Front Unit - Icom IC-910H Service Manual

SECTION 12 VOLTAGE DIAGRAMS

12-1 FRONT UNIT

D36
[TX]
DAP202K
[COMP]
[VOX]
D37
1SS355
MAIN
TX/RX LED
DS32
R74 470
SEC2462C
R75 390
DS33
R76 470
SEC2462C
R77 390
SUB
TX/RX LED
MAIN
J1 J2
R1
RV-314 +5V +5V
6 1
5 2
[SQL VR]
MSVR MSVR
4 3
MAVR 4 MAVR
3
2 5
GND
1 6
[AF VR]
VR-A BOARD
SUB
J1 J11
R1
RV-314
+5V +5V
6 1
5 2
[SQL VR] SSVR SSVR
4 3 C90
SAVR SAVR
3 4 0.001
2 5
GND
1 6
[AF VR]
VR-B BOARD
FUNC BOARD
D1
[SET SW]
DAP202K
[ATT SW]
[AFC SW]
D2
J1 J3
DAP202K
KST1 KST1
[AGC SW] 1 6
KST2 KST2
2 5
KST3 KST3
3 4
KRT0 4 3 KRT0
[TS SW] KRT1 KRT1 C14
5 2
GND GND 0.1
6 1
D3 IC6
DAP202K HN58X2464TI
1 VCC
[LOCK SW] A0
2
A1
3
A2 SCL
4
VSS SDA
J1
R1 J10
RV-316
+5V +5V
6 1
NC
5 2
[SHIFT VR] SFVR
SFVR 4 3
RIVR RIVR
3 4
2 5
GND
1 6 IC7
C13 S-80942ANMP-DD6
[RIT VR]
0.001
5
CD OUT
VDD
RIT BOARD 4
NC VSS
C15
0.027
68nsec
C19
0.001
J4
R44
+5V
4.6V 1 220k
to MAIN B
2
SENSOR A
3
R43
4 C20
100k
100p
R48
220k
R47
100k
4.96
1
C23
0.1
R51 R53
100k 2.2k
R52
1k
C24
0.001
L1
J2 J5 HF50ACC322513-B
J1
PHIN PHIN
6
1
GND GND L2
R2 100 5 2
SSPO SSPO
4 3 HF50ACC322513-B
PHG
PHG1
R1 100 3 4
MSPO
2 5 MSPO L3
GND GND
1 6 HF50ACC322513-B
R59
100k
L1
C1
C3 HF50ACC322513-B
0.001 C2
0.001
0.001
JACK BOARD
R60
C25
2.2k 0.001
J1
J2 J6
GND GND
7 1 1 1 L4
2 2 HF50ACC322513-B
+9V +9V
6 8 2 3 3
MIUD MIUD2 EP1
4 4
MSQLS MSQLS
5 3 5 5
PTT PTT L5
4 6 HF50ACC322513-B
6
AFO AFO
7 7
GND GND
8 8
MICE EP3
MICE
9 9
MIC MIC EP4
10
10
MIC BOARD DISPLAY BOARD
R1
1k
POWK
L201 R201
[POWER]
C1
SLF7032T-101MR45-2
0.001 R202
D1
R2
[KOR]only
1SS355
47k
KRT0 KRT0
VER1
D2
R3
KST0 C204
1SS355
47k except[EUR]
KRT0 KRT1 KRT1 100
VER2
KRT1
D3
R4
KRT2 1SS355 [AUS], [EUR]only
47k KRT2 KRT2
VER3 R188 1k
14KT
R5
47k KRT3 1k
R187 43KT
D5
R6
1SS355 except[USA-1]
MRLE 47k KRT4 KRT4 R186 1k
14KR 12KT
D6
R7
MTLE 1SS355 except[USA-1]
47k KRT5 KRT5
43KR
D7 C2
R8
except[USA-1]
1SS355 0.1
SRLE 47k KRT6 KRT6
12KR
IC3
STLE R9 BU4052BCFV
1 16
47k KRT7 SAVR
Y0 VDD
MIVR
POVR 2 Y2 X2 15
3 14 MSVR
Y X1
SFVR 4 13
Y3 X
MAVR
SSVR 5 12
Y1 X0
6 11 RIVR
INH X3
7 10
VEE A
8 9
VSS B
D9
5V
1SS355
[PWR CONTROL]
R178
1k
POVR IC4
BU4052BCFV
R10 SMLS1 1
EVU-FLAEC2B14 FORL1 2
3
[MIC GAIN CONTROL]
MIUD1
4
R179
CENM1 5
1k
MIVR 6
7
R11
8
EVU-FLAEC2B14
PHIN1
R39
C600
RESET
+5V
C216
0.1
C5V
8
7
WC
6
5
MDAT1
1 P96/ANEX1/SOUT4
MCK1 2
P95/ANEX0/CLK4
DIMV 3
P94/DA1/TB4IN
TONE1
4
P93/DA0/TB3IN
SBSY1 5
P92/TB2IN/SOUT3
6
R36 P91/TB1IN/SIN3
R205 R38
MITX 7
100k P90/TB0IN/CLK3
100k 10k
8 BYTE
CNVS 9
1 CNVSS
10
2 P87/XCIN
11
3 P86/XCOUT
12
C17 12p RESET
R37
C16 C213 13
39k XOUT
0.001 0.1 14
VSS
15 XIN
16
VCC
R40 100k 17
P85/NMI
BFST1
18
X1 : CR-636 P84/INT2
C18 12p R42 100k 19
P83/INT1
(14.7456 MHz)
20
P82/INT0
KDS1
21
R46 P81/TA4IN/U
22 P80/TA4OUT/U
1M
MDIB 23
P77/TA3IN
MDIA 24
R45 P76/TA3OUT
8 SEND2
25
100k P75/TA2IN/W
1 ETON1 26
P74/TA2OUT/W
7 12PV1 27
P73/CTS2/RTS2/T
2 BEEP1
28
C21 IC8A P72/CLK2/TA1/OU
29 P71/RXD2/SCL/TA
0.1
TC7W08F 30
P70/TXD2/SDA/TA
R50 C527
1M 0.1
R49
100k
5
3
6
C22
IC8B
100p
4 TC7W08F
RXD
TXD
R55 6.8k 4.96
R56
IC9B 33k
TC7W04F
8
Q12
2 6
2SA1586 D13
7
1SS355
R57
CIV
IC9A 47k
4
TC7W04F 4.76
R54 CIVE
47k
R58
18k
3 5
W2
IC9C
Q13
TC7W04F
2SC4116
0
PHIN1
PTT ON :0.19
PTT OFF:0.67
SSPO
PHG
MSPO R61
47k R66
MIUD1
1k
C27
D14 D15
0.001
DAP202K
R67
1SS355
2.2k
ACUD
+9V
R68
PTT 820
PTT ON :0.19
PTT OFF:0.67
MEASUREMENT CONDITIONS
MAIN:146.0MHz MODE:FM
SUB :440.0MHz MODE:FM
DIGITALMULTIMETER
Unit:Volt
EP2
MICE
MIC
12 - 1
From The N3UJJ.COM Document Library From The N3UJJ.COM Document Library
MP801
-5.01
1.5
D202 L203
8 1
1.5 CD CS SB07-03C SLF7032T-101MR45-2
7 2
SI ES
6 3
V+ CT
DS7
5 INVIN GND 4
L202
C208 C210
SLF7032T-101MR45-2 0.1
IC201 150p
C211
C212
NJM2360M 0.1
100
DS4
R203
R204
C207 2.7k
8.2k
100
0.1
DS1
14KT
Q1
+5V
2SD1664
C4 0.1 R96 R190
R189 10k 4.33
47k 10k
IC5
BU4052BCFV
R14
1 16
43LV1 R15
Y0 VDD 27
NSQM1
NSQS1 2 Y2 X2 15 82
3 14 AVXL1
Y X1
TEMP1 4 13
Y3 X
VOXL1 5 12
Y1 X0
6 11
INH X3 OVDV1
4.33
7 10
VEE A
8 9
VSS B
Q11
2SC4116
4.92
R13
C3 0.1 1k
4.96
DIMV
16
Y0 VDD
CENS1
15
Y2 X2
14
Y X1 DS31
MP2X
Y3 X 13 A0095
12 SMLM1
Y1 X0
11
INH X3
R183
10
VEE A
10k
VSS B 9
MP2Y
W1
ALCL1
+9V
47k
0.1 C577
0.1
TXS1
C38
0.1 RXS1
L11
C576
1µH
0.1
C56
0.001
C40
470
51
SG22
SEG21
14UL1 SG21 52
P10/D8 80 SEG20
79 43UL1 SG20 53
P11/D9 SEG19
78 12UL1 SG19 54
P12/D10 SEG18
TXS1 SG18 55
77
P13/D11 SEG17
76 RXS1 SG17 56
P14/D12 SEG16
75 LCDA SG16 57
P15/D13/INT3 SEG15
58
74 RD SG15
P16/D14/INT4 SEG14
WR SG14 59
P17/D15/INT5 73 SEG13
72 LCD0 SG13 60
P20/A0(/D0/-) SEG12
71 LCD1 SG12 61
P21/A1(/D1/D0) SEG11
LCD2 SG11 62
70
P22/A2(/D2/D1) SEG10
69 LCD3 SG10 63
P23/A3(/D3/D2) SEG9
68 LCD4 SG09 64
P24/A4(/D4/D3) SEG8
SG08 65
67 LCD5
P25/A5(/D5/D4) SEG7
LCD6 SG07 66
P26/A6(/D6/D5) 66 SEG6
IC1 65 LCD7 SG06 67
P27/A7/(/D7/D6) SEG5
M30622MAA-869FP 64 SG05 68
VSS SEG4
KRT0 SG04 69
63
P30/A8(/-/D7) SEG3
62 SG03 70
VCC SEG2
61 KRT1 SG02 71
P31/A9 SEG1
SG01 72
60 KRT2
P32/A10 SEG0
KRT3 LCDA 73
P33/A11 59 A0
58 KRT4 LCDC 74
P34/A12 OSC1
R78
57 KRT5 75
P35/A13 OSC2
KRT6 2.2M RD 76
56
P36/A14 E(RD)
55 KRT7 WR 77
P37/A15 R/W(WR)
54 KST0 78
P40/A16 VSS
LCD0 79
53 KST1
P41/A17 DB0
KST2 LCD1 80
P42/A18 52 DB1
51 KST3
P43/A19
C39
0.1
R79
47k
TST0
MPSA
MPSB
MRLE
Q18
C541 C542 C547 C549
C536 C538 C548
DTC114TU
0.1 0.1 0.1 0.1 0.1 0.1 0.1
MTLE
Q19
DTC114TU
R69 R70 R71
C94 C36
47k
47k 1k
0.1 0.1
SRLE
Q20
R72 D16
DTC114TU
2.2k 1SS355
STLE
Q16 Q17
2SC4116 2SC4116 Q21
R73
DTC114TU
820
H5V
TX:4.93 TX:0
RX:0 RX:0.64
5.07
C50
10
KST3
KST2
DS1 - DS24
TLGE1002
KST1
KST0
DS8 DS9 DS10 DS11 DS12 DS19 DS22
DS5 DS6 DS13 DS14 DS15 DS20 DS23
[M/S] [FM]
DS2 DS3 DS16 DS17 DS18 DS21 DS24
KRT7 KRT4
[SUB] [TONE]
KRT6 KRT7
7.22 [CALL]
KRT5
R16
82
Q24
2SB1201
14V
5V
R90
R91 10k
10
FAN ON:0.19
C53 0.001
OFF:0
Q22 Q25
DTA144EU 2SC4116
R92 39k
Q23
DTA144EU
R93 8.2k
Q26
C51
DTA144EU
10
R98 560
R94
12k
PCK1
PDAT1
14DT1
43DT1
PST41
14UL1
43UL1
C72
0.001
BFST1
R118
IC2
10k
SED1540FOA
R114 47k
30
SG43
SEG42 R116 47k
29 SG44
SEG43
28 SG45
SEG44 47k
R115
27 SG46
SEG45
26 SG47
SEG46
25 SG48
SEG47
24 SG49 CIV
SEG48
23
SG50 CIVE
SEG49
22 SG51 DRES1
SEG50
21 SG52 PTT11
SEG51
20 SG53 ACUD
SEG52
19 SG54
SEND1
SEG53
18 SG55 ATXS1
SEG54
17 SG56 DASH1
SEG55
16 SG57
DOT1
SEG56
15 SG58 SBSY1
SEG57
14 SG59 KDS1
SEG58
13 SG60 CENM1
SEG59
12 SG61
AGRM1
SEG60
11 SG62 SQLM1
SEG61
10 SG63 NSQM1
SEG62
9 SG64
SMLM1
SEG63
8 SG65 CTCM1
SEG64
7 SG66 BEEP1
SEG65
6 SG67 CENS1
SEG66
5 SG68 D20
AGRS1 1SS355
SEG67
4 SG69 SQLS1
SEG68
3 SG70 NSQS1
SEG69
2 SG71
SMLS1
SEG70
1 SG72 CTCS1
SEG71
MSC1
OVDV1
TONE1
C88
R139
0.001
1M
5V
R117
18k
C41 C42
0.1 0.1
R83 R82 R81 R80
1.2k 10k 10k
10k INTS1
INTM1
+9V
TXS1 R151 220
RXS1 R152
SCON1
MCK1
MDAT1 R154 220
L7
HF50ACC322513-B
ETON1 R184 220
AVXL1
VOXL1
C46
0.1
R182
PCK1
IC10 PDAT1
BU4094BCFV OPB11 R172 220
FRST 1 16
STRB VDD
MDAT1
2 DATA OENA 15 DRES1 12PS1
MCK1 3 14 ALCL1
CLK Q5 MSC1
MRL 4 13 FAN1 12DS1
Q1 Q6
MTL 5 12 FAN2 43PV1
Q2 Q7
SRL 12UL1 R166 220
6 Q3 Q8 11 FAN3
STL 7 10 14PV1
Q4 Q'S
8 9 12ST1
VSS QS
POWS1
12PV1 R170 220
R185
47k TEMP1
IC11
120
R88
AN78L05M
EP5
R87 120
C48
C49 C47
0.1
0.1 10
5V
FORL1
D47 D48 D49 D50 D51 D52
DAP202K
DAP202K DAP202K DAP202K DAP202K DAP202K
D44
D45 D46
DAP202K DAP202K
DAP202K
[V/M] [A=B] [A/B]
[SSB] KRT5 KRT4 KRT3
KRT3
[MW] [M-CL] [M->V]
[SPLIT] KRT2 KRT7 KRT6
KRT6
[CHECK] [MPW] [MPR]
KRT5 KRT4 KRT3
[SCAN] [SWEEP] [F-INP]
KRT2 KRT7 KRT6
[SATELLITE] [RIT]
KRT5 KRT4
[M-DOWN]
[M-UP]
KRT3 KRT2
D17
J12 P1
CHASSIS
MA8068 GND
L6 1 1
NC
HF50ACC322513-B 2 2
MF1
FANV
3 3
+
M
FAN ON:11.62
OFF:13.36
-
FAN ON:7.37
OFF:0
LOCK :0 J9
UNLOCK:4.11
GND
20
R108 220 PCK
19
R107 220 PDAT
18
R106 220 14DT
17
R105 220 43DT
16
R104 220 PST4 15
R103 1k 14UL
14
R102 1k 43UL
13
GND
12
C73 R101 R100 GND to PLL
11
0.001 100k 100k LOCK :0 unit J1
10
UNLOCK:4.15 BFST
9
R41 220
8
14V
7
L10 14V
6
C71
HF50ACC322513-B
5
0.001 +9V
4
3
-5V
2
GND 1
J8
GND
1
CIV
2
CIVE
3
R113 220 DRES
4
D24 1SS355 PTT1
5
MIUD
6
R135 220
SEND
7
R136 220 ATXS
8
D25 1SS355 DASH
9
D26 1SS355 DOT
10
R155 220 SBSY
11
R124 220 KDS
12
R130 1k CENM
13
R132 220
AGRM
14
R134 220 SQLM to MAIN
15
R126 1k NSQM unit J1151
16
220
R160 SMLM
17
R137 220 CTCM
18
R162 220 BEEP
19
R129 1k CENS
20
R131 220
AGRS
21
R133 220 SQLS
22
R125 1k NSQS
23
R159 220 SMLS
24
R138 220 CTCS
25
R123 220 MSC
26
R161 220 OVDV
27
-5V
28
C86 1 TONE
29
GND
30
C89
0.001
11.5msec
R141
at 88.5Hz
1M
3.9V
R111 R112
R150
100k 100k
18k
FM,TONE ON,at TX
J7
R110 R109
C74 C75 GND
1
220 220 0.001 0.001
INTS
2
INTM
3
TXS
4
220 RXS
5
220
R127 SCON
6
R153 220 MCK
7
MDAT
8
L8 HF50ACC322513-B 9
+9V
10
ETON
11
R128 220 AVXL
12
R157 220 VOXL
13
+5V
14 to MAIN
220 15 unit J1101
PCK
16
R181 220 PDAT
17
OPB1
18
FORL
19
220
R163 12PS 20
R158 1 ALCL
21
R164 220 12DS
22
R165 220 43PV
23
12UL
24
R167 220 14PV
25
R168 220 12ST
26
R169
220 POWS 27
12PV
28
R171 220 TEMP
29
GND
30
D10
D31
1SS385
RB706F-40
R19 100k
C57 0.47
220
R156
J14
MSPO
1
SSPO 2
PHG
3
from MAIN
14V
4 unit J1251,
HV
5 J1201
MIC 6
MICE
7
13.57 13.38