Read Sony XR-3753 / XR-C353 (serv.man2) Service Manual online
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2.
MAIN BOARD MODIFICATION
•
New/Former Discrimination
Former type: 1-664-751-11
New type : 1-664-751-12
New type : 1-664-751-12
[MAIN BOARD]
(COMPONENT SIDE)
2-1.
NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
¢
: internal component.
•
C
: panel designation.
•
U
: B+ Line.
• Power voltage is dc 14.4 V and fed with regulated dc power
supply from battery and accessory terminals.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
(
no mark : FM
(
) : MW (LW)
〈〈
〉〉
: TAPE PLAYBACK
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
f
: MW (LW)
E
: TAPE PLAYBACK
L
: BUS AUDIO IN
• Abbreviation
3753 : XR-3753
C353 : XR-C353
C353 : XR-C353
Note on Printed Wiring Board:
• X
• X
: parts extracted from the component side.
•
p
: parts mounted on the conductor side.
•
¢
: internal component.
• b
: Pattern from the side which enables seeing.
• Abbreviation
3753 : XR-3753
C353 : XR-C353
C353 : XR-C353
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