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HCD-VX777
2. Turn the adjustment screw and check output peaks. If the peaks do not match for L-CH and R-CH, turn the adjustment screw so that outputs match within 1dB of peak.
Tape Speed Adjustment
DECK B
Note: Start the Tape Speed adjustment as below after setting to the test mode. In the test mode, the tape speed is high during pressing the CD SYNC HI-DUB button.
L-CH peak Output level
within 1dB within 1dB
Procedure: 1. Turn the power switch on. 2. Press the x button, ENTER button and DISC 3 button simultaneously. (The �TEST MODE� on the fluorescent indicator tube display while in the test mode.) To exit from the test mode, press the ?/1 button. Mode: Playback
Screw position
R-CH peak L-CH peak R-CH peak
Screw position
test tape WS-48B (3 kHz, 0 dB) set main board CN301 (Pin 3 (Pin 1
frequency counter
3. Mode: Playback
test tape P-4-A100 (10 kHz, �10 dB) L-CH MAIN board CN301 set R-CH pin 1 waveform of oscilloscope pin 3 L R pin 2 V H
+ � : L-CH) : R-CH)
oscilloscope
1. Insert the WS-48B into the deck B. 2. Press the gG button on the deck B. 3. Press the CD SYNC HI-DUB button in playback mode. Then at HIGH speed mode. 4. Adjust RV1001 on the LEAF SW board do that frequency counter reads 6,000 ± 30 Hz. 5. Press the CD SYNC HI-DUB button. Then back to NORMAL speed mode. 6. Adjust RV1002 on the LEAF SW board so that frequency counter reads 3,000 ± 15 Hz. Adjustment Location: LEAF SW board Playback level Adjustment DECK A Procedure: Mode: Playback
test tape P-4-L300J (315 Hz, 0 dB) set
in phase 45 ° good
90 ° 135 ° 180 ° wrong
DECK B
4. After the adjustments, apply suitable locking compound to the pats adjusted. Adjustment Location: Playback Head (Deck A). Record/Playback/Erase Head (Deck B).
level meter
+ �
main board CN301 (Pin 3 : L-CH)
Deck A is RV302 (L-CH), Deck B is RV303 (L-CH) so that adjustment within adjustment level as follows. Adjustment Level: CN301 PB level: 334.4 to 748.7 mV (�7.3 to �0.3 dB) level difference between the channels: within ±0.5 dB Adjustment Location: MAIN board Sample Volue of Wow and Flutter: 0.3% or less W. RMS (WS-48B)
forward reverse
15
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