Aberration Adjustment; Horizontal Amplitude Adjustment (Vf-129 Board) - Sony DCR-TRV120 Service Manual

1-4-4. Aberration Adjustment

Mode VTR stop
Signal Dot pattern
Specified Value b1
b2
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.
a2
b2
Fig. 5-1-17
2 × a1
0.8 × a2
a1
b1

1-4-5. Horizontal Amplitude Adjustment (VF-129 board)

Mode
Signal
Adjusting Element
Specified Value
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).
6%
12.5%
SOL901
Open
Short
VF-129 BOARD
W901
RV904
F.B.T
5-26
Playback
Hi8/standard 8 mm alignment tape :
For checking operation
(WR5-8NSE(NTSC))
(WR5-8CSE(PAL))
Monoscope section
C909 (SOL901)
12 ± 6%
100%
6%
12.5%
Size H
Small
Big
Fig. 5-1-18
RV903
C909
SOL901
IC901
CN902