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iC- r8500
Service manual addendum
Icom IC R8500 Service Manual Addendum page 47
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:
Service manual
(101 pages)
,
Instruction manual
(48 pages)
,
Service manual
(100 pages)
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Apr. 2011
SECTION 11
VOLTAGE DIAGRAM
FRONT UNIT
MF1
S2
UP
[MAIN DIAL]
E
DN
S1
P1
HV1
1
TO MAIN UNIT
HV2
[POWER SW]
2
LHV1
J16
3
LHV2
4
SW-A BOARD
[WFM]
[FM]
[AM]
[SSB/CW]
[TS ]
[TS ]
[NB/AFC]
[AGC]
[10dB]
[20dB]
[LOCK]
[APF]
SW-B BOARD
[1]
[4]
[7]
[.]
[PROG]
[SKIP]
[M-SET]
[2]
[5]
[8]
[0]
[MEMO]
[SEL]
[M-CL]
[3]
[6]
[9]
[CE]
[AUTO]
[VSC]
[BANK]
[MCH]
[ENT]
[PRIO]
[DELAY]
[MW]
J1
J1
REC1
[REC REMOTE]
1
REC2
2
GND
3
PH
4
PHG
5
PHG
6
J2
FXSP
7
[REC]
REC
8
RECG
9
J3
R4
220
R3
220
[PHONES]
R2
220
R1
220
JACK BOARD
IC5
PQ200WNA1ZPH
G
6
5
4
3
R25
R26
CP1
R22
R51
METV
METV
15K
ERJ3GE-JPW
2.7K
4.7K
R24
CP07VR
R23
10K
C5
10K
CP2
4.7
GND
GND
CP07VR
L+5
L+5
SE2
SE2
R28
R29
SE1
SE1
47K
100K
R27
C10
100K
0.001
R32
R33
47K
100K
R31
C11
100K
0.001
S1
ESB-64620
P17
PB6
J2
J1
GND
GND
1
9
PB0
PB0
2
8
PB1
PB1
3
7
PB2
PB2
4
6
PB3
PB3
5
5
PB4
PB4
6
4
PB5
PB5
7
3
P17
P17
8
2
P16
P16
9
1
AN11
1
2
X1
3
C1
9.8304MHz
4
5
12P
R1
6
1M
7
C2
8
9
12P
10
11
DB0
12
DB1
13
DB2
14
DB3
15
DB4
16
DB5
17
DB6
DB7
18
R49
R50
LA
19
22K
22K
LE
20
LRES
21
C20
J1
J3
22
0.01
GND
23
GND
14
1
GND
24
GND
13
2
GND
25
GND
12
3
PB4
PB4
11
4
PB5
PB5
10
5
PB6
PB6
9
6
PB3
PB3
8
7
PB2
PB2
7
8
PB1
PB1
6
9
PB0
PB0
5
10
P11
P11
4
11
P12
P12
3
12
P13
P13
2
13
P10
P10
1
14
VR-A BOARD
R1
J4
J1
GND
GND
[APF]
1
6
SFT2
STF2
6
2
5
APFV
APFV
5
R45
AN11
3
4
SFTV
10K
SFTV
4
R46
AN10
4
3
L+5
10K
L +5
3
[SHIFT]
5
2
SFT1
STF1
2
6
1
1
C17
C18
RV-306
0.0047
0.0047
VR-B BOARD
R1
J1
J5
PB2
PB2
PB2
6
1
GND
GND
5
[MEMO]
2
P10
P10
P10
4
3
R47
AN9
DELV
DELV
3
4
PB3
10K
PB3
PB3
2
5
[DELAY]
L+5
L+5
1
6
R52
C19
100
RV-307
0.0047
D2
J6
1SS355
REC1
3
RL1
REC2
2
GND
1
P1
W8
PH
1
PHG
2
TO MAIN UNIT
W7
EXSP
3
PHG
J19
4
ATQ203SAZ
W6
REC
5
RECG
6
23
HRS-4160A X4
DS4
DS5
DS2
DS3
2
1
R56
C7
0.01
10
DS1
DLC-7982YBGT
C9
10
Q7
DTC144EU
R30
1M
9
10
8
IC3
BU4030BF
R34
1M
12
11
13
IC3
BU4030BF
75
74
73
72
71
70
69
68
67
66
65
IC1
64
HD6433832SD96HV
63
62
61
60
59
58
57
56
55
54
53
52
51
R2
R3
R4
R5
C13
0.01
10K
10K
10K
10K
C14
0.01
Q2
DTA144EU
Q3
R42
DTC144EU
R53
AN7
100
R41
C15
10K
RV-305
Q4
0.0047
Q6
DTA144EU
AF VR
D TC114EU
Q5
R44
AN8
DTC144EU
R43
10K
C16
RV-305
0.0047
SQL VR
100K
100K
C3
0.01
SG40
SG39
DCM 7
39
SG38
40
SG37
41
SG36
42
SG35
43
SG34
44
SG33
45
SG32
46
SG31
47
48
SG30
49
SG29
DT68
50
SG28
DT67
IC2
51
SG27
DT66
S1D15206F00A200
52
SG26
DT65
53
SG25
DT64
54
SG24
DT63
SG23
DT62
55
SG22
DT61
56
SG21
DT60
57
SG20
DT59
58
SG19
DT58
59
SG18
DT57
60
SG17
DT56
61
SG16
DT55
62
DT54
63
DT53
64
14
V+
IC3
BU4030BF
GND
IC71
7
1
5
OUT
CD
2
VDD
3
4
VSS
NC
BD5242G
IC3
BU4030BF
5
4
6
IC3
BU4030BF
1
3
2
DISP-A UNIT
R6
R7
R8
R9
R10
3.3k
4.7K
4.7K
4.7K
4.7K
100K
128
127
126
125
124
123
122
121
120
119
118
117
DT00
116
DT01
115
DT02
114
DT03
113
DT04
112
DT05
111
DT06
110
DT07
109
DT08
108
DT09
107
DT10
106
DT11
105
DT12
104
DT13
103
DT14
TO MAIN UNIT
J7
+ 13.8V
1
L+5V
2
GND
3
GND
4
MRXD
5
MTXD
6
GND
7
C22
C21
0.01
0.01
TO MAIN UNIT
R57
J8
10
FANV
1
NC
2
NC
3
GND
4
Previous
Page
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Page
1
...
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45
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47
48
49
50
51
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