Mitsubishi Electric WS-48313 Service Manual page 33

MODELS: WS-48313 / WS-48413 / WS-55313 / WS-55413 / WS-65313 / WS-65413
[Video Circuit]
7. Black Level
Measuring
-----
Instrument
Test Point
-----
------
Ext. Trigger
Measuring
------
Range
Input Signal
Monoscope
Input Terminal
Video Input
CIRCUIT ADJUST MODE
Activate ........ MENU-0-3-5-7
Function .................AUDIO
Item No. .................VIDEO
Adjust Data ...........ADJUST
Save Data .... .........ENTER
Exit ..............MENU (twice)
[Video Circuit]
8. Sub Contrast
Measuring
DC ma meter
Instrument
DT connector pins 7 & 8
Test Point
------
Ext. Trigger
Measuring
-----
Range
Input Signal
Grayscale
RF Input
Input Terminal
CIRCUIT ADJUST MODE
Activate ........ MENU-0-3-5-7
Function .................AUDIO
Item No. .................VIDEO
Adjust Data ...........ADJUST
Save Data .... .........ENTER
Exit ..............MENU (twice)
Sub Contrast Current Alignment
WS-48313 / WS-48413
Purpose:
Symptom:
40% 30% 20% 10%
50% 0% 0%
60% 70% 80% 90%
GRADATION SCALE
Purpose
Symptom:
WS-55413 / WS-65313
WS-55313
520 ±10ua
0%
WS-65413
550 ±10ua
Page 33