Sanyo DC-X8CT - Tape Deck Service; Tape Adjustments and Measurements

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TAPE DECK SECTION
TAPE ADJUSTMENTS
• 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.
2. Load a test tape (MTT-114N etc. : 10kHz) in the Deck.
3. Press the PLAY (Normal playback) button.
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.1.
5. Press the PLAY (Reverse playback) button.
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.
1. Azimuth Adjustment
3. Torque Measurement
2. Tape Speed Adjustment
Test Cassette
Take-up Torque
Back tention
Driving power cassette :
TW-2412 (PLAY)
TW-2422(REV. PLAY)
PLAY/REV.
F.FWD
REW
1 ~ 6 grcm
-
-
70 ~ 150 grcm
Pulley tentionItem
PLAY : TW2111A (FWD)
PLAY : TW2121A (REV)
F.FWD / REW : TW2231
PLAY : TW2111A (FWD)
PLAY : TW2121A (REV)
30 ~ 70 grcm
70 ~ 150 grcm
• Connect the Frequency Counter to TAPE OUT.
1. Insert the test tape (MTT-111N, etc.; 3,000Hz) into the DECK.
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.2.
4. Press the STOP button, and eject the test tape.
Fig.1
>80grcm
hole for adjustment
MOTOR
Fig.2
FORWARD
REVERSE
>80grcm