SONY CFSB15
Service Manual

SECTION 3 MECHANICAL ADJUSTMENTS
1. PRECAUTION Clean the following parts with a denatured-alcohol moistened swab : record/playback head pinch roller erase head rubber belts capstan idlers Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.) Do not use a magnetizer screwdriver for the adjustments. After the adjustments, apply suitable locking compound to the parts adjusted. The adjustment should be perfomed with the reted power supply voltage unless otherwise noted. Power supply voltage: 6V dc.

SECTION 4 ELECTRICAL ADJUSTMENTS
4-1 TAPE RECODER SECTION

Standard Output Level output terminal load impedance output signal level HP OUT 32� 0.25V (�10dB) SP OUT 12� 0dB

2.

3. 4. 5. 6.

Test Tape Type WS-48A P-4-A063J Signal 3kHz, 0dB 6.3kHz, �10dB Used for tape speed adjustment head azimuth adjustment

Torque Measurement Torque Forward Forward back tension Fast Forward Rewind Torque meter CQ-102C CQ-102C CQ-201B CQ-201B Meter reading 30-70g�cm (0.42-0.97 oz�inch) 1.5-5.5g�cm (0.020-0.076 oz�inch) more than 60g�cm (more than 0.83 oz�inch) more than 60g�cm (more than 0.83 oz�inch)

Tape Speed Adjustment Procedure : Mode : playback

Tape Tension Measurement Torque meter CQ-403A Meter reading more than 100g (more than 3.53 oz)

Adjustment Value : Speed checker �1% to +1% Digital frequency counter 2,970�3,030Hz

Frequency difference between the beginning and the end of the tape should be within 1.5% (45Hz). Adjustment Location :

tape speed adjustment control inside motor

�5�