Icom IC-T7H Service Manual

SECTION 11 VOLTAGE DIAGRAM
11 - 1
• LOGIC UNIT
SEG31 SEG30 SEG29 SEG28 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10
SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 SEG0
S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31
S32 S33 S34 S35 S36 S37 S38 S39 S40 S41 S42 S43 S44 S45
S46 S47 S48 S49 S50 S51 S52 C1 C2 C3 C4
1 2 3 4 5 6 7 8 9
11 12 13 14 15 16 17 18 19 10 20 21 22 23 24 25 26 27 28 29 35 36 30 31 32 33 34
DS4 LD-BU4323J
COM0 COM1 COM2 COM3
CLONEOUT
CLONEIN
D1 MA2S111
Q1 UN9210
R2
15 k
VIN
REMOTE
C212 0.001
C213 0.001
C214 0.001
C215 0.001
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
J1 08-6210-030-800
AF
MOD
PLCK
UR3
LVCO
+3C
800
300
PLST
DICK
DIUD
VR3
REMOTE
PDA/UL
C211 0.001
C166
0.001
C167
0.001
SP1
CS028014-12
R221
330 k
R222
68 k
VCC
+3C
C209
0.001
R11
10 k
C21
0.1
C18
0.001
D3 MA2S111
R12
10 k
C22
0.001
321
5
Q4 XP1501 AB
C19
0.01
C168
0.001
Q5
2SB1132 R
C17
100
R224
1 M
R207
220 k
C20
22
C23
47
IC2 S-81335HG-KI
R190
4.7 k
1
VDD
2
VSS
3
NC
4
NC
5
IC3
S-80730SL-AT
C15
0.001
AFON AM UR3 H/L 300 800
C157 0.1
Q42 UN9211
D19
MA2S111
+3CPU
+3C
P67/AN7 P66/AN6 P65/AN5 P64/AN4 P63/SCLK22/AN3 P62/SCLK/21AN2 P61/SOUT2/AN1 P60/SIN2/AN0
1 2 3 4 5 6 7 8
P57/ADT/DA2
9
P56/DA1
10
P55/CNTR1
11
P54/CNTR0
12
P53/RTP1
13
P52/RTP0
14
P51/PWM1
15
P50/PWM0
16
P47/SRDY1
17
P46/SLCK1
18
P45/TXD
19
P44/RXD
20
P43/ /TOUR
21
P42/INT2
22
P41/INT1 P40 P77
23 24 25
VL1
100
C1
99
C2
98
VL2
97
VL3
96
COM0
95
COM1
94
COM2
93
COM3
92
AVSS
91
VREF
90
VCC
89
SEG0
88
SEG1
87
SEG2
86
SEG3
85
SEG4
84
SEG5
83
SEG6
82
SEG7
81
SEG8
80
SEG9
79
SEG10
78
SEG11
77
SEG12
76
P76
26
P75
27
P74
28
P73
29
P72
30
P71
31
P70/INT0
32
RESET
33
XCIN
34
XCOUT
35
XIN
36
XOUT
37
VSS
38
P27
39
P26
40
P25
41
P24
42
P23
43
P22
44
P21
45
P20
46
P17
47
P16
48
P15/SEG39
49
P14/SEG38
50
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75
IC1
M38267M8L-219GP [USA-3]
M38267M8L-155GP [Other]
C5
0.001
R210
10 k
C6
0.1
R230
100 k
CONT
C210
0.001
R197
47 k
R209
47 k
SEG12
SEG11
COM3
COM2
RESET
VR3
LVCO
MM/RM
BLED
I1
I2
KR0
KR3
SHIFT
HVCO
TXSEL
MICC
LIGHT
PTT
CFC
C156
27 P
X1
CR-534
R220
10 k
C155
24 P
ESIO
Q40
UN9213
CS
1
SO
2
WP
3
VSS
4
SI
5
SCK
6
HOLD
7
VCC
8
IC15 X25080SI-2.7
PCON
R205
100 k
R234
1 M
ESIO
C87
0.001
C203
0.001
R233
1 M
Q45
UN9115
R187
1 M
R186
470 k
C208
0.001
HVCO
DETO
NOISE
GND
GND
H/L
SD
TXSEL
C200 0.001
C201 0.001
C202 0.001
C216 0.001
C217 0.001
R216
1 M
R211
470 k
R215
82 k
R214
82 k
R213
82 k
1
5678
IC13 NJM2904M
R241
100 k
C181
0.01
C180
0.1
C172
0.1
R219
2.2 M
C173
0.0022
C169
0.0015
C170
0.1
C171
0.039
C179
100 P
R183
100
DS3
LT1EP53A
R240
120 k
R242
470 k
C178
0.1
R208
100
R184
100
DS2
LNJ310M6URA
DS1
LNJ310M6URA
R185
100
Q36
UN9215
Q44
UN9215
Q34
UN9215
Q35
UN9215
ECS
ECK
DIUD
DICK
POWER
I3
CONT
KS0
KS2
KS3
KS1
KS4
CLONEIN
CLONEOUT
C204
0.001
R223
4.7 k
C205
0.001
C174 0.01
C175 0.1
CTCIN
VIN
CTCOUT
NOISE
LOCK
KS1 KS0 KS2 KS3 KS4
DTMF
PCON
PDA/UL
PLST
SD
ECS
PLCK /ECK
R198
47 k
R301
10 k
R311
10 k
R321
10 k
R331
10 k
LOCK
LOCK
KR3
S6
POWER
S1
SSSS812-B-1
R200
470 k
R10
10 k
KR3
R231
220 k
R235
220 k
R236
220 k
R237
220 k
R238
220 k
Q10 2SJ364 Q
R38
1 M
R181
470 k
C154
0.047
R41
4.7 k
CTCIN
CTCOUT
PCON
DTMF
+3C
MM/RM
MICC
C36
0.047
C42
0.001
R218
100 k
C44
0.01
C45
0.01
C43
0.1
R48
390 k
R44
8.2 k
R43
39 k
R42
39 k
C40
0.001
C41
0.0022
R45 2.2 k
R46 15 k
1
23
456
Q12
XP6501 AB
R47
150 k
R152
56 k
C146
0.0022
EXTMIC
AF
MOD
R162
100
R159
27 k
R153
56 k
C136
0.22
R146
470
1
2
3
4
6
5
7
8
IC12
BA4510F
R149
100
C142
0.001
R151
18 k
C145
0.0047
C143
120 P
MICC
Q30 UN9115
R154
180 k
R161 10
C207
0.001
C149
47
R148
6.8 k
C147
560 P
Q31 UN9211
MM/RM
MICC
R140
33 k
C130
470 P
C131
0.01
D4 MA8051 H
R196
100 k
R147
47 k
MC1
EM-123TH
C206
0.001
BAND1
BAND2
BAND3
BAND4 TXFH
RXF2
TXFL
D14
D11
KR0
KR1
KR2
I1
I2
I3
KS0
KS1
KS2
C93
0.001
C92
0.001
C81
0.001
C80
0.001
TENKEY
2
5
H/L
D8
MA6S121
KR2 KR1 KR0
KSD4
KSD3
KR0
KR1
KR2
C91
0.001
VFO
MR
1
4
TONEMONI
KR3
R335
10 k
R325
10 k
R336
10 k
R307
10 k
R305
10 k
R304
10 k
R303
10 k
R302
10 k
R315
10 k
R316
10 k
R319
10 k
R309
10 k
7
.
8
0
D7 MA2S111
D6 MA2S111
KSD1
KSD0
CALL
S.MW
D15
D12
D16
MA2S111
KS3
KS4
C84
0.001
C83
0.001
C82
0.001
D17
MA2S111
R144
10 k
R142
1 k
AF
R143
1 k
R141
1 k
C132
0.047
S2
JPM1990-2013R
C137
470 P
C138
0.001
R158
4.7 k
R156
4.7 k
C140
470 P
C141
4.7
C148
0.001
Q32
2SB1462 R
R155
47 k
R157
100 k
C139
0.0047
C133
4.7
R145
220 k
R160
150 k
SEG31 SEG30 SEG29 SEG28 SEG27 SEG26 SEG25 SEG24 SEG23 SEG22 SEG21 SEG20 SEG19 SEG18 SEG17 SEG16 SEG15 SEG14 SEG13
SEG17
P30/SEG18 P31/SEG19 P32/SEG20 P33/SEG21 P34/SEG22 P35/SEG23 P36/SEG24 P37/SEG25 P00/SEG26 P01/SEG27 P02/SEG28 P03/SEG29 P04/SEG30 P05/SEG31 P06/SEG32 P07/SEG33 P10/SEG34 P11/SEG35 P12/SEG36 P13/SEG37
SEG16 SEG15 SEG14 SEG13
TXC
KR1
KR2
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
COM1
COM0
3
6
9
BAND
KSD2
OUT
4
O
G
I
2
3
4
+
+
-
-
+
+
+
+
++
EXTMIC
SPE
INTSP
AFON
AM
TXC
SHIFT
VCC
+
-
C : 2.2
C : 13.2
C : 3.5
T: 3.5
R: 0
SGLO: 0
SGLC: 3.5
C : 3.5
T: 3.5
R: 0
0.2 ns
2.0 v

Icom IC-T7H Specifications

General

Brand	Icom
Model	IC-T7H
Category	Transceiver
Language	English