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Tape Speed Adjustment DECK A
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
HIGH SPEED DUBBING button.
Procedure:
1. Turn the power switch on.
2. Press the FUNCTION button, ENTER button and
PROGRAM button simultaneously.
To exit from the test mode, press the POWER button.
Mode: Playback (FWD)
1. Insert the WS-48B into the deck A and the blank tape into the
test tape
WS-48B
(3 kHz, 0 dB)
set
main board
CN207 (Pin 1 : L-CH)
deck B.
2. Press the REC button and ( button on the deck B. Then
the deck B is at recording mode.
3. Set the deck A to playback mode.
4. Keep pressing the HIGH SPEED DUBBING button in play-
back mode.
Then at HIGH speed mode.
5. Adjust RV652 on the AUDIO board do that frequency counter
reads 6,000 ± 90 Hz.
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L 13942296513
6. Take off the HIGH SPEED DUBBING button.
Then at NORMAL speed mode.
7. Adjust RV651 on the AUDIO board so that frequency counter
reads 3,000 ± 90 Hz.
8. Frequency difference between deck A and deck B the begin-
ning of the tape should be within ± 1.5 %.
Adjustment Location: AUDIO board
Sample Volue of Wow and Flutter:
Playback level Adjustment DECK A
Procedure:
Mode: Playback (FWD)
test tape
P-4-L300
(315 Hz, 0 dB)
set
main board
CN207 (Pin 1 : L-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:
CN207 PB level: 301.5 to 338.3 mV (–8.2 to –7.2 dB) level
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difference between the channels: within ±0.5 dB
Adjustment Location: AUDIO and MAIN boards
.

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frequency counter
+
–
(Pin 3 :R-CH)
0.3% or less W.RMS
(WS-48B)
DECK B
level meter
+
–
(Pin 3 : R-CH)
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8
Record bias Current Adjustment
Procedure:
1. Mode: record
Pin 6 (L-CH) of IC1501 on the main board.
Pin #¶ (L-CH) of IC1501 on the main board.
1) 315 Hz
2) 10 kHz
AF OSC
attenuator
Pin 2 (GND) of ICN207 on the main board.
2. Mode: Playback
recorded
portion
set
Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV341 (L-CH)
and RV441 (R-CH) on the AUDIO board to repeat steps 1 and 2.
Adjustable limits: Playback output of 315 Hz to playback output
of 10kHz: ±0.5 dB
Adjustment Location: AUDIO and MAIN boards
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3 6 7 1 3
Record Level Adjustment DECK B
Procedure:
1. Mode: record
Pin 6 (L-CH) of IC1501 on the main board.
Pin #¶ (R-CH) of IC1501 on the main board.
315 Hz, 50 mV (–23.8 dB)
AF OSC
attenuator
Pin 2 (GND) of CN207 on the main board.
2. Mode: Playback
recorded
portion
set
Confirm playback the signal recorded in step 1 become adjustable
limits as follows.
If these levels do not adjustable limits, adjustment the RV1501 (L-
CH) and RV1551 (R-CH) on the main board to repeat steps 1 and 2.
Adjustable limits:
CN207 PB level: 47.3 to 53.1 mV (–24.3 to –23.3 dB)
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Adjustment Location: MAIN board
.
– 40 –
2 9 9 4 2 8
DECK B


50 mV (–23.8 dB)

blank tape
600 Ω CN-123
set
level meter
+
–
CN207 (Pin 1 : L-CH)
(Pin 3 : R-CH)
1 5 0 5 8 2 9 9 4
blank tape
600 Ω
CS-123
set
level meter
+
–
CN207 (Pin 1 : L-CH)
(Pin 3 : R-CH)
m
co
9 9
2 8 9 9