Icom IC-M91D Service Manual Addendum

August 2012
8
SECTION 10
.
VOLTAGE DIAGRAM
*: Refer to the PARTS LIST for the value and name of component.
• RF UNIT
RX:1.13V
TX:0.00V
RX:2.69V
TX:0.00V
5W:1.68V
1W:1.12V
RX:0.00V
TX:1.52V
RX:4.35V
TX:0.00V
TX:0.00V
RX:2.58V
3.30V
5.09V
4.96V
4.89V
2.25V
RX:1.83V
TX:0.00V
RX:2.75V
TX:2.70V
RX:2.83V
TX:2.83V
RX:1.32V
TX:0.79V
RX:0.00V
TX:4.75V
1W:0.17V
5W:0.85V
NJM2125F
IC50
1
2
3
4
5
0.001
C79
6P
C72
MPZ1608S221A
EP3
MPZ1608S221A
EP2
RB706F
D91
150
R76
R4
47K
R6
1K
R7
47K
R20
100
R23
1K
R24
100K
R25
100K
R30
68K
R31
680
R33
39K
R34
470
R35
68K
R50
1K
R52
4.7K
R53
100
R55
3.3K
R56
1.2K
R65
150K
R67
100K
R68
100
R70
15K
R71
100
R75
100
R73
1K
R74
10K
R154
100K
R156
470
R170
390
R173
1.5K
R172
470
10K
R381
12K
R383
Q90
3SK294
3SK293
Q150
L92
56N
L93
56N
56N
L96
56N
L97
10
R109
330K
R122
100K
R111 R91
220K
R93
10K
R94
220K
R96
270K
10K
R103
820
R104
220K
R105
220K
R107
R120
2.2K
2.7U
L58
Q23
2SC4215
Q24
2SC4215
Q25
2SC4215
HVC376B
D1
1SV307
D52
CP240
CP10S
CP1
CP10S
Q151
KTC3880S
10K
R12
1K
R11
8.2K
R13
R175
27K
R176
1K
270K
R397
10K
R398
CP300
CP10S
R1 NTCG16
10 F93
C11
R32
470
R27
12K
R155
2.2K
R153
1K
R224
47K
R222
47K
R225
10K
R223
10K
L1
6.8U
R54
10
R72
120
10K
R380
L57
20N
FI150
FL-368
FI151
FL-399A
R83
100K
100
R113
L20
82N
L21
2.7U
L22
82N
L23
0.1U
L24
0.1U
L25
0.1U
0.22 SVA
C24
L82
27.2N
L81
24N
L80
45.3N
L56
6.8N
L55
25N
L90
45.3N
L98
0.82U
Q50
KTC3770U
LTM450FW
FI170
IO
R57
82
1.8K
R110
390K
R115
220
R97
82N
L26
D50
HVD144A
D51
HVD144A
D90
HVD144A
Q20
LDTC144EE
LDTC144EE
Q357
Q221
L2SA1576AS
Q222
L2SA1576AS
NJM2591V
IC170
1
OSCIN
2
OSCOUT
3
MIXOUT
4
V+
5
IFIN
6
DEC
7
FILOUT
8
FILIN
9
AFOUT
10
QUAD
11
IFOUT
12
RSSI
13
NOISEDET
14
NOISEREC
15
GND
16
MIXIN
47P
C171
X170
JTBM450CX70
RD07MUS2B
Q54
R66
47k
33k
R401
68P
C70
27P
C71
HVB350BYPTL
D22
1 2
3 4
L1SS400
D3
DB2S31400
D353
R2
100k
R80
82k
4.7
C182
11P
C131
2P
C97
3P
C100
2.5P
C112
L50
0.1U
82N
L51
NJU7772F33
IC2
1
VIN
2
GND
3
CTRL
4
NC
5
VOUT
LDTC144EE
Q364
LDTC144EE
Q365
LDTC144EE
Q366
R171
3.3k
SSM3J35FS
Q390
0.1
C462
0.1
C463
10k
R541
10
C61
10
C140
10
C224
0.1
C18
R10
560
R22
4.7k
R5
10k
39P
C5
D21
HSC277TRF
D20
HSC277TRF
D92
KDV214EA
D93
KDV214EA
D130
KDV214EA
KDV214EA
D131
0.01
C2
220P
C3
10P
C4
0.001
C6
0.001
C29
0.001
C25
0.001
C44
0.001
C31
0.001
C36
0.001
C38
0.001
C50
0.001
C52
0.001
C62
0.001
C74
0.001
C80
0.1
C13
9P
C21
9P
C22
0.001
C20
0.001
C30
36P
C26
36P
C27
0.001
C15
2P
C8
2P
C9
0.001
C12
0.001
C133
0.001
C170
0.1
C177
0.01
C7
1.5P
C34
220P
C33
0.001
C35
12P
C39
15P
C40
0.001
C41
5P
C42
22P
C43
22P
C51
0.001
C53
0.1
C57
24P
C55
15P
C54
0.001 C69
0.001
C66
0.001
C64
0.001
C60
0.1
C77
0.1
C78
0.1
C58
0.01
C56
0.01
C122
22P
C75
100P
C65
0.01
C63
0.001
C380
0.001
C73
47P
C68
11P
C84
22P
C83
24P
C85
9P C86
470P
C67
18P
C81
18P
C82
2P
C98
22P
C95
9P
C90
10P
C91
27P
C99
0.001
C96
0.001
C111
0.01
C102
47P
C103
0.01
C104
0.001
C109
33P
C110
0.75P
C113
47P
C114
47P
C119
0.022
C120
0.001
C121
0.001
C154
0.001
C156
3P
C155
470P
C59
7P
C89
0.1
C125
0.01
C222
0.01
C223
0.001
C390
0.001
C391
0.022
C157
0.001
C174
0.001
C176
0.1
C181
0.01
C159
0.0056
C160
CR-921
X1
J280
1 2
3 4 5 6 7
8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
37 38
KTC811U
Q224
1 2 3
4 5 6
R226
4.7K
LDTC144EE
Q363
R227
10K
22k
R466
12k
R465
Q225
KTA1664
R228
22K
0.22
C225
R3
10K
GP214D
IC1
1
Fin1
2
Vcc
3
CP1
4
GND
5
LD
6
CLK
7
DATA
8
EN
9
BO
10
OSCO
11
OSCI
12
SW
13
GND
14
CP2
15
Vcc
16
Fin2
LMUN5213DW1
Q391
1
2
3
4
5
6
CP301
CP10S
CP302
CP10S
RD01MUS2
Q53
1
C132
2SK880
Q3
LNJ426W83RA
DS247
1k
R542
1k
R543
SKHHLP014A
S250
SKRPACE010
S251
2775
MP20
1
2
3
4
22N
L53
120P
C19
0.22
C464
R152
820
5.6k
R47
R36
820
470k
R540
R174
270k
10
C466
5P
C94
47P
C101
3P
C116
R95
180k
R121
270k
270P
C179
270P
C180
MMZ1005Y102CT
EP4
MMZ1005Y102CT
EP5
LDTA144EE
Q392
2.2k
R544
OG-363040G
MP23
4.7
C467
RSQ035P03TR
Q353
1 2 3
4 5
6
OG-503040
MP24
6.8k
R382
3.5P
C115
0.0018
C465
0
R545
MPZ1608S221A
EP6
22P
C507
MPZ1608S221A
EP7
0
R546
Q21
KTC3770U
Q22
KTC3770U
0.3P
C37
1.5P
C32
R29*
R26
12K
R28*
2.5P
C117
R69
15K
0
R547
EZJZ0V80010
D354
LNJ426W83RA
DS246
SQL T1CON
LOW
T1CON MODC
TDETV
TXMS
DET
SCKO
SDATAO
PLSTBO
UNLK
LOINV
RSSIV NOIZU
R5V
TEMPV
M5VS T5VS RVS
FCON
LOINV PTTIN FCON F MOD MODC WETIN TDETV DIST NOIZU RSSIV T1CON SQL DET
PTTIN
WETIN
PW
CPU3V
DIST
UNLK SCKO SDATAO PLSTBO
S3V
S3V
MOD
MOD
T5V
T5V
T5V
LOW TXMS T5VS RVS M5VS
LEDV
M5V
M5V
PW
VCC
TEMPV
2nd Lo

Icom IC-M91D Specifications

General

Brand	Icom
Model	IC-M91D
Category	Transceiver
Language	English