5-23
100%
6%6%
12.5% 12.5%
RV903
C909
CN902
IC901
F.B. T
W901
RV904
SOL901
Fig. 5-1-16.
Fig. 5-1-17.
SOL901
Open
Short
Size H
Small
Big
VF-129 BOARD
a2 a1
b1
b2
1-4-4. Aberration Adjustment
Mode VTR stop
Signal Dot pattern
Specified Value b1 2 × a1
b2 0.8 × a2
Adjustment method:
1) Adjust the aberration adjustment ring so that the tracing of the
dot satisfies the specified value.
2) If the centering becomes displaced here, perform the centering
adjustment from the beginning again.
1-4-5. Horizontal Amplitude Adjustment (VF-129 board)
Mode Playback
Signal Alignment tape :
For checking system operation
(WR5-5ND(NTSC))
(WR5-5CD(PAL))
Monoscope section
Adjusting Element C909 (SOL901)
Specified Value 12 ± 6%
Adjustment method:
1) Rotate RV903, and adjust the top and bottom side of the
monoscope image to the top and bottom edges of the display.
2) Rotate RV904 so that the brightness is the normal level.
3) Solder or unsolder SOL901 pattern of the H size adjustment
capacitor (C909) to “short” or “open”, so that the horizontal
direction over scan becomes 12 ± 6% (Left and right totals).
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