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

10-3 TUNER, MEMORY BOARDS AND CTRL UNIT

L12 L11 L10 L9 L8 L7
LR-307 LR-307 LR-363 LR-363 LR-490 LR-489
RL9 RL8 RL7 RL6
NY-12W-K NY-12W-K NY-12W-K NY-12W-K
C45 150p
MP9
VHFT
24T
18T
14T
10T
7T
35T
Selected 11V
RL1 RL10 RL12 RL14
NY-12W-K NY-12W-K NY-12W-K NY-12W-K
CI1
CI2
CI3
VHCI
VHCO
CO1
CO2
CO3
L20 L18 L16 L14
BM27- BM27- BM27- BM27-
400-6A 400-6A 400-6A 400-6A
L19 L17 L15 L13
BM27- BM27- BM27- BM27-
400-6A 400-6A 400-6A 400-6A
RL2 RL15 RL13 RL11
NY-12W-K NY-12W-K NY-12W-K NY-12W-K
TUNER BOARD
IC1
SC-1380
A16 1 48 A17
A15 A16
A15 2 47 A11
A14
J2 A14 3 BYTE 46 A9
A13 VSS
D8 A13 4 45 D15 A8
A12 DQ15/A-1
D7 A12 5 44 D7 A13
A11
D9 A11 6 DQ7 43 D14
A10 DQ14
D6 A10f 7 42 D6 C4 0.1
A9 DQ6
D10 A9 8 41 D13 A14
A8
D5 9 DQ13 40 D5 A12
NC
DQ5
D11 10 39 D12 A7
NC DQ12
D4 11 38 D4 A6
WE
D12 12 DQ4 37 C1 0.1 A5
RESET
VCC
D3 13 36 D11 A4
NC DQ11
D13 14 35 D3 A3
NC
D2 15 DQ3 34 D10
RY/BY
DQ10
D14 16 33 D2
NC DQ2
D1 A18 17 32 D9
A17
D15 A8 18 DQ9 31 D1
A7
to MAIN-A DQ1
D0 A7 19 30 D8
unit A6 DQ8
A6 20 29 D0
J3504 A5
A5 21 DQ0 28
A4
A4 22 OE 27
A3 VSS
A3 23 26
A2 CE
A2 24 25 A1
A1
HWR A0
RD
RD
CSs
CSf
MEMORY BOARD
10 - 3
L6 L5 L4
CTRL UNIT
LR-490 LR-489 LR-490
RL5 RL4 RL3
NY-12W-K NY-12W-K NY-12W-K
J1
to
P1
FILTER CTIN
unit
J2
MEASUREMENT CONDITIONS MEASUREMENTCONDITIONS
VOLTMETER :50kΩ/VDC VOLTMETER :50kΩ/VDC
IC2 SUPPLY VOLTAGE :13.8V OSCILLOSCOPE :20MHz 1MΩ 25pF
M54562P SUPPLY VOLTAGE :13.8V
18 1 DISPLAY :14.1MHz USB
O1 IN1
17 2 TUNER :ON
O2 IN2
16 3
O3 IN3
15 4
O4 IN4
14 5 J5 CHASSIS W11 J8
O5 IN5
13 6 GND GND
O6 IN6
12 7 GND GND
O7 IN7
11 8 3.5M 3.5M
O8 IN8
10 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
18 1 CI1 CI1
O1 IN1
17 2 GND GND
O2 IN2
16 3 GND GND
O3 IN3
15 4
O4 IN4
14 5
O5 IN5
13 6
O6 IN6
12 7
O7 IN7
11 8
O8 IN8 C302 50p
10 9
GND VS
C301 27p
C17 0.0047
J2
to RF-A P2 C303 50p
RFRX
unit
J101
J3
J3 P3
TUIN TUIN
J4
J4 P4 0.65V
TUOT TUOT
Q25
R154
2.2k 2SC4213
4.6V
IC2
IDT71256SA25PZ
Q12
22 21 A10s DTC114EU
OE A10
23 20 J1
A11 CS
24 19 D15 A9
A9 IO8
25 18 D14 A18 Q13
A8 IO7 D16
26 17 D13 A8 DTA114EU 1SS301
A13 IO6
27 16 D12 A17
WE IO5
28 15 D11 A7
VCC IO4
1 14 A16
A14 GND
2 13 D10 A6
A12 IO3
3 12 D9 A15
A7 IO2
4 11 D8 A5
A6 IO1
5 10 A0 A14
A5 A0
6 9 A1 A4
A4 A1
7 8 A2 A13
A3 A2
A3
A12
A2
to MAIN-A
A11
unit
A1 J3503
A10s
A0
A10f
RESET J6
W2
ANT2
BYTE
EP1
BYTE J5
W1
ANT1
CHASSIS
14V
REF
FOR
C3
20p
C1 C2
2p 68p
D1
HSM88AS R3 R5
10k 220k
IC1b J14 REF
R13
NJM4558M
R1 5 1k
+ 7 AN1
15 6
-
L1
LR-364
R14
8
C228 3 1k
R2 + 1 AN0
270p 2
15 - 2 1
IC1a
4 NJM4558M D3
1SS319
3 4
R4 R6
R121 1k 4M D2 10k 220k
HSM88AS
R120 1k 7M
R119 1k 10M
C4 C5
R118 1k 14M
2p 75p
R117 1k 18M
R116 1k 24M
R115 1k VHF 12 7
C12 C16 R136 R137 K Q
R142
3P 0.0047 10k 47
4 47
6 13
5 CK
14V R15
2 1
100 11 9
D4 5 6 IC2b J Q
R108 1k CO3 TC74ACT32F
DWA010
R109 1k CO2 IC2c
3 4 IC14c IC3b
R110 1k CO1 12 TC74ACT32F R146
TC74AC04F 11 TC74AC112F
9 47
R111 1k NVHF 13 8
10
R112 1k CI3
IC2d
R113 1k CI2
TC74ACT32F
R114 1k CI1 C17 R139 R140 2 6
R144 K Q
82p 10k 47 14
1 47
3 1
2 CK
R17
100 IC2a
7 3 5
11 10 TC74ACT32F J Q
L301 IC14e IC3a
LR-295 TC74AC04F TC74AC112F
D5
HSM88ASR
R34 R35
L302
5.6k 82k
LR-295
D8
R33 IC4b
HSM88AS R31
C32 5.6k NJM4558M
R150 R152 C109 2.2k 5
1p + 7
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
0.03V R45 IC14a IC14b IC14d IC14f
HSM88AS R51
10k -1.6V TC74AC04F TC74AC04F TC74AC04F TC74AC04F R52
6.8k
0.06V Q5 100k
D23
2SK515
MMBV3700LT1
R50 IC4a
R46 R47
R48 6.8k 8 NJM4558M
4.7k 1k 10k 3
+ 1
2
14V -
TRC C39 R49 4
0.0047 100k
RL4 RL1
AE5343 FXE-12G
R53
1.5M
Q14
DTC114EU
Q15
D17
1SS301 DTA114EU
L28 L27
LA-236 LA-246
C105 C64
75p 15p
14V
RL2
FXE-12G
Q16
DTC114EU
D18 Q17
DTA114EU
1SS301
RL3 R90 L25
G5A-237P 220k 100µH
Q22 Q21
DTA114EU DTC114EU
R89
2.2M
R92
R84 R86 4
D20 2 1k
1SS301 10k 180k - 1
3
+
8 6
- 7
D15 IC9a 5
+ IC9b
HSM88AS NJM2903M
NJM2903M
14V L13 100µH
Q211
DTC114EU
REF
FOR Q212
DTC114EU
Q213
DTC114EU
Q214
DTC114EU
Q215
DTC114EU
L2
Q216
10µH
5V DTC114EU
Q217
DTC114EU
Q218
DTC114EU
5V
C46 L10
0.1 100µH
IC6
X24C04S8-2.7
L3 1 8
100µH A0 VCC
-8V 2 7
A1 TEST
3 6
A2 SCL
4 5 49 32
VSS SDA P37/RD
L5 P20/D80
50 31
10µH P36/WR P21/D81
5V 51 30
P35/SYNC P22/D82
52 29
W3 P34
P23/D83
53 28
R26 C24 P33/RESETOUT P24/D84
54 27
47 220p P32/ONW P25/D85
55 26
P31/DA2
P26/D86
56 25
R28 P30/DA1 IC5 P27/D87
57 24
3.3k VCC M38022M2-138FP VSS
D6 58 23
VREF
HSM88AS 59 XOUT 22
AV88 XIN
60 21
P67/AN7 P40/INT4
61 20
P66/AN6
62 P41/INT0 19
P65/AN5 RESET
63 18
P64/AN4 CNV66
64 17
D7 P63/AN3 P42/INT1
R27 C25 HSM88AS
47 220p
R61 100k
R62 100k
R63 100k
R64 100k
4.7V
5V J12
5V ISET
5V
R37 R38
10k 10k
AN3
5V R124
R123
R54 R55 R125
10k 10k
1 2
0.15V
4 3 R122
14V REF R98
TRC FOR R99
3.5V
-8V
-7.9V
12.5V
14V 14V
L33
TUNER ON 0V
100µH
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
VSS QS
Q26
DTC114EU
Q27
DTA114EU
MF1
MP28GA
J10 P1
T14V
PW
PX
PY
PZ
MF2
MP28GA
J11 P2
T14V
AW
4 3 4 3 4 3 4 3 AX
AY
AZ
1 2 1 2 1 2 1 2
0.16µS
4M
7M
10M
8.6V
14M
18M
24M
VHF
NVHF TRC
7.7V
Q23
X1 DTC114EU L32
CR-569 EXC-ELDR25C
CP12
THRU Q24
DTA114EU
4.9V
R106 1k
R105 1k
R71 1k
5.0V
IC13
W4 D13
TA7805F
MA114
O I
G
CP5
IC10 CP4
TC4S69F
R67 R102
1k 5 12k
4 2
3 D11 R65
RD5.1M 1k L35
CP1 CP2 CP3
HF50ACC322513-B
J7
220 MCK
220 MDAT
220 FSTB
GND
IKEY
CP6 CP7 CP8 CP9
ISTA
GND
220 DRES
ANTS
1k REFV
from
10k FORV
MAIN-A
GND
CP10 unit
-8V
J741
L31 GND
CP11
EXC-ELDR25C L36 5V
HF50ACC322513-B 5V
L30 GND
EXC-ELDR25C T8V
GND
14V
L29 CP13
14V
EXC-ELDR25C
14V
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
unit
IN6 O6
7 12 R128 10 L5S J3
IN7 O7
8 11 R127 10 L1S
IN8 O8
9 10 R126 10 L2S
VS GND
R129 10 L4S
C89 0.0047
C90 10
L34
100µH