Main-A Unit (2) - Icom IC-756PROII Service Manual

10-5 MAIN-A UNIT (2)

MAIN-A UNIT (2)
BUS LINE1
14V
14V
8V
8V
M5V L3602 HF50ACC322513-B
M5V
H5V L3601 HF50ACC322513-B
H5V
3R3V_d L3501 HF50ACC322513-B
3R3V_d
HV
HV
–5V
–5V
R8V
R8V
T8V
T8V
UNLC
D3601
TRV ON : 0V RX 0V RX 8V MA2S111
OFF : 4.8V TX 8V TX 0.2V
7.8V
3R3V
TMD R3603
Q622
UMH11N D611 D601
LFMD R3604
4 DA221 Q611 DA221 Q601
R622 LMFD R3605
1.5k 2SD1619 2SD1619
5 3 Q621 ISTA R3608
2SA1577 IKEY R3609
6 2
1 R612 R602
MAIN-A (1)
R621 1k 1k
47k TRVI R3612
RXS R3617
R613 R603
TXS R3618
10k 10k
Q612 Q602
2SC4081 2SC4081
TRAS
RX 4.4V RX 0V
SENI
TX 0V TX 4V
RECI PWRS R3622
MOSL
CW KEY DOWN
VOSL
SIDE TONE LIMIT :OFF
RECO
800mV
REAF
DTAF BEEP R3625
0V
R3032
100k
2.45mS
STON
L3001 10µH
L3002 100µH IC321A
NJM4558M
VRAC
VINT
MCK
SCPL
VOXL C3638 0.1
IC3005
IC3001 BU4053BCFV AVXL
ISD4003-04MS 16
VCS 1 28 12 14
SS SCLK X0 X
MDAT 2 27 13 15
MOSI VCCD X1 Y
3 26 2 4
MISO XCLK Y0 Z
VDTI 4 VSDD INT 25 1 Y1 IC3631
5 24 5 BU4053BCFV
NC RAC Z0
6 23 3 FORL 1
NC VSSA Z1
7 22 6 NSQO 2
NC NC INH
8 21 11 REFL 3
NC NC A
9 20 10 4
NC NC B
VX1 10 19 9 FMTL 5
W3001 NC NC C
11 18 C3004 R3017 6
R3025 C3013 VSSA VCCA 1 2.2k
12 17 7 8 7
10k 0.1 VSSA ANAIN+
VX2 13 16 8
AUDOUT ANAIN–
14 15
R3026 AMCAP NC C3003 C3032
0.1
1.5M 0.1
R3028 C3021
6
IC3004B 7 – 82k 0.1 R3650
NJM4558M + 5
4.7k
ALCL
R3019 R3030 SML
100k
220
8 3 R3013 C3012
IC3004A 1 + 10k 0.047
2
NJM4558M –
4
PWRK R3647
R3006 C3030 C3025 R3021
SKYS R3643
470 0.1 10 220
RTKI R3644
IC3002
BU4053BCFV
16
MICI 12 14 IC3003
X0 X R3020 M5282FP
13 15
2 X1 Y 4 47k 1 10 C3015 B
Y0 Z VCC2 VCC 10
1 2 9
Y1 IN+ VCAOUT
5 3 8
Z0 IN– CTL
AMPO 3 4 7
Z1 OUT VCAIN
6 5 6
INH R3034 GND NC
MISL 11 1.2k
A
MICE 10 G
B
9
C C3017
10
7 8
R
MICO
VOGV
8V
–5V R3022
470
M5V HSYNC
VSYNC
10 - 5
L3603 RCR-875D-472K
HV
RXF
UNLC_
R3601
1k R3602
47k
FZVP
Q3002
2.2k DTA114EE TMD_ FZRS
1k LRXD_
1k LTXD_
1k ISTA_
1k IKEY_
ASL
1k TRVI_
1k RXS_
1k TXS_
103
104 AVCC
VREF
SCPL_ 105
P40/AN0
VOXL_ 106
P41/AN1
1k AVXL_ 107
P42/AN2
ASO0 108
P43/AN3
ASO1 109
P44/AN4
ASO2 110
P45/AN5
STON_ 111
P46/AN6/DA0
1k BEEP_ BEEP_ 112
P47/AN7/DA1
113
AVSS
114
C323 VSS
SENI 115
0.001 P17/PO15/TIOCB2 IC3501
PWRS_ 116
P16/PO14/TIOCA2 HD64F2357F20
CCS 117
R323 R322 C322 R3626 P15/PO13/TIOCB1
8 – 2 CWR 118
1 120k 120k 0.0047 1k P14/PO12/TIOCA1
+ 3 STON_ ECS 119
4 IDTI 120 P13/PO11/TIOCD0
P12/PO10/TIOCC0
IDTO 121
P11/PO9/TIOCB0
ICK 122
P10/PO8/TIOCA0
123
MD0
124
MD1
FZMD 125
MD2
TRAS 126
PG0/CAS
CS3 127
PG1/CS3
CS2 128
PG2/CS2
R3637 1k SCPL_
R3638 1k VOXL_
R3639 1k AVXL_
R3641 1k ASO1_
R3640 1k ASO0_
R3642 1k ASO2_
ASL CS1
CS0
16 R3531 220k
Y1 VDD
15 R3532 220k
Y0 Y
14 R3533 220k
Z1 X
13 R3534 220k
Z X1
12 R3535 220k
Z0 X0
11 R3536 220k
INH A R3649
10 R3537 220k
VEE B NTCCM16084BH
9 R3538 220k
VSS C
R3539 220k
R3540 220k
R3541 220k
D3508 D3509
RB706F-40 RB706F-40
IC3503
X25320SI-2.7
1k PWRK_ IDTO 5 4
SI VSS
1k SKYS_ ICK 6 3
SCK WP
1k RTKI_ 7 2
HOLD SO
8 1
VCC CS
R3508
IDTI 47k
ECS
CCS
IC3504 R3783
RTC-4553A
47k
R3572 39k FPDAT14 1 14
GND TPOUT
R3573 20k FPDAT8 CWR 2 13
WR SOUT
R3574 10k FPDAT7 3 12
IC3502 SIN CS1
R3575 10k FPDAT6 S-80942ANMP-DD6 4 11
SCK CS0
R3576 10k 1 5 5 10
OUT CD L1 L5
2 6 9
VDD L2 L4
R3582 39k FPDAT11 3 4 7 8
VSS NC L3 VDD Q3504
R3583 20k FPDAT5
2SA1576
R3584 10k FPDAT4
R3585 10k FPDAT3
R3586 10k
R3592 39k FPDAT9
R3593 20k FPDAT2 Q3505
R3594 10k FPDAT1 DTC144EE
R3595 10k FPDAT0
R3596 10k
HSYNC
VSYNC
M5V
14V
8V
M5V_
H5V_
3R3V_d
RXF
DRES_
IC3752
C3501 BU4094BCFV
16
12p
MSTB 1 4
STR Q1
MDAT 2 5
D Q2
MCK 3 6
C3502 CLK Q3
12p 15 7
OE Q4
14
Q5
13
Q6
MDAT 12
Q7
MCK 11
Q8
64 MDAT 9
P35/SCK1 63 MCK QS 10
P34/SCK0 QS
62 FZRX
P33/RXD1
61 CRXD 8
P32/RXD0
60 FZTX
P31/TXD1
59 CTXD MR
P30/TXD0
58
VCC
57 DB15
PD7/D15
56 DB14
PD6/D14
55 DB13
PD5/D13 IC3753
54 DB12
PD4/D12 BU4094BCFV
53 16
VSS
52 DB11 1 4
PD3/D11 STR Q1
51 DB10 2 5
PD2/D10 D Q2
50 DB9 3 6
PD1/D9 CLK Q3
49 DB8 15 7
PD0/D8 OE Q4
48 DB7 14
PE7/D7 47 DB6 Q5 13
PE6/D6 Q6
46 DB5 12
PE5/D5 Q7
45 DB4 11
PE4/D4 Q8
44
VSS
43 DB3 9
PE3/D3 QS
42 DB2 10
PE2/D2 QS
41 DB1
PE1/D1
40 DB0 8
PE0/D0
39
VCC
RESET
FRMD M5V_
CBSY
MR
R3542 220k
R3543 220k
R3544 220k
R3545 220k
R3546 220k 33 128 A3
COREVDD AB3
R3547 220k MA3 34 127 A4
MA3 AB4
R3548 220k MA4 35 126 A5
MA4 AB5
R3549 220k MA2 36 125 A6
MA2 AB6
MA5 37 124 A7
MA5 AB7
MA1 38 123 A8
MA1 AB8
MA6 39 122
MA6 AB9
MA0 40 121 A9
MA7 41 MA0 AB10 120 A10
MA7 AB11
42 119 A11
MA10 AB12
L3604 43 118 A12
RCR-875D-472K MA8 AB13
44 117 A13
MA11 AB14
45 116 A14
MA9 AB15
46 115 A15
IOVDD AB16
RAS 47 114 A16
RAS AB17
WE 48 113
WE IC3551 AB18
IC3553 UCAS 49 112
UCAS S1D13504F00A000 AB19
LH61665AS-60A LCAS 50 111
LCAS AB20
1 44 51 110
VCC VSS VSS IOVDD
MD0 2 43 MD15 MD7 52 109
I/O1 I/O16 MD7 VSS
MD1 3 42 MD14 MD8 53 108
I/O2 I/O15 MD8 BUSCLK
MD2 4 41 MD13 MD6 54 107
I/O3 I/O14 MD6 TESTEN
MD3 5 40 MD12 MD9 55 106
I/O4 I/O13 MD9 SUSPEND
MD4 6 39 MD11 MD5 56 105
MD5 7 I/O5 I/O12 38 MD10 MD10 57 MD5 CLKI 104
I/O6 I/O11 MD10 VSS
MD6 8 37 MD9 MD4 58 103
I/O7 I/O10 MD4 VRTC
MD7 9 36 MD8 MD11 59 102
I/O8 I/O9 MD11 HRTC
10 35 MD3 60 101
NC NC MD3 DACRS1
MD12 61 100
MD12 DACRS0
MD2 62 99
MD2 DACWR
13 32 MD13 63 98
VCC VSS MD13 DACPO
UCAS 14 31 LCAS MD1 64 97
UW CAS MD1 COREVDD
WE 15 30
LW OE
RAS 16 29
RAS NC
MA0 17 28
A0 NC
MA1 18 27
A1 NC
MA2 19 26 MA7
A2 A7
MA3 20 25 MA6
R3510 A3 A6
MA4 21 24 MA5 3R3V_d
10k A4 A5
22 23
VCC VSS
W3551
M5V
14V
8V
M5V_
H5V_
RXF
MSTB
BYTE
M5V_
IC3652
TC74AC245FT
NBS 1 20
DIR1 VCC
DB15 2 19
A1 G
R3753 1k MSL1 DB14 3 18 SBSY SQLS_
A2 B1
R3754 1k MSL2 J3503 J3504 DB13 4 17 VRAC
A3 B2
R3755 1k MISL A9 A18 DB7 DB8 DB12 5 16 VINT
A4 B3
R3756 1k MOSL A8 A17 DB6 DB9 DB11 6 15 VDTI
A5 B4
R3757 470k VOSL A7 A16 DB5 DB10 DB10 7 14 TCON
A6 B5
R3758 1k AGRS A6 A15 DB4 DB11 DB9 8 13 EKEY
A7 B6
A5 A14 DB3 DB12 DB8 9 12 RTDT_ AFMS_
D3750 A8 B7 CTFL_
A4 A13 DB2 DB13 10 11
MA2S111 A3 A12 DB1 DB14 GND B8
A2 A11 DB0 DB15
A1 A10
A0 IC3653
HWR LRES TC74AC574FT SPS_
RESET RD 1 20
OUT EN VCC
DB0 2 19 SQLS_
D0 Q0
CSa DB1 3 18 AFMS_
D1 Q1
CSf DB2 4 17 MSTB
D2 Q2
DB3 5 16 ASTB
D3 Q3
DB4 6 15
D4 Q4
R3761 100 AMS NBLV DB5 7 14
D5 Q5
R3762 1k PHFS DB6 8 13
D6 Q6
R3763 1k P50S DB7 9 12
D7 Q7
R3764 100 MODS R3745 22k 10 11
R3740 GND CLK
R3765 1k FMNS 150
R3766 1k ACKS
IC3751 Q3751
R3767 1k CALS M62352GP XP4311
R3768 1k DSRS 11 10 4 IC3654
VCC VDD
12 9 VOGV TC74AC574FT
AO11 AO10 5 3
AFG2V 13 8 SATV 1 20
AO12 AO9 OUT EN VCC
14 7 BANV DB8 2 19
DO AO8 6 2 D0 Q0
ASTB 15 6 DRIV DB9 3 18 DSFW
LD AO7 D1 Q1
MCK 16 5 POCV 1 DB10 4 17 DSFR
CLK AO6 D2 Q2
MDAT 17 4 MIGV DB11 5 16 ESTA
DI AO5 D3 Q3
BLAV 18 3 AFG1V R3742 22k AFGV DB12 6 15
AO1 AO4 R3744 D4 Q4
BLBV 19 2 MONV DB13 7 14 SSTB
AO2 AO3 6 47 D5 Q5
20 1 – 7 DB14 8 13 SPS_
GND VSS R3743 5 D6 Q6
+ DB15 9 12
100k D7 Q7
IC321B 10 11
NJM4558M GND CLK
CIVE
CIV Q3551
DTA114EE
D3771
DAN222
VRAC
IC3655 VINT
R3776
Q3771 TC74AC08FT IC3651 VDTI
33k
2SA1576 Q3772 HWR_ 1 14 TC74AC244FT
2SC4081 BSON 1 20
ENA VDD
LWR_ 2 13 HWR 2 19
A1 ENB
CS2_ 3 18 HWR_
R3778 YB4 YA1
3 12 LWR 4 17
47k A2 B4 LWR_
CS1_ 5 16
YB3 YA2
4 11 RD 6 15
CSs_ A3 B3 RD_
IC3771 7 14
TC7W04FU RD_ 5 10 FAI 8 YB2 YA3 13
A4 B2
CSf_ 9 12 FAI_
YB1 YA4
CBSY 4 5 6 9 10 11
VSS B1
CTXD 3 6 7 8
CRXD 2 7
DSFW
DRES_ 1 8 DSDR
DSFR
DSKY_
R3780
CTFL_
1k
CS2_ RTDT_
IC3552 IC3656 DPGI_
TC7WU04FU TC74AC32FT
1 14
5 4
2 13
6 3
CSL 3 12
7 2
R3559 4 11 SBSY
39
8 1
HWR_ 5 10
6 9 MCK TCON
R3551 1M 38nS
EKEY
230mV 7 8
X3551
CSTCV26.00MXJ040
J3502
MDAT 1 2 SSTB
25mV 3 4 ESTA
0V 5 6
7 8
M5V
14V 14V
8V J641
KEY L641 220µH ETKY
START L642 220µH ETST
TO
L643 HF70ACC635050-T ET14
TUNER
L644 HF70ACC635050-T ETE
RXF
L351
2943-666663
SP J351
RX 6.5V L352
2943-666663
TX 0V
R3723
RX 0V
15k
SQLS TX 4.5V P352
R631 D631
4.7k MA2S111
J352
SSP
R634
SPE
R3724 4.7k
1k
AFMS
SENI
RL691
R3726 OMR-109F
1k J691
SPS
Q631
R691
2SC4081 10 (SEND (RL))
(ALC (EXT))
FSTB
ANTS
BSTB Q652 Q691
R651 2SD1619 UN9211
330
TRAS
Q651
DTA114EE
L670 100µH
TRV ACC (2)
UNSB
J662
L666
HF50ACC322513-B
7 6
L663 HF50ACC322513-B
VCS MSND
3 1
L664 100µH
EALC
5 4
SQSS CP671
2
L668 100µH
BANS
Q653 L669 HF50ACC322513-B
UN9211
SQSS ACC (1)
L667 100µH J661
VRAC
7 6
VINT
VDTI
3 8 1
L661 100µH
AAFO
5 4
2
L662 100µH
AMOD
R638 R635 D632 L665 100µH
4.7k 4.7k MA2S111
RTKI
DSFW
DSDR
Q632
DSFR
2SC4081
R3709 1k DSKY
R3710 1k CTFL J211
R3711 1k RTDT 3LO 3LO from PLL
unit J701
R3712 1k DPGI
L722
EXC-ELDR25C
CIV J701
(CI-V)
L723
EXC-ELDR25C
CIVE
R3706
1k
START
KEY
R3707 L681
1k J681
100µH
SKYS
Q3701
UN9211 (KEY)
SPCH