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SONY HCDVR90AV
Service Manual


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

Description of SONY HCDVR90AV 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 16 (click to view)
3.

Mode: Playback
test tape P-4-A100 (10kHz, â10dB) oscilloscope MD OUT

Tape Speed Adjustment (Deck A) Note: Set the test mode using the following method and begin tape speed adjustment. In the test mode, the speed will switch to double speed or normal speed each time the HI-SPEED DUB button is pressed. Procedure: With the power turned ON, press the t/CLOCK SET button, ENTER button, and DISC 3 button simultaneously. (The âVOLUMEâ on the fluorescent display tube will blink while in the test mode.) To exit the test mode, press the 1/u button.
Waveform of oscilloscope

set

1. 2. 3. 4. 5. 6.

Insert the WS-48B into deck B. Press the · button of deck B. Press the HI-SPEED DUB button and play the tape at double speed. Adjust RV1001 of the LEAF SW board so that the reading of the frequency counter becomes 6000 ± 180 Hz. Press the HI-SPEED DUB button and play the tape at normal speed. Adjust RV1002 of the LEAF SW board so that the reading of the frequency counter becomes 3000 ± 90 Hz.

in phase

45° good

90°

135°

180° wrong

4.

After the adjustments, apply suitable locking compound to the parts adjusted.

Adjustment Location: LEAF SW board Adjustment Location: Playback Head (Deck A) Record/Playback/Erase Head (Deck B) Sample Value of Wow and flutter W.RMS (JIS) less than 0.3% (test tape: WS-48B) Playback Level Adjustment (Deck A, Deck B) Procedure: Mode: Playback
test tape P-4-L300 (315Hz, 0dB) set level meter

Remove the cassette lid.

Reverse

Foward
MD OUT

Deck A is RV311 (L-CH) and RV411 (R-CH), deck B is RV301 (L-CH) and RV401 (R-CH) so that adjustment within the following adjustment level. Adjustment level: CN301 playback level: 301.5 to 338.3 mV (â8.2 to â7.2 dB) level difference between the channels: within ± 0.5 dB Adjustment Location: AUDIO board

Adjustment Location [LEAF SW BOARD] (Conductor Side)
RV1001(High Speed) RV1002(Normal Speed)

RV1001

RV1002

16

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