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

10-3 TUNER, MEMORY BOARDS AND CTRL UNIT

L12 L11 L10 L9 L8 L7 L6
LR-307 LR-307 LR-363 LR-363 LR-490 LR-489 LR-490
RL9 RL8 RL7 RL6 RL5
NY-12W-K NY-12W-K NY-12W-K NY-12W-K NY-12W-K
C45 150p
J2 J1
18
VHFT 17
24T 16
18T 15
14T 14
10T 13
7T 12
35T 11
10
Selected 11V
RL1 RL10 RL12 RL14
NY-12W-K NY-12W-K NY-12W-K NY-12W-K
CI1 18
CI2 17
CI3 16
VHCI 15
VHCO 14
CO1 13
CO2 12
CO3 11
10
RL2 RL15 RL13 RL11
NY-12W-K NY-12W-K NY-12W-K NY-12W-K
TUNER BOARD
IC1 IC2
SC-1380 IDT71256SA25PZ
A16 1 48 A17 22
A15 OE
A16
A15 2 47 A11 23
A14 BYTE A11
J2 A14 3 46 A9 24
A13 A9
D8 A13 4 VSS 45 D15 A8 25
A12 DQ15/A-1 A8
D7 A12 5 44 D7 A13 26
A11 A13
D9 A11 6 DQ7 43 D14 27
A10 DQ14 WE
D6 A10f 7 42 D6 C4 0.1 28
A9 VCC
D10 A9 8 DQ6 41 D13 A14 1
A8 A14
DQ13
D5 9 40 D5 A12 2
NC DQ5 A12
D11 10 39 D12 A7 3
NC A7
D4 11 DQ12 38 D4 A6 4
WE DQ4 A6
D12 12 37 C1 0.1 A5 5
RESET A5
D3 13 VCC 36 D11 A4 6
NC DQ11 A4
D13 14 35 D3 A3 7
NC A3
D2 15 DQ3 34 D10
RY/BY
DQ10
D14 16 33 D2
NC DQ2
D1 A18 17 32 D9
A17
DQ9
D15 A8 18 31 D1
to MAIN A7 DQ1
D0 A7 19 30 D8
unit A6
A6 20 DQ8 29 D0
J3504
A5 DQ0
A5 21 28
A4
A4 22 OE 27
A3
VSS
A3 23 26
A2 CE
A2 24 25 A1
A1
HWR A0
RD
RD
CS0
CS3
MEMORY BOARD
10 - 3
L5 L4
LR-489 LR-490
CTRL UNIT
RL4 RL3
NY-12W-K NY-12W-K
J1
to
P1
FILTER CTIN
unit
J2
MEASUREMENT CONDITIONS MEASUREMENTCONDITIONS
VOLTMETER :50kΩ/VDC VOLTMETER :50kΩ/VDC
IC2 OSCILLOSCOPE :20MHz 1MΩ 25pF
SUPPLY VOLTAGE :13.8V
M54562P SUPPLY VOLTAGE :13.8V
1 DISPLAY :14.1MHz USB
O1 IN1 TUNER :ON
2
O2 IN2
3
O3 IN3
4
O4 IN4
5 J5 CHASSIS W11 J8
O5 IN5
6 GND GND
O6 IN6
7 GND GND
O7 IN7
8 3.5M 3.5M
O8 IN8
9 7M 7M
GND VS
10M 10M
14M 14M
18M 18M
24M 24M
C18 0.0047
VHF VHF
GND GND
NC NC
14V 14V
14V 14V
CO3 CO3
CO2 CO2
CO1 CO1
NVHF NVHF
IC1 CI3 CI3
M54562P CI2 CI2
1 CI1 CI1
O1 IN1
2 GND GND
O2 IN2
3 GND GND
O3 IN3
4
O4 IN4
5
O5 IN5
6
O6 IN6
7
O7 IN7
8
O8 IN8
9
GND VS
C17 0.0047
J2
to RF P2
RFRX
unit
J101
J3
J3 P3
TUIN TUIN
J4
J4 P4 0.65V
TUOT TUOT
R154
2.2k
4.6V
Q12
21 A10s DTC114EU
A10
20 J1
CS
19 D15 A9
IO8
18 D14 A18 Q13
D16
IO7 DTA114EU
17 D13 A8 1SS301
IO6
16 D12 A17
IO5
15 D11 A7
IO4
14 A16
GND
13 D10 A6
IO3
12 D9 A15
IO2
11 D8 A5
IO1
10 A0 A14
A0
9 A1 A4
A1
8 A2 A13
A2
A3
A12
A2
to MAIN
A11
unit
A1
J3503
A10s
A0
A10f
RESET J6
W2
ANT2
BYTE
EP1
J5
W1
ANT1
CHASSIS
14V
REF
FOR
C3
20p
C1 C2
2p 68p
D1
HSM88AS R3 R5
10k 220k
J14 REF
R13
R1 5 1k
+ 7 AN1
15 6
- IC1b
NJM4558M
R14
8
R2 3 1k
+ 1 AN0
15
2
- 2 1
IC1a
4
NJM4558M D3
1SS319
R4 R6 3 4
10k 220k
D2
HSM88AS
R121 1k 4M
C4 C5
R120 1k 7M
2p 75p
R119 1k 10M
R118 1k 14M
R117 1k 18M
R116 1k 24M
R115 1k VHF 12
C12 C16 R136 R137 K
R142
3P 0.0047 10k 47
4 47
6 13
5 CK
14V R15
2 1 100
11
D4 5 6 IC2b J
R108 1k CO3
DWA010 TC74ACT32F
R109 1k CO2 IC2c
3 4 IC14c R146
R110 1k CO1 12 TC74ACT32F
TC74AC04F 11 9 47
R111 1k NVHF 13 8
10
R112 1k CI3
IC2d
R113 1k CI2
TC74ACT32F
R114 1k CI1 C17 R139 R140 2
K
82p 10k 47 14 R144
1 47
3 1
2 CK
R17
IC2a
100
7 TC74ACT32F 3
11 10 J
IC14e
TC74AC04F
D5
HSM88ASR
R34 R35
5.6k 82k
D8
R33 IC4b
HSM88AS R31
C32 5.6k NJM4558M
2.2k 5
R150 R152 C109 1p +
390 4.7k 0.1 6
14 -
-0.2V C27 R32
1 2 3 4 9 8 13 12
0.0047 100k R36 1.5M
7
D9
R45 IC14a IC14b IC14d IC14f
HSM88AS R51
0.03V 10k -1.6V TC74AC04F TC74AC04F TC74AC04F TC74AC04F R52
6.8k
100k
0.06V Q5
Q25 2SK515
2SC4213
R47 R50
R46 R48
1k 6.8k 8
4.7k 10k 3
+
2
14V -
C39 R49
TRC 4
0.0047 100k
RL4 RL1
AE5343 FXE-12G
Q14
DTC114EU
Q15
D17
DTA114EU
1SS301
L28 L27
LA-236 LA-246
C105 C64
75p 15p
RL2 14V
FXE-12G
Q16
DTC114EU
Q17
D18
DTA114EU
1SS301
RL3 R90 L25
G5A-237P 220k 100uH
Q22 Q21
DTA114EU DTC114EU
R89
2.2M
R92
4
D20 R84 R86 2 1k
10k 180k - 1
1SS301
3
+
8 6
D15 IC9a 5
HSM88AS NJM2903M
14V
Q211
L13
DTC114EU
REF 100uH
FOR
Q213
DTC114EU
Q215
DTC114EU
L2
10uH
5V
Q217
DTC114EU
C46
0.1
IC6
X24C04S8-2.7
L3
1 8
100uH A0 VCC
-8V 2 7
A1 TEST
3 6
A2 SCL
4 5 49
L5 VSS SDA P37/RD
50
10uH P36/WR
5V 51
P35/SYNC
52
W3 P34
53
P33/RESETOUT
R26 C24
54
47 220p P32/ONW
7 55
Q P31/DA2
56
R28 P30/DA1 IC5
57
3.3k VCC M38022M2-138FP
D6 58
HSM88AS VREF
9 59
Q AV88
60
P67/AN7
61
IC3b P66/AN6
62
TC74AC112F P65/AN5
63
P64/AN4
D7 64
P63/AN3
R27 C25 HSM88AS
47 220p
6
Q
5
Q
IC3a
TC74AC112F
R61 100k
R62 100k
R63 100k
4.7V R64 100k
5V J12
5V ISET
R37 R38
10k 10k
7 AN3
5V
IC4a
NJM4558M R54 R55
10k 10k
1
1 2
0.15V
4 3
R53
1.5M
14V REF
TRC FOR
THRU
3.5V
-8V
-7.9V
12.5V
14V 14V
TUNER ON 0V
OFF 4.9V
THRU
FOR
IC11
BU4094BCF
5V 1 16
STRB VDD
2 15
DATA OENA
3 14
CLK Q5
4 13
Q1 Q6
5 12
Q2 Q7
6 11
Q3 Q8
7 10
Q4 Q'S
8 9
- 7 VSS QS
Q26
+ IC9b
DTC114EU
NJM2903M
Q27
DTA114EU
MF1
MP28GA
Q212
DTC114EU
J10 P1
T14V
PW
Q214 PX
DTC114EU PY
PZ
MF2
MP28GA
Q216
DTC114EU
J11 P2
T14V
Q218
DTC114EU AW
4 3 4 3 4 3 4 3 AX
AY
AZ
1 2 1 2 1 2 1 2
0.16uS
32 4M
P20/D80
31 7M
P21/D81
30 10M
P22/D82 8.6V
29 14M
P23/D83
28 18M
P24/D84
27 24M
P25/D85
26 VHF
P26/D86
25 NVHF TRC
P27/D87
24
VSS
23
XOUT
22
XIN 7.7V
21 Q23
DTC114EU
P40/INT4 X1
20
P41/INT0 CR-569
19
RESET CP12
18
CNV66 L32
17 THRU Q24
P42/INT1 EXC-ELDR25C
DTA114EU
C226
4.9V 0.0047
R106 1k C202
47p
R105 1k
R71 1k
C201
47p
5.0V C200
47p
IC13
W4 D13
TA7805F
MA114
O I
G
CP5
CP4
IC10
R67 TC4S69F R102
1k 5 12k
4 2
3 D11 R65
RD5.1M 1k L35
CP1 CP2 CP3
HF50ACC322513-B
J7
R124 220 MCK
R123 220 MDAT
R125 220 FSTB
GND
IKEY
CP6 CP7 CP8 CP9
ISTA
GND
R122 220 DRES
ANTS
R98 1k REFV
R99 10k FORV from
MAIN
GND
CP10 unit
-8V J741
L31 GND
EXC-ELDR25C CP11
L36 5V
HF50ACC322513-B 5V
L30 GND
EXC-ELDR25C T8V
GND
14V
CP13
L29 14V
EXC-ELDR25C
14V
L33
100uH
IC12
TD62783AF J13
1 18 GND
IN1 O1 CP14 CP15 CP16 CP17 CP18 CP19 CP20 CP21
2 17 GND
IN2 O2
3 16 R133 10 L8S
IN3 O3
4 15 R132 10 L7S
IN4 O4
5 14 R131 10 L3S from
IN5 O5
FILTER
6 13 R130 10 L6S
IN6 O6 unit
7 12 R128 10 L5S
IN7 O7 J3
8 11 R127 10 L1S
IN8 O8
9 10 R126 10 L2S
VS GND
R129 10 L4S
C89 0.0047
C90 10
L34
100uH