Sony CCD-TRV15, Service Manual

Page: 115 / 253

5-28
Mode Playback
Signal Alighment tape :
For checking operations
(WR5-5NSP (NTSC))
(WR5-5CSP (PAL))
Monoscope section
Specified Value RV904
1-5-6. Vertical Amplitude Adjustment (VF-99 board)
Mode Playback
Signal Alighment tape :
For checking operations
(WR5-5NSP (NTSC))
(WR5-5CSP (PAL))
Monoscope section
Adjusting Element RV903
Specified Value 10
±
3%
Adjusting method:
1) Adjust RV903 so that the vertical direction over scan becomes
10
±
3% (Top and bottom totals).
Fig. 5-1-21.
1-5-7. Brightness Adjustments (VF-99 board)
Adjusting method:
1) Rotate RV904, and adjust so that the bright/dark sections of the
gray scale are displayed correctly. (The bright section should be
unsatisfactory till the cross hatch appears vague in the monoscope
circle. The dark section should be unsatisfactory till the darkest
section and the second darkest section of the gray scale cannot
be differentiated.)
1-5-8. Horizontal Amplitude, Vertical Amplitude, Focus
Check
“1-5-5. Horizontal Amplitude Adjustment” and “1-5-6. Vertical
Amplitude Adjustment” should both satisfy the specified values. If
not, perform the adjustments from the beginning again. In this case,
perform “1-5-7. Brightness, Contrast Adjustments” again.
Moreover, check the focus, and if it found to be vague, perform “1-
5-3. Focus Adjustment” and “1-5-4. Aberration Adjustment”.
C909
SOL901
RV903
RV904
VF-99 BOARD (SIDE A)