LG 32LP620H (CHASSIS:LA3AA) Service Manual ▷ View online
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5. Manual Adjustment
5.1. ADC Adjustment
5.1.1. Overview
▪ ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviation
5.1.2. Equipment & Condition
(1) Adjust Remocon
(2) 801GF(802B, 802F, 802R) or MSPG925FA Pattern
Generator
- Resolution : 480i Comp1 (MSPG-925FA: model-209,
pattern-65)
- Resolution : 1024*768 RGB (Inner Pattern)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level: 0.7±0.1 Vp-p
- Image
- or Inner pattern
(3) Must use standard cable
5.1.3. Adjust method
5.1.3.1. ADC RGB
(1) Press the In-start Key on the ADJ remote after at least 1
min of signal reception. Then, select ADC Calibration. And
Press OK Button on the menu “Start”. The adjustment will
start automatically.
(2) If ADC RGB is successful, “ADC RGB Success” is
displayed and ADC RGB is completed.
If ADC calibration is failure, “ADC RGB Fail” is displayed.
(3) If ADC calibration is failure, after rechecking ADC pattern
or condition, retry calibration
5.2. EDID/DDC Download(EDID PCM)
5.2.1. Overview
- It is a VESA regulation. A PC or a MNT will display an optimal
resolution through information sharing without any necessity
of user input. It is a realization of “Plug and Play”.
5.2.2. Equipment
(1) Adjust remocon.
(2) Since embedded EDID data is used, EDID download JIG,
HDMI cable and D-sub cable are not need
5.2.3. Download method
(1) Press Adj. key on the Adj. R/C.
(2) Select EDID D/L menu.
(3) By pressing Enter key, EDID download will begin
(4) If Download is successful, OK is display, but If Download is
failure, NG is displayed.
(5) If Download is failure, Re-try downloads.
[Caution] : When EDID Download, must remove RGB/HDMI
Cable.
5.2.4. EDID DATA
(1) FHD Model (39/42/47/55inch series only)
■ HDMI 1 FHD 8BIT (C/S : E9CF)
■ HDMI 2 FHD 8BIT (C/S : E9BF)
■ HDMI 3 FHD 8BIT (C/S : E9AF)
■ RGB-FHD 8BIT (C/S : 02)
EDID Block 0, Bytes 0-127 [00H-7FH]
(2) FHD Model (60inch only)
■ HDMI 1 FHD 10BIT (C/S : E988)
■ HDMI 2 FHD 10BIT (C/S : E978)
■ HDMI 3 FHD 10BIT (C/S : E968)
■ RGB FHD 8BIT (C/S : 02)
EDID Block 0, Bytes 0-127 [00H-7FH]
(3) HD Model (32inch series only)
■ HDMI 1 HD 8BIT (C/S : 71CF)
■ HDMI 2 HD 8BIT (C/S : 71BF)
■ HDMI 3 HD 8BIT (C/S : 71AF)
■ RGB HD 8BIT (C/S : 8A)
EDID Block 0, Bytes 0-127 [00H-7FH]
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(2) FHD Model (60inch only)
■ HDMI 1 FHD 10BIT (C/S : E988)
■ HDMI 2 FHD 10BIT (C/S : E978)
■ HDMI 3 FHD 10BIT (C/S : E968)
■ RGB FHD 8BIT (C/S : 02)
EDID Block 0, Bytes 0-127 [00H-7FH]
(3) HD Model (32inch series only)
■ HDMI 1 HD 8BIT (C/S : 71CF)
■ HDMI 2 HD 8BIT (C/S : 71BF)
■ HDMI 3 HD 8BIT (C/S : 71AF)
■ RGB HD 8BIT (C/S : 8A)
EDID Block 0, Bytes 0-127 [00H-7FH]
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6. Final Assembly Adjustment
6.1. White Balance Adjustment
6.1.1. Overview
6.1.1.1. W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel’s W/B deviation
(2) How-it-works: When R/G/B gain in the OSD is at 192, it
means the panel is at its Full Dynamic Range. In order to
prevent saturation of Full Dynamic range and data, one of
R/G/B is fixed at 192, and the other two is lowered to find
the desired value.
(3) Adj. condition: normal temperature
- Surrounding Temperature: 25±5 ºC
- Warm-up time: About 5 Min
- Surrounding Humidity: 20% ~ 80%
▪ Before White balance adjustment, Keep power on status,
don’t power off
6.1.1.2. Adj. condition and cautionary items
(1) Lighting condition in surrounding area surrounding lighting
should be lower 10 lux. Try to isolate adj. area into dark
surrounding.
(2) Probe location: Color Analyzer (CA-210) probe should be
within 10cm and perpendicular of the module surface
(80°~ 100°)
(3) Aging time
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked using no
signal or Full-white pattern.
6.1.2. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(2) Adj. Computer(During auto adj., RS-232C protocol is
needed)
(3) Adjust Remocon
(4) Video Signal Generator MSPG-925F 720p/204-Gray
(Model:217, Pattern:49)
→ Only when internal pattern is not available
※ Color Analyzer Matrix should be calibrated using
CS-1000
6.1.3. Equipment connection MAP
6.1.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj
RS-232C COMMAND
Explanation
CMD
DATA
ID
Wb
00
00
Begin White Balance adj.
Wb
00
ff
End White Balance adj.
(internal pattern disappears )
Ex) wb 00 00 -> Begin white balance auto-adj.
wb 00 10 -> Gain adj.
ja 00 ff -> Adj. data
jb 00 c0
...
...
wb 00 1f -> Gain adj. complete
*(wb 00 20(start), wb 00 2f(end)) -> Off-set adj.
wb 00 ff ->End white balance auto adj
(2) Adjustment Map
Applied Model : 32/37/39/42/47LP645H-UA,
32/37/39/42LP620H-UA
Adj. item
Command
(lower case ASCII)
Data Range
(Hex.)
Default
(Decimal)
CMD1
CMD2
MIN
MAX 172
Cool
R Gain
j
g
00
C0
172
G Gain
j
h
00
C0
192
B Gain
j
i
00
C0
64
R Cut
64
G Cut
64
B Cut
192
Medium
R Gain
j
a
00
C0
192
G Gain
j
b
00
C0
192
B Gain
j
c
00
C0
64
R Cut
64
G Cut
64
B Cut
192
Warm
R Gain
j
d
00
C0
192
G Gain
j
e
00
C0
172
B Gain
j
f
00
C0
64
R Cut
64
G Cut
64
Color Analyzer
Computer
Pattern Generator
※
Signal Source
Probe
RS-232C
RS-232C
RS-232C
※
If TV internal pattern is used, not needed
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6.1.5. Adjustment method
6.1.5.1 Auto adj. method
(1) Set TV in adj. mode using POWER ONLY (P-ONLY) key
(2) Zero calibrate probe then place it on the center of the
Display
(3) Connect Cable(RS-232C)
(4) Select mode in adj. Program and begin adj.
(5) When adj. is completed (OK Sing), check adj. status of pre
mode (Cool, Medium, Warm)
(6) Remove probe and RS-232C cable to complete adj.
▪ W/B Adj. must begin as start command “wb 00 00” , and
finish as end command “wb 00 ff”, and Adj. offset if need
6.1.5.2. 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 -> EZ adjust using adj. R/C -> 6. White-
Balance then press the cursor to the right (KEY►).
(When KEY(►) is pressed 204 Gray(80IRE) internal
pattern will be displayed)
(4) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
(5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature.
▪ If internal pattern is not available, use RF input. In EZ Adj.
menu 6.White Balance, you can select one of 2 Test-pattern:
ON, OFF. Default is inner(ON). By selecting OFF, you can
adjust using RF signal in 204 Gray pattern.
▪ Adj. condition and cautionary items
(1) Lighting condition in surrounding area
Surrounding lighting should be lower 10 lux. Try to isolate
adj. area into dark surrounding.
(2) Probe location : Color Analyzer (CA-210) probe should be
within 10cm and perpendicular of the module surface (80°~
100°)
(3) Aging time
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked using no
signal or Full-white pattern.
6.1.6. Reference (White Balance Adj. coordinate and
color temperature)
▪ Luminance: 204 Gray, 80IRE
** LGD Module (over 26inch)
▪ Standard color coordinate and temperature using
CA-210(CH 14)
Model
Coordinate
Temp
△
uv
X
Y
Cool
0.271±0.002
0.270±0.002
13000K
-0.003
Medium
0.285±0.002
0.293±0.002
9300K
0.0000
Warm
0.313±0.002
0.329±0.002
6500K
0.0000
▪ Standard color coordinate and temperature using
CA-210(CH 14)
(1) ROW Direct LED models (applied only LGD Module) in
LGERS
(2) ROW Direct LED models (applied only LGD Module) in
LGEKR (GUMI)
(3) ROW Direct LED models (applied only LGD Module) in
LGEKR (GUMI for Winter Season)
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