DOWNLOAD LG 37LD840 (CHASSIS:LJ03B) Service Manual ↓ Size: 9.43 MB | Pages: 50 in PDF or view online for FREE

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A

Write HDMI EDID data  

• Using instruments 

- Jig. (PC Serial to D-Sub connection) for PC, DDC

adjustment.  

- S/W for DDC recording (EDID data write and read) 
- D-sub jack 
- Additional HDMI cable connection Jig. 

• Preparing and setting.  

- Set instruments and Jig. Like pic.5), then turn on PC and

Jig.  

- Operate DDC write S/W (EDID write & read) 
- It will operate in the DOS mode. 

Pic.3) For write EDID data, setting Jig and another instruments. 

• EDID data for LJ03B/D/E/R Chassis (Model name = LG TV) 

- HDMI-1 EDID table (0x04, 0x5A) 

- HDMI-2 EDID table (0x04, 0x4A) 

- HDMI-3 EDID table (0x04, 0x3A) 

- HDMI-4 EDID table (0x04, 0x2A) 

- Analog (RGB) EDID table (0x1D) 

See Working Guide if you want more information about EDID
communication. 

PC

VSC

B/D

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Using Instruments 

• Color Analyzer: CA-210 (CH 9)  

- Using LCD color temperature, Color Analyzer (CA-210)

must use CH 9, which Matrix compensated (White, Red,
Green, Blue compensation) with CS-2100. See the
Coordination bellowed one.  

• Auto-adjustment Equipment (It needs when Auto-

adjustment  – It is availed communicate with RS-232C :
Baud rate: 115200)  

• Video Signal Generator MSPG-925F 720p, 216Gray

(Model: 217, Pattern 78) 

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Connection Diagram (Auto Adjustment)  

• Using Inner Pattern 

• Using HDMI input 

<Pic.5 Connection Diagram for Adjustment White balance> 

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White Balance Adjustment   

If you can’t adjust with inner pattern, then you can adjust it
using HDMI pattern. You can select option at “Ez-Adjust
Menu  – 7. White Balance” there items “NONE, INNER,
HDMI”. It is normally setting at inner basically. If you can’t
adjust using inner pattern you can select HDMI item, and
you can adjust. 

In manual Adjust case, if you press ADJ button of service
remocon, and enter “Ez-Adjust Menu – 7. White Balance”,
then automatically inner pattern operates. (In case of
“Inner” originally “Test-Pattern. On” will be selected in The
“Test-Pattern. On/Off”.  

• Connect all cables and equipments like Pic.5) 
• Set Baud Rate of RS-232C to 115200. It may set 115200

orignally. 

• Connect RS-232C cable to set 
• Connect HDMI cable to set 

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RS-232C Command (Commonly apply)     

• “wb 00 00”: Start Auto-adjustment of white balance. 
• “wb 00 10”: Start Gain Adjustment (Inner pattern)  
• “jb 00 c0” :  
• …
• “wb 00 1f”: End of Adjustment 

* If it needs, offset adjustment (wb 00 20-start, wb 00 2f-

end) 

• “wb 00 ff”: End of white balance adjustment (inner pattern

disappear) 

C A -100+

C O L O R

A N A L Y Z E R

T Y P E ; C A -100+

F u l l W h i t e P at t er n

R S-232C

O

• When Color temperature (White balance) Adjustment

(Automatically) 

- Press  “Power only key” of service remocon and operate

automatically adjustment. 

- Set BaudRate to 115200. 

• If it needs, then adjustment “Offset”. 

A

White Balance Adjustment (Manual adjustment)    

• Test Equipment: CA-210 

- Using LCD color temperature, Color Analyzer (CA-210)

must use CH 9, which Matrix compensated (White, Red,
Green, Blue compensation) with CS-2100. See the
Coordination bellowed one.  

• Manual adjustment sequence is like bellowed one.  

- Turn  to  “Ez-Adjust” mode with press ADJ button of

service remocon. 

- Select  “10.Test Pattern” with CH+/- button and press

enter. Then set will go on Heat-run mode. Over 30
minutes set let on Heat-run mode. 

- Let CA-210 to zero calibration and must has gap more

10cm from center of LCD module when adjustment.  

- Press  “ADJ” button of service remocon and select

“7.White-Balance” in “Ez-Adjust” then press “ 

G

” button

of navigation key.

(When press “ 

G 

” button then set will go to full white

mode)

- Adjust at three mode (Cool, Medium, Warm) 
- If “cool” mode 

Let B-Gain to 192 and R, G, B-Cut to 64 and then
control R, G gain adjustment High Light adjustment. 

- If “Medium” and “Warm” mode 

Let R-Gain to 192 and R, G, B-Cut to 64 and then
control G, B gain adjustment High Light adjustment. 

- All of the three mode 

Let R-Gain to 192 and R, G, B-Cut to 64 and then
control G, B gain adjustment High Light adjustment. 

- With volume button (+/-) you can adjust.  
- After all adjustment finished, with Enter (

A 

key) turn to

Ez-Adjust mode. Then with ADJ button, exit from
adjustment mode 

Attachment: White Balance adjustment coordination and

color temperature. 

• Using CS-1000 Equipment.   

- COOL : T=11000K, 

∆

uv=0.000, x=0.276 y=0.283  

- MEDIUM  : T=9300K, 

∆

uv=0.000, x=0.285 y=0.293  

- WARM  : T=6500K, 

∆

uv=0.000, x=0.313 y=0.329  

• Using CA-210 Equipment. (9 CH)     

- Contrast value: 216 Gray  

- White Balance adjustment coordination and color

temperature  for Edge(IOP) LED (LJ03D/E) 

-White Balance adjustment table for Edge (IOP) LED

(LJ03D/E) 

- 15 -

1) Turn on TV 

2) Press EYE key of Adj. R/C 
3) Cover the Eye Q II sensor on the front of the using your

hand and wait for 6 seconds 

4) Confirm that R/G/B value is lower than 10 of the “Raw Data

(Sensor data, Back lignt )” .  If after 6 seconds, R/G/B value
is not lower than 10, replace Eye Q II sensor 

5) Remove your hand from the Eye Q II sensor and wait for 6

seconds  

6) Confirm that “ok” pop up.  

If change is not seen, replace Eye Q II sensor 

• No Need. 

Press In-Start button of Service Remocon then set the
“4.Baud Rate” to 115200. Then check RS-232C control and  

page.)  

• Press “In-Start” button of Service Remocon, then enter the
“Option” Menu with “PIP CH-“ Button  
• Select one of these three (USA, CANADA, MEXICO)
defends on its market using “Vol. +/-“button. 

A

Check the connection between set and power cord 

A

Fully connected (Between set and power cord) set enter the
Auto-test sequence. 

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Connect D-Jack AV jack test equipment. 

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Turn on Auto-controller(GWS103-4) 

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Start Auto GND test. 

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If its result is NG, then notice with buzzer. 

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If its result is OK, then automatically it turns to ESD Test. 

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Operate ESD test 

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If its result is NG, then notice with buzzer. 

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If its result is OK, then process next steps. Notice it with
Good lamp and STOPER Down.Check Items. 

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Test Voltage  

• GND: 1.5KV/min at 100mA 
• Signal: 3KV/min at 100mA 

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Test time: just 1 second. 

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Test point 

• GND test: Test between Power cord GND and Signal

cable metal GND.  

• ESD test: Test between Power cord GND and Live and

neutral. 

A

Leakage current: Set to 0.5mA(rms) 

In case of POWER ONLY, System color is operated multi
system 
In case of IN STOP, System color is operated default system
(PAN-M) 

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