Service manual

3/6
Modem block
6 – 3
1
2 6
4
3
5
BDEFG
I
HCA
1
2 6
4
3
5
BDEFG
I
HCA
+5V
D[7]
A[4]~A[0]
R207
270
A[0]
C149
0.01
R189
10
D[6] D[5] D[4] D[3] D[2] D[1] D[0]
A[1] A[2] A[3] A[4]
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
79
TXD
82
DCLK
73
DCLKI
CTS
95
RXD
96
RLSD
67
PORI
65
EN85
(4-5D)
CNCS-1
RBN
OPT
R233
61
75
76
94
93
91
72
23
50
6
7
16
66
77
80
81
89
92
97
22
R210 33K
R256 33K
L116
0
C165
0.1
GP13
GP16
GP17
GP19
GP20
GP21
+5VD1
0VD1
0VD1
0VD2
0VD2
0VD2
0VD2
0VD2
0VD2
0VD2
0VD2
0VD2
0VD2
C190
1
+5VD2
+5V
L120
0
+5VA
0VA 0VA 0VA 0VA 0VA
46
NC NC NC NC
ADOUT
ADIN
RCVO
RCVI RXIN
C161
0.1
AOUT
RAMPIN
AGD
C175
390P
MAG
DAOUT
DAIN
SWGAIN0
SWGAIN1
TXOUT
NC NC NC
17 21 30 43 47
C171
0.1
19 20 27 28
35 87 98 37 45 49 18 48
C170
1
88 34 99 24 44
29 31 32
C10
47/25
R258
3
+5V
R222
0
MAG
NC
33
SIGRX
5
4
3
2
1
100
63
38
39
40
36
85
25
83
26
74
84
86
90
68
GP07
GP06
GP05
GP04
GP03
GP02
GP11
TXLOSS3
TXLOSS2
TXLOSS1
BYBASS
EYECLK
ECLKIN1
EYESYNC
SYNCIN1
SYNCIN2
EYECLKX
EYEX
EYEY
XTLI
R183
10K
TELMUTE2
(5-4A)
(6-1H)
CNLIUB-5
(4-5D)
R305
R264
10
MAG
X3 24.00014MHz
C147
27P
R211
120
C146
27P
R221
200
69
XTLO
IC11
R96DFXL-CID
R239
47.5K
DG
DG
BYPASS
DG
(2-2G)
(4-4D)
CSW
R262
270
R188
270
R200 10K
MCS RD WR MIRQ
(1-3I) (1-3I) (1-2I)
(1-6F)
DG
MDMRST
D[7]~D[0]
C174
0.1
C181
1000P
CNLIUA-8
C148
1000P
RHS
(6-3A)
(6-1H)
(6-1H)
CNLIUB-2
PIN
MPXO
VOLA
VOLB
VOLC
VREFCONT
(1-4A)
DG
N.M.
R248 10K
R263 10K
PEI
(*1)
R206
N.M.
62
NC
DG
C195
N.M.
AGD
(6-3A)
SIGTX
(6-5A)(6-5E)
41 42 51
NC NC NC
(*1)R233,R291 AND R296 ARE MOUNTED RESISTOR EVERY EACH MODEL AS FOLLOWS.
MODEL R233 R291 R296
N.M.10 KOHMUX-510U/C/UX-500U/C
FO1460U
10 KOHM
N.M.
N.M.
10 OHM
R293
DG
(*1)
R186
R299
R298
R297
R296 R291
R306
N.M
R290
33K
R300
78
R220
10K
(1-5I) (1-6I)
(1-5A)
R194
33K
DG
270 x 4
UX-510U/UX-510C/UX-500U
UX-500C/FO-1460U