Icom IC-A22 Service Manual

10 - 3
10-3 LOGIC UNIT
VOLTAGE LINE
Explanatory notes
LOGIC UNIT
2SC4211
Q6002
PTT ENB DATA CLK LBATT SQL LOK
VCC
J
I
H
G
F
E
D
C
B
A
R33
R32
R31
24LC08BTI/SW
IC6002
2.2k
R6008
0.1 C6008 3.9k R6009
2SC4211
Q6003
2SB1132
Q6004
2SC4211
Q6005
18k R6020
18k
R6027
UN9211(A3/E)
UNR9211J(A22/E)
Q6006
2SA1622
Q6007
MA111 D6003
33k R6019
6.8k R6018
R30
R13R12R11R10
MA111
D6004
MA6S121
D6005
CY
LOCK
MA
ABSS
BI
WX
VOR
DUP
BO
CLK
DN
F
UP
3
6
MR
9
2
5
8
0
1
R20
4
R21
7
R22
ENT
R23
CLONE
LBATT
4
5
3
2
1
TC4S69F
IC6004
220k R6006
43k R6007
820
R6012
820
R6011
820
R6010
SML-110MT
DS6007
LN1371G-(TR)
DS6003
LN1371G-(TR)
DS6005
SML-110MT
DS6008
LN1371G-(TR)
DS6004
LN1371G-(TR)
DS6002
47k R6001
MA111
D6001
22 C6001
XN4601
Q6001
4
5
3
2
1
S-80845CLMC-B66-T2
IC6003
NC
NC
VSS
VDD
OUT
MA111 D6002
6.8 C6002
100k R6002
1M R6022
22 R6026
18k
R6003
39k R6004
330k R6005
VSS A2 A1 A0
SDA
SCL
TEST
VCC
5678
4321
100k
R6023
47k
R6025
0.01 C6009
47k R6013
BEEP
DOWN
UP
15p C6004 15p C6003
CR-331
X6001
1M
R6024
0.1 C6007 0.1 C6006 0.1 C6005
(FUNCTION DISPLAY)
LD-BU4240J
DS6001
HD404829B96TF
IC6001
D11/INT0 D10/STOPC D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 GND X2 X1 RESET OSC2 OSC1 TEST AVSS AN3 AN2 AN1 AN0 AVCC
R61/SEG14 R62/SEG15 R63/SEG16 R70/SEG17 R71/SEG18 R72/SEG19 R73/SEG20
SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 SEG35 SEG36 SEG37 SEG38
R00/INT1
R01/INT2
R02/INT3
R03/INT4
R10/TOB
R11/TOC
R12/TOD
R13/ENVB
R20/EVND
R21/SCK
R22/SI
R23/SO
R30/SEG1
R31/SEG2
R32/SEG3
R33/SEG4
R40/SEG5
R41/SEG6
R42/SEG7
R43/SEG8
R50/SEG9
R51/SEG10
R52/SEG11
R53/SEG12
R60/SEG13
25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
9 8 7 4 5 6 3 2 1
VTREF
TONER
TONEC
VCC
V3
V2
V1
COM4
COM3
COM2
COM1
SEG52
SEG51
SEG50
SEG49
SEG48
SEG47
SEG46
SEG45
SEG44
SEG43
SEG42
SEG41
SEG40
SEG39
47k R5017
10k
R5016
VORS
VORC
VORO
R10
R11
R12
R13
R20
R21
R22
R23
R30
R31
R32
R33
WX
NAV
ANL
LOW
AFON
TRC
TMUT
SHIFT
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
50
48
49
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75
4V
2.8V
0.25µs
OFF: 0V
ON: 4.5V
LIGHT
OFF: 0V
ON: 7V
LIGHT
0V
5V
0.56V
11.7V
1.8V
4.6V
5V
5V
5V
5V
4.3V
0V

Icom IC-A22 Specifications

General

Brand	Icom
Model	IC-A22
Category	Transceiver
Language	English