2. Turn the adjustment screw and check output peaks. If the peaksTape Speed AdjustmentDECK B
do not match for L-CH and R-CH, turn the adjustment screNote:Start the wTape Speed adjustment as below after setting to the test
so that outputs match within 1dB of peak.mode.
In the test mode, the tape speed is high during pressing the
CD SYNC HI-DUB button.
Procedure:
within1. Turn the power switch on.
L-CH1dB2. Press thex button, ENTER button and DISC 3 button
peak
withinsimultaneously.
1dB(The TEST MODE on the fluorescent indicator tube displayOutput
level
while in the test mode.)
To exit from the test mode?/,1 press thebutton.
R-CHMode: Playback
peak
ScrewScrewtest tape
positionL-CHR-CHpositionWS-48B
frequency counter
peakpeak(3 kHz, 0 dB)
+
3. Mode: Playbackset
�
test tape
MAIN board
P-4-A100
CN301 (Pin 3 : L-CH)
(10 kHz, �10 dB)oscilloscope
pin 3(Pin 1 : R-CH)
L-CH
pin 2
MAIN1. Insert the WS-48B into the deck B.
L
boardVH
2. Press thegG button on the deck B.
CN301
R
set3. Press the CD SYNC HI-DUB button in playback mode.
Then at HIGH speed mode.
R-CH
4. Adjust RV1001 on the LEAF SW board do that frequency
pin 1
counter reads 6,000 30 Hz.
5. Press the CD SYNC HI-DUB button.
waveform of oscilloscope
Then back to NORMAL speed mode.
6. Adjust RV1002 on the LEAF SW board so that frequency
counter reads 3,000 15 Hz.
in phase 45° 90° 135° 180°
Adjustment Location: LEAF SW board
goodwrong
Playback level AdjustmentDECK A DECK B
4. After the adjustments, apply suitable locking compound to theProcedure:
pats adjusted.Mode: Playback
test tape
Adjustment Location:Playback Head (Deck A).P-4-L300
level meter
Record/Playback/Erase Head (Deck B).(315 Hz, 0 dB)
+
set
�
MAIN board
CN301 (Pin 3 : L-CH)
(Pin 1 : R-CH)
Deck A is RV302 (L-CH) and RV352 (R-CH), Deck B is RV303
(L-CH) and RV353 (R-CH) so that adjustment within adjustment
level as follows.
Adjustment Level:
CN301 PB level: 301.5 to 338.3 mV (8.2 to 7.2 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
17 |
ACEC
SONY
