Ut-121 (Optional Product; Codec Unit For Ic-91Ad) - Icom IC-91A Service Manual

12-5 UT-121 (Optional Product ; CODEC UNIT for IC-91AD)
CODEC UNIT
J1
AMBECLK
AMBERES
DCEL
AMBESTB
RXDT
AMBEEPR
RXCK
+3V
TXDT
TXCK
to LOGIC
DMOD
unit J400
ACQ
AMODIN
DVC
DAFOUT
AMBETXD
BTONE
AMBERXD
AGND
+3V
DVC
25
GND
24
ENCODER_EN
23
VDD
22
NC
21
NC
20
EPR
19
NC
18
NC
17
NC
16
NC
15
NC
14
NC
13
NC
12
VDD
11
VDD
10
GND
9
GND
8
VDD
7
NC
6
NC
5
NC
4
NC
3
NC
2
NC
1
GND
C100 C101
0.1
0.1
+3D
DMOD
AMODIN
DAFOUT
BTONE
AGND
IC1
R1
R1111N321B
22
1 5
VDD VOUT
2
GND
C1 3 4 C2
CE NC
22
RX DV: 5.06V
RX FM: 5.08V
R2
47K
RX DV: 3.44V
RX FM: 0.95V
Q50
Q51
2SA1362
XP1501
C54
0.001
1 5
C50 2
0.001
3 4
R50
4.7K
C52
C53
2.2
0.001
C51
0.001
C107
0.1
C108
0.1
51
CLOCK_MODE
52
GND
53
GND
54
VDD
55
NC
56
GND
57
VDD
58
NC
59
NC
60
NC
61
NC
62
NC
IC101
63
AMBE-2020 GND
64
VDD
65
GND
66
NC
67
X1
68
X2/CLKIN
69
RESETN
70
RATE_SEL0
71
RATE_SEL1
72
RATE_SEL2
73
RATE_SEL3
74
RATE_SEL4
75
CHANN_SEL0
C104
C102 C103
0.1 0.1
0.1
IC203
SN74AHC1G66HDBV3
EP203
5 1
2
4 3
C213
0.1
R212
47K
Q201
C214
UNR9215J
0.001
C303
0.1
C304
1
EP1
C3
10 0.1
Q2
R3
UNR9215J
10K
RX DV: 1.38V
R108
RX FM: 0V
100K
Q100
2SC4081
RX DV: 0.4V
RX FM: 0V R109
C113
0.1 220
C111
0.001
5 1
VCC NC
2
A
4 3
Y GND
IC102
SN74LVC1G04DCK
C116
0.1
C358 EP351
0.1
R354
47K
SI
CP1
RX: 3.28Vp-p
SEN
R105
SO
330
SCLK
C109
AMBERES
0.1
EP352
C357 C356 C355
0.1 2.2
47P
R104
1K
C201
R213 R214
0.1
1k
100
AMBERES
EP201
IC201
SN74AHC2G74HDCT3
R100
47K
8 1
VCC CK
7 2
PR D
6 3
CLR Q
5 4
RX: 3.44Vp-p
Q GND
R202
CP2
0
EP202
IC202
C205
CP202 CP203
CMX589AD5
0.1
CP201
24
VDD
23
S/N
TXCK 22
TXC
RXCK
21
RXC
RXDT
20
RXD
TXDT 19
TXD
18
TXP
17
R210 22K TXE
16
R211
TXO
15
390K
BT
14
DOC1
13
DOC2
R217
10K
DCEL
ACQ
R306
33K
R305
100K
R307
C212
100K
0.0022
IC301
NJM2115V
12 - 5
Explanatory notes
Q1
2SA1362
R107
1k C112
R310
0.1 10
R106
100
C117
0.001
C310
10
EP100 EP300
X100
C114
C300
CR-820 0.1
0.1
3 4
OUT VCC
2 1
GND GND
R350
680
EP350
IC350
AD73311ARSZ
R351 1K
20 1
SE VOUTP
19 2
SDI VOUTN
18 3
SDIFS AVDD1 R352 47K
17 4
SDOFS AGND1
16 5
SDO VINP
15 6
R353
MCLK VINN C353
14 7
0.1 100
SCLK REFOUT
13 8
RESET REFCAP
C352
12 9
DVDD AVDD2
0.047
11 10
DGND AGND2 C354
0.1
AGND
C360
0.001
RX DV: 1.52V
RX FM: 0V
EP200
R215 100K
X200
C200
C216
CR-821
0.001 0.001
3 4
OUT VCC
Q202 2 1
GND GND
2SC4081
RX DV: 0.4V
RX FM: 0V
C202 R216
0.1
220
R203 R204 R205 R206 R207
47K 47K 47K 47K 47K
1
XTAL
2
XTAL/CLK_RX
3
CLKDIVA
4
CLKDIVB
5
RX_HOLD
6
RXDCACQ
7
PLLACQ
C209
8 22P
RX_PSAVE
9
VBIAS R209 100K R208
10
100K
RXFB
11
RX_SIG_IN
12
VSS
C210
Q200
1
UNR9215J
C211
0.001
VOLTAGE LINE
TX LINE
RX LINE
COMMON LINE
R300 C301
47K
1
R301
120K
C350
0.1
IC300
NJM2115V
R304
100K
R302
100K
R303
47K
C302
0.1