R B 1 / R B2 G A I N Adjustmen T; Set-Up Adjustment; Y Level Adjustment - Sony CCD-M8U Service Manual

1 - 1 8. R B1 / R B2 GAI N ADJ U STM E NT
Equipment required:
Oscilloscope
VC-5 Board
C H I TP804 ( RBo)
( a )
C H2 TP805 ( RB 1 )
Mode - ADD. Polarity - INV
Object: White Pattern ( see Fig. 1 -23)
Adjust Procedure:
I ) Set the oscilloscope probe a t ( a). a n d by turning R822 on
MX-2 Board. adjust for straightly linear waveform ( see Fig.
1 -25).
2)
Next. set the oscilloscope probe at ( b). and by turning
RV824 on MX-2 Board. adjust for a straightly linear
waveform ( see Fig. 1 -25).
1 - 1 9 . SET- U P ADJ U STM ENT
Equipment required:
Oscilloscope
VC-6 Board TP952
Object: Totally Bl ack ( Lens covered with a black cap)
Adjusting Procedure:
By turning RV88 3 on E D- 1 1 Boa rd.
adjust the signal level at 65±5 mVp-p ( see Fig. 1 -26).
Fig. 1-26
C H I TP804 ( RB11)
( b)
CH2 TP806 ( RB')
Fig. 1-25
Median
Black Level
Median
Pedestal
1 -20.
Y LEVE L ADJUSTMENT
Equipment required:
Object:
Color Bar Chart ( i n Sta n d a rd Pattern Fra me)
Adjusting Procedure:
adjust the signal level at
1 -2 1 . A P E RTU R E ADJ U STM ENT
Equipment required:
Object:
Color Bar Chart ( i n Standard Pattern Frame)
Adjusting Procedure:
1 ) Preset RV888 on ED- 1 1 Board at its mechanical center.
and RV889 at its extreme counterclockwise position ( see
Fig. 1 -28).
Mechanical Extreme
Center
-20 -
Oscilloscope
VC-6 Board TP952
By w rn i ng RV88 1 on ED-I I Board.
7 20�J8
m Vp-p (see Fig.
Median
White Level
Median
Pedestal
Fig. 1-27
Oscilloscope
M E- I Board TP7 1 I
Board
ED- 1 1
Counterclockwise
Position
Fig. 1-28
1 -2 7).