Note For Printed Wiring Board And Schematic Diagram - Sony MDR-NC11 Service Manual

3-2.

NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAM

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.
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.
• A : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground in
no-signal conditions.
no mark : POWER ON
( ) : POWER OFF
• 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 : LINE INPUT (POWER ON)
J : LINE INPUT (POWER OFF)
• Waveforms
1 IC102 1 (S.D), Q101 (Collector)
20 mVp-p
36.4 µs
2 Q201-1 (Base)
1.1 Vp-p
36.4 µs
3 Q201-1 (Collector), Q202-1 (Base)
0.8 Vp-p
36.4 µs
4 Q201-2 (Base)
0.8 Vp-p
36.4 µs
5 5
MDR-NC11
5 Q201-2 (Collector), Q202-1 (Collector), Q202-2 (Base)
1.3 Vp-p
36.4 µs
6 Q202 (Emitter)
70 mVp-p
36.4 µs
7 Q202-2 (Collector)
20 mVp-p
36.4 µs