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Tape Speed Adjustment
Setting:
[VOL] control: mechanical mid
[VOR] switch: OFF
Procedure:
Note: Reform 1.2 cm/s speed adjustment before 2.4 cm/s speed.
test tape
WS-24: tape speed 2.4cm/s
WS-12: tape speed 1.2cm/s
(3 kHz, –10 dB)
set
Adjustment mode: Playback
1. Tape Speed: 2.4 cm/s
Playback WS-24 (tape center part) and adjust RV601 so that
reading on the frequency counter becomes 3,000 Hz.
2. Tape Speed: 1.2 cm/s
Playback WS-12 (tape center part) and adjust RV602 so that
reading on the frequency counter becomes 3,000 Hz.
Specified Value:
Tape Speed
2.4 cm/s
1.2 cm/s
3.
Check frequency difference between the beginning and the
end of the tape should be within ±0.5%.
2.4 cm/s: 15 Hz
1.2 cm/s: 15 Hz
frequency counter
16 Ω
+
–
[EAR]
jack (J101)
Frequency counter
2,880 to 3,120 Hz
2,850 to 3,150 Hz
Adjustment Location:
First remove the plate, blind.
M-640V/645V/647V
Remove the
plate, blind.
RV601
2.4 cm/s
RV602
1.2 cm/s
tape speed adjustable resistors
9
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