Service manual

21
20U-FS1
CU20FS1
21-1
21-2
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTROL PRE-ADJUST
REQUIREMENT
CONTENT
INPUT
CONDITION
OUTPUT
ADJUSTMENT
PROCEDURE
1) IN SERVICE MODE, SET V04&V11&V12&V13 TO 127; V14&V15 TO
64, GET IN Y-MUTE BY R/C AND SET V19 TO “1”, PICTURE APPEAR
IN CUT-OFF CONDITION
2) ADJUST THE SCREEN SO THAT CUT-OFF LINE APPEAR IN LOW
BRIGHT, THEN JUDGE THAT WHETHER THE CUT-OFF LINE APPEAR
IN RED OR GREEN OR BLUE COLOR, IN THIS CONDITION V11=R-
CUTOFF, V12=G-CUTOFF, V13=B-CUTOFF, FIX THE DATA OF THE
COLOR APPEAR IN CUTOFF LINE AND USE R/C TO ADJUST THE
OTHER TWO CUT-OFF DATA SO THAT CUT-OFF LINE COLOR BE-
COME WHITE.
3) TURN THE SCREEN VR OF FBT SO THAT CUT-OFF LINE JUST DIS-
APPEAR AND USE R/C TO SET V19 TO “0”, NEXT DISABLE THE Y-
MUTE SO THAT PICTURE APPEAR IN NORMAL MODE.
SCREEN
V11,V12,V13 STEP RANGE 0-255
I
2
C CONTROL
OPTION SET UP, BUS SET UP
WINDOW PATTERN OR US4CH LION HEAD
120V
CONFIRMATION ON CRT DISPLAY
ADJUSTMENT
ITEM
ADJUSTMENT
POSITION
CONTROL PRE-ADJUST
REQUIREMENT
CONTENT
INPUT
CONDITION
OUTPUT
ADJUSTMENT
PROCEDURE
WHITE BALANCE
V14,V15,V11,V12,V13 STEP RANGE 0-127, 0~255
I
2
C BUS CONTROL
OPTION SET UP, BUS SET UP, SCREEN
23CH 501RE WINDOW PATTERN
120V
CRT SCREEN DISPLAY.
[VOLTAGE CONFIRMATION]
1) WHITE (HIGH BEAM)
FIRST LET THE GUM POINT AT BLACK POSITION (AS DRAWING
ATTACH), ADJ V04 UNTIL BRIGHTNESS Y BECOME 5 cd/m2, THEN
LET THE GUN POINT AT WHITE POSITION (AS DRAWING ATTACH),
ADJUST V01 UNTIL BRIGHTNESS Y BECOME 150 cd/m2, ADJUST
THE BUS DATA OF V14 (R DRIVE), V15(B DRIVE) UNTIL THE AXIS
OF COLOR TEMPERATURE BECOME X=0.273, Y=0.280
2) BLACK (LOW BEAM)
LET THE GUN POINT AT BLACK POSITION, IF THE VALUE SHIFTED
AWAY FROM THE DATA ADJUSTED IN STEP 1), ADJUST AGAIN THE
TWO SERVICE DATA WHICH HAVE CHOSEN AT SCREEN ADJUST
SO THAT TO OBTAIN THE SIMILAR AXIS AS ABOVE.
*WARNING: DO NOT DISTURB THE MINI STEP GUN DATA DURING
THIS ADJUSTMENT.
**REPEAT STEP 1), 2) TO GET A REGULATED POSITION.
[CHECKING CONFIRMATION]
X=0.273, Y=0.280 (11,600
°K + 1 MPCD)
BLACK
US14
WHITE