White Balance Adjustment; Dpm Operation Check; Check Display And Sound; Pcmcia Card Check - LG 28LB45 series Service Manual

4.3. Function Check

4.3.1. Check display and sound

■ Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (SCART/CVBS)
3) COMPONENT (480i)
4) HDMI(PC : 1366 x 768 @ 60Hz)
* Display and Sound check is executed by Remote control
* Caution : Not to push the INSTOP KEY after completion if
the function inspection.

4.3.2. PCMCIA CARD Check

You must adjust DTV 29 Channel and insert PCMCIA CARD
to socket.
- If PCMCIA CARD works normally, video signals will appear
on screen. But it works abnormally, "No CA module" will
appear on screen.
* Caution: Set up "RF mode" before launching products.

4.4. White balance adjustment

(Do not adjust white balance)
(1) Equipment
1) Color Analyzer: CA-210 (LED Module : CH 14)
2) Adj. Computer(During auto adj., RS-232C protocol is
needed)
3) Adjust Remote control
RGB Gains are fixed data for each model.
Insert RS-232C Jack which is connected with PC for White
Balance or equivalent device.
→ Total Assembly line should be check whether the color
coordinate(x,y) data refer to below table were meet or not.
Color coordinate is differ from panel's characteristics of
color temperature. Please check panel characteristics about
color temperature
- Cool Panel
Cool 13,000
Color
Medium 9,300
Temperature
Warm 6,500
Cool Min : 80
Luminance
Medium Min : 80
(cd/m²)
Warm Min : 70
* Note : x,y coordinates are drifted about 0.007 after 30 mins
heat-run. So checking color coordinate within 5-min at
total assembly line, consider x,y coordinates might be
up to 0.007 than x,y target of each color temperature.
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
X=0.276 (±0.04)
K
Y=0.275 (±0.04)
<Test Signal>
X=0.290 (±0.04)
K Inner pattern
Y=0.298 (±0.04)
(204gray,80IRE)
X=0.318 (±0.04)
K
Y=0.334 (±0.04)
K Typ : 110
<Test Signal>
K Typ : 110 Inner pattern
(204gray,80IRE)
K Typ : 110
* Note : Manual W/B process using adjusts Remote control.
1) After enter Service Mode by pushing "ADJ" key,
2) Enter "White Balance" by pushing "►" key at "9. White
Balance".
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option6
6. Country Group
7. Area Option
8. ADC Calibration
9. White Balance
10. 10 Point WB
11. Test Pattern
12 EDID D/L
13. Sub B/C
14. Touch Sensitivity Setting
15. Ext. Input Adjust
16. SPK Lipsync Adjust
17.SPDIF Lipsync Adjust
* When doing Adjustment, Please make circumstance as
below.

4.5. DPM Operation check

■ Measurement Condition: 100~240V@ 50/60Hz
(1) Set Input to HDMI (with Input Label set to PC) and connect
HDMI cable to set - HDMI Mode
(2) Cut off H sync or V sync of signal.
(3) Check DPM operation refer to the below table.
Operating Condition
Sleep mode -
Power S/W On
RGB, HDMI
- 13 -
Whit Balance
Color Temp. ◄ Cool ►
R-Gain
100
G-Gain
104
B-Gain
192
R-Cut 64
G-Cut 64
B-Cut 64
Test-Pattern ON
Backlight
100
Reset To Set
Sync(H/V) Video LED(SET) Wattage(W)
Off/Off Off Amber
LGE Internal Use Only
1