Sony SPP-SS964, Руководство по обслуживанию

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SPP-SS964
– 29 – – 30 –
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 /
4
W or less unless otherwise
specified.
•
C
: panel designation.
Note on Printed Wiring Board:
• X
: parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
p
: parts mounted on the conductor side.
•
b
: Pattern from the side which enables seeing.
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.
C
B
These are omitted.
E
Q
• Indication of transistor.
• U : B+ Line.
• Power voltage is dc 9 V and fed with regulated dc power
supply from external power voltage jack (J601 on the
BASE MAIN board).
• Power voltage is dc 12 V and fed with regulated dc power
supply from modular jack (MJ101 on the BASE MAIN
board) with 100
Ω
in series.
• Power voltage is dc 3.6 V and fed with regulated dc power
supply from battery terminal (CN301 on the HAND MAIN
board).
• Voltages and waveforms are dc with respect to ground in
test mode.
• 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.
N : RX
F : RX(INTERCOM)
O
: TX
e
: TX(INTERCOM)
P : bell
7-3. NOTES FOR PRINTED WIRING BOARDS
AND SCHEMATIC DIAGRAMS • Waveforms
– BASE MAIN Board –
1
IC751
(¶
(XTALI)
– HAND MAIN Board –
1
IC501
(¶
(XTALI)
4 Vp-p
104 ns
2.9 Vp-p
104 ns
Note: The components identified by mark ! or dotted line
with mark ! are critical for safety.
Replace only with part number specified.