— 10 —
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 2 dB of peak.
3.
Mode: Playback
4.
After the adjustments, apply suitable locking compound to the
parts adjusted.
Adjustment Location:
Remove the cassette lid before adjustment (See page 8)
test tape
WS-48B
(3kHz, 0dB)
Tape Speed Adjustment (Deck A)
Procedure:
1.
Mode: Playback
2.
Adjust the SFR201 so that the frequency counter reads 3,000
Hz ± 90Hz.
Adjustment Location: MAIN board
Sample Value of Wow and flutter
W. RMS (JIS) within 0.3%
(test tape: WS-48B)
[MAIN BOARD] — Component side —
CN204
L-CH
peak
R-CH
peak
screw
position
output
level
within
2dB
within 2dB
L-CH
peak
screw
position
R-CH
peak
test tape
P-4-A100
(10kHz, –10dB)
SPEAKER
terminal (JK501)
(L-CH)
set
L
R
oscilloscope
SPEAKER
terminal (JK501)
(R-CH)
Waveform of oscilloscope
in phase
45˚
90˚
135˚
180˚
good
wrong
SPEAKER
terminal (JK501)
set
frequency counter
+
–
SFR201
Tape Speed
Adjustment screws
REC/PB head (deck A)
or PB head (deck B)
