Icom IC R8500 Service Manual Addendum page 284

q
w
e
r
t
y
R248
3.83V
OPEN 7.88V
2.2k C210 10
u CLOSE 0V
+
Q47
R262
R249 2SC4081 IC20 M5282FP
10k +
10k
1 10
VCC2 VCC
2 9
IN+ VCAOUT
3 8
Q46
IN- CTL
4 7
DTA114EU
OUT VCAIN
5 6
GND NC
BEEP
R253
100k 6.22V C214 4.7
+
+
C206
3.12V
0.1
Q73
VOIC 2SK2036
R255
R259 R486
Q48 +
47k 22k 100k
2SC4081
C208
C218
i IC42
0.1 0.1
S-8054ALB-LM
3.63V
3.83V
+5
O I
+
R325
G
100
4.94V
IC29 BU4053BCF
o
1 16
Y1 VDD
2 15
Y0 Y
3 14
Z1 X
4 13
Z X1
5 12 IC30
Z0 X0
BU4053BCF
6 11
7.81V
INH A
!0
7 10 1 16
VEE B Y1 VDD
8 9 2 15
VSS C Y0 Y
7.78V 3 14
Z1 X
4 13
Z X1
!1 5 12
Z0 X0
!2 6 11
INH A
APF ON :0V 7 10
VEE B
OFF:7.78V
8 9
VSS C
!3
!4
!5
!6
!7
!8
!9
R292 100k
1
2
3
4
IC35 uPD4081BG
5.0V
1 14
@1 2 13
@2 3 12
P27 4 11
TXD 5 10
R516 3.3k
P34 6 9
(EUR,FRA ONLY)
7 8
R517 3.3k(USA,
FRA,DEN ONLY) P35
R518 3.3k(USA,
EUR,AUS ONLY) P36
@3
@4 RXD
W13
7.9V
@5 IC23 TA7808F
@6 +8
O I
-13.42V -8.1V
+
R291 G
R290 IC26 AN79L08M
27 10
@7 -8
I O
+ + + +
G
4.94V
IC17 TA7805F
+5
C259
D66 1SS355 O I
47
+
G
36.5V 23.8V
IC25 AN78L24M R289
C253 R288
47 10
33
+24
I O
+ + + +
5.0V
G IC38 TA7805F
L+5
O I
@8
+
G
@9
2 3
D39
1SS272 1 4
7.84V
1 4 Q51
L45
D40 2SC2873 IC24 TA7808F
2 3
7A06L-101K
1SS272
#0 2
O I
10
#1 Q52 +
3
2SC2873 G
6 4
7 5
9 1
L45
7010-2N-1768
#2
#3
#4
#5
12.97V
IC21 uPC1214H L39
6.9V
LW-15
Q71
2A1736
R265
13.5V
100 C215
R274 R510
0.22 10k 2.7
1 2 3 4 5 6 7 8
+ +
6.83V
AF MIN 0.5V +
1.2V
Q72
AF MAX 2.1V +
C226
2SK2036
+ + 470
1.8V R485
2.97V
220k
R273
10k
Q49
2SC4081
R455
C220 1k(EUR,AUS,
0.1
FRA,DEN ONLY)
1.39V
IC39 X9C503ST6 4.94V
PB2 R474 1k
/INC R472 1k 1 8
INC VCC
U/D R473 1k 2 7
+
U/D CS
3 6
VH VL
4 5
GND CW
C316
1
R366 2.7k
R482
100
4.8V C315
R301 C276 R311
1
R408 1M
56k 0.001 150k IC31d
R305 R307
NJM2902V
4 39k 150k
2 6 9 13 11
- 1 - 7 - 8 -
3 5 10 12
+ + + +
IC31a
11 IC31b IC31c
NJM2902V
NJM2902V
NJM2902V
Q2L
-7.76V
FL+8 FL-8
R309 82k
Q2H
+
R310 15k
MAIN-A UNIT
IC27 TC7W04F
9.98V
+
8 IC28
C269
DS14C232TM
10
7.37V
7 1 16
+
C1+ VCC 5.0V
2.37V 2 15
V+ GND
6 3 14
C1- T1O
-4.72V 4 13
C2+ R1I
5 5 12
+
C2- R1O
6 11
C267
V- T1I
7 10 DTX
10
5.23V T20 T2I
8 9
-9.96V
A2I R2O
DRX
+
Q53 XP4601
1 6
R296 33k
2 5
3 4 D43
1SS355
12.43V
AC ADAPTOR R280 IC22 PQ30RV31
5.0V 5.0V
1k
USED
16.3V
C387 (AC ADAPTOR USED)
13.7V
47p
4 3 2 1
+
+
R281 27
R286 56
12.25V
R244 27
F2 F2
+
R245 27 L44 F1
SK-17P-070-110
C389
47p
D56
11.39V 1SR154-400
R357
47
+
13.51V
RL1
L48
Q50
7A06L-101K
2SC4081
R283
J12
10k
GND VOIC
+ +
+5
2
I C 3
J32
1
R16
DISC
3
AOUT
100K
AGC
NJM2902V
J18
AOUT
AGC OUT
J19
PH 6
I C 3
Q1
PHG
7
EXSP FROM
5
JACK
PHG
UNIT
D TC144EU
REC
J4 NJM2902V
RECG
J20
P1
INSP INSP SP1
NC NC
+
SPE SPE
-
COVER MIX-A UNIT
J 2
J21
C28
EXSP
T M P - J 0 1 X - V 6
470P
INSP
EXT SP
ESPG
J23
13 V 2 L o ( 2 5 6 / 7 6 8 M H z )
25
12 F R O M P L L - B
24
11
23
10
22
J 4
9
T B P - P 0 1 X - A 1
21 P2
8
20
7 TMP-K01X-A1
RS-232C
19
6
18
V 2 I F ( 1 0 . 7 M H z )
5
17
TO MAIN-A
4
16
3
15
2
14
1
P1
J22
CI-V
NC
CI-V TMP-K01X-A1
GND
J 3
V 1 I F
T B P - P 0 1 X - A 1
T O R F - D
J14
ACHV
DC IN
NC
GND
J15 J3 P2
P1 BPF2
DCIN DCIN
DOUT DOUT
GND GND
CHASSIS
J16
HV1
HV2
LHV1 FROM POWER SW
LHV2
BPF1
- 8
F I L S
4
V+ 13
I C 3 I C 3
R21
GND NJM2902V 14
11 12
100
NJM2902V
R17
9 I C 3
R22
8
10
100
NJM2902V
100K
Q2
1 5
2
3 4
XP1213
D5
C31 C32
6
47P 0 . 0 0 1
I C 2
R13
R10 470P
1 4
C29 C30
18 5 . 6
470P UPC2710TB 1SV237
2 3 5
L 1 2 1 L 1 2 0 L 1 2 2
0 . 5 6 U 0 . 5 6 U 82N
8 . 8 N
C22
1P
L 1 4
#302HEP
D1
L 1 C2 L 2 3
C1
47N 7P 12N
0 . 0 0 1
1SV237
MP 5
1768
D3 F I 1
C11
I O
2 3
0 . 0 0 1
1 4 MBF-778A
MA862
(7 7 8 . 7 M H z )
R19
Q4
2SC4835
4 . 7 K
11 - 8
MMZ1608Y102BT
MMZ1608Y102BT
MMZ1608Y102BT J 1
MMZ1608Y102BT
10
E P 6 8
9
E P 6 7
8
E P 6 6
7
E P 6 5
6
5
4
3
2
1
E P 6 3
E P 6 2 5 2 6 1 0 - 1 0 7 1
E P 6 1 FROM MAIN- A
MMZ1608Y102BT
MMZ1608Y102BT
MMZ1608Y102BT
MMZ1608Y102BT
Q3
5 1
4
3 2
XN1114
L 1 6 L 1 7 L 1 8
L L 1 6 0 8 27N 1U
C48
C50
4P
3P
D6
1SV237
L 2 1 L 1 2 L 1 3 L 1 9
8 . 2 N 10N 12N 1U
C35
C37
0 . 7 5 P
0 . 5 P
I C 1
0 . 0 0 1
6 1
L 8 5 2
C54
4 3
5MXE14
C20
470P
C6
20P
L 1 5 #252HEP
7P L 3 D2
C7
39N 1SV271
(2 6 6 . 7 M H z )
R3
470
F I 2
C16 D4
I O
0 . 0 0 1
MA77
MBF-778
R20
Q5
2SC483 5
4 . 7 K
R7
470