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1. Application Range
This specification sheet is applied to all of the LED TV with
LM91P chassis.
2. Designation
(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 °C ± 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 100-220 V,
50/60Hz.
(5) The receiver must be operated for over 5 minutes prior to
the adjustment when module is in the circumstance of
above 15 °C.
► In case of keeping module is in the circumstance of 0
°C, it should be placed in the circumstance of above 15
°C for 2 hours.
► In case of keeping module is in the circumstance of
below -20 °C, it should be placed in the circumstance of
above 15 °C for 3 hours.
* Caution
When a still image is displayed for 20 minutes or longer
(especially where W/B scale is strong. Digital pattern 13ch
and/or Cross hatch pattern 09ch), there can some
afterimage in the black level area.
3. White Balance Adjustment
3.1. Overview
3.1.1. 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
1) Surrounding Temperature: 25 °C ± 5 °C
2) Warm-up time: About 5 Min◦
3) Surrounding Humidity: 20% ~ 80%
4) Before White balance adjustment, Keep power on
status, don't power off
3.1.2. 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 10 cm and perpendicular of the module surface.
(80°~ 100°)
(3) Aging time
1) After Aging Start, Keep the Power ON status during 5
Minutes.
2) In case of LCD, Back-light on should be checked using
no signal or Full-white pattern.
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
ADJUSTMENT INSTRUCTION
- 7 -
3.2. 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 Remote control
(4) Video Signal Generator MSPG-925F 720p/204-Gray
(Model: 217, Pattern: 49)
* Color Analyzer Matrix should be calibrated using CS-1000.
3.3. Equipment connection
Probe
* If TV internal pattern is used, not needed
3.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj.
RS-232C COMMAND
CMD
DATA
ID
wb
00
00
Begin White Balance adjustment
End White Balance adjustment
wb
00
ff
(internal pattern disappears )
(2) Adjustment Map
Command
Adj. item
(lower caseASCII)
CMD1
R Gain
j
G Gain
j
B Gain
j
Cool
R Cut
G Cut
B Cut
R Gain
j
G Gain
j
B Gain
j
Medium
R Cut
G Cut
B Cut
R Gain
j
G Gain
j
B Gain
j
Warm
R Cut
G Cut
Co lo r Analyzer
RS -232C
Co m p ut er
RS -232C
RS -232C
Pat t ern Generat o r
Signal Source
Explantion
Data Range
(Hex.)
(Decimal)
CMD2
MIN
MAX
g
00
C0
h
00
C0
i
00
C0
a
00
C0
b
00
C0
c
00
C0
d
00
C0
e
00
C0
f
00
C0
LGE Internal Use Only
Default
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