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SONY HCD-VX77J
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SONY HCD-VX77J Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 17 (click to view)
SECTION 5 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
Mode Torque meter Meter reading

SECTION 6 ELECTRICAL ADJUSTMENTS
DECK SECTION
0 dB=0.775 V

1. Demagnetize the record/playback head with a head demagnetizer. 2. Do not use a magnetized screwdriver for the adjustments. 3. After the adjustments, apply suitable locking compound to the parts adjust. 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 RCH.

FWD

CQ-102C

FWD back tension REV

CQ-102C

3.06 N � m to 6.96 N � m 31 to 71 g � cm (0.43 � 0.98 oz � inch) 0.19 N � m to 0.58 N � m 2 to 6 g � cm (0.02 � 0.08 oz � inch) 3.06 N � m to 6.96 N � m 31 to 71 g � cm (0.43 � 0.98 oz � inch) 0.19 N � m to 0.58 N � m 2 to 6 g � cm (0.02 � 0.08 oz � inch) 6.96 N � m to 14.02 N � m 71 to 143 g � cm (0.98 � 1.99 oz � inch) 9.80 N � m 100 g or more (3.53 oz or more) 9.80 N � m 100 g or more (3.53 oz or more)

7. Switches and controls should be set as follows unless otherwise specified. � Test Tape Tape P-4-A100 WS-48B P-4-L300 Signal 10 kHz, �10 dB 3 kHz, 0 dB 315 Hz, 0 dB Used for Azimuth Adjustment Tape Speed Adjustment Level Adjustment

CQ-102RC

Record/Playback Head Azimuth Adjustment

REV back tension FF/REW

CQ-102RC

DECK A

DECK B

Note: Perform this adjustments for both decks

CQ-201B

Procedure: 1. Mode: Playback
test tape P-4-A100 (10 kHz, �10 dB) main board CN301 Pin 3 (L-CH) Pin 1 (R-CH) level meter set main board CN301 Pin 2 (GND) + �

FWD tension

CQ-403A

REV tension

CQ-403R

17

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