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 screwNote:Start the Tape 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
[HI-DUB] button.
Procedure:
1. Turn the power switch on.
within
L-CH1dB2. Press thep button, [ENTER/NEXT] button and [DISCE3] button
peaksimultaneously.
within
Output1dB(The OVOLUME� on the fluorescent indicator tube will blink
levelwhile in the test mode.)
To exit from the test mode,I/u press thebutton.
Mode: Playback
R-CH
peak
ScrewScrewtest tape
positionL-CHR-CHpositionWS-48B frequency counter
(3 kHz, 0 dB)
peakpeak
+
3. Mode: Playbackset
�
test tapemain 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 theá button on the deck B.
CN301
R
set3. Press the [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 ? 180 Hz.
5. Press the [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 ? 90 Hz.
in phase45° 90° 135° 180°
Adjustment Location: LEAF SW board
goodwrong
Playback level AdjustmentDECK A DECK B
Procedure:
4. After the adjustments, apply suitable locking compound to
Mode: Playback
the pats adjusted.
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 RV311 (L-CH) and RV411 (R-CH), Deck B is RV301
(L-CH) and RV401 (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: AUDIO board
forward
reverse
� 14 � |
ACEC
