Read LG 52LG7000-ZA (CHASSIS:LD88F) Service Manual online
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ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the LD88F chassis
manufactured at LG TV Plant all over the world.
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.
- After RGB Full White in HEAT-RUN Mode, the receiver
must be operated prior to the adjustment.
- Enter into HEAT-RUN MODE
1) Press the “POWER ON” KEY on Adjustment R/C.
2) Press the “ADJ KEY” on Adjustment R/C.
3) Select “3. Test Pattern” by using
2) Press the “ADJ KEY” on Adjustment R/C.
3) Select “3. Test Pattern” by using
D
/
E
(CH +/-) and
press ENTER(
A
)
4) Select “White” by using
F
/
G
(VOL +/-) and press
ENTER(
A
)
* 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 pattern 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.
3. PCB assembly adjustment method
Caution: Using ‘power on’ button of the Adjustment R/C ,
power on TV.
* ADC Calibration Protocol (RS232)
* EDID data and Model option download (RS232)
** Note 1 & Note 2
- Baud rate : 115200 bps
- RS232 Host : PC
- echo : none
- RS232 Host : PC
- echo : none
3.1. ADC adjustment
* Adjustment can be done using only internal ADC, so input
signal is not necessary.
* Required equipment : Adjustment R/C.
1) Press ADJ key on adjustment R/C.
2) Select “1. ADC calibration” by using
2) Select “1. ADC calibration” by using
D
/
E
(CH +/-) and press
ENTER(
A
)
3) Select “Start” by using
F
/
G
(VOL +/-) and press ENTER(
A
)
4) ADC adjustment is executed automatically.
3.2 PCMCIA CARD Checking Method
You must adjust DTV 29 Channel and insert PCMCIA CARD
to socket.
1) If PCMCIA CARD works normally, normal signals display
to socket.
1) If PCMCIA CARD works normally, normal signals display
on screen. But it works abnormally, “No CA module” words
display on screen.
display on screen.
* Caution: Set up “RF mode” before launching products.
Item
CMD1 CMD2 Data0
Enter
Adjust ‘Mode In’
A
D
0
0
When transfer the ‘Mode In’,
Adjust Mode
Carry the command.
ADC adjust ADC Adjust
A
D
1
0
Automatically adjustment
(The use of a internal pattern)
Adjust ‘Mode Out’
A
D
9
0
Adjustment
A
D
9
9
To check ADC Adjustment
Confirmation
on Assembly line.
RF input
AV / Component / RGB input
NO SIGNAL or White noise
NO SIGNAL
NO
Item
CMD1 CMD2
Data0
Enter
Download
A
E
0
0
When transfer the ‘Mode
download
‘Mode In’
In’, Carry the command.
MODE
Edid data and Download
A
E
*Note1 *Note2 Automatically download
Model option
(The use of a internal Data)
download
Adjust ‘Mode Out’
A
E
9
0
Adjustment
A
E
9
9
To check download
Confirmation
on assembly line
Model Option
Note 1
Note 2
32LG7000-ZA
5
6
37LG7000-ZA
5
7
42LG7000-ZA
5
8
47LG7000-ZA
5
9
52LG7000-ZA
5
A
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