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SANYO DCDA370
Service Manual


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

Description of SANYO DCDA370 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 4 (click to view)
CD PLAYER ADJUSTMENTS
(2) Checking the "eye" pattern 1. Switch "ON" the POWER. 2. Connect an oscilloscope to TP1 (RF) and TP4 (VC). 3. Load the test disc. 4. Press the PLAY button. 5. Check to be sure that the "eye" pattern is at the center of waveform and that the diamond shape is clearly defined. 6. Press the STOP button. 7. Turn off the POWER switch.
a

TP1 (RF) TP4 (VC)

+ OSCILLOSCOPE

OPENING EXPANDED

b

TAPE ADJUSTMENTS
1. Azimuth Adjustment
� Be sure to clean the heads before attempting to make any adjustment. � Be sure both channels (1 and 2) are the same level. (Using a dual-channel oscilloscope) � Be sure both channel's waveform are same for the phase matching. � After completion of the adjustment, use the threadlock (TB-1401B) to secure the azimuth adjustment screws. 1. Remove the cover deck as Fig.1. 2. Load a test tape (VTT-738 etc. : 10kHz) in the Deck. 3. Press the PLAY button. (Normal playback) 4. Use a + tip screwdriver to turn the screw for normal azimuth adjustment so that the left and right outputs are maximized at the same phase during normal playback. See Fig.2. 5. Press the PLAY button. (Reverse playback) 6. Use a + tip screwdriver to turn the screw for reverse azimuth adjustment so that the left and right outputs are maximized at the same phase during reverse playback. 7. Adjust so that the waveforms for the left and right channels are in alignment.
NORMAL REVERSE

Fig.1

Fig.2

2. Tape Speed Adjustment
� Connect the Frequency Counter to TAPE OUT. 1. Insert the test tape (MTT-111N, etc.; 3,000Hz) into the DECK.

Fig.3 hole for adjustment

MOTOR

2. Press the PLAY button. . 3. Adjust a hole on the motor bottom so that a frequency counter reading of 3,000 ±5Hz is obtained.See Fig.3. 4. Press the STOP button, and eject the test tape.

3. Torque Measurement
Item Take-up Torque PLAY : TW2111A (FWD) PLAY : TW2121A (REV) F.FWD / REW : TW2231 PLAY/REV. F.FWD REW 30 ~ 65 grcm 30 ~ 65 grcm 70 ~ 140 grcm -3Back tention PLAY : TW2111A (FWD) PLAY : TW2121A (REV) 2 ~ 6 grcm Pulley tention Driving power cassette : TW-2412 (PLAY) TW-2422(REV. PLAY) �50grcm 70 ~140 grcm

Test Cassette

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