Rf Unit (Inc. Prt Unit And Vco Board) - Icom IC-A22 Service Manual

10-2 RF UNIT
560(IC-A22/E)
390(IC-A3/E)
TX: 0V
RX: 3V
IF
C4040
Q4003
0.01
2SC4215
TX: 0V
RX: 1.4V
R5
AGC
RF-AGC
J4005
HV
to MAIN
VCC
unit J5004
J4006
5V
CLK
ENB
DATA
LOK
+5
WX
VCC
TMUT
to MAIN
MOD
unit J5003
LOW
IF
R5
AGC
SPE
EXTSP
INTSP
SIDET
CLONE
RF-AGC
EXTMIC
EXTPTT
C4108
0.001
D4020
J4002
SB30-03P
(DC 12V)
C4148 D4025
0.001 SB30-03P
F8001 SSFC3A
+
to
-
BATTERY
C 11.7V
PACK
C4149
PRT UNIT 0.001
FI4001
FL-221(IC-A22/E)
FL-203(IC-A3/E) L4012
R4022 LS-492
TX: 0V
RX: 0.5V
Q4002
3SK151
TX: 0V
0V
RX: 1.35V
TX: 0V
RX: 2.05V R4018
10k
D4012
1SV246
D4010 C4049 C4053
MA77 0.001 0.001
R4095
TX: 2.8V TX: 2.4V
RX: 0V RX: 0V
TX: 1.8V
C4051 R4073 C4129
RX: 0V
0.001 220 0.001
220k(IC-A22/E)
220(IC-A3/E)
C4158 C4047
0.001 22p
TX: 2.1V
RX: 2.2V
3.1V
MOD
5V 4.2V
Q4021
2SC4116
VCO
C7013
BOARD
0.001
Q4016
UNR9210J(A22/E)
UN9210(A3/E)
R7008 220k
SHIFT
R7009 10k
GND
TX: 0V
LV
RX: WX ON: 0V
WX OFF:3.8V
L7001 L7002
0.82µH LA-487
L4025
4.7µH
5V
R4065
2.2k
WX ON: 4.4V
OFF: 1.3V
11.7V
WX ON: 5V
Q4018
OFF: 0V
D4018 XP4601
Q4019
MA132WK
R4066
UNR9210J(A22/E)
10k(A22/E)
UN9210(A3/E)
1k(A3/E)
WX
Q4017
UNR9210J(A22/E)
UN9110(A3/E)
RF UNIT
TX: 0V
RX: 5V
L4010
LB-326 TX: 0V
TX: 0V
RX: 0.7V RX: 1.45V
G2
Q4001
G1
3SK230
R4015 R4014
220k 220k
68p(IC-A22/E)
0.001(IC-A22/E)
0.001(IC-A3/E)
68p(IC-A3/E)
TX: 0V
RX: 2.9V
TX: 3.2V
RX: 0V
TX: 3.5V
RX: 0V
C4058
D4013 0.001
1SV246
R4044
C4057
2.2k
0.001
C4054
8p
TX: 0.8V(IC-A22/E)
Q4007
0.5V(IC-A3/E) C4059
2SC3357
RX: 0V 39p
Q4006
2SC4403
TX: 0.8V
RX: 0V
0.8V
Q4005
C4152 R4089 C4045
2SC4403
0.001 56 180p
Q4004
2SC4403
3.1V
5V
R7004 220 R7005 100
C7005
1.5p 2.7V
C7014
0.001
2.3V
0.65V 0.95V
R7001 C7006
8.2k 0.001
C7009
Q7002
18p
2SC4226
C7004 R7002
1.5p 220
2V C7008
3.5V
0.5p
Q7003
2SC4403
Q7001
2SC4226
0.8V
TMUT
C4097
0.001
Q4015
2SC4403
R4098 100k
IC4001
µPD3140GS
X4001
CR-456
TX: 1.43V
RX: 1.5V
MEASUREMENT CONDITIONS
VOLTAGE: 12.0V
VOLTMETER:50kΩ/V DC
FREQUENCY: 127.025MHz(NO MODULATION)
TX: 0.65V
RX: 0.65V
C4023 L4008 L4005 L4004
0.001
LB-170 47nH 56nH
C4010
0.001
TX: 1.7V
RX: 0V
R4001 L4007
100 0.82nH
IC4002
SC-1303
GND GND
C4130 L4006
1 2 3 4
0.001 56nH
C4014
TX: 3.4V
0.001
RX: 0V
0.8V
11.7V
0.001(IC-A22/E)
0.3p(IC-A3/E)
VCC
Q4013
2SB1132
TX: 5V
R4030 C4043
RX: 0V
27k 0.001
Q4012
2SC4211 TX: 5V
RX: 0V
D4016
MA111
T+5
TX: 4.4V Q4011
RX: 0V
UNR9210J(A22/E)
UN0210(A3/E)
R4027
15
OUT Q4014
R4059
2SC4211
10k
EXTMIC
1.45V EXTPTT
0.6V
2.8V
Explanatory notes
VOLTAGE LINE
SIDET
TX LINE
CLONE
RX LINE
INTSP
EXTSP
COMMON LINE
SPE
10 - 2
CHASSIS
J3001
C4006 L4003 L4002 L4001
0.001 64nH 64nH 47nH
(ANT)
C4004 C4002
3p 7p
TX: 0.85V
RX: 0V
Q4010
XP1401
J4003
EXTMIC
EXTPTT (MIC)
Q4020
XP4601
TX
EXT SP CONNECTED: 5V
EXT SP NOT CONNECTED: 0V
RX: 0V
TX
EXT SP CONNECTED: 0.65V
EXT SP NOT CONNECTED: 0V
RX: 0V
J4004
CLONE
INTSP (SP)
EXTSP
SPE