Read LG 50PG79ED-AF (CHASSIS:PA84D) Service Manual online
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1. Application Range
This spec. sheet is applied to all of the PA81A, PA81C
chassis manufactured at LG TV Plant all over the world.
chassis manufactured at LG TV Plant all over the world.
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 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 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
2) Press the ADJ KEY on R/C and enter EZ ADJUST
- 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.
* 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.
an after image may be occur in the black level part of
the screen.
PCB Assembly Adjustment Method
Caution: Using ‘power on’ button of the control R/C , power
on TV.
All adjustment process is executed one time through RS-
232C.
Do not connect external input cable.
Power off TV After adjustment method, not using ‘in-stop’
button of control R/C
on TV.
All adjustment process is executed one time through RS-
232C.
Do not connect external input cable.
Power off TV After adjustment method, not using ‘in-stop’
button of control R/C
3. S/W Auto Download Using the
USB Memory Stick
Caution: 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.
TV.
USB file (EPK) version must be bigger than downloaded
version of main B/D.
(1) Insert the USB memory stick to 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
(1) All adjustment process is executed one time through RS-
232C.
(2) Command send
(
ADC Calibration
(
Model name
download
(
EDID download.
ADJUSTMENT INSTRUCTION
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
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