Icom IC-91A Service Manual page 45

12-2 MAIN UNIT
MAIN UNIT
A TONE ON: 3.25V
OFF: 0.50V
MAINR3A
AAM
Q150 R129
C132 Q105
100 C131
UNR9115J
0.001 UNR9115J 0.1
ACT
J702
CK C160 C159
0.001 0.001 A RX: 2.97V
VCC
A AM RX: 3.26V TX: 0.46V
DATA B RX: 0.16V
TX: 0V
MOD A FM RX: 0V
B FM RX: 0V
C158 100P
+5.5V
C144
SQL
1
PLLDATA R159 R158
1M 47K
HV
Q104
APLLSTB
R131 XP6501
TXC 4.7K
IC150
REFMOD C143
C157
NJM12904V 1
0.1
IOSTB1
R156
R157
BPLSTB 150K
68K
DASTB1
R155
BPS 330K
UNLK
IOSTB2
C153 R133
TTEMP
C154 R154 0.0015 2.7K
IOSTB3
to LOGIC 0.1 82K
unit J401 CHG
R153
BTONE
82K R152
DAFOUT 82K
R151
100K
ATONE
INTPTT
R150
+3V
C151 C150 10K C152
330P 0.0033 0.039
S-LV
BAF
VOL BAGC
BRSSI
DICK ANOIS
MAINR3
BNOIS
WFM
DIUD
ANOIS
B TONE ON: 3.21V
OFF: 0V
CLONE
BAM
AAF
INTSP
AFO MAINR3B
EXTMIC
C259
GND
BCT 0.001
C260
Q250
0.001 UNR9115J
C258 100P
R258
47K
R259
1M C256
0.1
IC250
C257
C713 C712
0.1 NJM12904V
0.001 0.001
R257
ACT 68K
IC703
CD4066BPWR
1 14
I/O1 VDD
ATONE R254
2 13 C254
O/I1 CONT1 82K
3 12 0.1
O/I2 CONT4
4 11
I/O2 I/O4
5 10 C715
CONT2 O/I4
0.001
6 9
CONT3 O/I3
7 8
VSS I/O3
BTONE
R251 R250
0 C250
10K
C711 0.0015
0.001
BRSSI
BNOIS
BAM
AAM
+3V
MAINR3A
IC700
CD4066BPWR C716
C700
1 14 0.001 0.001
I/O1 VDD
S-LV 2 13
O/I1 CONT1
3 12
O/I2 CONT4
LV 4 11
I/O2 I/O4
AR3C 5 10
CONT2 O/I4
DAFS 6 9
C717 CONT3 O/I3
7 8
0.001 VSS I/O3
R702
R703 2.7K 1k
DAFOUT
C723 47P C718 C701
BR3C 0.001 0.001
AR3C
R3C
IC701
CD4094BPWR
IOSTB3
1 16
STR V+
2 15
D OE
3 14 C702
CLK Q5 0.001
4 13
Q1 Q6
ACT
5 12
Q2 Q7
BCT 6 11
AAFS
Q3 Q8
W/N 7 10
Q4 Q'S
8 9
GND QS
IFC
BAM
AAM
VBUAC
300M800MC
IC702
CD4094BPWR
IOSTB2 1 16
STR V+
DATA 2 15
D OE
CK 3 14
CLK Q5
VBVCOC
4 13
Q1 Q6
UBVCOC 5 12
Q2 Q7
6 11
Q3 Q8
WFM 7 10
Q4 Q'S
8 9 C703
GND QS
0.001
A FM RX: 2.42V
TX: 0.46V
A WFM RX: 0V
B FM RX: 2.41V
C127
R121 0.47 R120
EP100 L102
1K A WFM RX: 3.35V
1.5K R118 R115 0.22U
C128 R116
12K TX: 0V
12K 12K
0.01 A FM RX: 0V
B FM RX: 0V
C116
R122 47K
0.1
R117
C115 C114
1k
0.1
D102 R108 10
Q103 1SS364 1.5K
C113
XP6501 FI100 0.01
CFWM450E
IC100
O I TA31136FNG
C137 C136
0.1 0.1 R114 1 16
OSCIN MIXIN
12K 2 15
GND
D104 OSCOUT
3 14
MA2S728 MIXOUT N-REC
4 13
C124 0.1 VCC N-DET
5 12
IFIN RSSI
6 11
IFOUT
DEC
7 10
FILOUT QUAD
D103 8 9
R126 FILIN AFOUT
33K 1SS364 R113
C142 C121
100P 120K 470P
R109 C119
R127 R125 C133
56K 0.001
4.7K 0.001
27K
C126
100P
C122 R111 C120
C118
470P 150K 0.001
R112 0.001
R110
1k 15K
R132
10K
C117
0.033
A FM RX: 0V C141 L103
B AM RX: 3.23V A RX: 0V 47P 0.22U
TX: 0V B RX: 2.93V
C138
B FM RX: 0V TX: 0V
0.01
FI200
CFWM450E
R222 EP200
Q204 C227
100 O I
UNR9115J 0.47
R217 R218
C236
1K 1.5K C241
0.1
C228 0.1 C216
C235 C234
R219 47K 0.01 0.1
0.001 0.1
D202
1SS364
C262 R220
1 150K FI201
C238
CFWKA450KHFA 0.1
R210
R305
R255 O I 1.5K
4.7K
330K C237
R233
C261 1 0.1
IC200
15K
TA31136FNG
R227
D204
12K
C223 1
D205 R223 MA2S728 C226 47P OSCIN
0.1 2
330K
MA2S111 OSCOUT
3
MIXOUT
R225 4
VCC
C224 0.1
4.7K 5
IFIN
R234 6
DEC
39K 7
FILOUT
R306
D203 8
FILIN
10K 1SS364
R216
C233 C221
120K
1 0.001
C253
0.0015
C222 R214 C220
0.001 150K 0.001
R252 C243 C240 R215
R253 82K 0.0047 1k
0.1 C242 A RX: 0V
82K
0.0047 B RX: 3.24V
Q205
R235
TX: 0V
UNR9115J 33K
C252
0.039
Q206
UNR9215J
R501
1k
R500
1 14 100K
I/O1 VDD
2 13
O/I1 CONT1
3 12
O/I2 CONT4
4 11
I/O2 I/O4
5 10
CONT2 O/I4
6 9
CONT3 O/I3
C501 7 8
VSS I/O3
0.001 A FM RX: 0V
A RX: 0V
B FM-N RX: 3.22V IC500 C503
B RX: 2.91V
TX: 0V 0.001
TX: 2.93V CD4066BPWR
B FM RX: 0V
R554
C554
0.01
R704
0
R553
18K
C550 R550
2.2K
1
C552
0.018
C551 R566
0.01 2.7K
C263
0.001
R552
10K
R560 C560
15K
0.1
R561
C559
180K 0.018
7.37V
VCC
Q601
XP1501
Q600
3 4 2SB1132
C704 C705 2
R600
0.001 0.001
C600 C601 1K
0.001 0.001 1 5
S701
SKHLLFA010
C602
0.001
R700
S700 C706
1K
SKHLLFA010 0.001
C605
Q602
0.001 Q603
XP1501 2SB1132
3 4
2
R601
C606
1K
0.001 1 5
C607 R602
0.001
10K
12 - 2
Q101 D100
UNR9215J C106 MA2S728
0.001 A RX: 3.18V
TX: 0.45V
B RX: 0.19V
R100
R104
220 15K
C104
R107 0.001 R101
Q102
47K 6.8K
XP1115 L100
0.22U D3
1SS364 C8 R9
C105 C9 0.01 180
15P 0.01
R10
Q100 R11 2.2K
2SC4215 2.2K
C24 0.0047
R106
820 L101 R105
12U
C111 680
82P
C17 0.1
R102 C102
0.01
47
A RX: 0.44V R19 R24
TX: 0V
2.2K 330
B RX: 0V
C25
0.0047
Q453
XP4315
4 3
C248 2P
C475
0.0047
5 2
L202 D200
0.22U MA2S728
C247 27P
6 1
C246 5P
A RX: 0.63V
C472 C474
L201 B RX: 2.08V
0.0047
0.001
0.22U TX: 0V R200
C245 27P 15K
R204
C204 R474
220
C215 0.001 2.2K
C214 R201
0.1 10 R209 R203 L200 6.8K
47K 1k 0.22U
16
MIXIN
15
C205
GND
14 A RX: 0V
47P
N-REC Q200
13 B RX: 0.25V
N-DET
C206 2SC4215 TX: 0V
12
RSSI
11 R205 0.1
IFOUT
10 1.2K
QUAD
9 C207
AFOUT C208 C59 R52
C211 82P
180
0.1 0.01
100P C203 R202
C219
0.01 47
0.001
C58
R206 4P
R212
C218 1k A RX: 0V
56K
B RX: 3.24V
0.001 R211
TX: 0V
1k
R208
R213
47K
Q201
27K
2SC4081
R207
C217 C209 C210
C452
0.0047 47K 0.1 0.001
1
R453
270K
C505
C504 C506
1 0.01 0.0033
C454 C453
0.001 0.001
R505 C509
220K IC501 0.1
R503 R504
NJM12904V
12K 680K
C507
1 8
0.01
2 7
3 6
C514 0.1
4 5
C508 R506 C512
R508
0.1 100K 0.0033
22K
R507 R509
C510 22K
22K
0.01
C513
0.0015
18K R555 18K
Q500
C511
UNR9215J
0.001
C555 C556
0.0047 0.0022
C563 R568
100
1
A RX: 2.44V
R556 B RX: 2.40V
180K TX: 0.47V
Q550
XP6501
C553
0.015
C557 Explanatory notes
0.1
R551
R557
6.8K
15K R564 C562
470K 0.1
R559
2.2K
C558
C561
Q552 R558 1
0.1
2SC4081
10
R562
1M
R565
390
C603
0.001
A RX: 3.28V
Q604
TX: 0V
XP1115
B RX: 0V
1 5
2
Q650
C604 3 4
UNR9211J
22
RX: 3.39V
TX: 0.47V
C650
A RX: 0V
0.001
B RX: 3.25V C651
TX: 0V 0.001
C608
0.001
C609
22
RX: 3.43V
TX: 0V
FI1
D2
FL-394 R8 C4
1SS364
270 0.01
4 1
GND IN
2 3
OUT GND
C5
7P R7
C7 A WFM RX: 3.31V
7P 2.2K
TX: 0V
C29
A FM RX: 0V
0.0047
C6 B FM RX: 3.33V
10P
A RX: 0V
B RX: 3.25V
TX: 0V
D10
HSB88AS
O I
R23 C16 R17 C13 R15 C10
0.1 0.01
0 100K 39P 100K
FI2 L1
IC50
SFECV13.35MAS EP50
0.18U
UPC2757TB
R18 Q2
Q1
330 2SC5006
4 3
2SC4081 R14 PS LO
5 2
C14 56
VCC GND
6 1
100P C12
IFO RFI
C15 R16 0.01
330 C52
0.01
C26 RX: 2.51V 0.001
0.0047 TX: 0.40V C54
0.01
R459 C473 R55
C457 C458
A WFM RX: 3.35V 470 0.01 1K
0.001 L450 0.01
TX: 0V
0.56U R460
A FM RX: 0V
C463
B FM RX: 0V 100K
4P
A RX: 0V
R472
B RX: 0V
2.2K C461 C459 TX: 2.30V
3P
100P
L451
0.56U
RX: 2.89V
Q451
2SC4215 TX: 0.42V
3.34V
R470 R455
D450
C464 470 C465
100
1SS364 R473 0.001 L452 0.01
2.2K 0.47U
C470
C468
4P 2P
R471
220K
C467 C455
L453 C469 12P 0.01 R456
0.47U 8P Q450 68K
C466 2SC4215
Q452 47P
2SC4215
C456
0.01
R457
82K
1.01V R458
1K
FI50
FL-335 R51 C55
150 100P
4 1
GND IN
2 3
OUT GND
C56
4P
C57
18P
R451 R450
15K 390K EP450
D451
MA2S728
1 4 C405
EP400
VCON VCC C451
0.01
0.001
2 3
GND OUT
R452
R454
150K C450 16 1
X450 1K
R OSCI
CR-826 0.1 15 2
P OSCO
14 3
R400 L/F VP
1K 13 4
ZC VCC
12 5
PS DO
11 6
LE GND
10 7
R401 DAT XFIN
9 8
1K R402
CLK FIN
C404 C403
1K
0.001 0.001
IC400
MB15E03SLPFV1
R403
1K
VOLTAGE LINE
TX LINE
RX LINE
COMMON LINE
Q651
XP1501
R651 10K
Q652
2SB1132
3 4
R652 470
2
R650 C652 1 5
1M 0.001
R654 6.8K
RX: 0V
TX: 5.84V
C654
22
R653 C653
10K 0.001
CP1
J703
IFA
LVIFA
DASTB1
BAGC
IOSTB1
VBUAC
UNLK
AR3C
TTEMP
300M800MC
REFC
C3
0.01 APLLSTB
CHG
PLLDATA
R6 T6
2.2K
DATA
MOD
CK
HV
RFR3
MAINR3B +3V
+5.5V
AAGC
VCO3V
C50 C60
68P
68P
RFB
L50
C51
82N
5P C730 C731 B 145 C732
220P 220P 220P
RX: 2.91V
TX: 0V
REF
D351 C61
MA132WK 10P
C302
C300
10 Q300
0.001
R300 UNR9115J
47
R354 VBVCOC
150
C301
R301 0.001
Q301
6.8K
C359 2SC5195 D301
0.001 HVC376B
R355
68K
C305 R304
C308
C306 15P
5P L301 1k
27P 33N
D300
1SV325
R302
Q353
2SC5006 C307 10K
R303 47P
150
B 145
C350
RX: 0.92V Q350
0.001
TX: 0V R350 UNR9115J
47
UBVCOC
B 435 C353 C352 C351
0.001 R351 0.001
RX: 3.02V 0.001
Q351 6.8K
TX: 0V
2SC5195
R356 1k
C358 C355 D350
5P C356 15P D352
HVC375B
12P
HVC375B
R352
C357 10K L351
C416 R353 18P LQW1608A15NG00
270
0.001
R410 B BAND VCO
56
R406 R405
470 5.6K
B 435
RX: 1.05V
TX: 0V
C412
C414 R404 0.1
0.47 820
C411
C401 C400 4.7
0.22
0.001
EP401
C410
0.1
C402
0.22
5.53V
+5.5V
REFC
REFMOD
AFO
J700
R705
EXT SP
0
EP701
EP702
C719
0.001
C708 C707
47P
47P
CLONE
INTSP
EXTMIC
J701
R706
EXT MIC
330
EP704
C710 C709
EP705
47P 47P
C722
47P
R701
100
B
C
A
C720 C721
47P
47P
to RF
unit J1001
CHASSIS
S702
TP76D96
VOL/DIA