SONY PMC-R30L
Diagrama del circuito

SECTION 4 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 magnetizer 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 FWD Back Tension FF REW Torque meter CQ-102C CQ-102C Meter reading 30 � 70 g � cm (0.42 � 0.97 oz � inch) 1.5 � 5.5 g � cm (0.021 � 0.076 oz � inch) more than 60 g � cm (more than 0.83 oz � inch) more than 60 g � cm (more than 0.83 oz � inch)

SECTION 5 ELECTRICAL ADJUSTMENTS
TAPE SECTION 0 dB = 0.775 V

� Standard Output Level Output terminal load impedance output signal level � Test Tape Type WS-48A Signal 3 kHz, 0 dB Used for tape speed adjustment HP OUT 32 � 0.25 V (�10 dB)

Tape Speed Adjustment Procedure: Mode: playback
test tape WS-48A (3 kHz, 0 dB) 32 � set digital frequency counter

CQ-201B CQ-201B

phones jack (J302)

Tape Tension Measurement Mode FWD Tension meter CQ-403A Meter Reading more than 100 g (more than 3.53 oz)

Adjust so that the value on the digital frequency counter is 3,000 Hz. Specification Value: Digital frequency counter 2,985 to 3,015 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

� 12 �