Read Sony HCD-GRX3 / HCD-R300 / HCD-RX55 / MHC-GRX3 / MHC-R300 / MHC-RX55 Service Manual online
— 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.
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.
parts adjusted.
Adjustment Location:
Adjustment screws
REC/PB head (deck A)
or PB head (deck B)
REC/PB head (deck A)
or PB head (deck B)
test tape
WS-48B
(3kHz, 0dB)
WS-48B
(3kHz, 0dB)
Tape Speed Adjustment (Deck A)
Procedure:
1.
1.
Mode: Playback
2.
Adjust the SFR501 so that the frequency counter reads 3,000
Hz ± 90Hz.
Hz ± 90Hz.
Adjustment Location: DECK board
Sample Value of Wow and flutter
W. RMS (JIS) within 0.3%
(test tape: WS-48B)
(test tape: WS-48B)
[DECK BOARD] — Component side —
L-CH
peak
peak
R-CH
peak
peak
screw
position
position
output
level
level
within
2dB
2dB
within 2dB
L-CH
peak
peak
screw
position
position
R-CH
peak
peak
test tape
P-4-A100
(10kHz, –10dB)
P-4-A100
(10kHz, –10dB)
SPEAKER
terminal (JK301)
(L-CH)
terminal (JK301)
(L-CH)
set
L
R
oscilloscope
SPEAKER
terminal (JK301)
(R-CH)
terminal (JK301)
(R-CH)
Waveform of oscilloscope
in phase
45˚
90˚
135˚
180˚
good
wrong
SPEAKER
terminal (JK301)
terminal (JK301)
set
frequency counter
+
–
–
Tape Speed
SFR501
CN501
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