C-357
SECTION 3
DIAGRAMS
3-1. PRINTED WIRING BOARD
— 5 —
3-2. SCHAMITIC DIAGRAM
— 6 —
Note on Printed Wiring Board:
•
X
: parts extracted from the component side.
•
®
: Through hole.
•
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.
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.
•
%
: indicates tolerance.
•
C
: panel designation.
•
U
: B+ Line.
• Power voltage is dc 1.5 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• 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.
F
: MIC
Ref. No.
Location
D1
F-3
D2
I-3
D3
H-3
D4
B-3
D5
B-3
D6
G-3
D7
G-2
IC1
G-2
Q1
B-5
Q2
C-3
Q3
I-3
• Semiconductor
Location
1
D6 ANODE
5
µ
sec/div
20V/div
•
Waveform
MIC1
•TOTAL CURRENT
7 mA
CAPSULE
DRY BATTERY
SIZE"AA"
(IEC DESIGNATION R6)
1PCS,1.5V
CL-220HR-C
BATTERY CHECK
INDICATOR
(
)
POWER/LOW-CUT
D-D CONV.
R24
100K
R25
47K
POWER/LOW-CUT
H
H
TYPE
8
(DIRECTIVITY)
UNI
OMNI
C16
0.0012
19.6
999.99M
999.99M
46.4
24.0
0
0
0
0dB
-10dB
AMP BOARD
(SIDE B)
AMP BOARD
(SIDE A)
1-671-801-
12
1-671-801-
12
DRY BATTERY
SIZE"AA"
(IEC DESIGNATION R6)
1PCS,1.5V
T1
RED
RED
WHT
PUL
YEL
YEL
YEL
BRN
BRN
BLU
GRN
BLU
BLK
WHT
R3
D5
D5
D4
R5
R9
R25
R24
C16
C13
R4
C
E
B
R10
R8
R7
R19
Q2
C6
C5
C4
R18
R16
SW1
SW3
SW3
R6
R22
R23
R11
R17
D3
R14
R15
C9
C12
D1
C7
C14
IC1
D7
T2
R20
R21
D6
C10
C11
R13
L1
L2
D2
E
C
B
3
4
6
1
1
3
2
R12
Q3
C8
CN1
1
2
3
MIC1
CAPSULE
C3
C2
C1
C15
R1
R2
POWER
/LOW-CUT
BATTERY
CHECK
INDICATOR
Q1
M
V
OFF
SW2
–1
–2
S
PAD
(DIRECTIVITY)
OMNI UNI
2
5
0dB
-10dB
1
2
A
B
C
D
E
F
G
H
I
J
3
4
5
6
7
16
