Icom IC-2820H Service Manual page 42
Dual band fm transcever
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Also See for IC-2820H:
- Instruction manual (164 pages) ,
- Service manual (56 pages) ,
- Basic operations (4 pages)
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• HM-133 (BOTTOM VIEW)
[PTT]
C
4 1
2 1
R
1 1
R
7 R
C
7 2
9 R
I
3 C
R
9 1
R
0 1
R
7 2
2 1
D
4 D
R
3 4
C
3 1
R
9 4
R
1 5
R
0 5
3 D
R
4 4
6 D
R
2 2
R
8 4
1 C
R
7 4
D
0 1
7 D
9 D
R
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D
1 1
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3 R
2 R
R
4 1
2 C
R
3 1
C
6 2
C
1 3
R
6 1
R
5 1
MIC
MC1
MICE
• CONTROL UNIT (BOTTOM VIEW)
5
GND
RVOL
+3.2V
RSQL
1
+3.2V
J3 (CONTROL UNIT)
J5
HV
GND
RDATA
TDATA 4
2820̲A3format.indd 8-9
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• MAIN UNIT (BOTTOM VIEW)
V
1
5
5
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1
5
0
V
1
4
5
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1
4
0
R
1 4
J2
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1
2
MICU/D
EXTMIC
2 R
4
1
PTT
MICE
MIC
GND
7
8
MICIN
9 C
C
0 1
3 C
6 4
R
8 3
1 L
4 0
2 C
1 8
D
1 6
• VR1 UNIT
(BOTTOM VIEW)
L
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D
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2
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2 2
0
J4 (CONTROL UNIT)
5
GND
LVOL
+3.2V
LSQL
1
+3.2V
• VR2 UNIT
(BOTTOM VIEW)
1
V
1
3
5
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1
3
0
V
1
2
5
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1
2
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1
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1
1
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1
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1
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0
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5
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9
0
C
2
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2
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8 - 2
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3
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2
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2
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1
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3 6
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0 2
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I
9 C
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6 8
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2 3
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7 R
2 8
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3 8
C I
7 3
6 C
4 6
6 C
8 6
6 C
0 7
6 J
J
3
S-14325XH-P2
Printed in Japan
© 2007 Icom Inc.
2007/04/02 9:09
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