Voltage Diagrams; Main Unit - Icom IC-A22 Service Manual

SECTION 10

VOLTAGE DIAGRAMS

10-1 MAIN UNIT

BEEP
PTT UNIT
C5022
0.1
TX
EXP SP CONNECTED: 4.2V
EXP SP NOT CONNECTED:0V
RX: 4.3V
Q5007
2SC4211
R5027
18k
0.1(IC-A22/E)
0.0022(IC-A3/E)
J9001
TX
EXP SP CONNECTED: 9.2V
EXP SP NOT CONNECTED:0V
J6003
RX: 9.6V
to LOGIC unit
J6002
J6002 J5002
18 17 1 2
DE GND
DE GND
UP GND
UP GND
DOWN NAV
DOWN NAV
LOK SQL
LOK SQL
TRC BEEP
TRC BEEP
SHIFT DETO
SHIFT DETO
PTT AFDN
PTT AFDN
LOW WX
LOW WX
TMUT ANL
TMUT ANL
2 1 17 18
to LOGIC unit
J6001
J6001 J5001
18 17 1 2
GND CLONE
GND CLONE
GND GND
GND GND
GND GND
GND GND
GND VCC
GND VCC
+5 GND
+5 GND
GND GND
GND GND
GND CLK
GND CLK
GND DATA
GND DATA
INTMIC ENB
INTMIC ENB
2 1 17 18
to
MAIN UNIT
TX: 3.6V
RX: 5V
TX: 4.5V
RX: 0V
TX: 4.5V
RX: 5V
Q5027
2SA1622
R5089
10k
0.01(IC-A22/E)
0.001(IC-A3/E)
TX: 3.8V
RX: 5V
R5091 D5008
33k MA111
DOWN
DE
UP
C5070 C5071
0.001 0.001
S5001
UP
E
LOGIC UNIT
DN
(DIAL)
TX: 0V
VCC
RX: 2V
Q5005
2SC4211
11.7V R5021 R5078
39k 39k
IC5003
TA7368P
Q5006
2SB1201
Q5026
2SC4211
TX: 0V
R5025
630 RX: 2.7V
TX: 0V
RX: 3.4V
TX: 0V
RX: 0.8V
R5115
18k
R5082
RV-298
(SQL)
SPE
(VOL)
D5013
MA111 R5083
10k
(POWER)
IC5008
TC4S66F
5 4
1 2
R5085 C5075
22k 0.1
3
VCC
5V
IC5006
S-812C50AMC-C3E
I O
G
TRC
+5
Q5013
C5040 R5044 XP4315
0.047 3.9k
TX: 11.6V TX: 11.6V
RX: 11.7V RX: 0V
R5092 Q5028 R5117 C5041 R5045
18 2SB1132 150 0.1 47k
PTT
D5014
MA111
D5009
MA113
TX: 11V
RX: 11.2V
Q5029
UNR9211J(A22/E)
UN9211(A3/E)
EXTPTT
10 - 1
TX: 0V TX: 0V
RX: 5V RX: 0.65V
C5081
0.01
Q5004
2SC4211
IC5002
TX: 0V
TC4W53F
R5072 C5060
RX: 0.4V
100k 0.01
D5003 R5015
1 8
MA111 220k
TX: 0V
2 7
RX: 2.8V
3 6
TX: 0V
4 5
RX: 0.07V
TX: 0V
RX: 1.1V
ANL ON: 5V
ANL OFF: 0V
WX
Q5008
UNR9210J(A22/E)
UN9210(A3/E)
C5024 R5017
0.22 330k
ANL TX: 0V
RX: 0.15V
TX: 0V
RX: 0V
R5029 R5030
VOR: 5V
100k 56k
DETO
Q5009
UNR9210J(A22/E)
UN9210(A3/E) C5025
10
NAV
R5127 Q5031
1M 2SD1819
R5105
SQL
150k
R5114 R5113
47k 22k
TX: 0V
RX: 0.1V
R5043
100k
R5
TX: 0V
5 3 RX: 1V
4 +
1
-
IC5007
2
TA75S393F
11.7V
TX: 0V
Q5014 Q5016
RX: 5.1V
Q5015 Q5017
2SB1132 2SB1132
5V
R5063 2SC4211 2SC4211
10k
+5V
TX: 5V
D5005 D5006 RX: 0V
MA111 MA111
Q5018
4.6V
UNR9110J(A22/E)
4.5V
UN9110(A3/E)
5V
TX: 5V TX: 2.5V
RX: 0V RX: 0V
IC5005b
TC75W51FU
R5058 R5059 R5060
R5052 5 39k 39k 39k
+ 7
100k
TX: 1.8V 6
-
RX: 0V
R5050
15k
R5055
IC5004
100k
BA3308F
8 7
0.0033(IC-A22/E) 180p(IC-A22/E)
9 6
D5011 0.0027(IC-A3/E) 150p(IC-A3/E)
10 5
MA8036
11 4
12 3
C5089
13 2
0.001
14 1
R5051
1M
MEASUREMENT CONDITION
C5045
VOLTAGE: 12.0V
2.2
VOLTMETER:50kΩ/V DC
FREQUENCY: 127.025MHz(VOR: 113.000MHz)
(NO MODULATION)
MAIN UNIT
TX: 0V
RX: 0.75V
C5006
0.01
R5101 C5007
220k 0.01
TX: 0V
Q5003
RX: 3.4V
2SC4215
TX: 0V
RX: 1.0V
Q5002
2SC4215
R5124 C5004
Q5030 1.5k 0.01
2SC4215
TX: 0V
RX: 1.15V
R5088
170k(IC-A22/E)
1k(IC-A3/E)
TX: 0V
RX: 1.15V
TX: 0V
RX: 3V
AGC
Q5010
2SD1819
TX: 0V
RX: 3.3V
RF-AGC
R5037 C5033 R5036
100k 0.01 470
R5035
1.5k
X5002
CDBM455C24
Q5019 IF
Q5020
2SB1132
2SC4211
R5
5V
D5007
MA111
TX: 0V
RX: 4.6V SHIFT
CLK
ENB
DATA
LOK
+5V
WX
VCC
TMUT
MOD
LOW
IC5005a
TC75W51FU
3 8
+ 1 IF
2
- R5
4 C5051
AGC
1
SPE
EXTSP
INTSP
SIDET
CLONE
RF-AGC
EXTMIC
EXTPTT
TX: 2.5V
RX: 0V
Explanatory notes
VOLTAGE LINE
TX LINE
J5005
RX LINE
INTSP
SPE
FI5001
CFWS455D
1 2
3 4 5
R5
X5001
CR-485
IC5001
TA31136F(D)
J5004 P5001 J4005
HV
VCC
J5003 J4006
5V
GND
GND
GND
SHIFT
CLK
ENB
DATA
LOK
+5V
WX
GND
VCC
VCC
TMUT
MOD
LOW
GND
IF
IF
R5
AGC
SPE
EXTSP
INTSP
SIDET
CLONE
RF-AGC
EXTMIC
EXTPTT
RF
UNIT
J4002
(DC 12V)
CHASSIS
+
SP3001
to
-
BATTERY
C
PACK
PRT UNIT