Sony SPP-Q123, Руководство по обслуживанию

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SPP-Q123
– 19 – – 20 –
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 /
4
W or less unless otherwise
specified.
• ¢ : internal component.
For printed wiring boards.
Note:
• X : parts extracted from the component side
• : carbon pattern.
•
r : Through hole.
• b : Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• U : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 9V and fed with regulated dc power
supply from external power voltage jack. (base unit)
• Power voltage is dc 12V and fed with regulated dc power
supply from MJ201 with 100
Ω
in series. (base unit)
• Power voltage is dc 4V and fed with regulated dc power
supply from external battery terminal (CN201). (handset)
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : TALK
• 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.
P
: bell
WAVEFORMS
– BASE UNIT SECTION –
1
2
IC501
9
IC101
3
– HANDSET SECTION –
1
2
IC501
@º
IC101
3
Note: The components identified by mark ! or dotted line
with mark ! are critical for safety.
Replace only with part number specified.
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.
6.8 Vp-p
4.048 MHz
1.2 Vp-p
10.22 MHz
4.1 Vp-p
4.048 MHz
1.1 Vp-p
10.2 MHz