SONY TCTX373
Service Manual

SECTION 4 MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened swab : record/playback/erase head pinch roller rubber belts capstan idlers 2. Demagnetize the record/playback/erase 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 FWD CQ-102C FWD Back tension REV CQ-102RC REV Back tension FF, REW CQ-201B Torque Meter Meter Reading 35 � 80 g � cm (0.49 � 1.11 oz � inch) 1 � 7 g � cm (0.012 � 0.097 oz � inch) 35 � 80 g � cm (0.49 � 1.11 oz � inch) 1 � 7 g � cm (0.012 � 0.097 oz � inch) more than 40 g � cm (more than 0.56 oz � inch)

SECTION 5 ELECTRICAL ADJUSTMENTS
PRECAUTION
1. The adjustment should be performed in the publication. (Be sure to male playback adjustment at first.) 2. The adjustments and measurement should be performed for both L-CH and R-CH. � Switch position DOLBY NR switch : OFF DIRECTION switch : A Standard Input Level Input terminal source impedance input signal level Standard Output Level Output terminal load impedance output signal level Test Tape Type WS-48A P-4-L300 Signal 3 kHz, 0 dB 315 Hz, 0 dB Used for Tape Speed Adjustment PB Level Adjustment TAPE OUT 47 k� 0.49 V (� 4 dB) TAPE IN 10 k� 0.49 V (� 4 dB)

0 dB = 0.775 V

� 13 �