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SONY WMFS420
Service Manual


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

Description of SONY WMFS420 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 7 (click to view)
SECTION 4 MECHANICAL ADJUSTMENT
1. PRECAUTION Clean the following parts with a denatured-alcohol-moistened swab: playback head pinch roller rubber belts capstan Do not use a magnetized screwdriver for the adjustments.

SECTION 5 ELECTRICAL ADJUSTMENT
TAPE SECTION
Test Tape Tape WS-48A Signal 3 kHz, 0 dB Used for Tape speed adjustment 0 dB = 0.775 V

2.

Torque Measurement Mode Torque Meter FWD FWD Back Tension FF, REW CQ-102C CQ-102C CQ-201B

Meter Reading 20 to 42 g•cm (0.27 to 0.58 oz•inch) More than 2.0 g•cm (More than 0.027 oz•inch) More than 50 g•cm (More than 0.69 oz•inch)

Tape Speed Adjustment Procedure: Mode: Playback
Test tape WS-48A (3 kHz, 0 dB) 16 Ω + – digital frequency counter

Set

J301 (phones)

Adjustment Value: normal tape speed Adjust the tape speed adjustment RV601, so that the freqency counter reading becomes 3,000Hz. Specification Value: Digital frequency counter 2,970 to 3,030 Hz Frequency difference between the beginning and the end of the tape should be within 1.5 % (45 Hz). Adjustment Location:

RV601

—7—

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