Service manual

22
22-1
22-2
20F630
CU20F630
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
SUB-PICTURE
V01 STEP RANGE 0-127
I
2
C BUS CONTROL
OPTION SET UP, BUS SET UP, SCREEN, WHITE BALANCE, SUB-BRIGHTNESS
WINDOW PATTERN 120V CRT SCREEN DISPLAY.
1) LET THE GUN POINT AT WHITE POSITION (AS ATTACH DRAWING),
ADJUST V01 BUS DATA UNTIL BRIGHTNESS Y=150 cd/m2.
NOTE: ALLOWABLE DATA FOR V01 IS >= 90, EVEN Y CAN’T MATCH
THE SPEC
[VOLTAGER CONFIRMATION] BRIGHTNESS Y=150 cd/m2
US14
WHITE
ADJUSTMENT ITEM ADJUSTMENT POSITION CONTROL PRE-ADJUST REQUIREMENT CONTENT INPUT CONDITION OUTPUT
ADJUSTMENT PROCEDURE
1) GET IN Y-MUTE FUNCTION BY R/C. 2) ADJUST THE V02 BUS DATA TO GET A WAVEFORM AS BELOW. 3) DISABLE THE Y-MUTE **PLS TAKE NOTE THAT SERVICE MODE DATA F53 NEED TO SET +8
SUB-TINT
V02 STEP RANGE 0-127
I
2
C CONTROL
OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC US 10 CH HALF COLOR BAR PATTERN 120V B-AMP TR BASE (TP853) CONFIRM WITH OSCILLOSCOPE
[CONFIRMATION]
B-AMP BASE (TP853) MUST BE IN STEPPING LEVEL