto adjustment
W/B equipment.
W
White balance adjustment coordinate and color temperature.
* PC(for communication through RS-232C)
-> UART Baud rate : 115200 bps
Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)
(Because power PCB Assembly damages to PDP Module,
especially be careful)
(Fig.1) Connection diagram of power adjustment for measuring
* Press the POWER ON KEY on R/C before Model name download.
Befor adjusting White-balance, the AV ADC should be done.
If ADC status were “NG”, Need to ADC adjustment.
If ADC status were “NG”, Need to ADC adjustment.
PLASMA
Remark
11000K
9300K
6500K
Cool
Normal
Warm
CSM
65
20
Range
Target luminance
0.276
0.283
0.000
0.276±0.002
0.283±0.002
0.000
0.276±0.002
0.283±0.002
0.000
X
y
uv
Cool
CS-1000
CA-100+(CH.10) CA-210(CH.10)
0.285
0.293
0.000
0.285±0.002
0.293±0.002
0.000
0.285±0.002
0.293±0.002
0.000
X
y
uv
Medium
CS-1000
CA-100+(CH.10) CA-210(CH.10)
0.313
0.329
0.003
0.313±0.002
0.329±0.002
0.003
0.313±0.002
0.329±0.002
0.003
X
y
uv
Warm
CS-1000
CA-100+(CH.10) CA-210(CH.10)
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