Voltage Diagram - Icom IC-7610 Service Manual

SECTION 10

VOLTAGE DIAGRAM

• DISPLAY UNIT (1/2)
5V
5V
F3R3V
F3R3V
TWCS
TWCS
TWBUSY
TWBUSY
DISPLAY UNIT
TWDTX
TWDTX
(2/2)
TWDRX D525
TWDRX
TWDCLC
TWDCLC
TWPIRQ
TWPIRQ
BKLV
BKLV
LRB706F
D523
J501 LRB706F
R521 PHE
PHE 1 C536
0
PHOR
PHOR 2
0.001
PHE 3
PHOL
PHOL 4
PHE 5 R534
PHNI 6
R522
GND 7 22k
R523 0
DASH 8
R524 1k
DOT 9
1k
R525 D524
GND 10
0
JACK UNIT
LRB706F
MIC [UP] is pushed
MIC [DN] is pushed
+8V
No key is pushed
7.9 V
2SB1132G
R581 Q581
4.7
R583
100k
Q582
L2SA1576AR
CP501
AFE
J503
SHORT1005
EP521 MICI
MICI 1
EP526 MICE
MICE 2
EP527 AFO
AFO 3
GND 4
EP522
8V 5
EP523
MUDL 6
EP524
SQLS 7
EP525
MSND 8
[POWER] [TRANSMIT]
S501
MIC UNIT
LS8J2M
R527
Pushed key
Q521
10k
TIMER
LDTC143ZE
TUNER
+8V
MAIN AF
PTT ON 3.0 V
No key is pushed
PTT OFF 0 V
FSENI
R552
R572
[TIMER] [TUNER]
S503 S504
2.2k
33k
KI0
Q571
L2SC4081
MSEND
LS8J2M LS8J2M
Q572
DSC7004S0
R575 R554
FTRAS
KI1
150 6.8k
Q573
R555
LDTA114EE [NB]
S505 S506
2.2k
Pushed key KI1
NB 0 V
LS8J2M LS8J2M
NR 0.8 V
MMZ1005B601C
SUB AF 1.6 V
No key is pushed 3.3 V
J502
MICI
MICI 1
MICE R530
RFML
MICE 2
AFO R531 1k
AFML
AFO 3
AFE 1k
AFE 4
PHOL RFSL R532
PHOL 5
1k
PHE AFSL R533
PHE 6
1k
PHOR
PHOR 7
PHE 8
MAIN UNIT (X/Y)
VLED+
VLED+
DISPLAY UNIT (2/2)
VLED–
VLED–
C451
0.1
IC451 CD4051BPWR
1 16
C453
CH I/O4 VDD
C454 100P 2 15
CH I/O6 CH I/O2
100P 3 14
COM I/O CH I/O1
C455 4 13
CH I/O7 CH I/O0
C456 100P 5 12
CH I/O5 CH I/O3
100P 6 11
INH A
7 10
VEE B
8 9
VSS C
IC301
NJM2904CRB1
8
V+ LED brightness 0% 1.6 V
GND
4 LED brightness 100% 3.3 V
PHK
Q301
2SB1132G
DSHK
R302 27k
DOTK
Q302
R303
2
L2SC4081
R301
1
15k
3
10k R304
IC301 STBV
NJM2904CRB1
3.3k
0.3 V R305
LED brightness 0% 4.4 V
0.8 V 68k
LED brightness 100% 8.9 V
3.2 V
R308
27k R309
FUDL Q303 6
R307
2SB1201 7
15k
5
10k
Q304 R310
IC301 LEDV
L2SC4081
NJM2904CRB1 3.3k
R311
68k
LED brightness 0% 1.6 V
LED brightness 100% 3.3 V
LED brightness 0% 4.1 V
LED brightness 100% 8.6 V CP101
J101
CF20
1
2
3
MAIN TX/RX
Q501 4
DS501
LDTC143ZE 5
YG
R501 6
RMDS
S502
820
HR
R502
TMDS
YGHR411
Q502
2.7k
LS8J2M LDTC143ZE
DS503 SUB TX/RX
YG
R503
RSDS
KI0 Q503
820
LDTC143ZE
0 V
HR
R504
YGHR411 TSDS
0.8 V
Q504
2.7k
LDTC143ZE
1.6 V
DS505 STBY
SML-D12D8WT86
R505
3.3 V
SBYDS
Q505
1.8k
LDTC143ZE
POWER
DS506
SMLE13BC8T
R506
PWRDS
Q506
3.9k
LDTC143ZE
TIMER
DS507
B1931TX R507
TMRDS
Q507
4.7k
LDTC143ZE
[NR] TUNE
DS508
SML-D12U8WT86
R508
TUNEDS
Q508
2.7k
LDTC143ZE
TUNER ON
DS509
B1931TX
R509
TUONDS
Q509
4.7k
LDTC143ZE
DS510 NR
B1931TX
R510
[MENU]
NRDS
J504
Q510 S601
4.7k
LDTC143ZE
10 3R3V
DS511 NB
9 RFML
B1931TX
AFML
8 R511
NBDS
7 AFMK
Q511 LS8J2M
4.7k
6 RFSL
LDTC143ZE
5 AFSL
SD Access
DS512
4 AFSK
SMLE13BC8T
3 GND R512
SDDS
2 VLED+
Q512
1 VLED– 3.9k
LDTC143ZE
VR UNIT
R557
15k
FSQS
10-1
C452
0.1
IC452 CD4051BPWR
1 16
CH I/O4 VDD
2 15
CH I/O6 CH I/O2
3 14
COM I/O CH I/O1
4 13
CH I/O7 CH I/O0
5 12
CH I/O5 CH I/O3
6 11
INH A
7 10
VEE B
8 9
VSS C
Pushed key KI6
SPLIT 0 V
DUAL-W 0.8 V
No key is pushed 3.3 V
EP101 C115
MMZ1005S601CT
100P
C114
100P
LEDV 1 48 TWDRX
P03 PE3
2 47 TWDCLC
VCL PE4
3 46
FINED TWPIRQ
MD PE5
4 45
XCIN PA0
5 44 RITAK
XCOUT PA1
FRES 6 43 RITBK
RES# PA3
7 42 MAINDBK
P37/XTAL PA4
8 IC101 41 MAINDAK
0.1 VSS PA6
9 40
P36/EXTAL R5F52103BDFM VSS
10 39 TRSK
VCC PB0
C101 11 38
C102
P35 VCC
12 37
MSCK
P32 PB1
13 36 0.1
QUICKK
P31 PB3
14 35
FLRXD XFCK
P30 PB5
PHK 15 34 CHGK
P27 PB6
FLTXD 16 33
P26 PB7
R108 C112
47k 100P
R109 C111
4.7k 100P
FINED
UB C109
R110
FRES C110 100P
100P 47k
R111
47k
clockwise counterclockwise
3.1 V
MAINDAK,
RITAK
0 V
3.1 V
MAINDBK,
RITBK
0 V
C401 C402
0.1 0.1
MC74HC4094ADTR2G
MC74HC4094ADTR2G
1 16 1 16
STR V+ STR V+
2 15 2 15
D OE D OE
3 14 3 14
CLK Q5 CLK Q5
4 13 4 13
Q1 Q6 Q1 Q6
5 12 5 12
Q2 Q7 Q2 Q7
6 11 6 11
Q3 Q8 Q3 Q8
7 10 7 10
Q4 Q'S Q4 Q'S
8 9 8 9
GND QS GND QS
IC401 IC402
QUICKK
R605
6.8k
R601 R602 R603
6.8k
2.2k 4.7k
[M.SCOPE] [MP-W] [MP-R] [AUTO TUNE] [QUICK]
S602 S603 S604 S605 S607
LS8J2M LS8J2M LS8J2M LS8J2M LS8J2M
Pushed key KI2
MP-W 0 V
MP-R 0.8 V
AUTO TUNE 1.7 V
No key is pushed 3.3 V
J771
1
2
3
4
GND
5
MFDBK R771 MFDBK
6
1k [1.8] [3.5]
NC
7
MFK R772 MFK S701 S702
8
MFDAK R773 1k MFDAK
9
1k GND
10
MULTI UNIT
R713 LS8J2M LS8J2M
6.8k
R714
2.2k
[10] [14]
[SPLIT] [DUAL-W]
KI6 S704 S705
S713 S714
LS8J2M LS8J2M
LS8J2M LS8J2M
Pushed key KI3
[21] [24]
S707 S708
1.8 0 V
10 0.8 V
21 1.7 V
LS8J2M LS8J2M
GENE 2.5 V
No key is pushed 3.3 V
[GENE] [50]
XFCK [XFC] S710 S711
S715
LS8J2M LS8J2M
LS8J2M
Pushed key KI4 MAIN MAIN
[CHANGE] TRACKING
CHGK LDPS
S716 3.5 0 V
C113
14 0.8 V
100P
24 1.7 V
LS8J2M
50 2.5 V
No key is pushed 3.3 V
LDTC143ZE LDTC143ZE
MAIN UNIT (X/Y)SENSOR Q751 Q752
J702
1 5V
R722
2 MAINDBK
47k
R724
3 MAINDAK
47k
4 GND
5V
3.1 V
0 V
R845
3.1 V [RIT]
S843
2.2k
KI9
0 V
LS8J2M
C403
0.1
MC74HC4094ADTR2G
1 16
STR V+
2 15
D OE
3 14
CLK Q5
4 13
Q1 Q6
5 12
Q2 Q7
6 11
Q3 Q8
7 10
Q4 Q'S
8 9
GND QS
IC403
R606 R607 R608
2.2k 4.7k 15k
+8V
[EXIT] [REC] [PLAY] [SPEECH/LOCK]
S608 S609 S610 S611
FSENI
LS8J2M LS8J2M LS8J2M LS8J2M
Pushed key KI7 Pushed key KI9
EXIT 0 V RIT 0 V FTRAS
REC 0.8 V TX 0.8 V
PLAY 1.7 V CLEAR 1.7 V
SPEECH/LOCK 2.5 V No key is pushed 3.3 V
No key is pushed 3.3 V
* Refer to the PARTS LIST for the value and name of component.
5V
HV
J801
1 GND
R801
2 PBBAK
[7] 1k
R802
3 PBBBK
S703 R803 1k
4 PBAAK
R804 1k
5 PBABK
EP802 1k
6 PBTK
MMZ1005B601C
7 3R3V
R805
8 KSPDL
1k
LS8J2M R806
9 PTCHL
1k
10 GND
PBT UNIT
[18]
S706
Pushed key KI8
LS8J2M
PBT 0 V
FILTER 0.8 V
[28] [FILTER]
APF/TPF 1.7 V
S709 S841
No key is pushed 3.3 V
Pushed key KI5
LS8J2M LS8J2M
7 0 V
18 0.8 V
[MAIN/SUB] [APF/TPF]
S712 S842
28 1.7 V
MAIN/SUB 2.5 V
No key is pushed 3.3 V
LS8J2M LS8J2M
SUB SUB PBT FILTER APF/TPF
TRACKING
LDTC143ZE LDTC143ZE LDTC143ZE LDTC143ZE
Q753 Q754 Q861 Q862
Q863
LDTC143ZE
5.0 V
13.5 V
R846
[ TX] [CLEAR]
S844 S845
4.7k
C907
0.1
C906
3.3 V
LS8J2M LS8J2M
0.1
C905
C824
0.1
0.1
R829
J821
47k
1 5V
RITBK_
2 RITBK
RITAK_
3 RITAK
4 GND
RIT UNIT
R830
47k
J902
F3R3V F3R3V
1 2
F3R3V NC
3 4
5V 5V
5 6
7.9 V
5V 5V
7 8
NC HV
9 10
HV NC
EP904 11 12
+8V +8V
13 14
NC GND
MPZ1608S601A 15 16
GND GND
17 18
FLTXD R901 FLTXD FLRXD R903 FLRXD
19 20
22 GND FRES R904 22 FRES
21 22
R902
PWRK PWRK GND 100
23 24
100 FSENI FTRAS
25 26
GND GND
27 28
3.3 V
GND GND
29
30
MAIN UNIT (1/11)