Service manual

Page 27 of 64
2). Low brightness adjustment：VG-828 is set TIM20&PAT936（the level of full white is equal to 0.7070），measure the
temperature of the currently picture by Chroma7100,then compare the measured value and the standard value, if over the
specification, then press the button MTS,9,5,1,and display on the Remote control ,and in the factory mode ,adjust the high
brightness, so that make the value meet specification.
The method of adjusting is as below:
Adjust the value of R Contrast,B Contrast, so that meet the temperature specification. The value of G Contrast keep
fixed in adjustment period.
3). After adjustment low brightness，then set VG-828 as TIM954/PAT936（the value of full white is 0.7 255）,measure the high
brightness temperature by Chroma7100 and adjust in the factory mode if out specification. The adjust method is as step 1.
4). Set VG-828 as TIM20/PAT936（he value of full white is 0.7 70）, measure the low brightness temperature by Chroma7100
and adjust in the factory mode if out specification. The adjust method is as step 2.
Remark: Because the high level brightness adjustment and low level brightness adjustment will infect each other , so
that need adjust again and again until both the high brightness and low brightness’s color temperature meet
specification.
z D-SUB（RGB）Adjustment:
1). Switch PDP input source to D-SUB（RGB） mode, to be sure temperature is set standard, brightness is set 50 and contrast
is set 50.
2). Set Chroma2326 as TIM4/PAT105 mode, adjust high brightness（the value of full white is 0.7255）.
3). Set Chroma2326 as TIM183/PAT105, adjust low brightness（the value of full white is 0.7 70）; and the adjust method is ad
HDTV’s.
z AV mode Adjustment
1). Switch PDP input source to AV 1 mode, to be sure temperature is standard, brightness is 60 and contrast is 65, and correct it
if the currently situation is not meet it.
2). Set VG-828asTIM946/PAT936 mode, then adjust high brightness temperature（full white level is set 0.7255）.
3). Set VG-828 as TIM21/PAT936 mode, then adjust low brightness temperature（full white level is set 0.7 100）; and the
adjust method is ad HDTV’s.After above mode adjustment, then press the MENU button and quit from the factory mode.
Remark： (1). Adjust AV mode: choose “LINER” and adjust the value of BRIGHTNESS,CONTRAST.
(2).Only need to record the value of R,G,B after finished adjustment, and not need to record the value if not
adjust the value of RGB when the temperature meet specification.
5-3. Color temperature specification:
White balance adjust specification： x=275±15, y=283±15 (color temperature: standard )
Notice: In order to avoid modifying color temperature value, not to enter into the factory mode after having finished the color
temperature adjustment.