Icom IC-F620 Service Manual page 32

SECTION 11 VOLTAGE DIAGRAMS
FRONT UNIT
DS12
L1-0483TAT
S1
PWR
S2
S5
P0
S8
P2
J1
8V
CLO R1
AFO
to
PTT
mic
MICE
L1
jack
MIC
GND
R2
CLI
5V
AFVI
R16
1k
R9
1k
KR0
KR1
R8
1k
KR2
D4 MA2S111
KS0
S3
S4 KS1
D5 MA2S111 KS2
V
D6 MA2S111
S6 S7
P1
V
S9 S10
R14
P3 P4 100k
D1
TX: 5.0V
RB706F-40
RX: 0V
PTT
AFO
CLO
1k
D2
RB706F-40
1µ
1k
D3
RB706F-40
CLI (HANG) CLI
8V
Q4 Q3
DTA144EU DTC144EU
Q2
Q1
ON: 7.6V
DTC144EU
DTA144EU
DIM: 6.1V
OFF: 0V
R4 R5 R6
R3
390 4.7k 1k
390
DS1 DS9
DS4 DS7
DS8 DS10
DS2
DS5
DS3 DS6 DS11
DS1-DS11
SML-311YT
5V
8V
2.2V
8V
R21
1M
5V
R24
2.2k
C37 R20
0.22 3.9k 5
1
4
3
2
IC2
TC75S51F
DIM2
SEG22
33 16
S33 S16
SEG23 34
15
S34 S15
SEG24 35
14
S35 S14
SEG25 36 13
S36 S13
SEG26 37 12
S37 P12/S12
SEG27 38 11
S38 P11/S11
DIM1
SEG28 39 10
IC1
S39 P10/S10
SEG29 40 9
LC75824W
S40 P9/S9
SEG30 41 8
S41 P8/S8
SEG31 42 7
S42 P7/S7
SEG32 43 6
S43 P6/S6
SEG33 44 5
S44 P5/S5
SEG34
45 4
S45 P4/S4
SEG35 46
3
S46 P3/S3
SEG36 47 2
S47 P2/S2
SEG37 48 1
S48 P1/S1
R13
270k
5V
R18
R17
10k 10k
R19
10k
R10
100k
R11
100k
J2
8V GND
5V PWR
KR0 LINH
C1
KR1 LCS
47p
KR2 LCK
FSW LSO
HORN AFVI
CLO CLI
PTT GND
AFO MIC
to MAIN
unit J2
11 - 1
SEG5
SEG4
SEG3
SEG2
SEG1
HORN
FSW
DIM2
DIM1
KS2
KS1
KS0