SECTION 3 MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured alcohol-moistened swab : record/playback head capstan idlers playback head pinch roller erase head rubber belts 2. Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.) 3. Do not use a magnetized screwdriver for the adjustments. 4. After the adjustments, apply suitable locking compound to the parts adjusted. 5. The adjustments should be performed with the rated power supply voltage unless otherwise noted. Torque Measurement DECK A Mode Forward Torque meter CQ-102C DECK B Meter reading 2.21� 5.39 mN � m (22.5 to 55 g � cm) (0.31 to 0.76 oz � inch) 0.20 � 0.49 mN � m (2 to 5 g � cm) (0.03 to 0.07 oz � inch) 5.88 � 11.77 mN � m (60 to 120 g � cm) (0.83 to 1.67 oz � inch)
SECTION 4 ELECTRICAL ADJUSTMENTS
TAPE SECTION 0 dB = 0.775 V
PHONES OUT 32 � 0.25 V (�10 dB)
Standard Output Level Output terminal SP OUT load impedance output signal level Test Tape Tape WS-48B P-4-A063 6� 0.775 V (0 dB)
Signal 3 kHz, 0 dB 6.3 kHz, �10 dB
Used for tape speed adjustment head azimuth adjustment DECK B
REC/PB Head Azimuth Adjustment DECK A Procedure: 1. Mode: playback
test tape P-4-A063 (6.3 kHz, �10 dB) 32 � set J901 (phones)
level meter
Forward back tension Fast Forward and Rewind
CQ-102C
CQ-201B
2. Turn the adjustment screw for the maximum output levels. If these levels do not match. Turn the adjustment screw until both of output levels match together within 1 dB.
Tape Tension Measurement DECK A Mode Forward Tension meter CQ-403A
