Icom IC-2820H Service Manual page 46

10-2 MAIN UNIT (1)
C622
0.001
IC24
OPC-465 2SB1132 TA7808F
Q81
HV VCC
I O
G
W50
R477
47K
IC21
TA7805F
C;4.95V
4.7K
I O
G R498
MA2S111 470
D119 R499
4.7K
R500
MA2S111 470
D120
R501
Q82
UNR9214J
IC22
1 8
A0 VCC
2 7
A1 WP
3 6 SCL
A2 SCL
4 5
SDA
VSS SDA
24LC512T
CLONE_OUT
CLONE_I N R512
100
R831
AF_VOL_CK
AF_VOL_DATA
AF_VOL_STB
100
AF_VOL_RES R832 100
R833
L_AF_MUTE
100
MIC_PTT
X4
C588
NMI
18P
CR-841 MD2 EP19
MMZ1005Y102CT MMZ1005Y102CT
EP20
XOUT
R481
1M
MIC_PTT
RESET
R815
CL_SFT1
100K
R816
CL_SFT2
100K
L_SQL
CL_SFT2
CL_SFT1
4.7K
RESET 100
GPSRESET R489
R476
IC23
1 5 R_SQL
OUT CD
2
VDD R836
3 4 DCEL
VSS NC
100 R835
S-80945CNMC ACQ
100
98_DATA
R484
100K
R479
MIC_SEL
1k
I CU and Flash
J24
NMI
12
MD2
34
RESET
56
CF20OPEN
78
CP1
91 0
52465-1071
4.7K R495
MICUD
1k
R494
J2 MMZ1608Y102BT X8
EP5
8V 1
EP6
MICU/D 2
EP7
EXTMIC 3
EP8
PTT 4
EP9
MICE 5
EP10
MIC 6
EP11
7
GND
EP12
8
MICI N
3008L-8P8C
0.001
0.001
R858
HSJ1462-01-010 IC46
MMZ1005Y102CT
J5 0.22 1 16 470K
MMZ1005Y102CT EN FORCEOFF
C849 2 15
EP32 C1+ VCC
3 14 1SS400
V+ GND
C850 4 13 1SS400
C1- COUT
EP31
0.22 5 12 D165
C2+ FORCEO N
D166
6 11
C2- DI N
7 10
V- INVALID
R759 C852 8 9
RIN ROUT
0.22 R859
100
MAX3221IPWR
470K
100
1SS400
R758
D167
PCB-606
6
6 TXDATA EP16 MMZ1005Y102CT R490 10K
5
5
RDATA R473 1k
4
4
GND EP14 MMZ1608Y102BT
3
3 CTHV EP13
2
2
1 MMZ1608Y102BT
1
J3
2820̲A3format.indd 16-17
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ZBFS5105
C618
L141
L138 L139 0.001
ZBFS5105 ZBFS5105
ZXCT1022
R850 R871
VI N VOUT
4 3
GND 180K 100K
2
LOAD NC
5 1
IC55
R814
100
100
TEMP
AVcc PA6/A22
73 36
P50/TxD2 PA5/A21
74 35
P51/RxD2 PA4/A20
75 34
P52/SCK2 PA3/A19
76 33
PF0/BREQ/IRQ2 PA2/A18
77 32
PF1/BACK/BUZZ PA1/A17
78 31
PF2/WAIT PA0/A16
79 30
PF3/LWR/ADTRG/IRQ 3 PB7/A15
80 29
PF4/HWR PB6/A14
81 28
PF5/RD PB5/A13
82 27
PF6/AS PB4/A12
83 26
P1Vcc PB3/A11
84 25
PF7/FAI PB2/A10
85 24
Vss
PB1/A9
86 23
TEST PB0/A8
87 22
VCL* PC7/A7
88 21
OSC2 PC6/A6
89 20
OSC1 PC5/A5
90 19
NMI PC4/A4
91 18
MD2 PC3/A3
92 17
XTAL PC2/A2
93 16
Vss PC1/A1
94 15
EXTAL P1Vcc
95 14
Vcc PC0/A0
96 13
MD0 Vss
97 12
MD1 PD7/D15
98 11
STBY PD6/D14
99 10
RES PD5/D13
100 9
P20/TIOCA3 PD4/D12
101 8
P21/TIOCB3 PD3/D11
102 7
P22/TIOCC3 PD2/D10
103 6
P23/TIOCD3 PD1/D9
104 5
P24/TIOCA4 PD0/D8
105 4
P25/TIOCB4 PE7/D7
106 3
P26/TIOCA5 PE6/D6
107 2
P27/TIOCB5 PE5/D5
108 1
C;7.88V
18K
MMZ1005Y102CT
R560
R529
EP23
1k
33 MSVB2
2SC4738
C619 C620
Q87
0.039 0.039
C624 R545
3
R527
1 15K
1
4.7K
IC26
5
1
4
3
2
LMV321IDCK
R517
2.2K
Q86
2SC4738
HV
5V
5VS
*D132
*D136
R_UVCO_SEL R_UVCO_SEL
*D133
*D137
R_VVCO_SEL R_VVCO_SEL
*D134
*D138
L_LO_SW L_LO_SW
*D135
*D139
R_DA_SEL R_DA_SEL
*D124
*D128
R_AFFILSEL
R828
*D125
0
*D129
R_DET_MUTE
*D126
*D130
L_DA_SEL
*D131
L_DET_MUTE
VTX_C
R558
VMMUTE
L_UNLOCK
PLLDATA
R563 PLLCK
R_UNLOCK
R_PLLSW
L_VCO_SHIFT
R556 UTX_C
UMMUTE
L_WN_SEL
L_R5C
IC31
R557
DTCS_SEL 1 14
100
I/O1 VDD
2 13
O/I1 CONT1
100 3 12
O/I2 CONT4
R564 L_AMC 4 11
I/O2 I/O4
L_PLLSTB P_MOD_MUTE 5 10
CONT2 O/I4
R_PLLSTB UNR9213J 6 9
CONT3 O/I3
ANALOGSW Q91 7 8
VSS I/O3
SUB_SEL
CD4066BPWR
DDETSEL
R534 100
R561 MODSEL
R486 MOD_DA
100 DADJSEL
R572
DADJMUTE
R536 100
100K
R573 22K C651
DDETMUTE
MIC_SENC
100K 1
R587
R813 P_SQL
R567 R568
P_PTT C647
DTMF
1200_9600SEL
4.7K 100K 0.0033
R_WN_SEL
R559 DCONT
MM_MUTE
DA_SEL
AN
DTMFSEL
DVDTMFSEL CPU DTMF
MM_MUTE
IC30
C636 R566 C637
1 14
I/O1 VDD
2 13
1 8.2K 1
O /I1 CONT1
3 12
O /I2 CONT4
4 11
I/O2 I /O4
5 10
CONT2 O /I4
6 9
CONT3 O /I3
M IC_SENC
7 8
VSS I /O3
CD4066BPWR
Q88
R570
UNR9213J
100K
UNR9213J
Q90
C;4.86V
DCONT
IC29 IC52
1 8 8 1
COM VCC VCC COM
2 7 7 2
INH CH0 CH0 INH
3 6 6 3
VEE CH1 CH1 VEE
4 5 5 4
GND A A GND
TC7W53FU 0.1 TC7W53FU
C648
R562
470K AN6123MS
C645
5
IC28
I NPUT DET
3 2
0.1 GND
4
4
OUTPUT VCC
5 1
TA75S558F
2 IC32
98_DATA
UNR9113J
R594 10
Q92 DATAOUT
P_PTT
4.7K
C663
J4
EP68
AFOUT
6 5
MMZ1005Y102CT
P_SQL EP24
4 3
MMZ1005Y102CT
R588
2 1
MIC_PTT
8.2K
UNR9213J
Q93
DN-508B-6-L
EP70 MMZ1005Y102CT
MMZ1005Y102CT
P_LR_SEL
8V
D142
U NR9210J
Q98
MA742
IC36
1
2
3
IC33
SN74AHC1G08DCK3
1 16
RSTN MDT
2 15
ADRS1 MCK
3 14
ADRS2 MLEN
4 13
DVDD DVSS
C679
5 12
LOUT ROUT
6 11
LIN RIN 0.1
7 10
AVDD AVSS
8 9
VRL VRR
SM6451B
C680
0.1
RPT_MUTE
MRIPT
R627 R632
3.9K 39K
Q100
UNR9213J
R624
2SA1362
Q94
100
AXN330C130P
EP26
GPSRXD0
EP27
GPSTXD0
Q118
UNR9213J
R620
Q97 10K
D141
2SC4738
MA2S111
C862
5
0.047
Q99
UMG9N
4
TC7W53FU LMV321IDCK
A GND
5 4
CH1 VEE IC50
6 3
CH0 INH 5
7 2 1
VCC COM
8 1
4
IC34 3
R615
2
2.2M
R800 R799
220K 220K
IC35
1 14
I /O1 VDD
2 13
O/I1 CONT1
3 12
O/I2 CONT4
4 11
I /O2 I /O4
5 10
Q95 CONT2 O/I4
6 9
CONT3 O/I3
7 8
VSS I /O3
U NR9213J
CD4066BPWR
DTMSD
DTMCK 10
11
12
DTMSTB 13
14
15
16
10 - 2
HV
8V
5V
5VS
L5V
C;4.87V
IC38 LA4445
2SC4213
5
Q 103 B2B-ZR-SM4-TF
R635 J7
4
SP1
330K
1 1
2 2
R638
PZ1608S221A M
10K
J9
EP55 EP54
R630
Q101
2SC4213
330K
M PZ1608S221A
HSJ1403-01-010
M PZ1608S221A
0.1
EP52
C716 EP53
R649 330K
R639
1k
8.2K R663 M PZ1608S221A
Q102
R631
719 C EP51
2SC4213
J8
47P
R665
330K PJ-3047S
12K EP49
MPZ1608S221A
IC60 IC61 MOD_DA
1 8 1 8 MODSEL
COM VCC COM VCC
R_RSSI
2 7 2 7
INH CH0 INH CH0
R_LV
3 6 3 6
VEE CH1 VEE CH1
4 5 4 5
GND A GND A
UTX_C UTX_C
TC7W53FU TC7W53FU
VTX_C
DA3_STB
DA2_STB
C695 CTCSS/DTCS
10K DA_STB
DA_CK
R644 10
DA_DATA
L_LV
R_LV
L_LO_SW
R_VVCO_SEL
R_UVCO_SEL
VMMUTE
UMMUT E
L_VCO_SHIFT
PLLDATA
R765
PLLCK
220K L_PLLSTB
R_PLLSTB
L_PLLSW
R_PLLSW
IC48
L_UNLOCK
1 14 R_UNLOCK
R785
2 13
3 12
390P L_R5C
2.2K
4 11
R_R5C
C855
5 10
R_AMC
6 9
L_AMC
7 8
IC51
LM2902PWR 1 8
COM VCC R400_S
2 7
INH CH0
3 6
VEE CH1
4 5
GND A
TC7W53FU
AMOD
9600bps
1 D-star R_RX800
2
L_WN_SEL
3 L_DET_MUTE
L_DA_SEL
AN
DA_SEL
L_AFFILSEL
R_AFFILSEL
DADJSEL
DADJMUTE
L_DTCS_IN
L_WXALT
DAFOUT
DDETMUTE
DDETSEL
R779 R780 R781
C864
VDET VDET
220K 100K 10K 4.7
1/2 VCC
R777 C865
UDET UDET
C684 10
4.7
C685 10 220K
R_WN_SEL
R_DET_MUTE
R_DA_SEL
DVDTMFSEL
VAFO VAFO
UAFO UAFO
R_WXALT
R_DTCS_I N
C903
BU8872FS
L_SQL
SD GND 0.1
9 8 L_RSSI
NC NC C902
7
ACK OSCI
6 R_SQL
NC NC 47P
5 R_RSSI
NC NC
4
EST O SC0
C901
3 DTMFSEL
NC NC
2
VDD INPUT CR-838 47P
1
IC56
*; Refer to "PARTS LIST."
2007/04/02 9:09:06