Sony BVH-2000, Operation And Maintenance Manual

Page: 410 / 505

10-4. TAPE SPEED ADJUSTMENT
Preliminary Information
This is the adjustment the mode.
This adjustment required when R V9 the CD-17
board has been adjusted by mistake, R V9 or the
capstan motor has been replaced.
C. This adjustment is to set the FG pulse of the capstan
motor to the snecitred rrecuencv
Note:
There is another way of performing the tape
speed adjustment by playing back the alignment
tape in the test mode B, but this adjustment
should not be used because
the alignmen t tape
may be transformed with use.
The rotating of the capstan could be
UU.I'U.:lI~'-'u.
by setting the FG pulse to the specified frequency
but the tape speed is also in proportion to the diameter
of the capstan. If the capstan is worn out extremely, it
happens that the tape speed may not correctly
E. When the servo is not locked in the PLAY mode even if
this adjustment
has been performed, check the pinch
roller pressure using sequence established in steps 10
to 14 in Section 3 -1 7, then Section 11 Servo
For the replacement of the capstan motor, refer to
Section 3-1 7.
Check
Connect the coun ter to TP6.
2. Thread a tape and record a video signal.
3. While recording, check that the counter reads:
839.4 Hz ± 0.3 Hz; for NTSC/PAL-M
825.0
±
Hz; for
If necessary, adjust R V9 on the CD-I 7 board.
BVH-2000( U/C)/PS/PM
BVH-2180(U/C)/PS/PM
BVH-2500(U/C)/P
CD-17 BOARD
TP6
RV90@@@O
@@
:0
o
e
o
0 0
o
10-9
Fig. 10-10. Tape Speed Adjustment
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