Bpf Unit - Icom IC-7800 Service Manual

11-26 BPF UNIT

BPF UNIT (1)
J101
HF OUT-A
to DIGISEL
unit J2
L1 47 +15V
R3 L3
0 3.3
+
- 4.12V
L2 47
L21 47
L24 C31 C35
LR-444 180p 180p
+
-
L22 47
L51 47
L54 C61 C65
4.28V
LR-446 56p 330p
+
-
L52 47
L81 47
L84 C91 C95
4.32V
LR-458 15p 82p
+
-
L82 47
L111 47
L114 C121 C125
4.78V
LR-448 27p 120p
+
-
L112 47
L141 47
L144 C151 C155
5.00V
LR-450 33p 39p
+
-
L142 47
L171 47
L174 C181 C185
4.65V
LR-452 33p 33p
+
-
L172 47
L201 27
L204 C211 C215
5.00V
LR-454 15p 22p
+
-
L202 27
Explanatory notes
4.67V
VOLTAGE LINE
RX LINE
J102
to RXPLL-A 6m OUT-A
unit J1201 +15V
Q900
EP900 EP901
DTA114EU
L905
- + LR-498 -
RL900 RL901
FTR-B4CA012Z FTR-B4CA012Z
R911 C927
100 5p
D900 D901
J601
MA2S111 MA2S111
to DIGISEL
R902 R904
unit J502
Q901
5.6k 15
2SC5551
J602
to RXPLL-B
unit J1201 HF OUT-B
6m OUT-B
+15V +15V
L5 L4 L6
3.3 3.3 3.3
+ +
- -
B0A B0A
+15V +15V
L26
LR-444
+ +
- -
B1A B1A
+15V +15V
L56
LR-446
+ +
- -
B2A B2A
+15V +15V
L86
LR-458
+ +
- -
B3A B3A
+15V +15V
L116
LR-448
+ +
- -
B4A B4A
+15V +15V
L146
LR-450
+ +
- -
B5A B5A
+15V +15V
L176
LR-452
+ +
-
-
B6A B6A
+15V +15V
L206
LR-454
+ +
- -
B7A B7A
VHDWA
+
+15V +15V
-
Q902
EP902 EP903
DTA114EU
L908
+ - + LR-498 - +
+
RL902 RL903
R913 C918
FTR-B4CA012Z FTR-B4CA012Z
1 0.01
R912 C928
100 5p
-
D902 D903
MA2S111 MA2S111
R910
Q903
5.6k
2SC5551
+15V +15V
L231 10 +15V +15V
L234 C241 C245 L236
LR-456 10p 33p LR-456
+
-
L232 10 B8A B8A
L261 6.8 +15V +15V
L264 C271 C275 L266
4.72V
LR-453 22p 22p LR-453
+
-
L262 6.8 B9A B9A
L291 2.2 +15V +15V
L294 C302
4.74V
0.68 15p
+
4.37V
-
L292 2.2 B10A B10A
L321 2.2 +15V +15V
L324 C329
0.22 68p
+
4.74V -
L322 2.2 B10WA B10WA
L501 47 +15V +15V
R503 L504 L506 L505 L507
0 3.3 3.3 3.3 3.3
+
4.24V -
L502 47 B0B B0B
L531 47 +15V +15V
L534 C541 C545 L536
LR-444 180p 180p LR-444
+
-
L532 47 B1B B1B
L561 47 +15V +15V
L564 C571 C575 L566
4.50V
LR-446 56p 330p LR-446
+
-
L562 47 B2B B2B
L591 47 +15V +15V
L594 C601 C605 L596
4.45V
LR-458 15p 82p LR-458
+
-
L592 47 B3B B3B
L621 47 +15V +15V
L624 C631 C635 L626
4.91V
LR-448 27p 120p LR-448
+
-
L622 47 B4B B4B
L651 47 +15V +15V
L654 C661 C665 L656
4.80V
LR-450 33p 39p LR-450
+
-
L652 47 B5B B5B
5.02V
+15V +15V
R351
+15V +15V +15V
150
+ +
- -
HF50A
ATT12A ATT12A
+15V +15V
+ + L373
LR-395
- -
R358
180
ATT3A
L681 47 +15V
L684 C691 C695 L686
LR-452 33p 33p LR-452
+
-
L682 47 B6B
L711 27 +15V
L714 C721 C725 L716
5.03V
LR-454 15p 22p LR-454
+
-
L712 27 B7B
L741 10 +15V
L744 C751 C755 L746
4.67V
LR-456 10p 33p LR-456
+
-
L742 10 B8B
L771 6.8 +15V
L774 C781 C785 L776
4.58V
LR-453 22p 22p LR-453
+
-
L772 6.8 B9B
L801 2.2 +15V
C816 L806
4.50V
15p 0.68
+
- 4.27V
L802 2.2 B10B
L831 2.2 +15V
L834 C839
0.22 68p
MESUREMENT CONDITIONS
voltage at RX
frequency: 14.1 MHz
+
mode: J3E(USB)
ANT(RX): no input
(TX): no modulation
Digital tester
-
4.55V
range: input impedance
200mV: 100M
2V: 11M
L832 2.2 B10WB 20V,200V,1000V: 10M
VHDWB
+15V +15V
Q950
EP950 EP951 EP952
DTA114EU
L951 L954
- + LR-498 - + - + LR-498
RL950 RL951 RL952
FTR-B4CA012Z FTR-B4CA012Z FTR-B4CA012Z
R961 C972 R962
100 5p 100
D950 D951 D952
MA2S111 MA2S111 MA2S111
R952 R954
Q951 Q953
5.6k 15
2SC5551 2SC5551
11 - 25
BUS LINE1
+15V
+15V
R354
47
+
-
+15V
Q355
DTA114EU
DWSPA
a
+
-
b
+15V
+
-
B6B
+15V
+
-
B7B
+15V
+
BPF
UNIT
-
(2)
B8B
+15V
+
-
B9B
+15V
+
-
B10B
+15V
A
+
B
-
B10WB
VHDWB
VPR2B
+15V
Q952
EP953
DTA114EU
- +
RL953
C962 R963
FTR-B4CA012Z
0.01 1
C973
5p
D953
MA2S111
R960
5.6k