LG 37LH250H Service Manual page 15

• HDMI II [C/S: 1DAA]
• RGB [C/S: 71FF]
6. Final Assembly adj.
6.1 White Balance adj.
6.1.1 Overview
•W/B adj.: Objective & How-it-works
- Objective: To reduce each Panel's W/B deviation
- 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.
6.1.2 Equipment
1) Color Analyzer : CA-210 (NCG: CH 9 / WCG: CH12 /LED
Module:CH14)
2) Adj. Computer (During auto adj., RS-232C protocol is
needed)
3) Adj. R/C
4) Video Signal Generator MSPG-925F 720p/216Gray
(Model:217, Pattern:78)
-> Only when internal pattern is not available
•Color Analyzer Matrix should be calibrated using CS-1000
Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes
6.1.3 Equipment connection map
Probe
6.1.4 Adj. Command (Protocol)
•Protocol
<Command Format>
START 6E A 50 A
- LEN: Number of Data Byte to be send
- CMD: Command
- VAL: FOS Data
- CS: Checksum of sent Data
- A: Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]
RS-232C COMMAND
[CMD ID DATA]
Wb 00 00
Wb 00 10
Wb 00 1f
Wb 00 20
Wb 00 2f
Wb 00 ff
•Adj. Map
- Applied model:
Item
Cool R Gain
G Gain
B Gain
R Cut
G Cut
B Cut
Medium R Gain
G Gain
B Gain
R Cut
G Cut
B Cut
Warm R Gain
G Gain
B Gain
R Cut
G Cut
- 15 -
Color Analyzer
RS-232C
# Pattern Generator
Signal Source
* If TV internal pattern is used,not needed
LEN A 03 A CMD A 00 A
Explanation
Begin White Balance adjust.
Begin Gain adjust (internal white pattern)
End Gain adjust
Begin Offset adjust (internal white pattern)
End Offset adjust
End White Balance adjust(internal pattern
disappears )
Command Data Range
(lower case ASCII) (Hex.)
CMD1 CMD2 MIN MAX
j g 00 C0
j h 00 C0
j i 00 C0
j a 00 C0
j b 00 C0
j c 00 C0
j d 00 C0
j e 00 C0
j f 00 C0
LGE Internal Use Only
RS-232C
Computer
RS-232C
VAL A CS A STOP
Default
(Decimal)
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