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5-4. SCHEMATIC DIAGRAM — BASE SECTION — • Refer to page 37 for IC Block Diagrams.
– 27 –
SPP-874/884
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
/
W or less unless other-
4
wise specified.
•
: internal component.
¢
• C : panel designation.
• U : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 9 V and fed with regulated dc
power supply from external power voltage jack.
• Voltage is dc with respect to ground under
no-signal condition.
• Voltage dc with respect to ground under no-signal
conditions.
• Voltages are taken with a VOM (Input impedance
10 MΩ).
Voltage variations may be noted due to normal pro-
duction tolerances.
• Signal path.
N
: RX
O
: TX
P
: bell
• Abbreviation
E12
: 220-240V area of E model
E92
: 120V area of E model
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