LG 60PB4DA Service Manual page 9

6. Adjustment of White Balance
6-1. Required Test Equipment
(1) Color Analyzer : CA-210 (CH 9)
=> To adjust color temperature of PDP, CS-1000 is the
Color Analyzer(CA-210) and should be set to use CH 9
in which white, red, green, and blue color are corrected.
Conduct the adjustment according to the coordinates for
White Balance adjustment in the table below.
(2) Computer for adjusting (necessary for the automatic
adjustment, possible to communicate with the RS-232C,
Baud Rate : 115200)
(3) Video Signal Generator MSPG-925F 720p, 216Gray
(Model :217, Pattern 78)
6-2. Connection Diagram of Equipment
for Measuring
(Automatic Adjustment)
(internal pattern)
Connection Diagram for Internal Pattern
Connection Diagram for HDMI Input
6-3. White Balance Adjustment Method
Basically it uses the internal pattern but when internal pattern
is not possible, you can select HDMI input for adjustment.
Through the option at the most bottom part of the Ez Adjust
Menu 7.White Balance menu, you can select NONE, INNER
and HDMI, and the default is set to INNER. When the
adjustment cannot be done with the internal pattern, you can
select HDMI input for adjustment.
For manual adjustment, press the ADJ KEY of the adjustment
R/C to enter Ez Adjust 7.White-Balance, and the pattern is
automatically displayed. (When you set the Option to INNER,
the default is always set to INNER)
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Only for training and service purposes
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ADJUSTMENT INSTRUCTIONS
- 9 -
(1) Connect the set according to the internal pattern or HDMI
input in accordance with measuring device connection
diagram.
(2) Set the Baud Rate of RS-232C to 115200. It is set to
115200 as default.
(3) Connect the RS-232C Cable to the set.
(4) Connect the HDMI Cable to the set. (Limited to the set with
HDMI option)
(5) Select and adjust the model applicable to PA75C chassis
from the adjuster.
[RS-232C command used for the automatic adjustment]
RS-232C COMMAND Meaning
[CMD ID DATA]
White Balance Adjustment Start
wb 00 00
Gain Adjustment Start(Internal white pattern)
wb 00 10
Gain Adjustment End
wb 00 1f
Offset Adjustment Start(Internal white pattern)
wb 00 20
Offset Adjustment End
wb 00 2f
White Balance Adjustment End
wb 00 ff
(Disappear Internal pattern)
Wb 00 00-----white balance Automatic Adjustment Start
Ô
Wb 00 10-----Gain Adjustment start (Internal pattern)
Ô
Ja 00 ff------Adjustment Data
Ô
Jb 00 c0
Ô
...
Ô
Wb 00 1f-----Gain Adjustment End
Ô
*(wb 00 20(Start), wb 00 2f(End))----- When adjust Off-set
Ô
Wb 00 ff------White Balance Automatic Adjustment End
Ô
(Disappear Inside pattern)
[Adjustment Map]
RS-232C COMMAND
[CMD ID DATA]
Cool Mid Warm
R Gain Jg Ja Jd
G Gain Jh Jb Je
B Gain Ji Jc Jf
R Cut
G Cut
B Cut
CENTER
(DEFAULT)
Min Max
Cool Mid Warm
00 184 192 192 192
00 187 183 159 192
00 192 161 95 192
64 64 64 127
64 64 127
64
64 64 64 127
LGE Internal Use Only