Icom IC R8500 Service Manual Addendum page 106

Sep. 2010
1
2
3
4
5
6
7
C159
10
+
R62 2.51V
+
R235
470k
IC13a
100k
8 NJM2904V
3
R234
+ 1
6 100k 2
-
- 7
4
5
R61
+ CP5
8 330k IC4b
R65 D28
NJM2904V 100k 6
DAN222
+ 7
5
-
9
IC13b
R60 R59 NJM2904V
300k 100k
!!0
!!1
!!2
!!3 6.35V
IC7 uPC1037GR
R151 100
8 1
!!4
CARI VCC
R147
7 2
BYPS OUT1
6.8k
!!5 6 3
SIGI OUT2
5 4
GND NC
!!6
!!7
!!8
6.19V
R145
15k
2.35V
R507 6.91V
3.3k
C111
220p
Q18
2SC4081
L25
1.13V
LS-451
!!9
3.61V
Q17
@0 3SK131
L26
LS-450
FM,
1.12V
AM
4.81V
C335
@1
0.1
L24
470uH
FM,
@2
AM
@3
1.65V
R186
@4
10k
Q25
XP1213
Q25
Q21
2SA1586 DTA114EU
@5 5 1
2
+
@6
4 3
+
Q60 R394
10k
DTC144EU
@7
R454 -7.87V
4.7k
R187
4 1
D19
1k
1SS272 3 2
CP4
R401 4 1 Q27
82k
@8 3 2 2SC4081 D20
1SS375
@9
+ D21
DAN222
#0
#1
#2
#3
#4
#5
#6
L49 +
100uH
L51 +
R435 2.2M
100uH
4.88V
C342 C344
4.02V R436
0.0012
47p
9
100
8
10
IC41a
IC40c
C348 TC74HC74AF
TC74HC86AF
220p
C346
Q65
47p
2SK882
5.41V
1.32V
Q66
2SC4081
R437 2.2M
R438
12 100
11
13
#7
IC40d
TC74HC86AF
#8
#9
$0
$1
$2
$3
$4
MAIN-A UNIT
D62 4.9V
CP3
DAN222
STOP
R237
Q31
10k
DTC144EU
(e)
AM
7.85V (f)
Q70
DTC144EU
CMAD
AFWF
(g)
C109 R148 R149
0.1
6.8k 10k
AFSB
(c)
(d)
R324
100
C131
10
C115 R155 R174 10k
R158 C118 R383
+8
0.0047 1k 0.1
6.8k 8.2k
IC4a
8
NJM2904V
3
+ 1
2
-
R497
4
D15
4.7k
R419 1SS375
680
IC9b
R319
FM,
NJM4558M
1.8k
AM
5
3.0V
+ 7
6 C285
-
0.0047
R322
D16 1SS355
Q64 100k
2SC4681 FIL2
AM,FM-N
7.43V
Q59
DTC144EU Q74 R514
DTC144EU 470
1
2
3
+
IC8 MC3372SVM
4
+
C119 R161
1 16
0.1 CRYSTAL MIXER
1.8k
2 15
CRYSTAL GND
3 14
MIXER MUTE
C120
4 13
0.1 VCC METER
5 12
C283
LIMIT SQUELCH C282
6 11
220p
DECOUP FILTER 22p
R162
7 10
47k LIMIT FILTER
8 9
QUAD AUDIO
C330 C383
R316 R404
1k 0.001 0.0047
R315 470
1.5k
R480
C367
4.7k
0.1
R165
10k
X2
CDBC455CX16-TC R163 R164 C332
100k 10k 0.01
Q69 XP4311
4 3
IC40a
14
TC74HC86AF 5 2
1
3
2
6 1
7 C349 +
0.0047
2 5
D Q C350 D60
3 6 12 9
CK D59 D Q 0.0047 1SS355
Q
11 8
1SS355
CK Q
R441 R445
Q67
4 100 1k
2SC4081
6
5
IC41b
TC74HC74AF
IC40b
TC74HC86AF
27
WFM8
MST2
Mdat
Mck
DE
MST1
Q33 XP1213
/WF8
FILC 4 3
MST1 1
Q32 2
SSB8 Mdat 2
DAT114EU
FILP 5 1 Mck
Q34 XP1213
NRS1 4 3
2
NRS2 5 1
AM8
MST3 MST3 1
Mdat 2
FM5 Mck
F1
F2
F3
F4
SW
R175 FTIS
22k
NOAD Q35
D55
Q36
RN2427
1SS355
DTC144EU
MI5V
(b)
C130
0.1
(b)
9.83MHz
IC43 TC4W53F
7.90V MRXD
8 MTXD
7
6
5
Q75
DTC144EU
7.81V
R415
470k
C129
8 0.1
3
1 AFFM
+
2
C334 -
4
0.022
IC32a
FI+8
R493 NJM2904V
R414
FI-8
3.9K
18K ERJ3GE
P95
-7.76V P94
P93
(g)
VBSY
IC37
4.96V
S-8054ALB-LM DE
Mdat
O I
Mck
G
(f) VSTB
MST2
AM
3.5V
MST1
(e) MST3
Q57
STBA
2SC4081
R336
STBC
220k
STBB
Q68
STBF
DTC144EU
SMAD R354 1k
CMAD R356 1k
MDAD R355 1k
STOP R349 1k
LVDA R359 1k
VSC R347 1k
L1AD R345 1k
EVM R346 1k
R240
47k
D44
IC18 BU4094BCF
1SS272
MST2 1 16 1 4
STRB VDD
Mdat 2 15 2 3
DATA DENA
Mck 3 14
CLK Q5
4 13
Q37 XP1213
Q1 Q6 Q41 XP1114
5 12
Q2 Q7
6 11 3 4 3
Q3 Q8
7 10
Q4 Q'S 2 2
8 9
VSS QS
1 5 1
Q40 XP1213
3 4
4.93V
2
IC15 BU4094BCF
16 1 5
STRB VDD
15
DATA DENA
3 14 AGCF
AGC-F
CLK Q5
4 13 ISW1 ON
Q42 XP1213 Q43 XP1114
Q1 Q6
5 12 ISW2 :5.0V
Q2 Q7
0FF
6 11 IFBK 3 4 3
Q3 Q8 :0V
7 10
Q4 Q'S 2 2
8 9
VSS QS
1 5 1
3 4 3
IC16 BU4094BCF
2 2
16
STRB VDD
15 1 5 1
DATA DENA
3 14
CLK Q5
4 13
Q1 Q6 Q44 XP1213
Q45 XP1114
5 12
Q2 Q7
6 11 AGCF
Q3 Q8
7 10
Q4 Q'S
8 9
VSS QS
Q63
D63
DTC144EU
DAN222
4.6Vp-p
1
RES
2
XTAL
3
C288 EXTAL
4
12p
MO1
5
C289 MO0
6
12p NMI
7
STBY
R456
8
VCC
1k
POC 9
P52/SCKO
10
P51/RXDO IC33
11
P50/TXDO HD6433334YLO2F
12
VSS
VBSY 13
P97/WAIT
14
P96-0
P95 15
P95/AS
P94 16
P94/WR
P93 17
P93/AD
OE 18
P92/IRGO
R340 MDAR 19
P91/IRGI
1k
MCK 20
P90/ADTRG/IRG2
R457 1k
R458 1k
D64
R459 1k
1SS355
R460 1k VSTB
R461 1k MST2
R462 1k MST1
R463 1k MST3
R464 1k STBA
R465 1k STBC
R466 1k STBB
R467 1k STBF
1
2
3
4
5
6
DISC
IC19d 7
BU4066BCF
AFWF 9 8
A B
Q55
DTA114EU
C
D31
R398
6 DAN222
22k
4
WFM 7.82V
5 IC19c
BU4066BCF
AFFM 4 3
A B
Q39 C
RN2427
R397
5
22k
Q56
IC19b
FM
DTA114EU BU4066BCF 8
7.85V
AFAM 11 10
A B
C
AM
7.83V
R247
12
22k
4
9
5 R246
220 IC19a
BU4066BCF
14
FIL1
AFSB 1 2
A B
4 FIL2
D32
G C
DAN222
R396
FIL3
7 13
!!0
2.2k
5
FILG
C203
ISW1 1 5 0.0047
!!1
2
!!2
ISW2 3 4
!!3 !
SSB,CW
Q54 XP1213
7.85V !!4
!!5
!!6 !
!!7 !
!!8 !
IC34 !!9
HN58C256FP-20
P25 1 28
A14 VDD
P24 2 27 P94
A12 WE
P17 3 26 P25
A7 A13
P16 4 25 P20
A6 A8
P15 5 24 P21
A5 A9
P14 6 23 P23
A4 A11
P13 7 22 P93
A3 OE
P12 8 21 P22
A2 A10
P11 9 20 P95
A1 CE
60 P14 P10 10 19 P37
P14/A4 A0 D7
59 P15 P30 11 18 P36
P15/A5 D0 D6
58 P16 P31 12 17 P35
P16/A6 D1 D5
57 P17 P32 13 16 P34
P17/A7 D2 D4
56 14 15 P33
VSS VSS D3
55 P20 @0 "
P20/A8
54 P21 @1
P21/A9
53 P22
P22/A10
52 P23
P23/A11
51 P24
P24/A12
50 P25
P25/A13
49 P26
P26/A14
48 P27
P27/A15
R352
47
VCC
120k
46 " @2 "
P47/PW1
45 W1
@3
P46/PWO
44
P45/TMRI1
43
P44/TMO1
42
P43/TMCI1
41 @4
P42/TMRIO
@5
@6
BEEP
R344
1k
D24 @7
DAN222
@8
D43
1SS272
R468
100
Pdat
PDE R469 100 @9
#0
PSIB R470 100
LCT1
PCX R471 100
D42
1SS272
#1
#2
#3
#4