Voltage Diagram; Front Unit - Icom IC-A110 Service Manual

SECTION 10 VOLTAGE DIAGRAM

10-1 FRONT UNIT

Dimmer OFF : 0V
DS4 DS3 DS2
CL-170Y-CD CL-170Y-CD CL-170Y-CD
DS5 DS6 DS7
CL-170Y-CD CL-170Y-CD CL-170Y-CD
S8
POWER
S2
R41 27k
VUP
S3
R42 27k
VDN
S4
R43 15k
KR1
R4 15k
V/M
S5
R44 15k
KR2
R5 15k
SCAN
S6
R47 15k
KR3
R6 15k
PRI
S7
R45 15k
KR4
R7 15k
SQL
R46 27k
S1
EVQB2CFC620B
2
A
3
B
1
COM
4 5
TS
Dimmer OFF : 0V
Light : 7.8V
DS1
Dark : 6.1V HLC7453-012400
R11 CP4
Light : 7.8V 270
Dark : 6.1V
Q5 Q6
DTA143ZU DTC114EU
R12
180
Q1 Q7
DTA143ZU DTC114EU
R13
180
8V
Dimmer OFF : 0V
LED2
Light : 7.7V
LED1
Dark : 6.1V
PSW
R30 10k
C32
0.001
C19 0.001
RX : 0V
TX : 4.95V
C18 0.001
KR1
KR2
KR3
R8
10k
IC2
S-80942ANMP-DD6
1 5
OUT CD
2
VDD
3 4
VSS NC
1
C9 X1
PB7/AN7
2
30p PBRC3.68AR
AVSS
3
X1
4
X2
5
C10
VSS
6
30p
OSC2
7
OSC1
8
TEST
9
RES
PSWC 10
P10/TMOW
11
BEEP
P11/TMOFL
12
P12/TMOFH
ECK
13
P13/TMIG
14
ESO
P14/IRQ4/ADTRG
ECS
15
P15/IRQ1/TMIC
16
DLA
P16/IRQ2
DLB 17
P17/IRQ3/TMIF
OE 18
P30/PWM
EXSTB 19
P31/UD
VCS 20
P32/RESO
BEEP
PSWC
R19 100k
IC4
25LC160T-I/SN
R20 100k
1 8
CS VCC
ESI 2 7
SO HOLD
R21 100k
3 6 ECK
WP SCK
4 5
ESO
VSS SI R22 100k
R31
10k
1.51V
8V
LED2
LED1
CLO
CLIN
C31
0.001
HANG
60 SEG24
P77/SEG24
59
SEG23
P76/SEG23
58
SEG22
P75/SEG22
57
SEG21
P74/SEG21
56
SEG20
P73/SEG20
55
IC1 SEG19
P72/SEG19
54
SEG18
HD6433823A19D
P71/SEG18
53
SEG17
P70/SEG17
52
SEG16
P67/SEG16
51
SEG15
P66/SEG15
50
SEG14
P65/SEG14
49
SEG13
P64/SEG13
48 SEG12
P63/SEG12
47
SEG11
P62/SEG11
46 SEG10
P61/SEG10
45
SEG9
P60/SEG9
44 SEG8
P57/WKP7/SEG8
43 SEG7
P56/WKP6/SEG7
42 SEG6
P55/WKP5/SEG6
41 SEG5
P54/WKP4/SEG5
C20 0.1
5.04V
Q4
XP4315
4 3
R32 R33 R34 EXSTB
10k 10k 3.3k
SO
5 2
SCK
LED1
6 1
LED2
TRC
3.0V 4.5V
R/T
RX : 7.07V
TX : 0V
Q2
2SA1622
IC3
TC7W04FU
R17
1 8
33k 4.75V
2 7
3 6
4 5
R15
18k
0V
Q3
2SC4211
8V
4.95V
R28
1k
D6
DA204U
+
5V
CPU5V
+
5.0V
IC5
BU4094BCFV
1 16
STR VDD
2 15
OE
D OE
3 14
TMUT
CLK Q5
4 13 RMUT
Q1 Q6
5 12
AFMUT
Q2 Q7
6 11 SMUT
Q3 Q8
7 10
Q4 QS
8 9
VSS QS
10 - 1
J2
8V
CLON
AFO
PTT
to
MICE
MICROPHONE
MIC
GND
HANG
SP1
SP W1
+
SPE -
W2
J1
GND
39
GND
GND
37
GND
RMUT
35
SPE
AFMUT
33
SPE
SMUT
31
SP
VCS
29
SP
SCK
27
8V
SO
25
VCC
BEEP
23
5V
FISW
21
TRC
from Main
UNLK
19
Unit J5
TMUT
PLSTB
17
PSWC
SO
15
CPU5V
SCK
13
MICE
R/T
11
MIC
PDET
9
PTT
SQLI
7
PTTS
GND
5
GND
GND
3
GND
GND
1
GND