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3.1 Adjustment
3.1.1 Tape Speed Adjustment
(this adjustment is necessary if main motor was replaced.)
(a) Tools required
Test tape ABEX TCC-112 (frequency 3 kHz)
Ceramic screwdriver (tip 1.2mm)
Frequency counter
Radio set
(b)Adjustment
Assemble the tape deck into the radio set. (As the tape
speed will vary a little depending on the radio set, the
speed should be adjusted with the radio set in which the
deck is actually used.)
Connect the output to the frequency counter, and play the
test tape mentioned above with the deck set in FOR-
WARD mode.
Insert a screwdriver into a speed adjusting hole of the
motor, and rotate a little so that its tip enters VR for
adjustment.
Rotating slowly the screwdriver CW or CCW, adjust the
frequency to 3 kHz.
3.1.2 Azimuth Adjustment
(this adjustment is necessary if head was replaced.)
(a) Tools required
Test tape
1 ABEX TCC-153(10 kHz)
2 Mirror tape such as TEAC MTT-902
Screw locking bond
(b) Adjustment
Playing the mirror tape in FWD mode, rotate screw A
and B so as to eliminate a curl at the guides on both
ends of head while looking into the mirror.
Play the tape in REV mode. and make adjustment in the
same manner.
Connect the head output to electronic voltmeter, and
insert the TCC-153 tape. Play the tape in FWD mode,
and search the point where the output becomes maxi-
mum while rotating the screwA. Then, play the tape in
REV mode, make adjustment in the same manner while
rotating the screwB.
Further, reverse the tape, and in FWD and REV modes
respectively, search the point where the output of L and
R channels becomes maximum.
To lock the screws, apply the bond to periphery of both
screws.
ADJUSTMENT
D40-1132-05
19
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