Network Board - Icom IC-7800 Service Manual

BPF UNIT (2)
BUS LINE1
+15V
BPOE
VHDWA R907 100 VHDWIA
VPR2A R906 100 VPR2IA
B0A R101 100 BI0A
B1A R102 100 BI1A
B2A R103 100 BI2A IC101 IC102
BU2099FV BU2099FV
B3A R104 100 BI3A
B4A R105 100 BI4A 1 20 1
VSS VDD VSS
B5A R106 100 BI5A 2 19 2
NC OE NC
3 18
B6A R107 100 BI6A BPDAT 3
DATA SO DATA
B7A R108 100 BI7A BPCKA 4 17 BI10WA BPCKA 4
CLOCK Q11 CLOCK
B8A R117 100 BI8A BPSTA 5 16 BI10A BPSTA 5
LCK Q10 LCK
B9A R118 100 BI9A BI0A 6 15 BI9A HF50IA 6
Q0 Q9 Q0
B10A R119 100 BI10A BI1A 7 14 BI8A AT12IA 7
Q1 Q8 Q1
B10WA R120 100 BI10WA BI2A 8 13 BI7A AT6IA 8
Q2 Q7 Q2
HF50A R121 100 HF50IA BI3A 9 12 BI6A AT3IA 9
Q3 Q6 Q3
ATT12A R122 100 AT12IA BI4A 10 11 BI5A 10
Q4 Q5 Q4
ATT6A R123 100 AT6IA
ATT3A R124 100 AT3IA
+15V +15V
BPOE
VHDWB R957 100 VHDWIB
VPR2B R956 100 VPR2IB
B0B R451 100 BI0B
B1B R452 100 BI1B
B2B R453 100 BI2B
IC401 IC402
BU2099FV BU2099FV
B3B R454 100 BI3B
B4B R455 100 BI4B 1 20 1
VSS VDD VSS
B5B R456 100 BI5B 2 19 2
NC OE NC
B6B R457 100 BI6B BPDAT 3 18 3
DATA SO DATA
B7B R458 100 BI7B BPCKA 4 17 BI10WB BPCKA 4
CLOCK Q11 CLOCK
B8B R467 100 BI8B BPSTB 5 16 BI10B BPSTB 5
LCK Q10 LCK
B9B R468 100 BI9B BI0B 6 15 BI9B HF50IB 6
Q0 Q9 Q0
B10B R469 100 BI10B BI1B 7 14 BI8B AT12IB 7
Q1 Q8 Q1
B10WB R470 100 BI10WB BI2B 8 13 BI7B AT6IB 8
Q2 Q7 Q2
HF50B R471 100 HF50IB BI3B 9 12 BI6B AT3IB 9
Q3 Q6 Q3
ATT12B R472 100 AT12IB BI4B 10 11 BI5B 10
Q4 Q5 Q4
ATT6B R473 100 AT6IB
ATT3B R474 100 AT3IB
+15V
T8V
MR8V
L395
330
+15V
a
display of TX frequency (MHz) port
0.030000 1.599999 B0
1.600000 1.999999 B1
2.000000 2.999999 B2
3.000000 3.999999 B3
4.000000 5.999999 B4
R382
6.000000 7.999999 B5 220
8.000000 10.999999 B6
11.000000 14.999999 B7
Q381
15.000000 21.999999 B8
DTC114EU
22.000000 29.999999 B9
30.000000 60.000000 B10
Q387
ATT AT3A AT6 AT12
DTC114EU
OFF L L L MR8V
BPF 3dB H L L
Q384
6dB L H L DTC114EU
UNIT
9dB H H L T8V T8V
(1)
12dB L L H
15dB H L H
18dB L H H
21dB H H H
L: 2.0V H: 15.0V
+15V
T8V T8V
RMUTA RMUTA
C881
1
+15V +15V
R871 C876
220 0.0047
RMUTB
Q874
DTC144EU Q871
DTA114EU
Q872 D872
2SC4081 MA742
R874 R873
0 2.2k
Q873
2SC4116
+15V +15V
A
B
+
-
DWSPB
+15V +15V
R857
22
+
-
ATT3B ATT3B
b
RSELA
11 - 26
3.25V
J1
GND
BPCKA R141 220 BPCKA
BPSTA R142 220 BPSTA
BPDAT R143 220 BPDAT
R441 220
BPOE BPOE
BPSTB R442 220 BPSTB
to LOGIC
NC
unit J812
20 +15V L902 HF50ACC322513 +15V
VDD
19 L901 HF50ACC322513 +3R3V
OE
18 T8V L903 10 T8V
SO
17 VHDWIA L904 10 MR8V
Q11
16 VPR2IA GND
Q10
15
Q9 R134 100
14 RSELA
Q8
13 TRVS MESUREMENT CONDITIONS
Q7
voltage at RX
12 RMUTA
Q6 frequency: 14.1 MHz
11 DWSPA mode: J3E(USB)
Q5
ANT(RX): no input
(TX): no modulation
Digital tester
+15V +15V
range: input impedance
200mV: 100M
14.9V
2V: 11M
20V,200V,1000V: 10M
BPOE
Explanatory notes
VOLTAGE LINE
20
VDD
19 RX LINE
OE
18
SO
17 VHDWIB
Q11
16 VPR2IB
Q10
R475
15
Q9
100
14
Q8
13
Q7
12 RMUTB
Q6
11 DWSPB
Q5
+15V
T8V
MR8V
L394
C393 C395
J107
330
0.015 0.015
TRV-TX to MAIN
unit J802
J103
X-
VERTER
C388
0.0047
RX_ANT
J505 OUTB(BNC)
Q383
DTC114EU
-
J506
+
Q386 Q385 from ANT-SW
R395
DTC144EU DTC114EU unit J2
680
RX-B
R396
680
CP506
CP507
T8V
RMUTA
RX_ANT
C402
J104 INA(BNC)
1
R401 C401
220 0.0047
Q404
DTC144EU Q403
DTA114EU
Q402 D402
2SC4081 MA742
R404 R403
0 2.2k
Q401
2SC4116
RX_ANT
INB(BNC)
J504
+15V
R851 R854
150 47
+ +
- -
ATT6B ATT6B
CP107
Q855
DTA114EU
CP106
RX_ANT
OUTA(BNC)
J105
+15V
J108
RX-ONLY from ANT-SW
unit J3
+ +
- -
J106
RX-ANT
from CTRL
board J351
b
RSELA

11-27 NETWORK BOARD

NETWORK BOARD
Explanatory notes
RL10
VS-12MBU
CI3
RL11
VS-12MBU
CO3
L90 L80
LA-493 LA-492
RL80
VS-12MBU
14T 18T
L100
LA-494
RL90
VS-12MBU
10T 7T
7.5V
7.5V
Q300 R303 L300
J4
2SB1123 120
TFAN
to
FAN
GND
6.7V
4.5V
MESUREMENT CONDITIONS
Q301
voltage at RX
DTC114EU
frequency: 14.1 MHz
mode: J3E(USB)
(TX): no modulation
TUNER ON
Digital tester
range: input impedance
RL40
VS-12MBU
VOLTAGE LINE
TUIN
TX LINE
VHCI
RL20 RL30
VS-12MBU VS-12MBU
CP1
CI2 CI1
CP3
RL21 RL31
VS-12MBU VS-12MBU
CP4
CO2 CO1
CP2
RL41
VS-12MBU
TUOT
VHCO
L70 L60 L50
LA-492 LA-593 LA-598
RL70 RL60 RL50
VS-12MBU VS-12MBU FTR-F1
VHFT
24T
VHFT VHFT
L110 L120 L130
LA-594 LR-504 LR-505
RL100 RL110 RL120
VS-12MBU VS-12MBU VS-12MBU
5T 35T
35T 35T
35T
5T
7T
10T
14T
18T
24T
VHFT
CO3
CO2
CO1
VHCO
VHCI
CI3
CI2
CI1
+15V +15V
FANC FANC
J2
TUIN from/to CTRL
board J251
J3
TUOT
from/to CTRL
board J252
J1
GND
GND
3R5M
5M
7M
10M
14M
18M
24M
VHF
GND
FANC
to CTRL
+15V
board J51
+15V
CO3
CO2
CO1
VHC0
VHCI NVHF
CI3
CI2
CI1
GND
GND