Sharp MX-M550U / MX-M620U (serv.man2) Service Manual ▷ View online
MX-M550/M620/M700 CIRCUIT DIAGRAM / 回路図 4 - 14
IOD10
IOD8
IOD7
IOD8
IOD0
IOD10
IOD2
IOD0
IOD13
IOD9
IOD14
IOD3
IOD3
IOD15
IOD12
IOD9
IOD11
IOD1
IOD2
IOD1
IOD11
IOD4
IOD6
IOD4
IOD13
IOD7
IOD5
IOD15
IOD14
IOD5
IOD6
IOD12
SYSAD23
SYSAD26
SYSAD30
SYSAD27
SYSAD29
SYSAD31
SYSAD24
SYSAD20
SYSAD17
SYSAD28
SYSAD19
SYSAD25
SYSAD18
SYSAD22
SYSAD21
SYSAD16
MEMD29
MEMD3
MEMD24
MEMD25
MEMD18
MEMD29
MEMD7
MEMD16
MEMD21
MEMD2
MEMD11
MEMD23
MEMD5
MEMD17
MEMD3
MEMD23
MEMD0
MEMD10
MEMD27
MEMD7
MEMD30
MEMD10
MEMD8
MEMD8
MEMD27
MEMD14
MEMD19
MEMD31
MEMD0
MEMD21
MEMD18
MEMD16
MEMD9
MEMD24
MEMD11
MEMD13
MEMD17
MEMD1
MEMD22
MEMD15
MEMD15
MEMD20
MEMD12
MEMD13
MEMD19
MEMD31
MEMD22
MEMD2
MEMD5
MEMD30
MEMD20
MEMD26
MEMD9
MEMD12
MEMD1
MEMD25
MEMD26
MEMD4
MEMD6
MEMD28
MEMD4
MEMD28
MEMD6
MEMD14
MEMD[31:0]
8,29
IOD[15:0]
9,10,11,30
IOD[15:0]
9,10,11,30
MEMD[31:0]
8,29
IODG
9
LCS3
5,30
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
V
BR717
33Ω
1
2
3
4
5
6
7
8
ICT1929
ICT1851
IC731
74LCX245
2
3
4
5
6
7
8
9
1
19
10
20
18
17
16
15
14
13
12
11
A0
A1
A2
A3
A4
A5
A6
A7
T/R
OE
GND
VCC
B0
B1
B2
B3
B4
B5
B6
B7
C909
10pF
C899
10pF
C890
0.1uF
C891
0.1uF
C908
10pF
ICT1928
R1264
10k
ICT1927
C927
10pF
C906
10pF
BR712
33Ω
1
2
3
4
5
6
7
8
ICT1926
ICT1863
IC746A
74LCX08MTC
1
2
3
C923
10pF
ICT1925
C929
10pF
R719
5
6
7
8
ICT2129
IC736
74LCX245
2
3
4
5
6
7
8
9
1
19
10
20
18
17
16
15
14
13
12
11
A0
A1
A2
A3
A4
A5
A6
A7
T/R
OE
GND
VCC
B0
B1
B2
B3
B4
B5
B6
B7
C928
10pF
IC26B
74LCX08MTC
4
5
6
C925
10pF
C903
10pF
C926
10pF
C924
10pF
C917
10pF
R708
5
6
7
8
BR709
33Ω
1
2
3
4
5
6
7
8
C895
10pF
IC728
74LCX245
2
3
4
5
6
7
8
9
1
19
10
20
18
17
16
15
14
13
12
11
A0
A1
A2
A3
A4
A5
A6
A7
T/R
OE
GND
VCC
B0
B1
B2
B3
B4
B5
B6
B7
C887
0.1uF
C922
10pF
C905
10pF
C896
10pF
R716
5
6
7
8
C897
10pF
C888
0.1uF
C904
10pF
C919
10pF
C892
0.1uF
C913
10pF
ICT1924
C918
10pF
IC734
74LCX245
2
3
4
5
6
7
8
9
1
19
10
20
18
17
16
15
14
13
12
11
A0
A1
A2
A3
A4
A5
A6
A7
T/R
OE
GND
VCC
B0
B1
B2
B3
B4
B5
B6
B7
ICT1844
C902
10pF
ICT1923
ICT1845
C916
10pF
ICT1922
ICT1846
BR713
10kΩ
1
2
3
4
5
6
7
8
C894
10pF
R711
5
6
7
8
BR722
10kΩ
1
2
3
4
5
6
7
8
C921
0.1uF
ICT1921
BR714
10kΩ
1
2
3
4
5
6
7
8
ICT1847
BR721
10kΩ
1
2
3
4
5
6
7
8
ICT1920
BR725
10kΩ
1
2
3
4
5
6
7
8
C915
10pF
BR728
10kΩ
1
2
3
4
5
6
7
8
ICT1919
BR720
33Ω
1
2
3
4
5
6
7
8
C914
10pF
BR726
10kΩ
1
2
3
4
5
6
7
8
ICT1848
ICT1918
BR727
10kΩ
1
2
3
4
5
6
7
8
BR730
10kΩ
1
2
3
4
5
6
7
8
ICT1917
BR729
10kΩ
1
2
3
4
5
6
7
8
ICT1932
C898
10pF
C912
10pF
BR731
10kΩ
1
2
3
4
5
6
7
8
C911
0.1uF
ICT1849
BR732
10kΩ
1
2
3
4
5
6
7
8
ICT2189
ICT1931
ICT1850
C907
10pF
ICT1930
C900
10pF
C901
10pF
3
3
2
2
1
1
D
C
B
A
7/30
MX-M550/M620/M700 CIRCUIT DIAGRAM / 回路図 4 - 15
SD
SDIMM4
MEMD31
MEMD29
LA10
MEMD1
LA3
LA8
LA11
LA6
MEMD19
LA11
MEMD4
MEMD13
MEMD24
MEMD26
LA14
LA14
FMCS13
LA19
LA8
LA9
LA16
LA15
MEMD3
FMCS11
MEMD14
MEMD6
MEMD27
LA17
LA2
MEMD5
MEMD12
MEMD9
LA4
LA20
MEMD11
MEMD16
LA20
LA21
LA3
MEMD17
LA7
MEMD20
MEMD22
LA5
FMCS9
LA12
MEMD8
MEMD2
LA13
LA21
LA13
MEMD7
MEMD18
LA18
LA17
MEMD28
LA4
MEMD15
MEMD25
MEMD10
LA7
LA2
LA10
LA19
LA18
LA16
LA12
LA5
MEMD21
MEMD30
LA15
MEMD23
LA6
LA9
MEMD0
FMCS12
FMCS9_1
FMCS9_2
7
ROMWE
3,7,9,28
COLDRST
1,2,23,28
ROMOE
3,9,28,29
FMCS13
9
LA[22:2]
7,9,29
FL_WP
30
FMCS10
9
FMCS9
9
RD/BY
28
FMCS11
9
MEMD[31:0]
7,29
FMCS8
9
FMCS12
9
CODECS3
3
FONTCS0
3,28
FL_VCCW
30
3.3V
3.3V
3.3V
CN4
DMM2-SD72A-1131
12
13
14
15
16
17
18
28
31
32
40
41
42
43
44
46
47
11
19
2
3
4
5
6
7
8
9
21
22
23
24
25
26
27
35
37
38
49
50
51
52
53
54
56
57
58
60
59
62
63
64
45
48
55
10
30
61
1
20
39
29
33
34
36
65
66
67
68
69
70
71
72
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
1CE
NC
2CE
NC
OE
WP
WE
NC
RP
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
RY/BY
BYTE
VCCW
VCC
NC
VCC
GND
GND
GND
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
NC
C66
0.1uF
C1081
0.1uF
IC756A
74LCX08MTC
1
2
3
R93
10K
CN5
DMM2-S
12
13
14
15
16
17
18
28
31
32
40
41
42
43
44
46
47
11
30
1
20
39
29
33
34
36
65
66
67
68
69
70
71
72
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
1CE
NC
2CE
NC
OE
WP
WE
NC
NC
GND
GND
GND
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
NC
R
140
0
NO
ASM
R141
0
C77
0.1uF
IC756B
74LCX08MTC
4
5
6
5
5
4
4
3
3
D
C
B
A
MFP CONTROL PWB (FLASH DIMM) (MX-M550N/M550U/M550)
MX-M550/M620/M700 CIRCUIT DIAGRAM / 回路図 4 - 16
SDIMM5
SDIMM6
PS-J ROM
ASM ONLY FOR JAPAN
MEMD23
MEMD5
LA5
MEMD29
MEMD8
MEMD15
MEMD24
LA4
LA12
LA17
MEMD26
MEMD22
FMCS4
MEMD2
MEMD1
LA3
MEMD10
MEMD31
MEMD14
MEMD17
LA11
LA17
MEMD6
MEMD7
MEMD28
MEMD22
LA3
MEMD26
LA21
MEMD20
LA15
LA16
MEMD25
MEMD5
MEMD27
MEMD6
MEMD16
MEMD19
MEMD24
MEMD28
FMCS0
MEMD8
MEMD31
LA4
MEMD11
MEMD3
MEMD30
MEMD26
MEMD14
MEMD17
MEMD21
LA6
MEMD12
MEMD7
LA14
MEMD13
MEMD12
MEMD18
MEMD20
LA20
LA20
LA8
MEMD9
LA9
MEMD21
LA16
MEMD1
MEMD16
MEMD11
MEMD0
MEMD12
MEMD24
MEMD7
MEMD2
MEMD30
MEMD0
MEMD14
MEMD2
MEMD28
LA6
MEMD22
MEMD10
MEMD25
MEMD21
MEMD23
MEMD20
MEMD29
MEMD15
LA19
MEMD9
LA18
LA11
LA12
MEMD10
MEMD3
MEMD29
MEMD27
LA13
LA22
MEMD6
MEMD13
MEMD3
LA19
MEMD11
MEMD18
MEMD19
MEMD4
LA8
LA2
LA18
LA13
LA7
FMCS2
MEMD17
MEMD13
MEMD1
LA15
LA5
MEMD9
LA14
MEMD27
MEMD4
LA10
LA9
MEMD19
LA21
MEMD18
MEMD16
MEMD8
FMCS6
MEMD0
MEMD23
LA7
MEMD5
MEMD15
MEMD31
MEMD25
LA2
LA10
MEMD30
MEMD4
FMCS2
9
FOE2
7
FMCS4
9
FWE2
7
FMCS6
9
FMCS0
9
3.3V
3.3V
3.3V
3.3V
3.3V
C
141
0.
1uF
C67
0.1uF
C79
0.1uF
C65
0.1uF
CN7
DMM-100G-133FNK31
28
78
29
79
30
80
31
81
32
82
33
83
34
84
35
85
36
86
37
87
38
88
39
89
40
90
41
91
42
92
43
93
18
68
19
69
20
70
21
71
22
23
72
73
26
24
25
4
54
5
6
45
46
55
56
95
96
1
2
49
50
51
52
99
100
7
57
8
58
9
59
10
60
11
61
12
62
13
63
14
64
15
65
16
66
17
97
53
98
67
74
75
76
77
3
27
47
48
44
94
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
NC
NC
Vpp
Vpp
Vpp
Vpp
NC
NC
OE_
WE_
RP
BYTE_
NC
WP_
RY/BY_
Vpp
Vpp
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
Vcc
GND
GND
GND
GND
GND
GND
GND
GND
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
NC
NC
GND
A21
CE0_
CE1_
CE2_
CE3_
NC
NC
NC
GND
NC
NC
CN6
DMM2-SD72A-1131
12
13
14
15
16
17
18
28
31
32
40
41
42
43
44
46
47
11
19
2
3
4
5
6
7
8
9
21
22
23
24
25
26
27
35
37
38
49
50
51
52
53
54
56
57
58
60
59
62
63
64
45
48
55
10
30
61
1
20
39
29
33
34
36
65
66
67
68
69
70
71
72
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
1CE
NC
2CE
NC
OE
WP
WE
NC
RP
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
RY/BY
BYTE
VCCW
VCC
NC
VCC
GND
GND
GND
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
NC
M2-SD72A-1131
19
2
3
4
5
6
7
8
9
21
22
23
24
25
26
27
35
37
38
49
50
51
52
53
54
56
57
58
60
59
62
63
64
45
48
55
10
61
RP
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
RY/BY
BYTE
VCCW
VCC
VCC
D
D
D
+
C952
10uF/16V
1
2
C953
0.1uF
C
142
0.
1uF
+
C
136
22
uF/
16
V
R166
0
3
3
2
2
1
1
D
C
B
A
8/30
MX-M550/M620/M700 CIRCUIT DIAGRAM / 回路図 4 - 17
POWER_LED
B
PCIREQ3
PCIREQ6
PCIREQ7
PCIREQ0
PCIREQ1
PCIREQ4
PCIREQ5
PCIREQ2
FL_MSK0
CD1
CD3
CD4
CD6
FL_MSK3
FL_MSK4
EEPROMCS
FL_MSK2
FL_MSK1
SRWE
SROE
CD7
CD2
CD5
FL_MSK5
FL_MSK6
CD0
IOA3
IOA5
IOA9
IOA13
IOA6
IOA11
IOA14
IOA12
IOA2
IOA15
IOA7
IOA10
IOA1
IOA8
IOA4
3,28
LOE
3,7,11,28,30
ICUOFF
16,17
PWM
14
FMCS11
8
BT_CK
11
FMCS13
8
3,28
BOOTCS
3,7,28
FMCS6
8
IOA[17:1]
7,10,11,30
3,28
IORESET1
22
3,28
ASICCLK
21
ENERGY
10
SDA_RWE
11
3,28
BT_OK
11
DREQ0
3,28
5
WP
30
5
3,28
NPOR
19
PCIINTA
4,15,16,18,25,27
PCIREQ[7:0]
4,15,16,18,25,27,28
CLKOFF
19
3,28
PFRAME0
4,15,16,18,25,27
+12VFAN
22
FMCS4
8
MODECLK
1,23,30
FB_IN
28
PCLK_A
21
3,28
FMCS12
8
PCIINTB
18
LA22
7,8,29
EXTRST
11,22
SLCTIN_P
7
FMCS8
8
ROMOE
3,8,28,29
3,28
LA18
7,8,29
5
LWE
3,11,28,30
ROMWE
3,7,8,28
DACK0
3,28
TDPOF
1,22
FMCS2
8
PONRST
2,10,11,22,23,30
FWE
21
SCN_SET
14
PM22B_RST
20
FMCS0
8
CPURST
1,2,10,16,18,20,23,25
STC0
3,28
3,28
FMCS9
8
FMCS10
8
IOA[17:1]
7,10,11,30
FOE
7,29
PRDY
14
DCCNT
14
SIOCLK
3
FMCS18
29
FMCS17
29
FMCS16
29
FMCS15
29
FMCS14
29
CNCT_FAX_A
22
WP_FAX
28
FMCS19
29
CNUPDATE_SW
30
MSW_MON_P
14,23
PROFF_CNT
14
LED_GND
14
PM1075_RST 20
VPP_SW
30
FAN_MON
17
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
3.3V
+5VS
+12V
3.3V
3.3V
ICT1118
ICT122
R
861
10
K
N
O
ASM
R
163
10
K
ICT1040
R
862
0
R
851
10
K
N
O
ASM
ICT
200
ICT1328
R
853
10
K
N
O
ASM
ICT1119
ICT301
ICT1329
R
857
10
K
N
O
ASM
ICT1041
ICT397
R
1090
56
K
ICT1822
ICT1330
R
1091
56
K
R
859
10
K
IC747C
74LCX32MTC
9
10
8
ICT125
ICT245
IC747B
74LCX32MTC
4
5
6
ICT
R
852
0
R
854
0
ICT2059
R
258
1K
N
O
ASM
ICT650
R162
4.7K
R1068
33
C976
1000pF
R
833
10
K
ICT165
R
858
0
ICT205
R
860
0
NO
A
S
M
R
834
0
NO
A
S
M
ICT2176
BR743
10kΩ
1
2
3
4
5
6
7
8
R
836
0
R
257
1K
N
O
ASM
ICT206
R184
4.7K
ICT128
R
160
10
K
R
838
0
R
974
10
K
ICT207
ICT123
ICT208
R197
0
NO ASM
R
840
0
NO
A
S
M
ICT1820
R1141
47
NO ASM
ICT1385
ICT210
ICT1113
R
842
0
NO
A
S
M
C962
100pF
NO ASM
IC64B
74LCX14MTC
3
4
ICT
201
CPU INIT
FLASH
SRAM
EEPROM
I/O PORT
PARALLEL
uPD65946GN-P07-LMU
IC32-1
232
231
238
234
233
137
138
114
115
116
117
118
119
123
124
125
126
127
128
129
130
131
132
133
134
135
136
146
147
144
145
141
99
226
225
142
218
219
227
91
92
93
94
95
96
97
108
109
98
102
224
143
228
104
105
106
107
103
173
175
174
177
176
182
178
183
154
156
155
158
157
162
159
163
152
153
164
165
166
171
46
167
168
169
170
47
172
222
223
COLDRST
PONRST
SYSCLK
GRESET
RESET
FWE
FOE
FMCS19
FMCS18
FMCS17
FMCS16
FMCS15
FMCS14
FMCS13
FMCS12
FMCS11
FMCS10
FMCS9
FMCS8
FMCS7
FMCS6
FMCS5
FMCS4
FMCS3
FMCS2
FMCS1
FMCS0
SRWE
SROE
SRCS1
SRCS0
EEPROMCS
RD_BY
POF
SERMSTR_IN
BT_OK
FB_IN
FAX_IN
MSW
FL_MSK6
FL_MSK5
FL_MSK4
FL_MSK3
FL_MSK2
FL_MSK1
FL_MSK0
DIPSW1
DIPSW0
WP
SCL
PWM
BT_CK
PM22EN
LED3
LED2
LED1
LED0
SDA
PIO7
PIO5
PIO6
PIO3
PIO4
PIO1
PIO2
PIO0
CD7
CD5
CD6
CD3
CD4
CD1
CD2
CD0
ACK
BUSY
PE
FAULT
SLCT
REVERSE
DREQ0
INIT
SLCTIN
AUTOFD
STB
DACK0
STC
EXTRST
SCANIN
ICT209
ICT1115
ICT1821
R
844
0
IC64D
74LCX14MTC
9
8
R
845
10
K
R1173
33
ICT278
ICT126
ICT1322
IC747A
74LCX32MTC
1
2
3
ICT224
R
848
0
R
157
0
NO
ASM
ICT44
R206
4.7K
ICT1323
ICT2177
R
835
10
K
N
O
ASM
R
156
0
NO
ASM
R
837
10
K
N
O
ASM
R
843
10
K
N
O
ASM
ICT1324
R
850
0
R
158
10
K
ICT1116
R
839
10
K
ICT1837
BR744
10kΩ
1
2
3
4
5
6
7
8
R213
10K
ICT1325
R
841
10
K
R
155
0
NO
ASM
ICT193
C
339
100
pF
D
17
LED
NO
ASM
R818
0 NO ASM
R198
0
R201
0
NO ASM
ICT194
ICT
202
ICT230
ICT124
ICT
203
R
159
10
K
C
341
100
pF
ICT195
D
18
LED
NO
ASM
ICT1198
ICT129
R
846
0
NO
A
S
M
R478
4.7K
ICT2130
C201
0.1uF
ICT211
ICT197
BR739
10kΩ
1
2
3
4
5
6
7
8
C
340
100
pF
R236
1K
C975
1000pF
R819
0
R
847
10
K
N
O
ASM
R
849
10
K
N
O
ASM
D13
LTL-1LHEE-002A
ICT1326
ICT
204
IC43A
74LCX14MTC
1
2
ICT2148
ICT127
ICT120
ICT39
ICT1327
ICT2012
ICT1039
ICT162
ICT2149
ICT121
ICT177
ICT1836
5
5
4
4
3
3
D
C
B
A
MFP CONTROL PWB (ASIC1) (MX-M550N/M550U/M550)
Click on the first or last page to see other MX-M550U / MX-M620U (serv.man2) service manuals if exist.