Sony HCD-G2500, Руководство по обслуживанию, Страница: 15 / 55

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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 9)
test tape
WS-48B
(3kHz, 0dB)
Tape Speed Adjustment (Deck A)
Procedure:
1.
Mode: Playback
2. Adjust the SFR809 so that the frequency counter reads 3,000
Hz ± 90Hz.
Adjustment Location: MAIN board (See page 14)
Sample Value of Wow and flutter
W. RMS (JIS) within 0.3%
(test tape: WS-48B)
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 (JK703)
(L-CH)
set
L
R
SPEAKER
terminal (JK703)
(R-CH)
Waveform of oscilloscope
in phase 45˚ 90˚ 135˚ 180˚
good wrong
SPEAKER
terminal (JK703)
set
frequency counter
+
–
Adjustment screws
REC/PB head (deck A)
or PB head (deck B)
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