Tuner-A, Memory Boards And Ctrl-A Unit - Icom IC-756PROIII Service Manual

10-3 TUNER-A, MEMORY BOARDS AND CTRL-A UNIT

L12 L11 L10
LR-307 LR-307 LR-510
RL9 RL16
NY-12W-K NY-12W-K
C45 150p
RL1 RL10
NY-12W-K NY-12W-K
L20 L18
BM27- BM27-
400-6A 400-6A
L19 L17
BM27- BM27-
400-6A 400-6A
RL2 RL15
NY-12W-K NY-12W-K
TUNER-A BOARD
IC1
SC-1415-1
A16 1
A15
A15 2
A14
J2 A14 3
A13
D8 A13 4
A12
D7 A12 5
A11
D9 A11 6
A10
D6 A10f 7
A9
D10 A9 8
A8
D5 9
NC
D11 10
NC
D4 11
WE
D12 12
RESET
D3 13
NC
D13 14
NC
D2 15
RY/BY
D14 16
NC
D1 A18 17
A17
D15 A8 18
A7
to MAIN-A
D0 A7 19
unit A6
A6 20
J3504
A5
A5 21
A4
A4 22
A3
A3 23
A2
A2 24
A1
HWR
RD
RD
CSs
CSf
MEMORY BOARD
L9 L8 L7 L6
LR-511 LA-490 LA-489 LA-490
RL8 RL7 RL6 RL5
NY-12W-K NY-12W-K NY-12W-K NY-12W-K
MP9
IC2
M54562P
VHFT 18
O1 IN1
17
24T
O2 IN2
16
18T
O3 IN3
14T 15
O4 IN4
14
10T
O5 IN5
13
7T
O6 IN6
5T 12
O7 IN7
35T 11
O8 IN8
10
Each Frequency band
GND
Selected 10.5V
RL12 RL14
NY-12W-K NY-12W-K
C18 0.0047
IC1
M54562P
18
CI1
O1 IN1
17
CI2
O2 IN2
CI3 16
O3 IN3
VHCI 15
O4 IN4
14
VHCO
O5 IN5
CO1 13
O6 IN6
CO2 12
O7 IN7
11
CO3
O8 IN8
10
GND
L16 L14
BM27- BM27-
400-6A 400-6A
C17 0.0047
L15 L13
BM27- BM27-
400-6A 400-6A
RL13 RL11
NY-12W-K NY-12W-K
IC2
IDT71256SA15PZ
48 A17 22
OE A10
A16
47 A11 23
A11 CS
BYTE
46 A9 24
A9 IO8
VSS
45 D15 A8 25
A8 IO7
DQ15/A-1
44 D7 A13 26
A13 IO6
DQ7
43 D14 27
WE IO5
DQ14
42 D6 C4 0.1 28
VCC IO4
DQ6
41 D13 A14 1
A14 GND
DQ13
40 D5 A12 2
A12 IO3
DQ5
39 D12 A7 3
A7 IO2
DQ12
38 D4 A6 4
A6 IO1
DQ4
37 C1 0.1 A5 5
A5 A0
VCC
36 D11 A4 6
A4 A1
DQ11
35 D3 A3 7
A3 A2
DQ3
34 D10
DQ10
33 D2
DQ2
32 D9
DQ9
31 D1
DQ1
30 D8
DQ8
29 D0
DQ0
28
OE
27
VSS
26
CE
25 A1
A0
10 - 5
L5 L4
CTRL-A UNIT
LA-489 LA-554
RL4 RL3
NY-12W-K NY-12W-K
MEASUREMENT CONDITIONS
VOLTMETER :50kΩ/VDC
SUPPLY VOLTAGE :13.8V
DISPLAY :14.1MHz/USB
1 R40 1k
2
R39 1k
3
R38 1k
4 R37 1k
5
R36 1k
6 J5 CHASSIS W11 J8
R35 1k
7 GND GND
R34 1k
8 R33 1k 3.5M 3.5M
9 5M 5M
VS
7M 7M
10M 10M
14M 14M
18M 18M
24M 24M
VHF VHF
GND GND
GND GND
14V 14V
14V 14V
CO3 CO3
CO2 CO2
CO1 CO1
NVHF NVHF
CI3 CI3
CI2 CI2
1 CI1 CI1
R41 1k
2 GND GND
R42 1k
3 R43 1k GND GND
4 R44 1k
5
6 R45 1k
7 R46 1k
8
R47 1k
J1
9 to
P1
VS FILTER-A
unit
J2
J2
P2
to RF-B
unit
J101
J3
J3 P3
TUIN
J4
J4 P4
TUOT
21 A10s
20 J1
19 D15 A9
18 D14 A18
17 D13 A8
16 D12 A17
15 D11 A7
14 A16
13 D10 A6
12 D9 A15
11 D8 A5
10 A0 A14
9 A1 A4
8 A2 A13
A3
A12
A2
to MAIN-A
A11
unit
A1
J3503
A10s
A0
A10f
J6
W2
RESET
ANT2
BYTE
J5
EP1
W1
BYTE
ANT1
CHASSIS
L303 100µH
a
b
IC51
CD74HC4094M
16 1 c
VCC STROBE
15 2 d
OE DATA
14 3 e
Q4 CP
Q59
13 4 3.5M
Q5 Q0
DTC114EU
12
5 4.5M
Q6 Q1
11 6
Q7 Q2
10 7 4.6MDL
QS2 Q3
9 8
QS1 GND
Q51
DTC114EU
CI2
CO2
Q52 3 4 3 4
DTC114EU
D241 D25
DWA010 DWA010
2 1 2 1
R121 1k
R120 1k 7M
R119 1k 10M
R118 1k 14M
R117 1k 18M
R116 1k 24M
R115 1k VHF
14V
R108 1k
CO3
R109 1k
R110 1k CO1
R111 1k NVHF
R112 1k CI3
R113 1k
R114 1k CI1
C302 50p
CTIN
MEASUREMENTCONDITIONS
L301
VOLTMETER :50kΩ/VDC
C301 27p
LR-295
OSCILLOSCOPE :20MHz 1MΩ 25pF
SUPPLY VOLTAGE :13.8V
L302
DISPLAY :14.1MHz USB
C303 50p LR-295
TUNER :ON
RFRX
R150 R152 C109
390 4.7k 0.1
TUIN
0.6V
0.03V
Q25
R154
TUOT
2SC4213
2.2k
D23
MMBV3700LT1
4.6V
14V
RL4
AE5343
Q12
DTC114EU
Q13
D16
DTA114EU
1SS301
L28 L27
LA-236 LA-246
C105 C64
75p 15p
RL3
G5A-237P
A
14V
B
C
REF
D
FOR
C3 E
20p
C1 C2 F
2p 68p
G
D1
HSM88AS
R3 R5
10k 220k
5V
H
IC1b
NJM4558M
5
R1
+ 7
15 6 I
-
L1
LR-364
8
3
C228
R2 + 1
270p 2 J
15
-
IC1a
4
NJM4558M
-8V
K
R4 R6
10k 220k
D2
HSM88AS
5V
C4 C5 L
2p 75p
C12 C16 R136 R137
3p 0.0047 10k 47
M
R15
2 1
100
5 6
D4
DWA010
IC14c
3 4
TC74AC04F
C17 R139 R140
82p 10k 47
N
R17
100
11 10
IC14e
TC74AC04F
5V
O
D5
HSM88ASR
D8
HSM88AS
C32
1p
0.13V
D9
R45
HSM88AS
10k
0.08V
1.75V Q5
2SK515
P
R46
4.7k
14V 14V
Q
R
RL1
FXE-12G
S
D17
1SS301
RL2
FXE-12G
T
D18
1SS301
Q22 Q21
DTA114EU DTC114EU
D20
1SS301
U
D15
HSM88AS
V
W