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SECTION 4 ADJUSTMENTS
4-1. MECHANICAL ADJUSTMENTS
PRECAUTION 1. Clean the following parts with a denatured-alcohol-moistened swab : record/playback head pinch roller erase head rubber belts capstan 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 Torque Forward Forward Back Tension Fast Forward Rewind Torque Meter CQ-102C CQ-102C CQ-201B CQ-201B Meter Reading 30 � 70 g�cm (0.42 � 0.97 oz�inch) 1.5 � 5.5 g�cm (0.020 � 0.076 oz�inch) more than 60 g�cm (more than 0.84 oz�inch) more than 60 g�cm (more than 0.84 oz�inch)
4-2. ELECTRICAL ADJUSTMENTS TAPE RECORDER SECTION
Standard Output Level Output terminal load impedance output signal level Test Tape Type WS-48A Signal 3kHz, 0dB Used for Tape Speed Adjustment HP OUT 32� 0.25V (�10dB)
0dB = 0.775V Tape Speed Adjustment Procedure : Mode : Playback
test tape WS-48A (3kHz, 0dB) digital frequency counter 32�
set J301 (phones)
Tape Tension Measurement Torque Meter CQ-403A Meter Reading more than 100g (more than 3.53 oz)
1. Adjust the screw (Tape Speed Adjustment control inside motor) for 2,970 � 3,030 Hz reading on the digital frequency counter. 2. Frequency difference between the beginning and the end of the tape should be within 1.5% (45Hz). Adjustment Location :
