Sony Walkman WM-EX921, Руководство по обслуживанию

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WM-EX921
14 14
1.3 Vp-p
6.6 ms
3 Vp-p
3
µ
s
2.3 Vp-p
1.8
µ
s
2.3 Vp-p
30.5
µ
s
1.3 Vp-p
61
µ
s
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
(Conductor Side) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Component Side) the parts face are indicated.
6-2. NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAMS
Note on Schematic Diagram:
• 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.
• % : indicates tolerance.
• C : panel designation.
•
A
: B+ Line.
• H : adjustment for repair.
• Power voltage is dc 1.3V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground in
playback mode.
no mark : PLAYBACK
(
) : DOLBY NR ON
• 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.
E : PLAYBACK
• Abbreviation
FR : French model
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
• Abbreviation
FR : French model
• Waveforms
1
IC705
wh
(CB2)
2 IC705 wl (XT1)
4 IC705
rg
(MOTOR W),
rh
(MOTOR V),
rj (MOTOR U)
3 IC705 ef (OSC1)
5 IC701 5 (LX)
6
IC601
4
(UIN),
5
(VIN),
6
(WIN)
1.3 Vp-p
6.6 ms