Service manual

6 – 3
UX-108U/178U/188U
FO-375U
Modem block 3/6
1
2 6
4
3
5
BDEFG
I
HCA
BDEFG
I
HCA
1 2
6
4
3
5
(*1)
UX-108U
UX-178U/188U/FO-375U
MODEL
10KΩ
N.M.
R137
N.M.
10KΩ
R238
+5V
D7
A0
C117
0.01
R113
270
D6 D5 D4 D3 D2 D1 D0
A1 A2 A3 A4
56 57 58 59 60
RS4 RS3 RS2 RS1 RS0
8
D7
9
D6
10
D5
11
D4
12
D3
13
D2
14
D1
15
D0
54
CS
55
READ
53
WRITE
52
IRQ
70
XCLK(12M)
71
YCLK(6M)
64
RTS
78
CTS
79
DCLK
82
DCLKI
73
RXD
95
TXD
96
RLSD
67
PORI
65
EN85
DG
61
75
76
94
93
91
72
23
50
6
7
16
66
77
80
81
89
92
97
22
L102
Z2145
C119
0.1
GP13
GP16
GP17
GP19
GP20
GP21
+5VD1
0VD1
0VD1
0VD2
0VD2
0VD2
0VD2
0VD2
0VD2
0VD2
0VD2
0VD2
0VD2
C131
1
+5VD2
+5V
L103
Z2145
+5VA
0VA 0VA 0VA 0VA 0VA
46
ADOUT
ADIN
RCVO
RCVI
RAMPIN
AGD
SWGAIN0 SWGAIN1
N.C. N.C. N.C.
17 21 30 43 47
C109
0.1
35 87 98 37
45 49 18 48 42 44 88 99 24
19 27 29 31 32
C3
47/25
R136
3
+5V
R114
0
MAG
N.C.
33
SIGRX
5
4
3
2
1
100
63
38
39
40
R132
85
25
83
26
74
84
86
90
68
GP07
GP06
GP05
GP04
GP03
GP02
GP11
TXLOSS2
TXLOSS1
EYECLK
ECLKIN1
EYESYNC
SYNCIN1
SYNCIN2
EYECLKX
EYEX
EYEY
XTLI
RCVOL1
RCVOL2
VOLA
(6-1H)
CNLIUB-5
(6-1H)
(6-2A)(6-2A)
R135
MAG
X1 24.00014MHz
C107
18P
R110
120
C106
15P
R111
200
69
XTLO
IC2
R96DFXL-CID
N.C. N.C. N.C.
DG
(6-3A)
MPXC
VOLB
DG
D[7~0] RD
WR
(1-6I)
(1-3I) (1-3I)
(1-3I)
DG
C118
R115
0
(5-1B)
DG
62
N.C.
R137
LEDON
N.M.
DG
C130
N.M.
51
RXIN
41
DAIN
34
AOUT
N.C.
28 20
N.C. N.C. N.C.
DAOUT
TXOUT
MAG
C108
1
C120
390P
C121
0.1
R112
47.5K
AGD
(6-3A)
SIGTX
(6-5A)(6-5E)
36
BYBASS
N.M.
DG
R162 470
R157 470
R158 470
R159 470
R160
N.M.
N.M.
CNLIUB-3
MPXA
MIRQ
(1-6F)
A[4~0]
(1-5I)
SYSCLK
(1-6F)
MDMRST
(1-5A)
MCS
R109
470
MAG
R129
10K
TXLOSS3
(1-4A)
BYPASS
R166
10K
R131
10K
(6-2A)
L105
Z2145
R238
(*1)