Icom IC-756proIII Service Manual page 102

14VL_WEST
RL101
ATN203
D103
DAN222
+ -
J101
from CTRL-A RX
unit J2
C117 0.0047
Q101
UNR9211J
Q104
XP4311
3 4 14VL_WEST
Q103
2SC4081
2 5 D101
R103 R105
MA742
2.2k 0
1 6
C108 2p
L101 L102
J102 0.12µ
82n
C106
XVRT C102 C104
0.1
15p 75p
RANT
D152
1SV307
C151 C154
0.1 0.1
R156
330
L151
330µ
Q152
UNR9211J
Q151
UMH11N
1 6
2 5
3 4
R151 10k
IC201
L202 C205 µPC1678GV
J201 R202
10 0.12µ 0.1
from PA PAI 5
OUT GND
unit J1 6
GND GND
C203
7
GND GND
12p
8
VCC IN
Q202
UMH11N
1 6
2 5
R205
1k
Q201 3 4
2SA1576
MEASUREMENT CONDITIONS
: 50K Ω / VDC
VOLTMETER
: 20MHz 1M Ω 25pF
OSCILLOSCOPE
DISPLAY : 14.1 MHz USB
EP463
R451 1
EP464
J451 EP465
R452 1
14V EP466
14V EP467
AGC EP451
8V EP468
ALC EP452
T8V EP469
NC EP470
NC EP471
R8V EP472
-5V EP453
to MAIN-A NC
unit J811 5V EP473
TRVI EP462
NC
SATV EP454
BLBV EP455
BLAV EP456
SCPL EP457
GND
MDAT EP458
MCK EP459
BSTB EP460
10 - 17
E1_8
D301 DAN222
RL102 RL103
E1_6
ATN203 ATN203
E1_7
+ - + -
E1_5
E1_4
E1_3
E1_2
E1_1
ATT2
ATT1
RANS
L103
C110
68n 0.1
E3_2
E3_1
L104 R107
TXB10
330µ
330
B10
E2_6
E3_5 E2_5
R109
10k
R108
R8V
100k
E2_3
E2_4
Q102
UMH11N
1 6 E2_1
E2_2
2 5 TRVI
14VL_WEST
3 4
L251 L252
330µ 330µ
E2_7
C274
0.0015
C272
R8V
0.0033
TXB10
L271 L253
C273
0.0033 4.7µ 5.6µ B10
E3_3
14VL_WEST
E3_4
TRVI TRVI
8VL
C208 R210 D201
0.1 15 1SV307
4
3 E1_1
2
1
Q1901
XP4311
4 3 R14V
5 2
6 1
Q203 14VL_WEST
UNR9211J TRVI
R208 10k
14VL_WEST
L456
2.7µ
14VL_WEST
14VL_EAST
AGC
8VL
ALC
T8V E1_1
E1_2
E1_3
R8V E1_4
-5V
5VL
TRVI
SATV
BLBV
BLAV
SCPL
MDAT
MCK
BSTB
D801
Selected: 10.8V
IC301
1SV307
TD62783AF
1 18 R301 10 B6
I1 O1
2 17 R302 10 B5
I2 O2
3 16 R303 10 B4
I3 O3
4 15 R304 10 B3
I4 O4
5 14 R305 10 B2
I5 O5
6 13 R306 10 B1
I6 O6
7 12 R307 10 B0
I7 O7
8 11
I8 O8
9 10
VCC GND
C301 0.1
ATT OFF, 6dB: 0V
IC302
ATT12, 18dB: 9.8V
TD62783AF
1 18 ATT OFF, 6dB: 9.9V
I1 O1
ATT12, 18dB: 0V
2 17
I2 O2
3 16 R315 10 TXB10
I3 O3
4 15 R316 10 B10
I4 O4
5 14 R317 10 B10W
I5 O5
6 13 R318 10 B9
I6 O6
7 12 R319 10 B8
D303
I7 O7
DAN222
8 11 R326 10 B7
I8 O8
9 10
VCC GND
C302 0.1
D302
DAN222
T8V
5VL
Q356 Q357 Q352
XP4311 XP4311 UMH11N
D353
4 3 4 3 4 3
DAP222
5 2 5 2 5 2
6 1 6 1 6 1
D354
DAP222
D352
DAN222
R351 4.7k
R352 4.7k
Q351
UMH11N
D351
4 3
DAN222
5 2
6 1
PREAMP2 ON: 11.2V
Other: 0V
Q353 Q354 Q355
XP4311 XP4311 XP4311
4 3 4 3 4 3
5 2 5 2 5 2
PREAMP1 ON: 11.2V
6 1 6 1 6 1
C401 0.1 C402 0.1 C403 0.1
IC401 IC402 IC403
CD4094BPWR CD4094BPWR CD4094BPWR
1 16 1 16 1
STR V+ STR V+ STR V+
2 15 2 15 2
D OE D OE D OE
3 14 E1_5 3 14 E2_5 3
CLK Q5 CLK Q5 CLK Q5
4 13 E1_6 E2_1 4 13 E2_6 E3_1 4
Q1 Q6 Q1 Q6 Q1 Q6
5 12 E1_7 E2_2 5 12 E2_7 E3_2 5
Q2 Q7 Q2 Q7 Q2 Q7
6 11 E1_8 E2_3 6 11 E3_3 6
Q3 Q8 Q3 Q8 Q3 Q8
7 10 E2_4 7 10 E3_4 7
Q4 Q'S Q4 Q'S Q4 Q'S
8 9 8 9 8
GND QS GND QS GND QS
T8V
R14V
14VL_2LOAMP
14VL_WEST
14VL_EAST
AGC
R8V
ALC
8VL
5VL
BLBV
BLAV
R802 C801
68 0.1
B0
C9001 C9012
C9021
0.0047 0.0047 0.0047
C9002 C9015 C9024
0.0047
0.0047 0.0047
D501
L502
1SV307 1.8µ
C9007
C9016 C9026
0.0047 0.0047 0.0047
C9008 C9018 C9027
0.0047 0.0047 0.0047
C9011 C9020
0.0047 0.0047
R501 100
B6
D551
L552
R360
1SV307 1.5µ
Display frequency(MHz) Filter
0
0.003000 1.599999 B0
1.600000 1.999999 B1
R361
2.000000 2.999999 B2
0
3.000000 3.999999 B3
4.000000 5.999999 B4
R362
6.000000 7.999999 B5
0
8.000000 10.999999 B6
11.000000 14.999999 B7
15.000000 21.999999 B8
B9
22.000000 29.999999
30.000000 49.999999 B10W
R551 100
B7
50.000000 54.000000 B10
B10W
54.000001 60.000000
D602 L602
50.000000 54.000000 TXB10
1SV307 0.82µ
R357
10k
Explanatory notes
VOLTAGE LINE
R601 100
TX LINE B8
D651 L652
RX LINE
1SV307
0.68µ
COMMON LINE
R651 100
B9
POFF
D701 L702
PRE2 1SV307
0.22µ
PRE1
C702
0.1
Other: 0V
R701 100
B10W
MCK
MDAT
D751
R752
BSTB
1SV307
0
L401
100µ
16
15
14 E3_5
13
12
11
R751 100
10 B10
9 TXB10
A
B
L802
L801 D802
4.7µ 4.7µ
1SV307
B0
C807
0.03-1.6
560p
C
C506 D502
33p
1SV307
C510 L505
C507
1.8µ
33p
B6
33p
8-11
C511
33p
C556 D552
C560 L555
22p 22p 1.5µ 1SV307
C557 C561
B7
15p 15p
11-15
D
C606 C610 L605 D603
33p 33p 0.82µ 1SV307 E
C607 C611
B8
10p 10p
15-22
C656 C660 L655 D652
22p 22p 0.68µ 1SV307
B9
22-30
C704 D702
1SV307
68p
B10W
30-50
54-60
F
C756 C760 R753 D752
47p 1SV307
47p 0
C757
B10
8p
50-54
G
H
I
J
K
T8V
L
R14V
M
14VL_2LOAMP
N
14VL_WEST
O
14VL_EAST
P
AGC
Q
R8V
R
ALC
S
8VL
T
5VL
U
BLBV
V
BLAV
W
X
RF-B UNIT
Y