Ctrl And Tuner Units - Icom IC-7400 Service Manual

12-6 CTRL AND TUNER UNITS

CTRL UNIT
R9 1M
J1
C1 2p CP1
from IC1b
CTIN
R5
PA unit NJM4558M
R13
J502 220k
5 1k
+ 7
C3 20p 6
-
C2 47p
D1
HSM88AS
R10
R3 10k
820k
R1 18
IC1a
NJM4558M
8
3
1
+
2
- 2
R14
4 1k
D2
HSM88AS
R4 3
10k
R6
220k
C5
C4 2p 56p
C14 33p
C12 3p C13 33p
IC2b
R137
TC74ACT32F
R136 10k 47
4
6
5
R15 100
R142
47
5 6
IC2d
2 1 TC74ACT32F
D4
12
IC14c 11
DWA010
TC74AC04F 13
3 4
C17 R17 R139 R140 IC2a
100 TC74ACT32F
82p 10k 47 14
1
3
2
R144
11 10 7 47
D5 IC14e
HSM88ASR
TC74AC04F
IC14a
14
TC74AC04F
C32
1
2p TX: 4.4V
RX: 0V
IC14f
TC74AC04F
TX: 50mV
D8 Q5
RX: 0V
HSM88AS
2SK515 13
R47 1k
D9 TX: 1.5mV
HSM88AS RX: 0V
TRC
Q12
TX: 0V
DTC114EU RX: 13.8V
RL4
AE5343
RL1
FTR-F1
D16
DA221
J2 L35 L28 L27
P2 EP2 LA-248 LA-247 LA-254
to HRX
RF unit
J1
C116 12p C105 33p C64 82p
L22
LR-364
RL2
FTR-F1
ANT1
W11
R159 4.7k
to
CHASSIS R152 4.7k
D22
ANT2 MMBV3700LT1
W12
TUNER on: 13.8V
D21
MMBV3700LT1
TX: 0V
R153
RX: 13.8V
4.7k
D18
R154 DA221
2.2k C203
Q25
2SC4213 0.0047
TX: 13.8V
RX: 0V
12 - 6
FOR
REF
5VA
L2
10µH
AN1
5VA
L5
IC3b
10µH
TC74AC112F
14
R28
CLR
3.3k
12 7
K Q
R26 C24
13 47 220p
CK
9 D6
11
J Q HSM88AS
AN0
PR
1
D3 10
1SS319
IC3a
TC74AC112F
15 16 D7
4
HSM88AS
CLR VCC
2 6
K Q
R27 C25
1 47 220p
CK
3 5
J Q
GND PR
8 4
R30
MEASUREMENT CONDITIONS
frequency: 14.1MHz USB 220
RX(RF: no input)
TX(AF: no input)
Oscilloscope(20MHz,1MΩ)
Digital tester
Range Input resister
IC2c
200mV 100MΩ
TC74ACT32F 2V 11MΩ
Voltage at RX(No designation)
20V 10MΩ
R35
9
8
R34 82k
10 TX: 2.6V
5.6k
RX: 2.52V
R146 0.162V
47 IC4b
R33 NJM4558M
R37 R38
5.6k
5 10k 10k
7 AN3
+
6
-
R32
100k
R36 1.5M
TX: 0.156V
RX: 0.164V
IC14b
TC74AC04F
2
3 4 0.14V
7
R52
IC14d 100k
R51 5.6k TX: 2V
TC74AC04F RX: 2.15V
8 IC4a
12 9
R50 NJM4558M
R54 R55
6.8k 3
8 10k 10k
1 AN2
+
2
-
1 2
4 D10
R49
100k DWA010
4 3
R53
1.5M
TX: 0.14V
RX: 0.13V
D17
DA221
Q14 1.25mV R90 220k
TX: 13.8V DTC114EU
RX: 0.28V
D23
HSM88AS R89 2.2M IC9b L25 100µH
C214
C211
NJM2903M
1p 0.001
5
7
IC9a +
6
NJM2903M -
C212 C213
22p
12p R158 R157 TX: 54mV 38mV
10K 10K RX: 0V 4
2
1
-
D15 3
+
R92 RL3
HSM88AS
R84
R86 8 1k FTR-F1
10k 220k
off: 0.28V
C62
0.0047
13.2V
Q21
DTC114EU
D20
Q16
DTC114EU DA221
L13
100µH
Q211
13.6V
DTC114EU
P00
Q212
13.6V
DTC114EU
P01
Q213
13.6V
DTC114EU
P02
Q214
13.6V
DTC114EU
P03
Q215
13.6V
DTC114EU
P04
Q216
13.6V
DTC114EU
P05
4M R121 1k
Q217 7M R120 1k
13.6V
DTC114EU 10M R119 1k
P06 14M
R118 1k
18M R117 1k
Q218
13.6V
DTC114EU 24M R116 1k
VHF R115 1k
P07
CO3 R108 1k
CO2 R109 1k
CO1 R110 1k
NVHF R111 1k
CI3 R112 1k
CI2
R113 1k
CI1 R114 1k
14V
L10 100µH
C46 0.1
IC6
X24C04S8-2.7 TUIN
1 8
A0 VCC
2 7
A1 TEST
3 6
A2 SCL
4 5 49 32 4M
VSS SDA P20/DB0
P37/RD
50 31 7M
P36/WR P21/DB1 TUOT
51 30 10M
P35/SYNC P22/DB2
14M 0.16µsec
52 29
P34 P23/DB3
53 28 18M
P24/DB4
P33/RESET OUT
54 27 24M
P32/ONW P25/DB5
55 26 VHF
P31/DA2 P26/DB6
NVHF
56 25
L11 100µH P30/DA1 P27/DB7
IC5
57 24 TRC
VSS
VCC M38022M2-138FP
58 23
VREF XOUT
59 22 X1
AV88 XIN
CR-569
60 21
P67/AN7 P40/INT4 (6.144MHz)
61 20
P41/INT0
P66/AN6
62 19
RESET
P65/AN5
63 18
P64/AN4 CNV66
64 17 THRU
P63/AN3 P42/INT1
W3
CP2
0.16µsec
TX: 4.98V
3.5V
R62 R63 RX: 0V
Q24
100K 100K
DTA114EU
R76 10k
R61 100k
5VA
CP7
SETI
R64 100k
Q23
DTC114EU
W4
IC13
D13
4.92V TA7805F
MA114
O I
G
R105
4.7V
1k
R65
5 R102
2 12k 1k
4
D11
3
RD5.1M
IC10
TC4S69F
REF 0.004V R98 1k
4.44V R99 1k
FOR
-8V -7.6V
L31
4.82V
5VA
HF50ACC322513-B
L29
14V 13.4V HF50ACC322513-B
CTRL UNIT
TUNER UNIT
MF1
J10
MP28GA
T14V T14V
PW PW
PX PX
PY PY
PZ PZ
MEASUREMENT CONDITIONS
J11 frequency: 14.1MHz USB
T14V T14V RX(RF: no input)
TUNER ON
AW AW Digital tester
AX AX MF2 Range Input resister
MP28GA 200mV 100MΩ
AY AY
2V 11MΩ
AZ AZ
20V 10MΩ
J8 J5
RL10
GND GND NY-12W-K-IE
GND GND
35M 35M
7M 7M
10M 10M
14M 14M
18M 18M D14
Q14
24M 24M DA221
DTC114EU
VHF VHF
CI3
GND GND
GND GND RX: 13.4V L1
HF50ACC322513-B
14V 14V
14V 14V
CO3 CO3
CO2 CO2
CO1 CO1
NVHF NVHF RL11
NY-12W-K-IE
CI3 CI3
CI2 CI2
L13,L14
CI1 CI1
BM27-400-6A L13
GND GND
GND GND
Q15
D15
DTC114EU
DA221
CO3
TUIN
J3 J3
P3
TUOT
J4 J4
P4
RL3
L4
NY-12W-K-IE
LA-554
4.4V
J13 P3
Q7
DTC114EU
D7
DA221
CHASSIS
J14
P3 SP1
SSP
PAFE
RL5
L6
VE-12HM-K
LA-490
Q5
DTC114EU
D5
DA221
J7
CIKY
CIST
GND
CANT RL8
L9
GND VE-12HM-K
LA-536
CDRS
GND
CREF
CFOR
GND to
MAIN
GND
unit
C-8V J140 Band Frequency(MHz)
1.9
GND 0.03000∼ 1.99999
Q2
3.5 2.00000∼ 5.99999
C5V
7 6.00000∼ 7.99999 D2 DTC114EU
C5V
10 8.00000∼10.99999 DA221
SETI 14 11.00000∼14.99999
18 15.00000∼19.99999
GND
21 20.00000∼21.99999
CT8V 24 22.00000∼25.99999
28
GND 26.00000∼33.09999
50 45.00000∼60.00000
C14V
C14V
C14V
RL1
NY-12W-K-IE
D8
Q8
DA221
DTC114EU
NVHF
RL12 RL14
NY-12W-K-IE NY-12W-K-IE
D12 D9
Q12 Q9
DA221 DA221
DTC114EU DTC114EU
CI2 CI1
RL13 RL15
NY-12W-K-IE NY-12W-K-IE
MP9
L15,L16 L17,L18
BM27-400-6A L15 BM27-400-6A L17
Q13 Q10
D13 D10
DTC114EU DTC114EU
DA221 DA221
CO2 CO1
L3
RL4 RL2
LA-555
VE-12HM-K-IE NY-12W-K-IE
L19,L20
BM27-400-6A
L19
C35
39p
D11
Q6 Q11
DA221
DTC114EU DTC114EU
D6
DA221
RL6 RL7
L7
VE-12HM-K VE-12HM-K
LA-489
Q4 Q3
DTC114EU DTC114EU
D4 D3
DA221 DA221
RL9
VE-12HM-K
Terminal Voltage(H=4.4V L=0.0V)
Band
1.9 3.5 7 10 14 18 21 24 28 50
Q1
Terminal
D1 DTC114EU 35M L H H H H H H H H H
DA221 7M L L H H H H H H H H
10M L L L H H H H H H H
14M L L L L H H H H H H
18M L L L L L H H H H H
24M L L L L L L L H H H
VHF L L L L L L L L L H
NVHF H H H H H H H H H L
TUNER UNIT