Sony BM-87DST Marketing, Руководство по обслуживанию

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BM-87DST
6-4. SCHEMATIC DIAGRAM (SERVO SECTION)
1
M901
VOLT/DIV : 0.5 V AC
TIME/DIV : 2 msec
2.8Vp-p
3.8 msec
z
Waveform
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.
•
U
: B+ Line.
•
H
: adjustment for repair.
• Power voltage is dc 9 V and fed with regulated dc power
supply from external power voltage jack (J103).
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark
: LISTEN
( ) : REW
< > : FF
• 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.