Factory Adjustment; Manual Adjustment - LG 43LF5900 Service Manual

5. Factory Adjustment

5.1. EDID (The Extended Display Identification
Data)/DDC (Display Data Channel) Download
● Summary
▪ It is established in VESA, for communication between PC
and Monitor without order from user for building user
condition. It helps to make easily use realize "Plug and Play"
function. For EDID data write, we use DDC2B protocol.
● Auto Download (No need Writing EDID data in Assembly line)
▪ After Set Tool Option, then TV turn off and on finish auto
download
* EDID data for FHD, 2D, DTS, 8Bit (43/49/55LF59 Series)
(Model name = LG TV ).
- HDMI - 1 EDID table ( 0x40, 0x1B )
-. LVDS supports 8bit ( CEA Block 0x23 :80, 0x24 : 1E)
1) HDMI 1 Check sum : 0x40, 0x1B (CEA Block 0x21 :10)
2) HDMI 2 Check sum : 0x40, 0x0B (CEA Block 0x21 :20)
* EDID data for HD.2D.DTS, 8Bit (32LF59 Series) (Model
name = LG TV )
- - HDMI-1 EDID table (0x74, 0XE2)
A. If the LVDS supports 8bit (not support Deep color) , CEA
Block 0x23 :80, 0x24 : 1E)
1) HDMI 1 Check sum : 0x74, 0XE2 (CEA Block 0x21 :10)
2) HDMI 2 Check sum : 0x74, 0XD2 (CEA Block 0x21 :20)
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5.2. Adjustment Color Temperature
(White balance)
● W/B Equipment condition
CA210 : CH 14, Test signal : Inner pattern (80IRE) – LED
CH18, Test signal : Inner pattern (80IRE) – ALEF
● Above 5 minutes H/run in the inner pattern. ("power on" key of
adjust remote control)
※ The spec of color temperature and coordinate.
Cool
13,000k
(C50)
Medium
All 9,300k
(0)
Warm
6,500k
(W50)
1) RS-232C Command used during auto-adj.
RS-232C COMMAND
CMD DATA ID
Wb 00 00
Wb 00 ff
5.2.1. Adjustment method
5.2.2. Auto WB calibration
1) Set TV in ADJ mode using P-ONLY key (or POWER ON
key)
2) Place optical probe on the center of the display
- It need to check probe condition of zero calibration before
adjustment.
3) Connect RS-232C Cable
4) Select mode in ADJ Program and begin a adjustment.
5) When WB adjustment is completed with OK message,
check adjustment status of pre-set mode (Cool, Medium,
Warm)
6) Remove probe and RS-232C cable.
▪ W/B Adj. must begin as start command "wb 00 00" , and
finish as end command "wb 00 ff", and Adj. offset if need

5.2.3. Manual adjustment

5.2.3.1 Manual adj. method
1) Set TV in Adj. mode using POWER ON
2) Zero Calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10cm of the surface..
3) Press ADJ key à EZ adjust using adj. R/C → 11. White-
Balance then press the cursor to the right (KEY►). When
KEY(►) is pressed 206 Gray internal pattern will be
displayed.
4) Adjust Cool modes
- Fix the one of R/G/B gain to 192 (default data) and
decrease the others. (If G gain is adjusted over 172 and R
and B gain less than 192 , Adjust is O.K.)
- If G gain is less than 172,
Increase G gain by up to 172, and then increase R gain and
G gain same amount of increasing G gain.
- 11 -
Module
Module
X=0.271 (±0.002)
<Test signal>
K
Y=0.270 (±0.002)
- Inner pattern
X=0.286 (±0.002) for W/B adjust
K
Y=0.289 (±0.002) - External white
pattern (80IRE,
X=0.313 (±0.002)
K
204gray)
Y=0.329 (±0.002)
Explanation
Begin White Balance adj.
End White Balance adj. (internal pattern
disappears )
LGE Internal Use Only