Sony TCS-350 - Electrical Adjustment; Tape Speed Adjustment; Record;playback Head Azimuth Adjustment; Phase Check

TCS-350
3-2. ELECTRICAL ADJUSTMENT
Note: The adjustments should be performed in
the order given in this service manual.
The Adjustments should be performed
for both L-CH and R-CH.
Record/playback Head Azimuth Adjustment
Procedure:
1. Mode:
test tape
P-4-A063
(6.3kHz, —10dB)
playback
Tape Speed Adjustment
Setting:
VOLUME control:
mechanical mid
Procedure:
Mode: playback speed checker
LFM-30
: or
digital frequency PHONES
test
tape
counter
Turn
the
adjustment
screw
for
the
maximum
WS-48A
(3kHz, OdB) output levels. If these levels do not match, turn
the adjustment screw where both of output
levels match together within 2 dB.
PHONES
Specification:
Speed checker
Frequency difference between the beginning
and the end of the tape should be within +2 %
(460 Hz).
Digital frequency counter
2940 — 3030Hz
R-CH
peak
Screw
position
Adjustment Location:
3. Phase Check
Mode: playback
test tape
P-4-A063
(6.3 kHz, -100B)
adjustment resistor
Adjustment Location:
adjustment screw
in phase 135°
45° 90°
C se =)
good wrong
Note: Finish the screw adjustment with a turn in the
clockwise direction. After the adjustment, lock
the adjustment screw with suitable locking
compound.