LG RD-JT40/41 Service Manual

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

Timing

Pattern

Item

Criteria

Mode

 

 

 

 

 

 

 

 

 

Composite

*

NTSC

PT2

Gray

0-100%

Video

 

(H: 15.73KHz,

Master Pattern

H&V Res.

1 Line

 

 

29.96Hz, I)

 

Color

Hue, Sat need correct

 

 

 

 

 

Color Noise Acceptable

 

 

 

 

Smear

Not acceptable

 

 

 

 

Linearity

As optical spec

 

 

 

 

Jitter, Swing,

Only Color Noise

 

 

 

 

Snack, Ring,

Acceptable

 

 

 

 

Cross-talk

 

 

 

 

PT976

Gray & Color

64 Step

 

 

 

64Gray & Color

Check

 

 

 

 

PT863

EM Character

EM distinguish

 

 

 

Text

 

Color Noise Acceptable

 

 

 

Movie

Video Essential

 

 

 

PAL

PT2

Gray

0-100%

 

 

(H: 15.63KHz,

Master Pattern

H&V Res.

1 Line

 

 

25Hz, I)

 

Color

Hue, Sat need correct

 

 

 

 

 

Color Noise Acceptable

 

 

 

 

Smear

Not acceptable

 

 

 

 

Linearity

As optical spec

 

 

 

 

Jitter, Swing,

Only Color Noise

 

 

 

 

Snack, Ring,

Acceptable

 

 

 

 

Cross-talk

 

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