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SECTION 3 MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured alcohol-moistened swab : record/playback head pinch roller erase head rubber belts capstan idlers 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 Mode Forward Forward back tension Fast Forward Rewind CQ-201B Torque meter CQ-102C CQ-102C CQ-201B Meter reading 25 � 60 g � cm (0.35 � 0.83 oz � inch) 1 � 5 g � cm (0.014 � 0.069 oz � inch) 55 � 140 g � cm (0.76 � 1.94 oz � inch)
SECTION 4 ELECTRICAL ADJUSTMENTS
4-1. TAPE RECORDER SECTION
Standard Output Level Output terminal load impedance output signal level Test Tape Type WS-48A P-4-A063 Signal 3 kHz, 0 dB 6.3 kHz, �10 dB Used for tape speed adjustment head azimuth adjustment HP OUT 32 � 0.25 V (�10 dB)
0 dB = 0.775 V
Tape Speed Adjustment Procedure: Mode: playback
digital frequency counter
test tape WS-48A (3 kHz, 0 dB) 32 � set
0000
55 � 140 g � cm (0.76 � 1.94 oz � inch)
2 jack (J301)
Tape Tension Measurement Mode Forward Tension meter CQ-403A Meter reading more than 170 g (more than 6.00 oz) Adjust so that the value on the digital frequency counter is 3,000 Hz. Specification Value: Digital frequency counter 2,970 � 3,030 Hz Adjust so that the frequency at the beginning and that at the end of tape winding are between 2,955 to 3,045 Hz. Adjustment Location:
tape speed adjustment control inside motor
�8�
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