Icom IC-T70A Service Manual page 36

SECTION 10. VOLTAGE DIAGRAM
MAIN UNIT (1/4)
R825
SP1 J1 4.7
2 2 R826 C11
1 1
4.7
220
J2 R827
SDRS-3650P-008A
0
4.7
MMZ1608Y121B T
C9
EP4 R6
R1
220
0
J3 EP3
C72
MMZ1005Y102CT
47P
MMZ1608Y121BT
Q1
LDTC144TE
1.57V I C800
1
2
3
4
NJM2746V
Q11 1.57V 1.56V
UNR911FG0 R803
1k
R805
330k
C953
1
L1SS400
R801 330k
D800
C800
EM6022P
D2 0.01
MC1
VC040205X150 R813
C14
R811 0.22 2.2k
0
Q7
LDTC144TE
R75
10k
MMZ1005Y102CT
C15
OPT EP6
R4
22
Q4
2SA1832
J4 MIC EP5 470 R76
2.2k
MMZ1005Y102CT
MMZ1005Y102CT
CHG
R102
R100
330k
330k
R103
R101 120k
120k
13.50V(EXT)
MPZ1608S101A
J100 MPZ1608S101A
D100
EP100 EP104
RB050LA 13.18V(EXT)
*C101 *C105
7.20V(BAT)
D101
MA2S7280G
MPZ2012S331A
R104
33k
C107
0.001
7.20V
MPZ1608S101A
CP100 EP102
BATT +
C104 Q100
C102
0.18
0.001 TPCF8104 R105
0.001
VCC
0.18
CP101 R106
BATT - 0.18
EP103
R108
MPZ1608S101A
C106
2P C108
C109
10
0.001
CP102 EP505
BTSENC
MMZ1005Y102CT
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BTL5V
2.73V
2.73V
TPA0211DGN
VO+ BYPASS
5 4
SE/BTL VDD
6 3
GND SHUTDOWN
7 2
VO- IN
8 1
IC1
5.00V
C803
8
2.03V 0.018
7 0.1
6 C805
5 C801
C951
0.1
0.22
2.05V
0.047 C17
C13 0.0047
R807
R814 56k
15k
2.02V
R820
R800
100k
1M
R126
C116
R128
0.001
12
12
R115
12
8.44V(CHG) 11.72V(CHG)
Q102
XP1501
4.41V(CHG)
4.96V(CHG)
D102
R116
R121
1.5k
SB07-03C
8.08V(CHG)
1k
R119 4.35V(CHG)
R118 3.3k
R120 C124
3.3k
330 0.001 0.66V(EXT)
L1SS400
D103 D104 R122
MAZ8082GM 10k
C118
R130
C117
0.001 47k
0.001
12.93V(EXT)
5.02V
D108
SW5V
L1SS400
D106
L1SS400
R132
10k
R109 C114
100P
120k
RX:0.59V
2SA1832
I C102 TX:7.17V
Q103
R111
1 8
D107
2 7
1M
MAZ8051GM
3 6 RX:7.17V
C121
C120 0.001
4 5
TX:6.50V 0.001
LM2904PWR
C115
R110 R124
1M
0.001
470k 0.001 10k
R114
C119 R123 D111
L1SS400
470k
RX:7.17 V
R113
TX:0V
120k
Q104
C122
LDTC144EE
0.001
10 - 1
5.45V 7.18V
4.7
R46
6.55V
4.7
R47
4.7
Q6
XP1501
R48
4.48V
4.97V
5.14V
R43
5VS
10k
R16
18k
2.49V 2.50V
2.50V
2.50V IC2
5.00V 1 14
2 13
3 12
4 11
2.48V 5 10
6 9
7 8
2.50V 2.50V
LMV324IPW
2.27V
2.27V
R821 R812
100k 100k
13.38V(EXT)
R129
12
12.59V(CHG)
0V(EXT)
4.96V(BAT)
R131
1k
Q107
2SC4738
C125
C126
0.001 0.001
VIN
BTVIN
CPU5
VCC
7.18V
R635
BTSENC
2SB1132
6.50V
Q109 1k
Q108
XP1501
5.01V
5VS
VCC-I
TXI-V
4.99V
R589
4.41V
1k
Q110
LDTC144EE
4.7k
R134
*: Refer to the PARTS LIST for the value and name of component.
R36
100
13 VIN6
VDAREF1
14
VDAREF2
15
R26 RESET R2A20178
2.47V 16
R37 GND
C41
27k 17
VIN7
2.48V 18
0.1
470k
RMOD
2.50V
S251 S255 S259 S265
KEY
KEY KEY KEY
D251
S252 L1SS400
S256 S260 S266
KEY
KEY KEY KEY
D252
S253
S257 S261 S267 L1SS400
KEY
KEY KEY KEY
D259
S262 L1SS400
S263 S264 S268
BTDET
KEY
KEY KEY KEY
D260
L1SS400
PCON
T5C
VCC
5VS
R33
C47
4.7k 1
AFSTBY
CLOUT
CLIN
MMUTE
PS5
CTCOUT
VCOMOD
BPF3
BPF1
5VS
VIN3
6
DADI
DI
5
DACLK
CLK
4 DALD
LD
3
IC5 VDD
2
VIN2
1
BPF2
REFCON
REFMOD
VOX
INTMIC
INTPTT
5VS
EXTPTT
5VS
T5
R5
PS5
S270
TP70D974E20
COM
DICK2 4
B
DIUD2 6
A
5
COM
D ICK 1
B
DIUD 3
A
2
KS4
KS3
KS2
KS1
KS0
S269
PWR
KEY
KR3
KR2
KR1
KR0