Note For Printed Wiring Board And Schematic Diagrams - Sony WM-FX888 Service Manual
Radio cassette player
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Also See for WM-FX888:
- Operating instructions manual (60 pages) ,
- Operating instructions (2 pages)
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Q Q
3 7 6 3 1 5 1 5 0
6-3.
NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAMS
Note on Printed Wiring Board:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Parts on the pattern face side seen from
(Side B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Side A)
the parts face are indicated.
• This board is four-layer printed board.
However, the patterns of layers 2 and 3 have not been in-
cluded in the diagram.
T E
L
1 3 9 4 2 2 9 6 5 1 3
w w w
.
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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.
• All resistors are in Ω and
1
/
W or less unless otherwise
4
specified.
• C : panel designation.
Note: The components identified by mark 0 or dotted line
with mark 0 are critical for safety.
Replace only with part number specified.
• A : B+ Line.
• H : adjustment for repair.
• Total current is measured with no cassette installed.
• Power voltage is dc 1.5V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground in
no-signal (detuned) conditions.
no mark : PLAYBACK
(
) : FM
〈〈
〉〉 : AM
• Voltages are taken with a VOM (Input impedance 10 MΩ).
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.
F
: FM
f
: AM
E
: PLAYBACK
x
a o
u 1 6 3
y
i
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8
9
• Waveforms
1 IC3 uf (XOUT)
940 mVp-p
13.3 µs
2 Q801 (Collector)
3.5 Vp-p
192 ns
3 Q801 (Base), Q803 (Emitter)
Q
Q
3
7
6
3
1
5
1
2 Vp-p
167 ns
4 Q802 (Collector), Q803 (Base)
0.3 Vp-p
184 ns
c o
.
15
15
2
4
2
9
8
5
0
8
9
2
4
9
8
2
m
WM-FX888
9
9
9
9
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