Main Unit (2) - Icom IC-756PRO Service Manual

10-5 MAIN UNIT (2)

BUS LINE
14V
14V
T8V
T8V
H5V
H5V
8V
8V
M5V
M5V
R8V
R8V
TRV OFF TX 8.0V
EXCEPT 0V -5V
-5V
HV
HV
3R3V
Q622
UMH11N Q611 Q601
RX 0V 2SD1619 2SD1619
Q621
4 TX 8.0V
2SA1577
5 3
R622 D611 D601
DA221 DA221
1.5k Q612 R612 Q602 R602
6 2 2SC4081 1k 2SC4081 1k
R621
1 47k
RX 0V
7.8V R613 R603
TRV ON 0V TX 4.4V
10k 10k
TRV OFF 4.8V
14V RX 0V
TX 4.4V
Z1
MOSL
VOSL
3R3V L3001 10uH CW KEY DOWN
L3002 100uH SIDE TONE LIMIT:OFF
800mV
W3010
0V
DTAF
VRAC
2.45mS
VINT
RECI
MCK
IC3005
BU4053BCFV
IC3001
ISD33120S
16
VCS 1 28 12 14
SS SCLK XO X
MDAT 2 27 13
MOSI VCCD X1
3 26 2 15
R3025 MISO XCLK Y0 Y
4 25 1
10k VSDD INT Y1
VX2 5 24 5 4
NC RAC Z0 Z
6 23 3
MAIN(1) NC VSSA Z1
7 22 6
NC NC INH
8 21 11
NC NC A
R3026 9 20 10
NC NC B
1.5M 10 19 9
W3001 NC NC C3004 C
11 18
R3027 VSSA VCCA 1
12 17 7 8
82k VSSA ANAIN+
VX1 6 13 16
7 AUDOUT ANAIN-
5 14 15
C3008 AMCAP NC
4.7
IC3004B
NJM4558M
VDTI
R3019 C3032
220 W3014 0.1
R3015
120k
R3016
IC3004A 100k
NJM4558M R3042
R3013 8
3 1 2.2k
10k +
2 -
4
R3021
M5V 220
RECO
C3030
0.1
IC3002 C3018 C3019
BU40538CFV
10 10
16
MICI 12 14
XO X IC3003
13
X1 R3020 M5282FP
2 15
R3005 Y0 Y 47k
1 1 10
1K Y1 VCC2 VCC
5 4 2 9
Z0 Z IN+ VCAOUT
AMPO 3 3 8
Z1 IN- CTL
6 4 7
INH OUT VCAIN
MISL 11 R3034 5 6
A GND NC
MICE 10 1.2k
B C3020
9
C 10
7 8 C3017
10
C3031
0.1
8V
VOGV
-5V
MICO
3R3V_d
3R3V_d
10 - 5
M5V
14V
RXS
H5V
8V
L3602 HF50ACC322513-B L3603 RCR-875D-472K
M5V M5V
FZRS
-5V
HV FZVP
D3601 MA2S111 R3601 1k R3602 47k
UNLC
CON0
CON1
CON2 UNLC_ R3502
PSTB 47k
L3601
PSEL
HF50ACC322513-B
H5V H5V
Q3002
DTA114EE
TMD R3603 2.2k TMD
LFMD R3604 1k LRXD
LMFD R3605 1k LTXD
ISTA R3608 1k ISTA
IKEY R3609 1k IKEY_
TRVI R3612 1k TRVI_ 103
AVCC
104
VREF
SCPL 105
P40/AN0
VOXL 106
P41/AN1
AVXL 107
P42/AN2
RXS R3617 1k RXS_ ASO0_ 108
P43/AN3
TXS R3618 1k TXS_ ASO1_ 109
P44/AN4
ASO2_ 110
P45/AN5
STON_ 111
P46/AN6/DA0
BEEP_ 112
P47/AN7/DA1
113
AVSS
BEEP R3625 1k BEEP_ 114
VSS
SENI 115
C323 P17/PO15/TIOCB2
8V PWRS_ 116
0.001 P16/PO14/TIOCA2
CCS 117
IC321A P15/PO13/TIOCB1
CWR 118
NJM4558M 8 2 R323 R322 C322 P14/PO12/TIOCA1
ECS 119
STON 1 - 120k 120k 0.0047 P13/PO11/TIOCD0
+ 3 STON_ IDTI 120
P12/PO10/TIOCC0
4 IDTO 121
R3626 P11/PO9/TIOCB0
1k ICK 122
P10/PO8/TIOCA0
C325 123
0.1 MD0
-5V 124
MD1
FZMD FZMD 125
MD2
8V TRAS 126
PG0/CAS
SENI CS3 127
PG1/CS3
TRAS CS2 128
PG2/CS2
SCPL R3637 1k SCPL CS1
VOXL C3638 0.1 R3638 1k VOXL CS0
AVXL R3639 1k AVXL R3501
47k
R3640 1k ASO0
R3641 1k ASO1_
R3642 1k ASO2_ R3543 220k
IC3631 ASL R3542 220k
BU4053BCFV
R3541 220k
FORL 1 16 R3540 220k
Y1 VDD
NSQ0 2 15 R3539 220k
Y0 Y
REFL 3 14 R3538 220k
Z1 X ALCL
4 13 R3650 4.7k R3537 220k
Z X1 SML
FMTL 5 12 R3649 4.7k R3536 220k
Z0 X0
6 11 R3535 220k
INH A
7 10 R3534 220k
VEE B
8 9 R3533 220k
VSS C
D3508 1SS372 R3532 220k
R3531 220k
SML C3631
0.0047
ALCL M5V_
R3647 D3509
1SS372 8V_
1k
PWRK H5V_
R3648
47k IC3503
X25320SI-2.7
R3645 IDTO 5 SI 4
R3643 47k VSS
M5V_ ICK 6 SCK 3 3
1k WP
SKYS SKYS 7 HOLD 2
SO
RTKI RTKI 8 VCC 1
CS
R3644
1k ECS
IDTI
CCS
CWR
3R3V_d
B R3572 39k FPDAT14 FZRS
R3573 20k FPDAT8
R3506
R3574 10k FPDAT7
4.7k
R3575 10k FPDAT6 H5V_
R3576 10k
FPDAT11
G R3582 39k
FPDAT5
R3583 20k
FPDAT4
R3584 10k IC3502
FPDAT3 S-80942ANMP-DD6
R3585 10k
R3505
R3586 10k W3504 1 5
HV 33k OUT CD
HV 2
FPDAT9 VDD
R R3592 39k 3 4
FPDAT2 VSS NC
R3593 20k
FPDAT1
R3594 10k
FPDAT0
R3595 10k
R3596 10k
HSYNC
HSYNC
VSYNC
VSYNC
M5V
14V
RXS
8V
M5V_
DRES_
C3501
12p
J3503 J3504
FZRS
C3502
A9 A18 D7 D8
12p
A8 A17 D6 D9
A7 A16 D5 D10
A6 A15 D4 D11
A5 A14 D3 D12
A4 A13 D2 D13
A3 A12 D1 D14
A2 A11 D0 D15
A1 A10
A0
HWR
RESET RD
64 MDAT BYTE
P35/SCK1
63 MCK VCC CS0
P34/SCK0
62 FZRX VCC CS3
P33/RXD1
61 CRXD
P32/RXD0
60 FZTX
P31/TXD1
59 CTXD to MEMORY to MEMORY board J2
P30/TXD0 board J1
58 8V
VCC
57 D15
PD7/D15 R3740 IC3751
56 D14 150
PD6/D14 M62352GP
55 D13
PD5/D13
54 D12 11 10
PD4/D12 VCC VDD
53 12 9 VOGV
VSS AO11 AO10
52 D11 13 8 SATV
IC3501 PD3/D11 AO12 AO9
HD64F2357F20 51 D10 14 7 BANV
PD2/D10 DO AO8
50 D9 ASTB 15 6 DRIV
PD1/D9 LD AO7
49 D8 MCK 16 5 POCV
PD0/D8 CLK AO6
48 D7 MDAT 17 4 MIGV
PE7/D7 DI AO5
47 D6 18 3 AFGV
PE6/D6 AO1 AO4
46 D5 19 2 MONV
PE5/D5 AO2 AO3
45 D4 20 1
PE4/D4 GND VSS
44
VSS
43 D3
PE3/D3
42 D2 BLBV
PE2/D2
41 D1 BLAV
PE1/D1
40 D0
PE0/D0
39
VCC
FRMD
R3503
47k
33
COREVDD
R3549 220k MA3 34
MA3
R3548 220k MA4 35
MA4
R3547 220k MA2 36
MA2
R3546 220k MA5 37
MEASUREMENTCONDITIONS MA5
R3545 220k VOLTMETER :50kΩ/VDC MA1 38
MA1
R3544 220k OSCILLOSCOPE :20MHz MA6 39
MA6
DISPLAY :14.1MHz USB MA0 40
MA0
MA7 41
MA7
42
MA10
43
MA8
M5V_ 44
MA11
45
MA9
8V 46
IOVDD
H5V_ RAS 47
RAS
WE 48
WE
L3604 C3555 0.01 UCAS 49
UCAS
RCR-875D-472K LCAS 50
IC3553 LCAS
C3558 100 51
LH61665AS-60A VSS
C3556 0.01 MD7 52
MD7
1 VSS 44 MD8 53
VCC MD8
MD0 2 I/O16 43 MD15 MD6 54
I/O1 MD6
MD1 3 I/O15 42 MD14 MD9 55
I/O2 MD9
IC3504 MD2 4 I/O14 41 MD13 MD5 56
RTC-4553A I/O3 MD5
MD3 5 I/O13 40 MD12 MD10 57
I/O4 MD10
1 14 MD4 6 I/O12 39 MD11 MD4 58
GND TPOUT I/O5 MD4
2 13 MD5 7 I/O11 38 MD10 MD11 59
WR SOUT I/O6 MD11
3 12 MD6 8 I/O10 37 MD9 MD3 60
SIN CS1 I/O7 MD3
4 11 MD7 9 I/O9 36 MD8 MD12 61
SCK CS0 I/O8 MD12
5 10 10 NC 35 MD2 62
L1 L5 NC MD2
6 9 MD13 63
L2 L4 C3557 0.01 MD13
7 8 MD1 64
L3 VDD MD1
13 VSS 32
Q3504 VCC
2SA1162 UCAS 14 CAS 31 LCAS
OW
WE 15 OE 30
LW
RAS 16 NC 29
C3509 RAS
0.01 MA0 17 NC 28
A0
MA1 18 NC 27
A1
MA2 19 A7 26 MA7
A2
MA3 20 A6 25 MA6
Q3505 A3
MA4 21 A5 24 MA5
DTC144EE R3510 A4
22 VSS 23
10k VCC
C3552
0.01
M5V
14V
RXS
8V
H5V
M5V_
16
1 4 R3751 1k NBS
STR Q1
MDAT 2 5 R3752 1k NBLS R3651
D Q2
MCK 3 6 R3753 1k MSL1 100k
CLK Q3
15 7 R3754 1k MSL2 IC3651
OE Q4 TC74AC244FT
14 R3755 1k MISL
Q5
13 R3756 1k MOSL BSON 1 20
Q6 ENA VDD
12 R3757 1k VOSL HWR_ 2 19
Q7 A1 ENB
11 R3758 1k AGRS CS2 3 18
Q8 YB4 YA1
9 LWR_ 4 17
QS A2 B4
10 CS1 5 16
QS YB3 YA2
RD_ 6 15
A3 B3
8 CS0 7 14
YB2 YA3
IC3752 FAI_ 8 13
BU4094BCFV A4 B2
MR CS3 9 12
YB1 YA4
10 11
VSS B1
16
1 4 R3761 100 AMS
STR Q1
2 5 R3762 1k PHFS M5V_
D Q2
3 6 R3763 1k P50S
CLK Q3
15 7 R3764 100 MODS IC3655
OE Q4 TC74AC08FS
14 R3765 1k FMNS
Q5 HWR_ 1
13 R3766 1k ACKS
Q6
12 R3767 1k CALS
Q7 LWR_ 2
11 R3768 1k DSRS
Q8
9
QS 3
10
QS
4
8
IC3753 RD 5
BU4094BCFV
6
7
ASTB
C3655
2p
M5V_
M5V_ D3771
DAN222
H5V_
IC3656
CIV TC74AC32FT
CS2 1
R3776
Q3771 33k
2
2SA1576
Q3772
2SC4081 CSL 3
128 A3
AB3 R3778 4
127 A4
AB4 47k
126 A5 CIVE
AB5 HWR_ 5
125 A6
AB6
124 A7
AB7 IC3771 6
123 A8
AB8 TC7W04FU
122
AB9 7
121 A9
AB10 4
120 A10 5
AB11
119 A11
AB12 CTXD 3
118 A12 6
AB13 R3780
117 A13
AB14 CRXD 2 1k
116 A14 7
AB15
115 A15
AB16 DRES_ 1
114 A16 8 SBSY
IC3551 AB17
113
SED1354F0A AB18 CBSY
112 DSFW
AB19
111 DSDR
AB20 C3770
110 DSFR
IOVDD 0.0047
109 DSKY
VSS
108 FAI_ CTFL
BUSCLK
107 RTDT
TESTEN
106 IC3552 DPGI
SUSPEND TC7WU04FU
105 Q3551
CLKI DTA114EE
104
VSS 4
103 5
VRTC
102 M5V_
HRTC 3
101 6
DACRS1
100
DACRS0 2
99 7 38nS
DACWR
98
DACPO 1
97 8 230mV
COREVDD
CP3004 TCON
EKEY
R3551
MCK
1M 25mV
CP3005 CP3007 CP3002
0V
J3502
3R3V X3551
CSTCV26.00MXJ040
CP3001 MDAT 1 2 SSTB
R3727 1k
H5V_ CP3003 3 4
M5V_ 5 6
7 8 ESTA
CP3006
CP3008
M5V
KEY L641 220uH
14V START L642 220uH
RXS
8V
M5V_
RX 6.5V
TX 0V
RX 0V IC215
AN78L08M
TX 4.4V
SENI I O
IC3652 G
TC74AC245FT
1 20
DIR1 VCC
D15 2 19
A1 G
D14 3 18 SBSY
A2 B1
D13 4 17 VRAC
A3 B2
D12 5 16 VINT
A4 B3
HWR_ D11 6 15 VDTI
A5 B4
D10 7 14 TCON
A6 B5
LWR_ D9 8 13 EKEY R691
A7 B6 10
D8 9 12 RTDT
A8 B7
RD 10 11 CTFL
GND B8 Q631 Q632
2SC4081 2SC4081
FAI
RDP
RL691
OMR-109F
LRES
IC3653
TC74AC574FT Q691
SSP DTC114EE
LRES 1 20 M5V_
OUT EN OUT EN VCC VCC
D0 2 19 SQLS
14 D0 D0 Q0 Q0
D1 3 18 AFMS
D1 D1 Q1 Q1 CP352
D2 4 17 MSTB
13 D2 D2 Q2 Q2 CP354 CP351
D3 5 16 ASTB
D3 D3 Q3 Q3 FSTB CP353
D4 6 15 FSTB
12 D4 D4 Q4 Q4 ANTS
D5 7 14 ANTS
D5 D5 Q5 Q5 BSTB
D6 8 13 BSTB
11 D6 D6 Q6 Q6 RANS SPE
D7 9 12 RANS
D7 D7 Q7 Q7
10 11
10 GND GND CLK CLK SQLS SQLS TRAS
R3723 15k
Q652
9 C3652 AFMS AFMS 2SD1619
R3724 1k Q651
0.01
DTA114EE
8
IC3654
TC74AC574FT
TRV L670 100uH ACC(2)
LRES 1 20
OUT EN OUT EN VCC
D8 2 19 UNSB UNSB
D0 D0 Q0
D9 3 18 DSFW
D1 D1 Q1 L666 HF50ACC322513-B
M5V_ D10 4 17 DSFR 7
D2 D2 Q2
D11 5 16 ESTA
D3 D3 Q3 MSND L663 HF50ACC322513-B
D12 6 15 VCS
D4 D4 Q4 3
D13 7 14 SSTB
D5 D5 Q5 EALC L664 100uH
D14 8 13 SPS
14 D6 D6 Q6 5
D15 9 12 SQSS SQSS
D7 D7 Q7 CP669 CP668 2
10 11
13 GND GND CLK
SPS SPS BANV L668 100uH
12 C3653
R3726
0.01
1k
11 L669 HF50ACC322513-B
10 SQSS L667 100uH ACC(1)
9
Q653 CP667 7
8 DTC114EE
VRAC VRAC
CP661
VINT VINT
3 8
VDTI VDTI
AAFO L661 100uH
VCS VCS
5
2
DRES
AMOD L662 100uH
DSFW L665 100uH
DSDR
DSFR
R3709 1k DSKY
R3710 1k CTFL
R3711 1k RTDT
R3712 1k DPGI
3LO
CP701
CIV
R3706 CP702
1k
START
CIVE
KEY
R3707
1k
Q3701 SKYS
DTC114EE
SPCH
MAIN UNIT
J641
ETKY
ETST
ET14 to EXT TUNER
ETE
J203
DSPF
to DSP
board MF1
J691
(SEND(RL))
(ALC(EXT))
CP692
J351
(EXT SP)
J352
SSP
to DISPLAY
SPE board J451
6
1
4
6
1
4
J211
3LO from PLL
unit J701
J701
(CI-V)
L681
100uH
J681
(KEY)
CP682