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If curing is apparent, readjust the height of posts.
7.2.2.3. A/C HEAD HEIGHT ADJUSTMENT
The height of the A/C Head replacement part is preset at the factory.
Purpose:
To be sure the tape runs properly along the Control Head.
Symptom of Misadjustment:
If the control signal is not properly picked up, Servo Operation
can not be achieved.
1. Connect the oscilloscope to Pin 25 (PB Control signal) on the TP
Adjustment P.C.B.
2. Play back the Alignment Tape (VFMW0001C)
3. Confirm that the Sub Control Signal is 500 mV±200 mV. If not,
slightly and equallyadjust Screw A, Screw B, and Screw C on the A
/C Head Unit to achieve the sub control signal level of 500 mV±200
mV.
(Sub Control Signal level will decrease when rotating screws
clockwise, and increase when rotating screws counterclockwise.)
Fig. M3-3
Fig. M4-1
Fig. M4-2
85
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