Icom IC R8500 Service Manual Addendum page 47

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