SONY HCDED1A
Instrukcja Serwisowa

SECTION 3 MECHANICAL ADJUSTMENTS
PRECAUTION 1. Clean the following parts with a denatured alcohol-moistened swab : record/playback heads pinch rollers erase head rubber belts capstan idlers 2. Demagnetize the record/playback head with a head demagnetizer. 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 FWD FWD back tension REV REV back tension Torque meter CQ-102C Meter reading 28 to 71g � cm (0.39 � 0.99 oz � inch) 1 to 7g � cm (0.01 � 0.10 oz � inch) 28 to 71g � cm (0.39 � 0.99 oz � inch) 1 to 7g � cm (0.01 � 0.10 oz � inch) 56 to 122g � cm (0.78 � 1.69 oz � inch) 100g or more (3.53 oz or more) 100g or more (3.53 oz or more)

SECTION 4 ELECTRICAL ADJUSTMENTS
DECK SECTION 0 dB=0.775V
1. Demagnetize the record/playback head with a head damagnetizer. (Do not bring the head demagnetizer close to the erase head.) 2. Do not use a magnetized screwdriver for the adjustments. 3. After the adjustments, apply suitable locking compound to the parts adjusted. 4. The adjustments should be performed with the rated power supply voltage unless otherwise noted. 5. The adjustments should be performed in the order given in this service manual. (As a general rule, playback circuit adjustment should be completed before performing recording circuit adjustment.) 6. The adjustments should be performed for both L-CH and R-ch. 7. Switches and controls should be set as follows unless otherwise specified.
Tape P-4-A100 WS-48B Signal 10 kHz, �10 dB 3 kHz, 0 dB 315 Hz, 0 dB Used for Azimuth Adjustment Tape Speed Adjustment Level Adjustment

CQ-102C CQ-102RC

P-4-L300

Record/Playback Head Azimuth Adjustment Procedure : 1. Mode : Playback
test tape P-4-A100 (10kHz, �10dB) MD OUT (JK301) level meter

CQ-102RC

FF/REW FWD tension

CQ-201B CQ-403A

REV tension

CQ-403R

set

+ �

�8�