ECM-957PRO
ECM-957PRO
8
8
3-2. SCHEMATIC DIAGRAM
T1
R6
T2
Q1
Q2
R1
R4
C1
R2
R3
C2
C3
R5
S1-1
Q4
C6
C7
R11
R7
R9
R8
Q3
D2
R10
C4
IC1
D1
S1-2
CN1
MIC1
MIC2
L1
C5
For Schematic Diagrams.
Note:
• All capacitors are in
μ
F unless otherwise noted. (p: pF)
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
speci
fi
ed.
•
A
: B+ Line.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltages is dc with respect to ground under no-signal (de-
tuned) conditions.
no mark : S1: 90
°
*
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal production
tolerances.
Note:
The components identi-
fi
ed by mark
0
or dotted
line with mark
0
are criti-
cal for safety.
Replace only with part
number speci
fi
ed.
Note:
Les composants identi
fi
és
par une marque
0
sont
critiques pour la sécurité.
Ne les remplacer que par
une piéce portant le nu-
méro spéci
fi
é.
