Icom IC-T2H Service Manual page 24

SECTION 11 VOLTAGE DIAGRAM
SP1
K036NA500-26A27
J5
SP
2
SPG
1
C164
0.001
5.0V
C148
+ +
0.1
MIC C176
MC1
R125 22
C175
KUC3523-040245 C177
220 k
15 22
R144
33 k
C163
0.001
S1
JPM1990-2013R
XP1501
C1 J6
0.001
BATT
1
RV-312
VOL IN
R1 2
VOL OUT
3
GND
4
VCC
5
+
C173
47
VR BOARD
R132
J2
470
OPT
EXT.
EMIC
MIC
C165
0.001
C166
0.001
R174
J3 15 k
AF OUT
D27
DA204U
SP
EXT. L34
10 µH
CLONE
SP
Q31
C169
C167 C299 DTC144TU
22 p 0.001 47 p
Q27
2SB1132
D25
R156
J4
SB07-03C
18
CHARGE
R157
18
C170
0.001
C202
C200 0.001
0.001
BATT
BATT
8.2V
BATT
C171
R158
0.001
GND D24
4.7 k C203
DA204U
C201 0.001
0.001
C172
470 p
COMPLETE VIEW
VCC
T5
R5
Q20
S5
2SA1588
5V
Q22
2SB1132
Q18
+ +
2SB1201
Q21
2SA1588
C174
R213
22
10 k
5 4
R272 6 5 4 Q19
4.7 k
XP6501
Q40
IC6
5.0V
C161 S-81250PG-PD
R139
0.01
4.7 k
1 2 3
3 2 1
R133
1 k
R137
O
4.7 k
C159
R141 C162 C160
+ +
0.001
4.7 k 0.001 0.01 C278
C157
15
0.001
R134
C158
4.7 k
100
R253
1 k
KR3
KR2
KR1
KR0
IR1/DST
IR0
D22
D16
MA6S121
R254
1 k
P0 P1 P2 P3
KS5
KS4
1 2 3 A
D23
D33
4 5 6 B
D34
MA111
D20
7 8 9 C D18 MA111
R255
1 k
KS3
KS2
KS1
KS0
0 # D
*
D17
MA6S121
11 - 1
9.5V
VCC
T5
CPU5
5 4
NTCCF20124AH
IC11
S-80742SL-A6
R220 C248
220 k 0.01
C197
0.001
1 2 3
2.9V
C246
0.1
Q23
R149
C247 2SC4081
R221 10 k
0.001
330 k
R218
R219
39 k
68 k
C230
Q36
R148 R214
0.47
2SC4081 100 k 12 k
+
I
G
C196
R146
R147
+ 0.001
100 k
220 k
C156
0.001
C155
D15 C144
10
MA111 0.001
IC10
R291
C198
100 k TC4S01F
0.01
3
C258 4
R217
0.1
10 k 2
R259
100 k
1
10 5 1
INPUT VDD
2 IC7
9
PD EST
X25040SI-2.7
3
8
OSCO STD
4 7
D31 8
OSCI ACK 1 VCC
MA111 CS
5 6 2 7
VSS SD SO HOLD
3 6
WP SCK
X3
4 5
EFOS4194E3 IC9 VSS
SI
[ANI]
[ANI] only
LC73881M only
Q39
DTA114TU
C245
0.001
R208 R209
56 k 560 k
TX: 0V
C264
C251 C252
0.1 RX: 3V
0.01 0.001
T5
R5
TX: 2.0V
RX: 0.5V
TX: 0V
R197 R199
RX: 1.0V
680 k 4.7 k
R229 R230
Q33 Q35
10 k 22 k
2SC4081 2SC4081
R203
R202
R192 47 k
R191 47 k
18 k C250
18 k
0.01
C228
C226
C249 0.0033
0.047
C222 C225 0.01
C227
0.047 0.012
R224 0.027
47 k
R207
TX: 0V
1 k
R200
R263 RX: 0.4V
1 k
220 k
TX: 1.4V
RX: 0V
R289
CL IN 1 k
VCC
T5
CPU5
TEMP
R182
473 k
R215
330 k
R181
C232
100 k R279
0.1 C142
100 k 0.1
C296
R103 R216 C231
0.1 0.1
12 k 150 k
C195
R102
18 p
10
X2
L10
CR-584
10 µH
D14
MA2S077
R101
1M
R106 C193
12 k 6 p
C194
27 p
R281
1 k
1
PBO/AND
RESET
2
AVSS
CSIFT 3
TEST
4
X2
5
X1
6
VSS
7
OSC1
R282
8
OSC2
1 k
R283 9
RES
R226
1 k
10
1 k
NMI
SCK
11
P20/IRG4/ADTRG
SI 12
P21/SCK1 HD6433875A41H
SO 13
HD6433875A45H
P22/SI1
14
UNLK
P23/SO1
15
P24/SCK3
R290
CL OUT 1 k 16
P25/RXD
17
PLST
P26/YXD
R227 18
R256 P27/IRQO
1 k
NOIS 1 k 19
P17/IRQ3/TMIF
OPINT 20
P16/IRQ2
ECS 21
P15/IRQ1
OPPD 22
P14
23
P13/TMIG
24
R260 P12/TMOFH
1 k
25
OPCS
CTDA2 P11/TMOFL
CTDA1
CTDA0
R252
R231 1 k
47 k
R234
82 k
R196
10 k
R235
100 k
R195
18 k
C199
0.01
C256 TX: 5
0.001 RX: 0
75
SEG40
P97/SEG40
P96/SEG39 74 SEG39
73
SEG38
P95/SEG38
72 SEG37
P94/SEG37
71
P93/SEG36
70 SEG35
P92/SEG35
69 SEG34
P91/SEG34
68 SEG33
P90/SEG33
67
P87/SEG32
66 SEG31
P86/SEG31
IC8
65 SEG30
P85/SEG30
[THA]
64 SEG29
P84/SEG29
[Other]
63
P83/SEG28
R287
1 k
62 CTDA2
P82/SEG27
R286 1 k
61 CTDA1
P81/SEG26
R285
1 k CTDA0
P80/SEG25 60
R245 22 k
59 T4/PWR
DA05
P77/SEG24
R246 47 k
58 DA04
P76/SEG23
R247 82 k
57 DA03
P75/SEG22
R248 180 k
56 DA02
P74/SEG21
330 k
R249
55 DA01
P73/SEG20
R258 680 k
54 DA00
P72/SEG19
53 AFON
P71/SEG18
R284 1 k
52 LIGHT
P70/SEG17
T5C
51
P67/SEG16
R236
1 k
TXC
R237
100 k
R257
1 k
RMUT
MMU