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ECM-TS125
2-1. SCHEMATIC DIAGRAM
MIC UNIT
(L CH)
2
(R CH)
2.9
C14
R12
1
2.2M
F
2.3
1.0
C12
Q1
0.5
0.01
2SC4116YG
F
MIC AMP
C24
R22
1
2.2M
F
2.3
1.0
C22
Q2
0.01
0.5
2SC4116YG
F
MIC AMP
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.
•
%
: indicates tolerance.
• C : panel designation.
• U : B+ Line.
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
SECTION 2
DIAGRAMS
L
R
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: MIC
— 3 —
2-2. PRINTED WIRING BOARD
1
A
B
C
J1
MIC IN
D
E
BATTERY
S1
F
S1
POWER
ON
OFF
TOTAL CURRENT
MIC UNIT
CONNECT : 700uA
C1
DISCONNECT : 460uA
G
LITHIUM BATTERY
H
16
• Semiconductor
Location
Ref. No. Location
D1
F-2
D2
F-3
D3
D-2
D6
H-3
D7
G-3
D10
B-3
D20
B-4
Q1
E-3
Q2
D-3
2
3
4
MIC UNIT
UNIT BOARD
UNIT BOARD
(SIDE A)
(SIDE B)
MIC1
(L CH)
MIC2
(R CH)
11
L
R
1-673-682-
(11)
MINI PLUG
(MIC OUT)
AMP BOARD
AMP BOARD
(SIDE A)
C24
R23
Q2
R21
Q1
R11
C12
R14
CHECK
LAMP
LITHIUM
R3
BATTERY
CR-2025
3V
R1
D7
C2
D6
11
(11)
1-672-000-
MINI
(MIC OUT)
PLUG
Note on Printed Wiring Board:
• X : parts extracted from the component side.
•
: Through hole.
®
• b : Pattern of the rear side.
Caution:
Pattern face side:
Parts on the pattern face side seen from
(Conductor B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(Component A)
the parts face are indicated.
— 4 —
5
6
7
11
1-673-682-
(11)
(SIDE B)
11
(11)
1-672-000-
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