Service manual
FO-DC550 CIRCUIT DIAGRAM 14 - 34
7
7
6
6
5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
FAX MAIN PWB (MN195006Q) 4/6
A11
A10
A9
A8
A7
A6
A5
A4
A3
A2
A1
A0
D1
D3
D2
D4
D6
D7
D0
D5
A[21:0]
CS_ML
OEL
MCLOCK
M_RESETL
MDM_IRQ
CLKIN
WEL
ABITCLK
ASPCLK
ATXD
ARXD
AFERST_L
D[7:0]
GND
GND
GND
GND
GND
+1.8V
GND
MDM3.3V
+3.3V
GND
MDM3.3V
+3.3V
MDM3.3V
MDM3.3V
MDM3.3V
MDM3.3V
GND
+3.3V
+3.3V
GND
GND
GND
GND
+3.3V
MDM3.3V+5V
MDM3.3V
GND
+3.3V
GND
FL9
FL8
R1009 47k
FL6
FL2
FL1
R1024
47K
C34
F0.1u/16V
R22 47K(NM)
C1017
F0.1u/16V
C23
F0.1u/16V
C33
F0.1u/16V
C24
F0.1u/16V
D5 1SS355(N.M.)
R1026 47K
C1015
F0.1u/16V
C1013
F0.1u/16V
R33 47K
R1008
47K
R23 47K
R24 47K
C16
A22u/16
R26 47K
C18
F0.1u/16V
R1025 47K
C32
F0.1u/16V
C36
A47u/25V
C1016
F0.1u/16V
R1063 0R(3216)
R20 0R
R41 0R(N.M.)
C38
F0.1u/16V(N.M.)
R19
47K
C1034
F0.1u/16V
R1036
0R(3216 N.M.)
C19
F0.1u/16V
C1018
100pF
C17
F0.1u/16V
FL10
ZJSR5101(22000p)
R1006 75
R25 4.7k
CN1
A2-6PA-2.54DSA(NM)
1
2
3
4
5
6
R21 0R
C1021
F0.1u/16V
R15 33
R34 47K
R35 47K
X1
SCO10-24.576000MHz-3.3V
4
3 1
2
VDD
OUT OE
GND
R36 47K
C31
C470/16V
C20
F0.1u/16V
R37 47K
R38 47K
R39 47K
C8
A22u/16V
R16
33
C1014
F0.1u/16V
R40 47K
IC5 LM1117-3.3V(N.M.)
3
1
2
4
IN
GND
OUT1
OUT2
C49
A47u/25V
C1019
F0.1u/16V
R17 47K
C21
F0.1u/16V
R18 47K
R1010 47k
R1004
47K
R1012 47k
R8
47K
C1020
F0.1u/16V
BR1
33
1
2
3
4 5
6
7
8
R1011 47k
R1005
47K
R6 100
R1007 0R
R9 100
MN195006E
IC3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
18
19
20
17 21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
39
40
41
42
38
37
43
44
45
46
47
48
49
50
51
64
63
62
61
60
59
58
57
56
53
54
55
52
67
66
65
75
74
73
72
71
70
69
68
76
77
85
84
83
82
81
80
79
78
89
88
87
86
90
91
92
93
94
95
96
97
98
99
100
T3IRQ
DPD00
VDD3
DPD01
VSS
DPD02
DPD03
DPD04
VDD2
DPD05
VSS
DPD06
DPD07
DPD08
VDD3
DPD09
DPD10
DPD11
DPD12
VSS VDD2
DPD13
VSS
DPD14
DPD15
NDBGREQ
DBGMOD
TDO
TDI
VDD3
TCK
VSS
TMS
AVDD
AVSS
PLLON
CXIN
VSS
NRESET
VDD2
CXOUT
CNT
CLKOUT
VDD3
SCANNT
MINTEST
VSS
INTEST
MODE0
MODE1
LON
VSS
ATXD
VDD2
ARXD
ASPCLK
ABITCLK
EYEDAT
EYECLK
VSS
REGOUT
VDDREG
VDDREG
REGOUT
BRXD
BSPCLK
BBITCLK
NDPCS
NDPRD
NDPWR
NLB
NUB
VSS
BTXD
VDD3
GPIO0
GPIO1
DPA01
DPA00
GPIO5
GPIO4
GPIO3
VSS
GPIO2
VDD3
VSS
DPA03
DPA02
VDD2
DPA04
DPA05
VDD3
DPA06
DPA07
DPA08
DPA09
VDD2
DPA10
VSS
DPA11
C22
F0.1u/16V
BR2
33
1
2
3
4 5
6
7
8
FL12
FL11
FL7
R2 100
FL5
FL3