SONY HST-471
Instrukcja Serwisowa

SECTION 2 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. 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 Forward Forward Back Tension Reverse Reverse Back Tension FF, REW Torque Meter CQ-102C CQ-102C CQ-102RC CQ-102RC CQ-201B Meter Reading 36 to 61g�cm (0.50 � 0.84 oz�inch) 2 to 6g�cm (0.026 � 0.082 oz�inch) 36 to 61g�cm (0.50 � 0.84 oz�inch) 2 to 6g�cm (0.026 � 0.082 oz�inch) 61 to 143g�cm (0.85 � 1.98 oz�inch)

SECTION 3 ELECTRICAL ADJUSTMENTS
DECK SECTION 1. 0 dB=0.775V

2. 3. 4. 5.

6. 7. 8.

Demagnetize the record/playback head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.) Do not use a magnetized screwdriver for the adjustments. After the adjustments, apply suitable locking compound to the parts adjust. The adjustments should be performed with the rated power supply voltage unless otherwise noted. 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.) The adjustments should be performed for both L-CH and Rch. Switches and controls should be set as follows unless otherwise specified. Set to test mode. (Press key switch same time SPECTRUM ANALYZER ENTER/NEXT and EFFECT ON/OFF button.) Test Tape Tape P-4-A100 WS-48B P-4-L300 Signal 10 kHz, �10 dB 3 kHz, 0dB 315 Hz, 0dB Used for Azimuth Adjustment Tape Speed Adjustment Level Adjustment

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� Tape Tension Measurement Mode Forward Reverse Tension Meter Meter Reading CQ-403A more than 100 g (3.53 oz) CQ-403R more than 100 g (3.53 oz) Record/Playback Head Azimuth Adjustment DECK A DECK B

Note : Perform this adjustments for both decks. Remove the covers of cassette holders. Procedure: 1. Mode: Playback (FWD)
test tape P-4-A100 (10 kHz, �10 dB)

rear panel set

level meter + �

VIDEO1 AUDIO OUT connector (L: L-CH) (R: R-CH)

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