Icom IC-7800 - Page 332

Jul. 2008
83
DC-DC UNIT
VOLTAGE LINE
Explanatory notes
C15V
C15V
LG_PWR
LM2594M
IC121
1
2
3
4
5
6
7
8
RB081L
D123
47
C123
47k
R122
1SR154
D121
47k
R121
LM2673S
IC21
1 2 3 4 5 6 7
47
C26
0.047
C25
RB081L
D21
8.2kR21
0.01C24
470p
C23
0.1C21
HF50ACC322513
L21
D10F-A814AY
L103
HF50ACC322513
L101
0.01
C104
0.047C105
0.1C101
470pC103
8.2kR103
RB081L
D101
LM2673S
IC101
1 2 3 4 5 6 7
270
R101
100
C46
0.01C44
0.047
C45
0.1C41
470pC43
8.2kR41
RB081L
D41
LM2673S
IC41
1 2 3 4 5 6 7
0.1C65
HF50ACC322513
L61
D10F-A814AY
L122
33
R141
L141
CDRH104R L142
0.1
C141
0.1C61
LM2673S
IC61
1 2 3 4
5 6 7
8.2kR61
RB081L
D61
0.01
C64
470pC63
47C66
47C106
470pC83
LM2673S
IC81
1 2 3 4 5 6 7
0.01
C84
47C86
8.2kR81
HF50ACC322513
L81
0.1C81
0.1C85
D81
RB081L
1kR102
DAN222
D141
DTD113ZK
Q141
J3
J4
to LOGIC
unit J820
to LOGIC
unit J821
to MAIN
unit J450
to PA 200W
unit J450
J2
150C102
150C22
150C42
150C62
150C82
100C9
J5
AW3023
RL142
W1
to
REG unit
0.1
C122
150C27
150C47
150C67
150C87
150C107
BLM31PG121SN1
L41
BLM31PG121SN1
L44
L22
L23
L42
L43
L102
L83
L82
CDRH104R
L62
CDRH104R
L63
L121
MBRD835LT4
D122
0.0047
C124
VDD1R5
VDD1R5
PWRS
PWRS
C15VC15V
C15V
C15V
GND
GND
GND
GND
GND
C15V
VDD3R3
VDD3R3
+5V_
+5V
+5V
VDD5
VDD5VDD5
VDD5
GND
GND
GND
GND
GND
LG_PWR
DC-DC UNIT
GND
GND
GND
GND
+3R3V+3R3V+3R3V
+3R3V
+15V
-
12V
+5V +8V
VDD5
VDD3R3VDD3R3
LG_PWR
+15V
+15V +15V
+15V+15V
+15V
+15V
+15V
+15V
+15V
+15V
+15V
H8V
H8V
H8V
H8V
H8V
H8V
H8V
H8VH8VH8V
H8V
+3R3V
+3R3V
+3R3V
+3R3V
+8V
+8V
+8V
+8V
- 12V
-
12V
-
12V
- 12V - 12V
- 12V
VDD1R5
VDD5
PWRS
C15V
+5V
LG_PWR
+15V
+8V
- 12V
VDD1R5
VDD1R5VDD1R5
VDD5
C15V
+5V
LG_PWRLG_PWR
+15V
+8V
+8V+8V+8V
+8V
- 12V
- 12V
NC
GND
GND
GND
NC
1
7
2
8
3
9
4
10
5
11
6
12
GND
H8V
H8V
GND
range: input impedance
MESUREMENT CONDITIONS
voltage at RX
frequency: 14.1 MHz
mode: J3E(USB)
Digital tester
ANT(RX): no input
(TX): no modulation
197mV
14.8V
- 11.8V
1.54V 1.21V
7.97V
4.97V
7.98V
4.96V
3.28V
FRONT SW ON: 20.7mV
OFF: 0V
15.1V
8.0V
FRONT SW ON: 1.92V
OFF: 0V
7.95V
3.28V
7.89V
FRONT SW ON: 20.7mV
OFF: 15.1V
7.98V