Sony CFD-910, Руководство по обслуживанию

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CFD-910
Note:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in
Ω
and 1 /
4
W or less unless otherwise
specified.
Note: The components identified by mark ! or dotted
line with mark ! are critical for safety.
Replace only with part number specified.
• U : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 9V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : FM (Radio section), CD STOP (CD section)
PLAY (Tape section)
( ) : AM (Radio section), REC (Tape section)
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
J : CD
r Waveforms
r
SCHEMATIC DIAGRAM (CD SECTION)
1
IC701
#¡
(RFO)
1.0 – 1.4
Vp-p
VOLT/DIV : 200 mV AC
TIME/DIV : 0.5
µ
sec
4
IC702
#¡
(MNT3)
VOLT/DIV : 1 V AC
TIME/DIV : 50
µ
sec
2
IC702
@∞
(XPCK)
VOLT/DIV : 1 V AC
TIME/DIV : 0.1 msec
5
IC702
#™
(MNT1)
VOLT/DIV : 1 V AC
TIME/DIV : 50
µ
sec
3
IC702 @•
(RFCK)
VOLT/DIV : 1 V AC
TIME/DIV : 50
µ
sec
6
IC702 #∞
(XTAO)
VOLT/DIV : 0.2 V AC
TIME/DIV : 50 nsec
4.8 Vp-p
242.0 µ sec
5.3 Vp-p
140.5
µ
sec
5.3 Vp-p
140.5
µ
sec
5.3 Vp-p
140.5
µ
sec
0.8 Vp-p
16.9344 MHz
(PLAY MODE)