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8-4-7.
Vertical Amplitude Adjustment (VF-27 Board)
Monoscope portion
'Adjustment Element | RV902
Specified Value
643%
Adjustment method:
1)
By tuming RV902, adjust vertical overscan to 6 + 3%
(upper and lower total).
16.5%
3%
16.5%
Fig. 8-47.
8-4-8. | Brightness, Contrast Adjustments
(VF-27 Board)
Mode
Playback
Alignment tape for checking operation
Signal
(WRS-SNSP)
Monoscope portion
Brightness: RV904
Sanere RV903
_|
Adjustment Element
Adjustment method:
1) Adjust RV904 and RV903 alternately until the bright and
dark areas of a gray scale are displayed correctly. (The
bright areas should not be made too bright to avoid a fuzzy
display of the cross-hatches in the monoscope circle, and the
brightness.
of the
dark
areas
should
be such
that
discrimination between the darkest and second darkest area
is possible.)
8-4-9.
Horizontal Amplitude, Vertical Amplitude and
Focus Checks
Values
should
conform
to specifications
given
in 8-4-6.
Horizontal Amplitude Adjustment and 8-4-7. Vertical Amplitude
Adjustment.
If not, readjust accordingly, and repeat 8-4-8.
Brightness, Contrast Adjustments. In this case, focus needs to be
checked.
If the image is not clear, perform
8-4-3. Focus
Adjustment and 8-4-4. Aberration Adjustment.
8-5. ELECTRONIC VIEWFINDER SYSTEM
ADJUSTMENT (TYPE B) (VF-26 BOARD)
8-5-1.
Horizontal Tilt Adjustment
[ Mode
Playback
Alignment tape for checking operation,
Signal
(WRS-5NSP)
Monoscope portion.
Specified Value
See Fig. 8-49.
Adjustment method:
3)
Make a picture horizontal by turning the DY.
4)
Retighten the nut. (Do not tighten excessively.)
Loosening this nut releases the DY
DY (Deflection yoke)
Fig. 8-48.
on
alt ie?
ie
.
Specified value: Image orientation within + 1.5°
of horizontal line.
Horizontal line
Fig. 8-49,
®
©
VSIZE
AFC
CONT BRIGHT
rit"
COC@
Volume array (CP901)
Fig. 8-50.
—274—
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