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LG RD-JT40/41 Service Manual
40
15. Final Assembly Alignment Procedure
Unless other specified, all alignments should meet the following conditions:
1. All power on and power off condition should be last for more than 5 minute. i.e. no power on is
permitted if UUT(Unit under test) had not been power off and last for more than 5 minute since
last power on.
2. Brightness and contrast should be measured only 5 minute or more after lamp is on.
3. UUT should be placed at a distance ranges from 1.5 to 5 meter.
4. Applied timing should be 1024*768 @65Hz (XGA); 800*600@60Hz (SVGA)
Before test, be sure the following configurations are done properly:
1. Turn off light in test chamber.
2. Test chamber condition as per ANSI IT7.215-1992.
3. Connect DSUB cable to Graphics port of UUT.
4. Connect stereo input to stereo input of UUT.
5. Connect RCA terminal to Video input of UUT.
6. Connect S terminal to S-Video input of UUT.
7. Connect AC power cord to UUT.
(A) Video EE Check
Equipment: VG828, DVD Player
Aspect Ratio: 4:3
Channel
Prime
Mode
Timing Pattern Item Criteria
Gray 0-100%
H&V Res. 1 Line
Color Hue, Sat need correct
Color Noise Acceptable
Smear Not acceptable
Linearity As optical spec
PT2
Master Pattern
Jitter, Swing,
Snack, Ring,
Cross-talk
Only Color Noise
Acceptable
PT976
64Gray & Color
Gray & Color
Check
64 Step
PT863
Text
EM Character EM distinguish
Color Noise Acceptable
* NTSC
(H: 15.73KHz,
29.96Hz, I)
Movie Video Essential
Gray 0-100%
H&V Res. 1 Line
Color Hue, Sat need correct
Color Noise Acceptable
Smear Not acceptable
Linearity As optical spec
Composite
Video
PAL
(H: 15.63KHz,
25Hz, I)
PT2
Master Pattern
Jitter, Swing,
Snack, Ring,
Cross-talk
Only Color Noise
Acceptable