Icom IC-M400BB Service Manual page 14

(Additional page)
July 2013
• MAIN UNIT (2/2)
HV
D3
R8 R9 HVB350BYPTL
47k 1k
RX:0V
TX:3.94V
Q2
D1
LDTC144EE
1SS390
LDTA144EE
Q8
R11
LV
R12
470
100k
J1
LV
4 4
SHIFT R14
3 3
MODC
2 2
MOD 100k 100k
1
1
5V
LV
3V
Q9
RVSO
IC101
LDTC144EE
C53
1 Fin1 16
Fin2
2 Vcc 15
Vcc 0.001
3 CP1 14
R116 L1SS400 CP2
4 GND 13
GND
D22
5 LD 12
UNLKI
SW
SCKO 6 CLK 11
OSCI
SDATAO 7 DATA 10
OSCO
PLSTBO 8 EN 9
BO
470 GP214D
CR-921
X101
R120 R119 C166 C164
FCON
10K 47K 30P 56P
NOISEV
X401
R401 C402
4 VCC 3
OUT
1 GND 2
GND 47 0.001
CR-923
RX:5.02V
TX:4.97V
RX:5.02V
TX:4.97V
RX:4.99V
TX:4.89V
RX:2.41V
TX:2.45V
C31
J2
C49
1
1
2P C36 RFLO
2
2
C46 27P 5V
3 3
1P GND
Q3 Q7 4
4
12P PLLLO
2SC4226 KTC4080
C13
C43
Q5
1
KTC4080
C32 C41 22P
Q4
2SC4226
1.5P 5P
R15
Q6
KTC4080
RX:2.89V
TX:2.92V
VCO UNIT
RX:11.99V
3.28V TX:11.64V
3V
VCC
PCON
LMV321IDCK
R238 R236 IC202
100 4.7K 5
1
4
L6
3
82N 2
1 OSCIN
2 OSCOUT
3 MIXOUT
C293 R242
4 V+
5 IFIN
0.001 3.9K
6 DEC
7 FILOUT
8 FILIN
R251
470K
FI204
LTWC450E1
I O
SQL
MAINDET
R3V
R417 EP401
10 MMZ1005S601CT
C411 C414 C417 C424
0.75P 0.75P 0.001
7P
Q401 Q402
3SK294 3SK293
KTA2015
T5V
Q10
T5V RX:0V IC1
TX:4.84V
R51
10K
C83 R70
D7 R63 C72 10P 0
RN142G 0 4P
Q13
2SC4226
Q11
LDTC144EE
RN142G
R53
D8
470
Q12
LDTC144EE
T5VSO
3V
RX:3.27V R88 R87
R3V
TX:0V
0 470
VCC
KTA2015
Q23
R8V LDTC114EE
Q14
Q22
LDTC144EE
Q24
KTC4075
R229
2.2K
RX:8.17V
RX:3.15V TX:0V
TX:0V
JTBM450CX70
IC201
16
MIXIN
15
GND
14
NOISEREC
13
NOISEDET
C254
12
RSSI
11
IFOUT 0.01
10 RX:1.34V FI203
QUAD
9
TX:0V FL-451
AFOUT
C245 R224
NJM2591V
0.001
CP2 1.5K
Q203
KTC4080
R232 CP15S
470
RX:3.15V
TX:0V
X302 CR-922
C371
18P
IC301
1 OSCIN 16
MIXIN
2 OSCOUT 15
GND
3 MIXOUT 14
NOISEREC C344
4 V+ 13
NOISEDET
5 IFIN 12
RSSI 0.01
6 DEC 11
IFOUT
7 FILOUT 10
QUAD
8 FILIN 9
AFOUT
KTC4080
FI304 NJM2591V
R323 CP4
LTWC450E1 CH70DET
I O 470
CP15S
RX:1.46V
TX:0V
RX:12.00V
TX:11.54V
HV
R75 L19 D14 C113
0.001
68 0.68U RN752
L20
41.0N
L23
35.0N
IC2
5
3
4
1
2
NJM2730F R80 D11 R76
100K
1K HSU88
R82
LDTC114EE
Q15
R84 47K R83 R78
PCON
22 10K 330
C264 L207 L206
0.001 68N 0.1U
R8V
RX:6.82V
RX:8.09V TX:0V
TX:0V
FI201
HDF160F
C222 C221
Q202
FI202
0.001
3P
FL-450
R223
C237
3SK293
0.001
1.2K
R8V
L306 L305
56N 56N
RX:8.02V
TX:0V
FI303 FI302
FL-453 FL-452
R312
C336 R311 C331
Q303
0.001 680 680 0.001 Q302
3SK293
*: Refer to the PARTS LIST for the value and name of component.
13
L21 L22 CP15
35.0N 35.0N CP15S
to ANT
CP16
CP15S
C127 R99
0.001 12
R261
0
R262
0
R263
0
R264
0
C211
7P
Q201
C203 C202
C213
3P 9P
3SK294
3P
C311 C308 C305 C304 C301
0.001 1P 0.75P 0.75P 1.5P