Icom IC-M506 Service Manual page 41

• MAIN UNIT (1/2)
R8 R9 C31
47k 1k 1.5P
LDTC144EE
Q2
D1
LDTA144EE RN142G
Q8
R11
R12 C13
470
100k
1
C32
1.5P
R14 R15
100k 100k
3V
RVSHIF
L6 R48
82N
Q9 39
RVSO
LDTC144EE
R46
Tx: 0.0 V
100 Rx CH16: 1.6 V
R161
0
UNLKI
Q32
SCKO
SDATAO
PLSTBO
2SK880
CR-766
X101
C169 R119 C167 C164
RMOD
4.7 47k 120P 30P
R120
10k
LVRX
FCONV
MODV
VOUT7 VOUT6
PCON 19 12
VOUT8 VOUT5
20 11
VIN8 VIN5
21 10
IC19
VIN1 VIN4
22 R2A20178 9
VOUT1 VOUT4
23 8
VOUT2 VOUT3
24 7
25
• VOL UNIT
• SQL UNIT
R1 J1
R1
L3V
1
SQLV
2
GND
3
F09117N
F09117N
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KTA2015
Q11
5V T5V
R51
10k
C49
27P
Q12
Q7
C36
LDTC144EE
C46
1P
Q3
12P
2SC5065 KTC4080
R53 Q13
470
LDTC144EE
C43
Q5
R3V
KTC4080 Q6
Q14
C41 22P
Q4
2SC5065
5P
KTC4080
R34
MP1
2601
39
Q15
LDTC144EE
3V IC102
R58
I
6.8 G
NJM2835DL1
5V
KTC4075
R176
Q71
470
Q70 D53
C185
22P
LDTC114EE RN142G
Q75
KTC4080
Q72
L70 D52
PMBFJ310
Q74
3.9U 1SV305 C181
C188
0.5P
2SC4226 R185 10P
Q76
100
2SC4226
MP3
2601
JTBM450CX70
X202 CR-967
C291
20P
IC201
1 16
OSCIN MIXIN
2 15
OSCOUT GND
3 14
MIXOUT NOISEREC
4 13
V+ NOISEDET
5 12
IFIN RSSI
6 11
DEC IFOUT
7 10
FILOUT QUAD
8 9
FILIN AFOUT
R251
NJM2591V
470k
FI204
LTWC450E1
R233
I O
470
• DIAL UNIT
J1
J1 S1 GND
DIALA
A
L3V
DIALB
1
B
VOLV POW
COM
2
GND
3
TP90N245AE20PY
T5V
IC1
C69 R69
D7 C62 10P 0
RN142G 4P
Q21
2SC4226
IC2
R87
T5VSO 4
Q16
KTA2015 470
KTA2015 LDTC114EE
Q22
Q17 R84
LDTC144EE
8.0 V
Tx: 0.0 V
Rx: 2.0 V
8V R8V
O
C264 L222 L221
0.001
68N 82N
C254
0.01 C245
30.150MHz
0.001
Q205
KTC4080
FL-475 FL-472
FI203 FI202
Tx: 0.0 V
Rx: 2.0 V
C354
Tx: 0.0 V
Rx: 3.3 V
0.01
C345
Q305
KTC4080
0.001 21.7MHz
FI303
FL-451
R231
47
Tx: 0.0 V
Rx: 3.2 V
IC301
1 16
OSCIN MIXIN
CP2 2 15
OSCOUT GND
3 14
MIXOUT NOISEREC
4 13
V+ NOISEDET
5 12
IFIN RSSI
6 11
DEC IFOUT
7 10
FILOUT QUAD
8 9
FILIN AFOUT
LTWC450E1 NJM2591V
R332
FI304
I O 470
• CONNECT UNIT
MPZ1608S101A
1
CMD-VCC
2
3
J2 COMRXD
4
AF/MIC MICG AF/MIC
1 2
GND GND ICF3
3 4
COMRXD ICF3 COMTXD
5 6
COMTXD PTTC MICG
7 8
CMD-VCC CMD-VCC GND
9 10
PTTC
Tx: 5.0 V
Rx: 0.0 V Tx: 1.5 V
Rx: 0.0 V
HV
JDP2S12CR
R75 L20 D14 C103
0.001
180 0.68U
L21
41.0N
L24 C113
35.0N
0.0022
5
3
1
2
NJM2730F R80 D11 R76
1k DB2S31400 100k
R82
LDTC114EE
Q23
47k R83 R78
22 10k 330
Tx: 0.0 V
Tx: 0.0 V
Rx: 7.8 V
Rx: 7.45 V
D202
4 2
3 1
HSMS-2829
2577 FI201
R211 R214 R213
MP5
Q202 120 0 0
PMBFJ310
Q203
PMBFJ310
Tx: 0.0 V
Tx: 0.0 V
Rx: 7.7 V
Rx: 1.61 V
Tx: 0.0 V
Rx: 1.37 V
FI301 HDF160F
C321 C318
0.001 0.001
FI302
FL-450
R323
Q302
1.2k
3SK293
R361 L66 L65
0 47N 0.47U
To AIS UNIT
J5
AIS REG
1 2
3 4
8V
5 6
EP2
J1
1 VCC
7
7 1
2
8
6
6 8 2
3
4
5
5 3
4
*: Refer to the PARTS LIST for the value and name of component.
10-2
L22 L23
35.0N 35.0N
To ANT
Tx: 0.0 V
Rx: 7.3 V
R101
10
Tx: 0.0 V
Rx: 1.2 V
R106
56
C116 C118
Q101
2SC3357
Tx: 0.0 V
18P 24P
Rx: 0.43 V
*L201
HDF160F
C211 L111
0.001 C2012C
R112 L112
C2012C
150
R113 L113
150 C2012C
C311
0.001
TX
RX
Measured by a RF voltmeter
(50 terminated)
RX