Icom IC-7700 Service Manual page 119

DC-DC UNIT
LG_PWR
1
2
-12V
3
+15V
4
+15V
5
6
+8V
7
+3R3V
8
9
+3R3V
10
J1
B10B-PH-SM4-TB
1
2
VDD1R5
3
4
VDD3R3
5
VDD5
6
PWRS
7
C15V
8
9
J2
B 9B-PH-SM4-TB
GND
GND
13
+3R3V
+3R3V
12
+3R3V +3R3V
11
GND
GND
10
+5V
+5V
9
+8V
+8V
8
+15V
+15V
7
+15V +15V
6
-12V
-12V
5
GND
GND 4
GND
GND
3
+5V
+5V
2
GND GND
1
J3
B13B-PH-SM4-TB
C206
100P
+15V C202 R204
1
+15V
2
GND 0.001 27K
3
GND R205 15K
4
C203
J8 0.1
B 4B-PH-SM4-TB
C303 0.1
C302 R304
0.001
C306 27K
100P
GND
GND
7
C15V
C15V
6
+8V
+8V
5
GND
GND
4
+15V
+15V
3
+3R3V
+3R3V
2
GND GND
1
J5
B 7B-PH-SM4-TB
EP302
MPZ2012S331A
J6
B 6B-PH-SM4-TB
6
+8V
5
+3R3V
4
+5V
3
-12V
2
1
J7
B 8B-PH-SM4-TB
8
7
+15V L803
6
+8V
5
+3R3V
4 33U
+5V
3
-12V
2
1
+15V
+8V
C15V
VDD5
EP201
+3R3V
MPZ2012S331A
MP201
2590
IC201 L201
1 25
PGND1 SW1L
2 24
33U
COMP1 SW 1
3 23
FB1 SW 1 C204
4 22
RT BOOT1
5 21 0.1
NC PVCC
6 20
SS1/SD PVCC
7
VCC
8 19
SS2/SD PVCC L211 EP211
9 18 C304
NC PVCC
10 17
FB2 BOOT2 33U MPZ2012S331A
11 16
COMP2 SW 2 0.1
12 15
GND SW 2
13 14
PGND2 SW2L
BD9302FP
L301
33U
L302 EP301
10U MPZ2012S331A
MP801
2590
IC801
1 8
NC OUTPUT D803
2 7
NC VIN
3 6
NC GND R802
C802 RB081L
4 5
FB ON/OFF
0.1
47K
LM2594M
-12V
D802
MBRD835LT4G
10 - 29
+8V
C15V
RL142
H8V
AW3023
L141
10U
Q141
DTD113ZK
EP402 EP401
MPZ2012S331A MPZ2012S331A
MP401
2590
C406
100P IC401 L401
R404 1 25
PGND1 SW1L
C402 2 24
COMP 1 SW 1 33U
0.001 27K 3 23
FB1 SW 1 C404
R405 4 22
RT BOOT1
15K 5 21 0.1
NC PVCC
6 20
C403
SS1/SD PVCC
0.1
7
VCC
8 19
C503 0.1
SS2/SD PVCC L411
9 18
NC PVCC
C502 R504 10 17 C504
FB2 BOOT2 33U
0.001 11 16 0.1
COMP 2 SW 2
12 15
C506 27K
GND SW 2
100P 13 14
PGND2 SW2L
BD9302FP
L501
33U
EP502 VDD1R5 EP501
MPZ2012S331A MPZ2012S331A
EP602 EP601
MPZ2012S331A MPZ2012S331A
MP601
2590
C606
100P
IC601 L601
1 25
C602 R604
PGND1 SW1L
2 24
COMP 1 SW 1 33U
0.001 27K 3 23
FB1 SW 1
C604
R605 4 22
RT BOOT1
5 21
15K 0.1
NC PVCC
6 20
C603
SS1/SD PVCC
0.1
7
R706 VCC
8 19
SS2/SD PVCC L611
9 18
0 NC PVCC
10 17
33U
FB2 BOOT2
11 16
COMP 2 SW 2
12 15
GND SW 2
13 14
PGND2 SW2L
BD9302FP
1
LG_PWR
2
C15V
3
C15V
4
5
6
7
8
H8V
9
H8V
10
W1
OPC-1803
H8V