Main Unit - Icom IC-F70DT Service Manual

11-2 MAIN UNIT

MAIN UNIT
S5V
5V
C7 47p
R5 560k
R2
270k
REF 6
- 7
BAL 5
+
R1
IC2
10k
NJM12902V
1.4V
155MHz
TEMP
LVIN
5V
L46
1.8µ
R4
1k
PLST
SSO
SCK
UNLK
5V
C326
1.0V 0.1
IC2
NJM12902V
R311 12
3 14
+
470
CDEC 1 + 13
2 -
-
IC2
R314 470k
NJM12902V
C319 470p
R315 C321
100k 4.7
R304 56k C315 1
TONE
R334 C344
R305 100k C316 1
MICA
560k 4.7
R306 220k C317 1
SIG
5V
4
V+
GND
11
5.0V
IC12
NJM12902V
R333
100k
4
V+
GND
11
IC2
NJM12902V
R308 18k EP300
5V R300 82k
R301 47k
MTCK
MTDT
MDIO
MRDF
MSCK
MDIR
SDEC
AFOUT
5V
S5V
S5V
5V
X1
L1
CR-796
8.2µ
4 3
Q2
VCC OUT
1 2 CP3 2SK880
VCON GND
R12
IC1 4.7k
R17 4.7k
LMX2352TM
24 1
OUT1 CUTO
23 2
VCCIF VCCRF C217 0.001
22 3
VPIF VPRF
21 4
CPOIF CPORF
L57 L56 C20
20 5
GND GND LLQ1608-A22N LLQ1608-A22N 4p
19 6
FINIF FINRF
18 7 C13 0.001
FINRF FINRF
17 8
GND GND
16 9
LE OSCX C14 0.001
15 10
DATA OSCIN
14 11
CLOCK FO/LD C9 0.001
13 12
Q1
IF_EN RF_EN
DTC144EE
5V
R322 R329
22k 22k
R401
4.7
R320
22k
IC303
R342
M62364FP
R390 18k
680
1 24
VIN1 VIN8
2 23
VOUT1 VOUT8
3 22
VOUT2 VOUT7
4 21
VIN2 VIN7
5 20
C351
VDD GND
6 19
IC12 0.1
LD RESET
NJM12902V
7 18
CLK VDAREF
2 8 17
- 1 DI D0
C387
3 9 16
+ VIN3 VIN6
0.1
10 15
R336
VOUT3 VOUT6
11 14
100k
VOUT4 VOUT5
2.0V
R352
12 13
VIN4 VIN5
R323 C324
2.0V
5.6k 1
R508
9 47
- 8
10
+
IC2
NJM12902V
R324 22k C339 0.1
IC301
AK2346
C318 1
1 24
AGNDIN TEST C323 82p R325 220k
2 23
AGND RXIN
3 22
TXIN RXINO
4 21
TXINO RXLPFO R319 1M
5 20
LIMLV RXAF
6 19
EXTLMIN RXAFIN
7 18
R507
MOD EXPOUT
470k
8 17
VSS VDD R331 100
R326
9 16
TCLK XIN
100k
10 15
TDATA XOUT
11 14
DI/O DIR R356 1M
12 13
RDF/FC SCLK
X301 CP2
CR-799
DIGTAL,COMP ON: 5V
R309 1k
C308 0.1 R302 3.3k
R312 390k CP16 CP1 R318 10k
R316 C327
33k 0.1
R313 12k
5V
S5V
S5V
5V
Q3
2SC4116
R22
100
R25
560
L43 3.3µ
0.6V
155MHz
R131
100
C27 3p
L48 3.3µ
R129
220k
R14
4.7k
R15
4.7k
L3
3.3µ
IC6
TC4S66F
1.8V
155MHz
R130
220k
TLVA
R5V
5V 5V
SP+
BEPO
D13
DAN235E
C117
4p
C353
Q14
0.1 2SC4215
R351
3.9k
Explanatory notes
33k
VOLTAGE LINE R64 22
TX LINE
RX LINE
WIDE: 0.1V
NARROW: 4.6V
R355
270k
5V
R330 47k
IC313 IC300
TC4W53FU LC73872M
C311 0.1
1 8 1 14
INPUT VDD
2 13
2 7 NC NC
3 12
PO EST
3 6 4 11
OSCO STD
5 10
4 5 OSCI ACK
6 9
NC SD
7 8
VSS LOAD
X300
COMP OFF: 0.5V
CR-800
R303
1M
R337
ERJ2GE-JPW
R26 3.9k R30 1.8k
C45 L9 C54 R27
47p 80.2n 33p ERJ2GE-JPW
Q4
2SC4226
L4
3.3µ
R132 3.9k R133 1.8k
C223 L51 C226 R134
47p 90.5n 33p
ERJ2GE-JPW
C231
0.75p
Q20
2SC4226
L47
3.3µ
R135
470
R28 3.9k R31 1.8k
R90 120k
L10 C55 R29
82n 68p 4.7
C46
L44 Q5
220p
3.3µ
2SC4226
C213
0.001
C214
L6 68n 0.1
C129 3p
R72
47
C133 0.1
IC3
TA31136FN
FI1
C127 C130
0.1 CFWC450F 0.1 1
OSCIN MIXIN
I O 2
D14 OSCOUT GND
3
DAN235E MIXOUT N-REC
4
C135 0.1 VCC N-DET
5
IFIN RSSI
R67
6
DEC IFOUT
4.7k
7
FILOUT QUAD
8
FILIN AFOUT
R74
FI2 220k
C128 C131
CFWC450G
0.1 0.1
R77
I O
82k
Q15
DTA144EE
Q16
DTC144EE
5V
R360
IC302
18k
BU4053BCFV
1 16 Q300
Y1 VDD
C365 DTC144EE
2 15
Y0 Y
0.1
3 14
Z1 X
4 13
Z X1
5 12
Z0 X0
6 11
INH A IC12
7 10
VEE B NJM12902V
R351
8 9
VSS C 4.7k 10
8 +
9
-
0.8V
C361 0.0082
IC12
IC12
R362 R363 NJM12902V
NJM12902V
68k 68k
5
7 +
6
-
5V
S5V
11 - 2
A
B
EP2
C
Q6
Q21 2SC5107
XP1214
D
4 3
R5V
E
0V 2 Q8
155MHz DTC144EE
5 1
2.8V
155MHz
R136
10k
Q7 F
XP1214
R32 R36
560 10k
4 3
2
R37
1k
TX: 0V
5 1
RX: 2.5V
R5V
5V
G
H
16
15
C145
14
0.01
13
C146
12
100p
11
10
9
C382 0.1
R378
4.7k
Q303
2SC4215
R382 3.3k
DUSE
R372 R374
47k 180k
CENC0
R375
56k
CENC1
R376
22k
CENC2
R364 R366 R368 R377
47k 47k 47k 1k
C372 0.0056
R365 R367 R371
68k 68k 68k
12 SENC
14 +
13
-
I
J
R5V
K
5V
L
S5V
M
N