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LG 42LN549D Service Manual page 12

Chassis : lb3ax

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* CASE Cool
First adjust the coordinate far away from the target value(x, y).
① x, y > target
i) Decrease the R, G.
② x, y < target
i) First decrease the B gain,
ii) Decrease the one of the others.
③ x > target, y < target
i) First decrease B, so make y a little more than the
target.
ii) Adjust x value by decreasing the R
④ x < target, y > target
i) First decrease B, so make x a little more than the
target.
ii) Adjust x value by decreasing the G
* After You finish all adjustments, Press "In-start" button and
compare Tool option and Area option value with its BOM, if
it is correctly same then unplug the AC cable.
If it is not same, then correct it same with BOM and unplug
AC cable.
For correct it to the model's module from factory JIG model.
* Push The "IN STOP KEY" after completing the function
inspection.
4.2. DDC EDID Write (RGB 128Byte )
■ Connect D-sub Signal Cable to D-Sub Jack.
■ Write EDID DATA to EEPROM(24C02) by using DDC2B
protocol.
■ Check whether written EDID data is correct or not.
* For Service main Assembly, EDID have to be downloaded to
Insert Process in advance.
4.3. DDC EDID Write (HDMI 256Byte)
■ Connect HDMI Signal Cable to HDMI Jack.
■ Write EDID DATA to EEPROM(24C02) by using DDC2B
protocol.
■ Check whether written EDID data is correct or not.
* For Service main Assembly, EDID have to be downloaded to
Insert Process in advance.
4.4. EDID data
(1) All Data : HEXA Value
(2) Changeable Data :
*: Serial No : Controlled / Data:01
**: Month : Controlled / Data:00
***: Year : Controlled
****: Check sum
4.4.1. Auto Download
■ After enter Service Mode by pushing "ADJ" key,
■Enter EDID D/L mode.
■Enter "START" by pushing "OK" key.
* Caution : Never connect HDMI & D-sub Cable when EDID
downloaded.
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option Commercial
6. Country Group
7. Area Option
8. ADC Calibration
9. White Balance
10. 10 Point WB
11. Test Pattern
12. EDID D/L
13. Sub B/C
14. Ext. Input Adjust
* EDID data and Model option download (RS232)
NO
Item
Enter download
Download
MODE
'Mode In'
EDID data and
Model option
Download
download
4.4.2. Manual Download
<Caution>
(1) Use the proper signal cable for EDID Download
* For HDMI EDID(DVI-D to HDMI or HDMI to HDMI Cable)
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
(2) Never connect HDMI & D-sub Cable at the same time.
(3) Use the proper cables below for EDID Writing.
(4) Download HDMI1, HDMI2 separately because HDMI1 is
different from HDMI2.
For Analog
D-sub to D-sub
No.
Item
1
Manufacturer ID
2
Version
3
Revision
- 12 -
EDID
HDMI1
NG
HDMI2
NG
HDMI3
NG
RGB
NG
Start
Reset
EDID
HDMI1
OK
HDMI2
OK
HDMI3
OK
RGB
OK
Start
Reset
CMD 1 CMD 2 Data 0
When transfer the 'Mode
A
A
0
0
In', Carry the command.
Automatically download
A
E
00 10
(The use of a internal
data)
For HDMI EDID
DVI-D to HDMI or HDMI to HDMI
Condition
Hex Data
GSM
Digital : 1
Digital : 3
LGE Internal Use Only
1E6D
01
03

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