Diagrams - Sony XR-4900 Service Manual

Fm/mw/sw cassette car stereo
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3 7 63 1515 0
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1
/
W or less unless otherwise
4
specified.
: internal component.
¢
• C : panel designation.
• U : B+ Line.
• Power voltage is dc 14.4V and fed with regulated dc power
supply from ACC and BATT cords.
• Voltage and waveforms are dc with respect to ground
under no-signal conditions.
no mark : FM
<
> : TAPE PLAYBACK
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
f
: AM (MW)
E
: TAPE PLAYBACK
TE
L 13942296513
For printed wiring boards.
Note:
• X : parts extracted from the component side.
: internal component.
¢
• b : Pattern from the side which enables seeing.
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.
http://www.xiaoyu163.com
SECTION 6

DIAGRAMS

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– 18 –
http://www.xiaoyu163.com
2 9
8
• Waveforms
1
2.8Vp-p
18.432MHz
IC501 !™ OSC2
2
5.0Vp-p
32.768kHz
IC501 !§ XO
Q Q
3
6 7
1 3
1 5
co
.
9 4
2 8
0 5
8
2 9
9 4
2 8
m
9 9
9 9

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