LG 60PZ550 Service Manual page 9

8. White Balance adj.
Model 100 Point WB mode
Non THX Model lists.
50PZ550-UA Only Adjust Medium
60PZ550-UA (Color Temperature)
50PZ540-UB
60PZ540-UB
8-1. Overview
(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.
8-2. Equipment
(1) Color Analyzer : CA-210 (NCG: CH 9 / WCG: CH12 /PDP
Module:CH10)
(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
8-3. Equipment connection map
8-4. Adj. Command (Protocol)
Protocol
O
<Command Format>
- 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]
Copyright ©2011 LG Electronics Inc. All rights reserved.
Only for training and service purposes
WB Adj. Program
Use Matrix
Adj. Program
mode RUN_Matrix_ADJ
( Matrix Type )
RS-232C Command used during auto-adj.
O
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.
8-5. Auto Adj. method
(1) Set TV in adj. mode using POWER On 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 complete (OK Sign), check adj. status per
mode
(Warm, Medium, Cool)
(6) Remove probe and RS-232C cable to complete adj.
- Adj. must begin w/ command "wb 00 00", and end "wb 00
ff" and adj. offset if needed.
- Offset adjust limit value.
Offset Min = 34 (Decimal)
Offset Max = 94 (Decimal)
8-6. Manual adj. method
Dynamic contrast : off
Dynamic color : off
OPC : Off
Energy saving mode : Off
(1) Set TV Picture Mode to Standard and in Advanced
Control, set Dynamic Contrast and Color ' Off ' .
(2) Set TV in adj. mode using POWER On Key
(3) Press ADJ key -> EZ adjust using adj. R/C
(4) Using CH + / - KEY, select 10.TEST PATTERN then press
Enter to place in HEAT RUN mode and wait for 30
minutes.
(4) Zero calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10 cm of the surface.
(5) Press ADJ key -> 7. White-Balance then press the cursor
to the right (KEY
G
(When is pressed Full White internal pattern will be
displayed)
(6) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
(7) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature
(8) Offset Adjust in MEDIUM, WARM 2 modes of color
temperature ( Only THX Model )
V If internal pattern is not available, use HDMI input. In EZ
Adj. menu 7.White Balance, you can select one of 3
options: None, Inner, HDMI. Default is inner. By selecting
HDMI, you can adjust using HDMI signal.
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)
LGE Internal Use Only