Sanyo PLV-Z4 Service Manual page 56

Electrical Adjustments
c
Video signal center adjustment
Equipment Digital voltmeter
Input mode Computer [RGB(Analog)]
Image mode Powerful
Input signal 16-step gray scale computer signal
(720p format)
1. Enter the service mode.
2. Change data values for each test points to adjust the
video signal center voltage (VMID).
Item no. Test Point
2 - 0 TPVG
2 - 1 TPVB
2 - 2 TPVR
v
Reference adjustment
Equipment Digital voltmeter
Input mode Computer [RGB(Analog)]
Image mode Powerful
Input signal 16-step gray scale computer signal
(720p format)
1. Enter the service mode.
2. Change data value for each test points to adjust the
video signal reference voltage (VREF).
Item no. Test Point
2 - 3 TPREFG
2 - 4 TPREFB
2 - 5 TPREFR
Adjustment value
7.0
±0.05Vdc
7.0
±0.05Vdc
7.0
±0.05Vdc
Adjustment value
9.5
±0.05Vdc
9.5
±0.05Vdc
9.5
±0.05Vdc
b
Sub gain adjustment
Equipment Oscilloscope
Input signal 16-step gray scale signal
5-a Input mode Computer [RGB(Analog)]
Image mode Powerful
Input format 720p computer signal
5-b Input mode Video
Image mode Powerful
Input format NTSC composite video signal
5-c Input mode Component_1
Image mode Powerful
Input format 480i component signal
5-d Input mode Component_1
Image mode Powerful
Input format 480p component signal
5-e Input mode Component_1
Image mode Powerful
Input format 720p component signal
5-f Input mode Component_1
Image mode Powerful
Input format 1080i component signal
1. Enter the service mode.
2. Change data values for each test points to adjust the
waveform "a" to be minimum amplitude in each
mode.
Item no. Test Point
106 - 0 TP35G
106 - 1 TP35B
106 - 2 TP35R
(a)
-56-
White Level