Monochrome Electronic Viewfinder System Adjustments; Horizontal Slant Check; Centering Adjustment; Focus Adjustment - Sony DCR-TRV120 Service Manual

1-4. MONOCHROME ELECTRONIC
VIEWFINEDER SYSTEM ADJUSTMENTS
Note: NTSC model: DCR-TRV120/TRV120P
PAL model: DCR-TRV120E/TRV125E/TR8000E/TR8100E

1-4-1. Horizontal Slant Check

Mode Playback
Signal Hi8/standard 8 mm alignment tape :
For checking operation
(WR5-8NSE(NTSC))
(WR5-8CSE(PAL))
Monoscope section
Specified Value ± 1.5°
Adjustment method:
1) Adjust RV904 (BRIGHT) (VF-129 board) so that the CRT can
be seen easily and clearly.
2) Check that the difference between the horizontal line and the
tilt of black mask satisfies the specified value.
Holizontal line
Specified value : The image should be within ± 1.5 °
of the holizontal line.
Fig. 5-1-14
Aberration adjustment

Centering adjustment

Fig. 5-1-15
θ
±1.5 °
θ

Focus adjustment

DY tightening screw
1-4-2. Centering Adjustment
Mode
Signal
Specified Value
Adjustment method:
1) Use the centering adjustment ring and adjust so that the left,
light, top, and bottom sides of the display are uniform. (Refer
to Fig. 5-1-14)
Note: As the centering position changes due to earth
magnetism, rotate it 360° in the horizontal direction,
and adjust with the center section of the modifying
position.
±4%
Adjustment value : ±4%
1-4-3. Focus Adjustment
Mode
Signal
Adjustment method:
1) Adjust the focus ring to obtain the optimum focus. (Refer to
Fig. 5-1-14)
VF-129 BOARD
W901
RV904
F.B.T
5-25
Playback
Hi8/standard 8 mm alignment tape :
For checking operation
(WR5-8NSE(NTSC))
(WR5-8CSE(PAL))
Monoscope section
± 4%
±4%
Fig. 5-1-16
Playback
Hi8/standard 8 mm alignment tape :
For checking operation
(WR5-8NSE(NTSC))
(WR5-8CSE(PAL))
Monoscope section
RV903
C909
SOL901
IC901
CN902