SONY M730V
Service Manual

SECTION 3 MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened swab : record/playback/erase head pinch roller rubber belts capstan 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. The adjustments should be performed with the rated power supply voltage unless otherwise noted. Power supply voltage : 3 Vdc TAPE SPEED switch : 2.4cm Torque Measurement Mode Forward Torque Meter CQ-102M Meter Reading 5 to 10 g � cm (0.07 to 0.140 oz � inch) 5 to 10 g � cm (0.07 to 0.140 oz � inch) more than 30 g � cm Fast Forward Rewind CQ-201M CQ-201M (more than 0.42 oz � inch) more than 30 g � cm (more than 0.42 oz � inch)

SECTION 4 ELECTRICAL ADJUSTMENTS
Test Tape Type Signal Used for Tape Speed (cm/s) 2.4 1.2/2.4

S-2-A030A 3 kHz, � 20 dB Head Azimuth Adjustment WS-24 3 kHz, � 10 dB Tape Speed Adjustment

Record/Playback/Erase Head Azimuth Adjustment
Setting: VOL control : mechanical mid TAPE SPEED switch : 2.4cm/s VOR switch : OFF FAST PB switch : OFF Procedure: 1. Mode : Playback
test tape S-2-A030A (3 kHz, �20 dB) 16 � set EAR jack (J101)

Reverse

CQ-102MR

level meter

Tape Tension Measurement Mode Forward Reverse Tension Meter CQ-403M CQ-403MR Meter Reading more than 25 g (more than 0.35 oz) more than 25 g (more than 0.35 oz)

2. Turn the adjustment screw to obtain the maximum reading on level meter. Note: Several peaks may appear, but the maximum. Adjustment Location : First remove the cover (AZ).

Remove the cover (AZ)

(REV)

Head azimuth adjustment screw (FWD)

�8�