LG EA71G, Service Manual

Page: 13 / 95

- 13 -
LGE Internal Use Only Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
3.8. Camera Port Inspection
(1) Objective : To check PCBA’s CAMERA Port.
(2) How-it-works
1) Connect the PCBA like below Picture.
2) Send specific RS-232C Command for displaying Camera
Preview.
* CAMERA need to be status of Slide up
3) RS-232C Command
RS-232C COMMAND
Explanation
CMD DATA ID
Ai 00 23 Camera Function Start.
Ai 00 24 Camera Function End.
4. SET assembly adjustment method
4.1. Input Area-Option
4.1.1. Profile
Must be changed the Area option value because being
different of each Country’s Language
and signal Condition.
4.1.2. Equipment
adjustment remote control.
4.1.3. Adjustment method
- The input methods are same as other chassis.(Use
IN-START Key on the Adjust Remocon.)
Refer to Job Expression of each main chassis ass’y
(EBTxxxxxxxx) for Option value.
4.2. Adjustment of White Balance
* 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.
▪ Purpose : Adjust the color temperature to reduce the
deviation of the module color temperature.
▪ Principle : To adjust the white balance without the saturation,
Fix the one of R/G/B gain to 192 (default data) and
decrease the others.
▪ Adjustment mode : Three modes – Cool / Medium / Warm
* Required Equipment
▪ Remote controller for adjustment
▪ Color Analyzer : CA100+ or CA-210 or same product (should
be used in the calibrated ch by CS-1000)
- LCD TV : CH-9
- PDP TV : CH-10
- White LED TV : CH-14
- ALEF : CH-18
- RGB LED(MNT) : CH-16
- Auto W/B adjustment instrument(only for Auto adjustment)
4.2.1. Adjustment of White Balance
(For Automatic Adjustment)
Connecting diagram of equipment for measuring (For
Automatic Adjustment)
(1) Set TV in ADJ mode using P-ONLY key (or POWER ON
key)
(2) Place optical probe on the center of the display
(3) It need to check probe condition of zero calibration before
adjustment.
(4) Connect RS-232C Cable
(5) Select mode in ADJ Program and begin a adjustment.
(6) When WB adjustment is completed with OK message,
check adjustment status of pre-set mode (Cool, Medium,
Warm)
(7) Remove probe and RS-232C cable.
▪ W/B Adj. must begin as start command “wb 00 00” , and
finish as end command “wb 00 ff”, and Adj. offset if need
4.2.2. Adjustment of White Balance
(for Manual adjustment)
4.2.1.1. 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
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.
4.2.2.2. 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/216-Gray
(Model: 217, Pattern: 78)
Color Analyzer
Computer
Pattern Generator
RS-232C
RS-232C
RS-232C
Probe
Signal Source
* If TV internal pattern is used, not needed