Icom IC-T81E Service Manual page 48

SECTION 11 VOLTAGE DIAGRAM
11-1 LOGIC UNIT
CPUHV
C103
198nS
R151 0.001
DS4 1K
Q151
LM-1782B
2SD2216 S
C102
3.2V
0.001
C: 0.6
IC141
C: 3.2
S-81332HG-KC
+3CPU D
G
R25
1 K
IC142
C7
0.001 S-80928ALMP-DAR
C151
0.001
1 2 3
SEG40 76 50 KS4
SEG12 P14/SEG38
C8 SEG41 77 49 KS5 R146
0.1 SEG11 P15/SEG39 1 M
SEG42 78 48 I2
SEG10 P16
R10 SEG43 79 47 I1
22 K SEG9 P17
SEG44 80 46 KR0
SEG8 P20 5 4
SEG45 81 SEG7 P21 45 KR1 R51
C150
SEG46 82 SEG6 P22 44 KR2 1 M 0.01
SEG47 83 43 KR3 C152
SEG5 P23 0.022
SEG48 84 42 ESIO
SEG4 P24
R9 SEG49 85 41 CK
220 K SEG3 P25
SEG50 86 40 DATA
SEG2 IC1 P26 R37
CONT SEG51 87 39 PTT 1 K
SEG1 P27
SEG52 88 M38267M8L-231GP [USA-1] 38
SEG0 VSS
C9 +3CPU 89 M38267M8L-230GP [other] 37
VCC XOUT
0.001 90 36 X1
VREF XIN CR-639
91 35
AVSS XCOUT
COM1 92 34
COM3 XCIN
COM2 93 33 RESET R26
R12 COM2 RESET 4.7 K
47 K COM3 94 COM1 P70/INTO 32 POWER
COM4 95 31 RM/MM
COM0 P71 IC2
96 30 MICC
VL3 P72 C4 C3 X24320-2.5
97 29 LIGHT
VL2 P73 27 P 27 P
98 28 BLED R8
R13 C2 P74 10 K
47 K 99 27 TCON
C1 P75
100 26 PCON
VL1 P76
R14
47 K
4 3
5 2
6 1
C12
0.1
Q3
C10
0.01 XP4315
R24
1 K
R35
C11 D4
1 K 0.1
MA2S111
C918
R53
C919 0.001
0.1 R333 220 K
10 K
+3C
R54 R55 R56
R36 R34 R17 R16 R30 R28 R32 R23
AFON 220 K 220 K 4.7 K
1 K 1 K 100 K 10 K 1 K 1 K 1 K 1 K
R33 R31 R29 R27 R21 R22 C13
1 K 1 K 1 K 1 K 1 K 1 K 0.001
R39
100K
POWER
UP C5
S1005 R38
E 0.001 POWER 100K
DN
KR3 KR3
KR2 KR2
KR1 KR1
KR0 KR0
I2
I1
BAND1 BAND2
C90 C91 C92 C93 D51
S1001 S1002 S1003 S1004 MA132WK
VFO MR CALL H/L 0.001 0.001 0.001 0.001
MA132HK
MA132K
KSD0 KS0
BAND3 BAND4
8 1
D COM
7 2 D52
S401 6 C NC 3
JPM1990-2013R E A MA132W
5 COM B 4 KMA132HK
KSD1 MA132K KS1
S7
TXFL TXFH
EVQ WRR 001 R316
470
D58
MA6S121 D53
MA132WK
1 2 3
S1006 S1007 S1008 MA132HK
MA132K
KSD2 KS2
RXF1 RXF2 T: 3.2
R: 0
D54 D55
4 5 6 D59 MA2S111 MA2S111
MA6S121 PTT
S1010 S1011 S1012
KSD3 KS3
Inh50 TXInh50
D56 D57
MA2S111 MA2S111
7 8 9
S1014 S1015 S1016
KSD4 KS4
IFS TXF50
* 0 # D60 D61
S1018 S1019 S1020 MA2S728 MA2S111
KSD5 KS5
S402
JPM1990-2013R
LEFT SIDE
C: 13.5
D141
MA2S111
R756
C718 100
0.1
R153 D151 C719
MA8100 M
47 K R141 Q753 0.1
15 K
D152 UN9115 R719
C101 R154 R718
0.001 10 K MA2S111 12 K
12 K D702
1SS364
C714
C754 2 1 0.1
Q141 R755 R753
1 K 470
UN9210
C: 12.6 Q145 C753 4 3
Q752 0.01 R713
2SB1132 R 12 K
2SD2216 S R715
I FI701 4.7 K
R754
D144 47 K PBFC450R15DR D701
MA2S111 R143 C141 1SS364
C145 4 5 C751 C715
0.001 10 K 0.001 R148 0.1
C: 13.2 100 K R751
10 K
Q142 C752 R714
12 K
22 P
XP1501 AB 3 2 1 R716
D143 R142 C756
22 K Q751 12 K
MA2S111 0.01
R752
XP1501 AB 330 K
R145
10 K R757
+3C C716
22 K R759
220 K 0.1
R144 C: 3.2
C143 C142 R758
4.7 K IC751
0.001 47 47 K R760 C757 C758 C759
1 M 0.22 Q754 TC4S66F
C149 C148 C147 C146 4.7 0.001
47 0.001 22 0.1 C755
2SD2216 S
0.047
4 5
PCON 2 1
3
C82 Q602
0.001
UN9115
+3C 4 3
R19
4.7 K 5 2 WFM
1 A0 VCC 8 Q603
2 7 6
A1 TEST C245 XP4312 1
3 6 0.1
A2 SCL
4 VSS SDA 5
R241
R18 1 M +3C
4.7 K R245 R244 R243
R246 82 K 82 K 82 K C241
120K
R248 0.1
470K C243
C240 C244 C242
0.1
0.0015 0.1 0.039
C246
R247 R242 IC201
0.1
100 K 470 K TA7368F
AFOUT
1 10
C247 2 9
100 P
Q1 3 8
R249 4 7
UN9115
220 K 5 6
R5 R4 R42 C248
IC241 0.1 C220
270 270 270 0.1
NJM2902V C203
47 P
R250 R267 R206
100 K 100 4.7K
C250 C249
C202
C252 0.01 0.01 C204 3.3
0.0022 R253 0.001
Q201
56K
DS3 DS1 2SB1201 S
LT1EP53A CL-200YG-C-TS R252 C253 R251
C251 330 K 0.0047 27 K
R254
56 K 0.001
4 5
C206 C: 12.7
100 R211
10 K
Q202
C361
C211 XP1501 AB
0.047 0.001 C210 3 2 1
10
R363 IC203
R362 R361 R212
470K Q361 IC202 TA75S01F
1 M 4.7 K 22 K 5 1 C209 R210 R209
2SJ364 Q M5222FP 12 K 1 K
4 0.001
8 1 3
R215
C362 7 2 2 R214
0.001 4.7 K
6 3 100 K
C214 5 4
C217
R196 R197 2.2
0.1
220 K 10 K
C216 C215 C213
R213
0.1 0.1 15
22 K
T: 3.2
R: 0
CTUOUT
R324
Q307 33 K
UN9214
R302 R301
MC1 R341 R311 10K 56K
D304
EM-140 RD5.1M B3 10 K 10
Q301 C302 C301
C307 C306 0.0047 0.0022 Q304
Q303 Q341 0.001 47
R321 C315 UN9115
C318 UN9214 UN9214 0.001 C308 R303 2SJ364 Q
C319 R320 3.3 K
0.001 33 K 0.01 120 P 27 K
C309
R340 R322 0.22
10 K 50 K C303 R304
56 K R305 C320
R312 1 8 560P
220 K 100 0.001
2 7
C323
3 6
C316 0.001 R318 C310 4 5
4.7 R336
10 K 1 K R314 470 P R328
470 K
R335 100 IC301 R309 C304
1 K 4.7 K
Q302 BA4510F 0.001
2SB1462 C313
0.0047
T: 0
C324 R: 3.2
0.001
R317 R313 R307 C305
C317 R319 100 K
220 K R315 C312 C311 2.2 M 0.0022
0.047 2.2 K
47 K 470 P 4.7
R310
R308
4.7 K 120 K
R306
C314
100 K
0.001
C325
0.001
R1
NTCCF20124AH 473KCT
T: 0
R: 3.4
C737 TXC
0.01
2NDLO
R2
100K
8 7 6 5
C907
R+3
0.001
R717
C709 C708 1 K C707 C706 R726
15 0.1 0.1 0.01 47 K 1 2 3 4
IC4
C703
0.001
1 16 TC4W53FU
OSCIN MIXIN
2 15
OSCOUT GND
3 14 THERMC
4 MIXOUT N-REC 13
VCC N-DET
5 12
IFIN RSSI
6 11
DEC IFOUT C700 2NDLO
R737 7 10 0.1
8 FILOUT QUAD 9
TBPS1R153K460H5Q C735 FILIN AFOUT
R730 C712
0.1 33 P
220 K IC701 R727
R735 22 K
15 K TA31136FN(D)
PSET
C733
C736 C734 0.001
0.001
0.001
R736 R734
15 K 22 K
R731 R732
180 K 4.7 K
C701
C713
0.001 R733 180 P C: 13.2
20 K
R706
10 K
L702
LS-528
C720 WFM
0.047
R729
Q702
1.8 K
UN9115
R+3
1 16
DO VCC
C212 2 15
3 LD VDD 14
150 CLK AO6
4 13
DI AO5
5 12
AO1 AO4
6 AO2 AO3 11
R201 7 10
10 NC NC
8 9
GND VSS
C201
R202 0.047 IC5
150
M62368GP
C77
R205 0.001
68
R204
68
C: 13.2
R203
68 VCC
C904 C903 C910
0.001 0.001 0.001
Q7 C: 3.3
C205
47 XP1501 AB
1 5
Q8
R208 SPREMOTE
R3C 2 2SB1132 R
10K
AFON C917
0.001 C901
3 4 0.001
C208 C207 C162 R207
1 M C75 C76
0.001 4.7 0.001 2.2 0.001
C: 5.0
DC-DC
R331 R332 R323 R337
L3
220 K 39 K 56 K 470 K 330
VCC
R342
D2
+3C 10 K
R325 R326 R327 R338 C17 MA729
3 2 1 0.68
50 K 50 K 50 K 50 K
Q308 IC3
R343
27 K
XP5601 AB XC6371A500PR
Q305 Q306 Q309
L1 L2
4 5 6 5CA-395KN-0369AQ 4.7
2SJ364 Q 2SJ364 Q 2SJ364 Q
I O
MOD G
D3
MA2S111 C6
C2 C: 2.5 4.7
C326 0.001
C321 C322 C328
0.001 R334
0.001 0.001 0.001 C1
1 K
4.7
R329 R330 R339
470 K 470 K 470 K
11 - 1
C906
0.001
2NDLO
IFIN 1 40
GND
2 39
THERM
PSET 3 38
37
GND 4
DATA
+3C 5 36
CK
PDA2/UL 6 35
AGC
34
VCC 7
TUNE
33
8
VHVCO
32
LOCKV 9
UVCO
31
PLST1 10
TXC
30
PDA1/UL 11
12VCO
29
BDET 12
WFM
28
13
GND
AM
27
MOD 14
GND
26
15
GND
R+3
25
PLST2 16
CHGC
24
17
6MVCO
23
HV 18
GND
22
FSET 19
DC-DC
21
EURDEV 20
C914 C913 C912 C909
0.001 0.001 0.001 0.001
AFO
INTSP
C923
47 P
R901
330
C927
0.001
C926
0.001
RIGHT SIDE