Note For Printed Wiring Board And Schematic Diagrams - Sony WM-EX921 Service Manual

WM-EX921
6-2.

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
(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.
• Abbreviation
FR : French model
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.
• % : indicates tolerance.
• 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.
• 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 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.
E : PLAYBACK
• Abbreviation
FR : French model
• Waveforms
1 IC705 wh (CB2)
1.3 Vp-p
61 µ s
2 IC705 wl (XT1)
2.3 Vp-p
30.5 µ s
3 IC705 ef (OSC1)
2.3 Vp-p
1.8 µ s
4 IC705 rg (MOTOR W), rh (MOTOR V),
rj (MOTOR U)
1.3 Vp-p
6.6 ms
5 IC701 5 (LX)
3 Vp-p
3 µ s
14 14
6 IC601 4 (UIN), 5 (VIN), 6 (WIN)
1.3 Vp-p
6.6 ms