Sw-A And Sw-B Units - Icom IC-F21 Series Service Manual

12-2 SW-A AND SW-B UNITS

• SW-A UNIT
CP8
HV
• SW-B UNIT
CP8
HV
TP76N00N-15F-10KA-2251
R1
F1
RX (SQL OPEN) 4.1 V
TX 0 V
CHASSIS UNIT
2CH VERSION
S1
W1
W2
EMERGENCY VERSION
S1
TP76N00N-15F-10KA-2251
R1
F1
RX (SQL OPEN) 4.1 V
TX 0 V
S1
2
1
1 2 3
C
4 4
8 5
Q1 XP4216
6
1
5
2
4
3
RX (SQL OPEN) 0 V
TX
DS1
RX (SQL OPEN) 2.1 V
LNJ107W5PRW
TX
G
R2 330
R
R3 560
RX (SQL OPEN) 0 V
TX 2.4 V
Q1 XP4216
1 6
2 5
3 4
RX (SQL OPEN) 0 V
TX
DS1
LNJ107W5PRW RX (SQL OPEN) 2.1 V
TX
G
R
RX (SQL OPEN) 2.1 V
TX
12 - 2
CP10
CBI0
CP11
CBI1
CP12
CBI2
CP13
CBI3
CP9
CBI0
CP1
VOLOUT
CP2 VOLIN
RX (SQL OPEN) 4.8 V
CP3
VCC
TX
CP4 RLED
TX
RX (SQL OPEN) 0 V
CP5
TLED
CP6
GND
4.1 V
0 V
CP9
CBI0
CP1
VOLOUT
CP2
VOLIN
RX (SQL OPEN) 4.8 V
CP3
VCC
TX
CP4
RLED
CP5
TLED
TX
CP6
GND RX (SQL OPEN) 0 V
4.1 V
0 V
R2 330
R3 560
0 V
0 V
4.8 V
0 V
4.8 V