Sony TC-377 Service Manual page 11

record head
A. Tape Guide (left) Adjustment
tape guide {(L)
lock
screw
35°
playback head
_, record head —
Procedure:
Thread a tape and place unit in playback mode.
Loosen the lock screw and align the upper edge
of the erase head core and that of the tape by
turning tape guide (L).
Turn tape guide (L) clockwise by approx-
imately 35 degrees from the position obtained
in the preceding step so that the upper edge
of the tape is approximately 0.05 mm (2 mil)
lower than the upper edge of the erase head
core,
Fix the tape guide with the lock screw.
Adjustment Location:
zenith adjusting
screw -
zenith adjusting
screw
B. Record and Playback Head Preadjustment
(Rough adjustment for Playback Head Angle
Adjustment and Playback Head Azimuth Adjust-
ment) :
Note: This adjustment and the following adjustments (Play-
tape guide {Lj
* ae see
back Head Angle Adjustment and Playback Head
Azimuth Adjustment) should be repeated alternately
several times.
tape guide (R)
erase head record head Playback head
= [= S )
0.025 mm
Procedure:
if
Align the upper edges of record and playback
head cores and that of the tape by evenly
turning the record and playback head height
adjusting screws.
Turn record and playback head height adjusting
screws clockwise by approximately 15 degrees
so that the upper edges of record and playback
head cores are 0.025 mm (1 mil) lower than
that of the tape and memorize the angle of
turns.
Turn zenith adjusting screws by the same angle
of turns to the same direction of record and
playback head height adjusting screws.
Thread SONY tape super 150 or PS-2 and place
- unit in playback mode at 19 cm/s (7% ips).
Make the tape loose a little by pushing the
tension regulator arm pin in the direction
shown by arrow and then adjust playback head
and record head zenith adjusting screws to
obtain the reflection of light as shown.
tension regulator
arm pin
reflection
of light