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1. Application Range
This spec. sheet is applied to all of the LD89A 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.
(2) Adjustment must be done in the correct order.
(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.
(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
A
press ENTER(
4) Select "White" by using
A
ENTER(
)
* 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.
3. PCB assembly adjustment method
Caution: Using 'power on' button of the Adjustment R/C ,
power on TV.
* ADC Calibration Protocol (RS232)
Item
CMD1 CMD2 Data0
Enter
Adjust 'Mode In'
Adjust Mode
ADC adjust ADC Adjust
Adjust 'Mode Out'
Adjustment
Confirmation
- Baud rate : 115200 bps
- RS232 Host : PC
- echo : none
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
ADJUSTMENT INSTRUCTION
D
E
/
(CH +/-) and
)
F
G
/
(VOL +/-) and press
A
D
0
0
When transfer the 'Mode In',
Carry the command.
A
D
1
0
Automatically adjustment
(The use of a internal pattern)
A
D
9
0
A
D
9
9
To check ADC Adjustment
on Assembly line.
3.1 ADC adjustment
RF input
NO SIGNAL or White noise
* 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
A
ENTER(
)
3) Select "Start" by using
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
on screen. But it works abnormally, "No CA module" words
display on screen.
* Caution: Set up "RF mode" before launching products.
4. Set Assembly adjustment method
4.1 EDID
(The Extended Display Identification DATA)
* When company internal production(total assembly), EDID
data must scan in DDC line.
4.1.1 EDID Download
Before downloading EDID Data, check the RGB/HDMI cable
is disconnected.
1) Press ADJ key on Adjustment R/C.
2) Select "5.EDID D/L" by using
A
ENTER(
)
3) Select "Start" by using
4) EDID DownLoad is executed if word "NG" is changed to
"OK" about all HDMI ports.
4.1.2 EDID Data
No
Item
1
Manufacturer ID
2
Version
3
Revision
- 9 -
AV / Component / RGB input
NO SIGNAL
D
E
/
(CH +/-) and press
F
G
/
(VOL +/-) and press ENTER(
D
E
/
(CH +/-) and press
F
G
/
(VOL +/-) and press ENTER(
Condition
Hex Data
GSM
1E6D
Digital : 1
Digital : 3
LGE Internal Use Only
A
)
A
)
01
03
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