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3-2-2. Tape Transport System Adjustment
1) Pm-adjustment
When parts are replaced, perform the required adjustments
by referring to the procedures for the tape transport
system. When parts are replaced, the tape path may be
changed.
First run a T-l 60 tape and be sure excessive tape wrinkle
does not occur at any tape guide.
1. If tape wrinkles at the S. T-guide rollers, turn
the S,T-guide rollers until the wrinkle drsappears.
2. If tape still wrinkles at the tape gurde,
do the tilt adjustment of the A/C head.
2) Adjustment procedures
1. A/C head assembly adjustment
Test Point
TP302 (Envelope)
TP804 (Audio Out)
TP202 (H’D SW Pulse
TP201 (Control Pulse)
Test Tape : ST-N1
(Blank Tape (T-160)
3
Fig.
Location of Test Point (Main PCB)
a. A/C head height adjustment
1. Run the alignment tape (ST-Nl) In the playback
mode.
2. Observe the surface of the audio head using a
dental mirror.
3. Turn screws(A), (B), (C) clockwise or
counterclockwise until the gap of the lower tape
edge and the lower edge of the control head is
about 0.25 mm. (Refer to Fig. 4. and 5.)
3-4
CCREW (6)
ITU An.11 IST
\
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Fig. 4 Locatron of A/C Head Adjustment Screw
I
Fig. 5 A/C Head Height Adjustment
(BAD)
SCREW(C)
TILT ADJUST
X - POSITION
ADJUST GEAR(E).
HOLE (F)
SCREW(D)
X
POSITION LOCKING
SCREW (A)
HEIGHT ADJUST
AUDIO HEAD
VIDEO TAPE
0 - 0.25mm
CONTROL HEAD
b. A/C head tilt adjustment
1. Playback a T-160 tape and observe the posItron of
the tape at the lower flange of the tape guide.
2. Confirm that there
no curl or wnnkle at the lower
IS
flange of the tape guide, as shown In Fig. 6 (B).
3. If a curls or wrinkle of the tape has occured, slrghtlyturn
the screw (C) tilt adjust on the A/C head ass’y clockwise
until It disappears, as shown in Fig. 6 (B)
4. Reconfirm the A/C head height.
6
Fig.
Tape Guide Check
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