Bpf-A, Preamp Boards And Rf-B Unit - Icom IC-756PROIII Service Manual

10-7 BPF-A, PREAMP BOARDS AND RF-B UNIT

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
2 5 2SC4081
R103 R105
2.2k 0
1 6
L101 L102
J102 0.12µ 82n
C106
XVRT
C102 C104
0.1
15p 75p
RANT
C151 C154
0.1 0.1
R156
330
L151
330µ
Q151
UMH11N
1 6
2 5
3 4
R151 10k
IC201
R202 L202 C205 µPC1678GV
J201
10 0.12µ 0.1
PAI 5
from PA
OUT
unit J1
6
GND
C203
7
12p GND
8
VCC
Q202
UMH11N
1
2
R205
1k
Q201
3
2SA1576
MEASUREMENT CONDITIONS
: 50K Ω / VDC
VOLTMETER
: 20MHz 1M Ω 25pF
OSCILLOSCOPE
DISPLAY : 14.1 MHz USB
R451 1
J451
R452 1
14V
14V
AGC
8V
ALC
T8V
NC
NC
R8V
-5V
NC
to MAIN-A
unit J811
5V
TRVI
NC
SATV
BLBV
BLAV
SCPL
GND
MDAT
MCK
BSTB
RL102 RL103
ATN203 ATN203
+ - + -
ATT2
ATT1
RANS
L103
C110
68n
0.1
D101
L104
MA742 R107
330µ
330
E3_5
R109
10k
R108 R8V
C108 2p 100k
Q102
UMH11N
1 6
2 5 TRVI
3 4
D152
1SV307
L251 L252
330µ
330µ
Q152
UNR9211J
C274
0.0015
C272
R8V
0.0033
C273 L271 L253
0.0033 4.7µ 5.6µ
14VL_WEST
TRVI TRVI
8VL
C208 R210 D201
0.1 15 1SV307
4
GND
3
GND
2
GND
1
Q1901
IN
XP4311
4 3 R14V
5 2
6
6 1
5
4
14VL_WEST
Q203
UNR9211J TRVI
R208 10k
L456
2.7µ
EP463
EP464 14VL_WEST
EP465
EP466 14VL_EAST
EP467
EP451 AGC
EP468 8VL
EP452 ALC
EP469 T8V
EP470
EP471
EP472 R8V
EP453 -5V
EP473 5VL
EP462 TRVI
EP454 SATV
EP455 BLBV
EP456 BLAV
EP457 SCPL
EP458 MDAT
EP459 MCK
EP460 BSTB
10 - 17
E1_8
D301 DAN222
IC301
TD62783AF
E1_6
E1_7 1 18 R301 10
I1 O1
2 17 R302 10
I2 O2
E1_5 3 16 R303 10
I3 O3
E1_4 4 15 R304 10
I4 O4
E1_3 5 14 R305 10
I5 O5
E1_2 6 13 R306 10
I6 O6
E1_1 7 12 R307 10
I7 O7
8 11
I8 O8
9 10
VCC GND
C301 0.1
ATT OFF, 6dB: 0V
IC302
ATT12, 18dB: 9.8V
TD62783AF
E3_2 1 18
ATT OFF, 6dB: 9.9V
I1 O1
E3_1 2 17 ATT12, 18dB: 0V
I2 O2
TXB10 3 16 R315 10
I3 O3
B10 4 15 R316 10
I4 O4
E2_6 5 14 R317 10
I5 O5
E2_5 6 13 R318 10
I6 O6
D303 7 12 R319 10
I7 O7
DAN222 8 11 R326 10
I8 O8
E2_3 9 10
VCC GND
E2_4
C302 0.1
D302
DAN222
E2_1
E2_2
14VL_WEST
T8V
5VL
Q356 Q357 Q352
XP4311 XP4311 UMH11N
D353
4 3 4 3 4
DAP222
E2_7
5 2 5 2 5
6 1 6 1 6
D354
DAP222
TXB10 D352
B10 DAN222
E3_3 R351 4.7k
E3_4 R352 4.7k
Q351
UMH11N
D351
4 3
DAN222
E1_1
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
6 1 6 1 6 1
14VL_WEST
C401 0.1 C402 0.1
IC401 IC402
CD4094BPWR CD4094BPWR
1 16 1 16 1
STR V+ STR V+
2 15 2 15 2
D OE D OE
3 14 E1_5 3 14 E2_5 3
CLK Q5 CLK Q5
E1_1 4 13 E1_6 E2_1 4 13 E2_6 E3_1 4
Q1 Q6 Q1 Q6
E1_2 5 12 E1_7 E2_2 5 12 E2_7 E3_2 5
Q2 Q7 Q2 Q7
E1_3 6 11 E1_8 E2_3 6 11 E3_3 6
Q3 Q8 Q3 Q8
E1_4 7 10 E2_4 7 10 E3_4 7
Q4 Q'S Q4 Q'S
8 9 8 9 8
GND QS GND QS
T8V
R14V
14VL_2LOAMP
14VL_WEST
14VL_EAST
AGC
R8V
ALC
8VL
5VL
BLBV
BLAV
D801
Selected: 10.8V
1SV307
B6 B0
B5
C9001 C9012 C9021
B4
0.0047 0.0047 0.0047
B3
B2
C9002 C9015 C9024
B1
0.0047 0.0047 0.0047
B0
C9007 C9016 C9026
0.0047
0.0047 0.0047
C9008 C9018 C9027
0.0047
0.0047 0.0047
C9011 C9020
TXB10 0.0047 0.0047
B10 B6
B10W
B9
R360
Display frequency(MHz) Filter
B8 0
0.003000 1.599999 B0
B7
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
22.000000 29.999999 B9
30.000000 49.999999 B10W
B7
50.000000 54.000000 B10
B10W
54.000001 60.000000
50.000000 54.000000 TXB10
R357
10k
3
2
1
Explanatory notes
VOLTAGE LINE
TX LINE B8
RX LINE
COMMON LINE
B9
POFF
PRE2
PRE1
PREAMP1 ON: 11.2V
Other: 0V
B10W
MCK
MDAT
BSTB
C403 0.1 L401
100µ
IC403
CD4094BPWR
16
STR V+
15
D OE
14 E3_5
CLK Q5
13
Q1 Q6
12
Q2 Q7
11
Q3 Q8
10 B10
Q4 Q'S
9 TXB10
GND QS
A
B
R802 C801 L801 L802
D802
68 0.1 4.7µ 4.7µ
1SV307
B0
C807
0.03-1.6
560p
C
D501 L502 C506 D502
1SV307 1.8µ 33p 1SV307
C510 L505
C507
33p 1.8µ
B6
33p
8-11
C511
33p
R501 100
D551 L552 C556 C560 L555 D552
1SV307
1.5µ 22p 22p 1.5µ 1SV307
C557 C561
B7
15p 15p
11-15
R551 100
D
D602 C606 D603
L602 C610 L605
1SV307 0.82µ 33p 0.82µ 1SV307 E
33p
C607 C611
B8
10p 10p
15-22
R601 100
D651 L652 C656 C660 L655 D652
1SV307 0.68µ 22p 22p 0.68µ 1SV307
B9
22-30
R651 100
D701 L702 C704 D702
1SV307
0.22µ 68p 1SV307
B10W
30-50
54-60
C702
0.1
R701 100
F
D751 R752 C756 C760 D752
R753
1SV307 0 47p 47p 0 1SV307
C757
B10
8p
50-54
R751 100
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