SAMSUNG ML-5100A Service Manual
SERVICE
LASER PRINTER
ML-5100A
Manual
LASER PRINTER CONTENTS
1. Precautions
2. Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. Exploded Views and Parts List
6. Electrical Parts List
7. Schematic Diagrams
7-1 Controller 1/9
33R154
R42
470
C11
0.1UF
C69
18PF
C13
0.1UF
18PF
C80
18PF
C67
C68
18PF
C21
0.1UF
C25
0.1UF
33R8
74F14
U35-1
12
C82
18PF
R130
1K
R46
10K
13
12
11
U35-6
74F14
13 12
U36-3
74F08
9
10
8
74F08
U36-4
33R14
18PF
C51
18PF
C56
C7
0.1UF
VCC
C23
0.1UF
18PF
C57
VCC
R13 33
C74
18PF
18PF
C73
C52
18PF
18PF
C72
C71
18PF
R11 33
33UF/16V
C1
33R2
R45
10K
R29 33
33
R142
10K
R44
18PF
C84
R25
R10 33
R7 33
33
0.1UF
C6
R6 33
33R18
33R19
0.1UF
C16
33R21
0.1UF
C47
R17 33
18PF
220PF
C301
FILTER_22NF
LF4
123
C79
74F14
U35-2
34
33R5
33R30
18PF
C54
0.1UF
C20
18PF
C81
18PF
C85
C77
18PF
R1 33
C53
18PF
10K
R43
VCC
0.1UF
C24
33R12
R23 33
R16 33
C83
18PF
VCC_U1
C58
18PF
VCC
R20 33
R32 33
33R31
C160
0.1UF
33R28
0.1UF
C192
C161
10NF
18PF
C78
C55
18PF
33
33R15
0.1UF
C22
R26
C17
0.1UF
33R3
R159 0
33R9
C64
18PF
18PF
C66
18PF
C70
C15
0.1UF
18PF
C75
0.1UF
C12
R22 33
0.1UFC90.1UF
C10
VCC
VCC_U1
33R24
R4 33
69
72
nRCS1
nRCS2
73
74
nRCS3
195
nRESET
28
nSC5
nSELECT_IN
11
nSRD0
144
nSRD1
146
12
nSTROBE
145
nSWR0
147
nSWR1
nWE0
33
34
nWE1
35
nWE2
nWE3
36
29
30
nECS1
nECS2
31
32
nECS3
169
nENGHSYNC
nENGPRQ
166
171
nENGREADY
nFAULT
19
14
nINITIAL
37
nOE
nRAS0
122
123
nRAS1
nRAS2
124
125
nRAS3
126
nRAS4
nRAS5
127
nRCS0
80
95
VDD8
103
VDD9
VIDEO_OUT
173
WTROUT
194
15
nACK
nAUTOFD
13
nBK0HW
198
121
nCAS0
nCAS1
118
nCAS2
117
116
nCAS3
172
nCPUPRINT
nCPUPSYNC
170
nDOE
115
114
nDWE
nECS0
165
VDD1
20
VDD10
113
142
VDD11
143
VDD12
VDD13
167
168
VDD14
VDD15
183
VDD16
184
199
VDD17
VDD18
200
21
VDD222VDD3
VDD4
46
61
VDD5
VDD662VDD7
8
9
PPD6
PPD7
10
151
RXD
SELECT
17
153
SIO_RXD
SIO_TXD
152
TCK
208
TDI
202
203
TDO
TMODE
197
204
TMS
TXD
150
196
TnRST
UCLK
156
VCLK0
164
VCLK1
GPIO15
GPIO2
177
178
GPIO3
GPIO4
179
180
GPIO5
181
GPIO6
GPIO7
182
GPIO8
185
186
GPIO9
MCLK
206
18
PERROR
PPD0
3
4
PPD1
PPD2
5
6
PPD3
7
PPD4
PPD5
GND23
GND24
207
GND3
26
27
GND4
GND5
38
39
GND6
GND7
52
53
GND8
GND9
70
175
GPIO0
GPIO1
176
187
GPIO10
GPIO11
188
189
GPIO12
GPIO13
190
GPIO14
191
192
25
GND1
1
71
GND10
GND1188GND12
104
105
GND13
GND14
119
120
GND15
GND16
134
154
GND17
GND18
155
157
GND19
2
GND2
GND20
159
174
GND21
GND22
193
205
129
DA10
139
140
DA11
DA12
141
DA2
130
131
DA3
DA4
132
133
DA5
135
DA6
DA7
136
137
DA8
DA9
138
DSR
148
149
DTR
24
EXMACK
EXMREQ
23
EXTNWAIT
D24
D25
106
107
D26
108
D27
D28
109
110
D29
78
D3
D30
111
D31
112
D4
79
81
D5
D6
82
83
D7
D8
84
85
D9
128
DA0
DA1
D1
D10
86
87
D11
D12
89
90
D13
D14
91
92
D15
D16
93
94
D17
D18
96
97
D19
D2
77
D20
98
99
D21
D22
100
D23
101
102
A23
43
A3
A4
44
45
A5
A6
47
48
A7
A8
49
50
A9
16
BSY
201
CLKSEL
158
COMCLK
CnEBSY
162
163
CnEMSG
CnPESY
160
161
CnPMSG
D0
75
76
40
41
A1
A10
51
54
A11
A12
55
56
A13
A14
57
58
A15
A16
59
60
A17
A18
63
64
A19
A2
42
A20
65
66
A21
A22
67
68
KS32C6100
U1
A0
C59
18PF
18PF
C61
U36-1
74F08
12
3
18PF
C60
18PF
VCC
R27 33
C76
U30
7705A
3
CT
GND
4
REF
1
6
RES
7
SEN
VCC
8
_RES
5
2
_RIN
C62
18PF
VCC
0
R187
18PF
C63
0.1UF
C18
0.1UF
C14
C65
18PF
C191
33UF/16V
C19
0.1UF
74F08
U36-2
4
5
6
RXD
33R153
TXD
A(13)
A(12)
A(11)
A(10)
A(9)
A(8)
A(7)
A(6)
A(5)
A(4)
A(3)
A(2)
A(1)
A(0)
VIDEO*
nECS0
nECS1
VBUS
EIRQ0*
WE(0)
nRAS(0:5)
PP_STROBE*
DA(0:12)
RESET*
WTROUT
LSYNC*
A(23)
A(22)
A(21)
A(20)
A(19)
A(18)
A(17)
A(16)
A(15)
A(14)
nCAS(1)
nCAS(2)
nCAS(3)
nDWE
MC_FAULT*
PP_INIT*
OE*
nRAS(0)
nRAS(2)
nRAS(3)
nRCS(0)
nRCS(2)
PP_SELIN*
PPD(3)
PPD(4)
PPD(5)
PPD(6)
PPD(7)
MC_SELECT
WTROUT
MC_ACK*
PP_AUTOFD*
nCAS(0)
GPIO(2)
LED(1)
LED(2)
LED(3)
E2PROM_DO
DPO_RST*
E2PROM_DI
MC_PERROR
PPD(0)
PPD(1)
PPD(2)
DA(2)
DA(3)
DA(4)
DA(5)
DA(6)
DA(7)
DA(8)
DA(9)
PANEL_KEY
WR_FLASH
DEMO*
SEL_DEMO
EXITP*
E2PROM_CS
E2PROM_SK
DA(5)
DA(6)
DA(7)
DA(8)
DA(9)
DA(10)
SYSCLK
VCLK
MC_BUSY
DA(0)
DA(1)
DA(10)
EBSY*
EMSG*
PSYNRQ*
READY*
PRINT*
nRCS(0:2)
nCAS(0:3)
PPD(0:7)
D(0:31)
A(0:23)
DA(0)
DA(1)
DA(2)
DA(3)
DA(4)
D(27)
D(28)
D(29)
D(30)
D(31)
TDO
CCLK*
CBSY*
CMSG*
D(19)
D(20)
D(21)
D(22)
D(23)
D(24)
D(25)
D(26)
D(11)
D(12)
D(13)
D(14)
D(15)
D(16)
D(17)
D(18)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(8)
D(9)
D(10)
A(23)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
TnRST
D(0)
D(1)
A(0)
A(1)
A(10)
A(11)
A(12)
A(13)
A(14)
A(15)
A(16)
A(17)
A(18)
A(19)
A(2)
A(20)
A(21)
A(22)
7-2
Samsung Electronics
Schematic Diagrams
Controller 2/9
0.1UF
C181
21
VCC3
13
WR*
C110
22PF
R69 10
10
DQ8
DQ9
33
GND1
22
37
GND2
GND3
42
31
LCAS*
16
NC1
NC2
15
NC3
11
NC4
12
32
NC5
OE*
29
14
RAS*
UCAS*
30
1
VCC1
VCC2
6
27
A8
A9
28
DQ1
2
34
DQ10
DQ11
35
36
DQ12
DQ13
38
39
DQ14
DQ15
40
41
DQ16
3
DQ2
DQ3
4
5
DQ4
DQ5
7
8
DQ6
DQ7
9
U4
KM416C1200
17
A0
A1
18
19
A2
A3
20
23
A4
A5
24
25
A6
A7
26
VCC
R132 10
C32
0.1UF
VCC
R57 10
10R68
C2
33UF/16V
VCC
C104
47PF
10R67
0.1UF
C37C36
0.1UF
R76 10
10R73
R66 10
10R74
10R79
47PF
C107
0.1UF
C33 C34
0.1UF
C165
22PF
1
6
VCC2
VCC3
21
WR*
13
10R56
8
9
DQ7
DQ8
10
33
DQ9
22
GND1
GND2
37
42
GND3
LCAS*
31
NC1
16
15
NC2
11
NC3
12
NC4
NC5
32
29
OE*
RAS*
14
30
UCAS*
VCC1
25
26
A7
A8
27
28
A9
2
DQ1
DQ10
34
35
DQ11
DQ12
36
38
DQ13
DQ14
39
40
DQ15
DQ16
41
DQ2
3
4
DQ3
DQ4
5
7
DQ5
DQ6
KM416C1200
U3
A0
17
18
A1
A2
19
20
A3
A4
23
24
A5
A6
C182
0.1UF
VCC
R58
0.1UF
C183
47PF
C105
10
R80 10
22PF
22PF
C111
10R70
C108
R72 10
GND1
GND2
39
72
GND3
PD0
67
68
PD1
PD2
69
70
PD3
RAS0*
44
45
RAS1*
RAS2*
34
33
RAS3*
47
WRITE*
R83
10
50
52
DQ28
DQ29
54
DQ3
8
56
DQ30
DQ31
58
60
DQ32
DQ33
62
64
DQ34
DQ35
38
20
DQ4
DQ5
22
24
DQ6
DQ7
26
36
DQ8
DQ9
49
1
DQ12
DQ13
57
61
DQ14
DQ15
63
65
DQ16
DQ17
37
3
DQ18
DQ19
5
6
DQ2
7
DQ20
DQ21
9
21
DQ22
DQ23
23
25
DQ24
DQ25
27
35
DQ26
DQ27
18
28
A7
A8
31
32
A9
29
BS0*
BS1*
46
66
BS2*
BS3*
71
40
CAS0*
CAS1*
43
41
CAS2*
CAS3*
42
2
DQ0
DQ1
4
51
DQ10
DQ11
53
55
SIMM
J7
10
+5V_1
+5V_2
30
59
+5V_3
A0
12
13
A1
A10
19
A2
14
15
A3
A4
16
17
A5
A6
0.1UF
C35
R71 10
C112
22PF
10R75
R55 10
22PF
C109
10R77
10R131
CAS(1)
CAS(0)
CAS(3)
CAS(2)
RAS(2)
RAS(3)
DW*
DAA(0:10)
DEMO*
RESET*
SEL_DEMO
D(5)
D(6)
D(7)
D(8)
D(9)
D(10)
D(11)
D(12)
D(13)
D(14)
D(15)
D(16)
D(17)
D(18)
D(19)
D(20)
D(21)
D(22)
D(23)
D(24)
D(25)
D(26)
D(27)
D(28)
D(29)
D(30)
D(31)
D(0:31)
DAA(10)
RAS(0)
RAS(2)
RAS(3)
CAS(0)
CAS(1)
CAS(2)
CAS(3)
nRAS(0:5)
DAA(0) D(0)
DAA(1)
DAA(2)
DAA(3)
DAA(4)
DAA(5)
DAA(6)
DAA(7)
DAA(8)
DAA(9)
DAA(10)
D(1)
D(2)
D(3)
D(4)
DAA(1)
DAA(0)
nDWE DW*
DA(0)
DA(1)
DA(2)
DA(3)
DA(4)
DA(5)
DA(6)
DA(7)
DA(8)
DA(9)
DA(10)
DA(0:12)
DAA(0)
DAA(1)
DAA(2)
DAA(3)
DAA(4)
DAA(5)
DAA(6)
DAA(7)
DAA(8)
DAA(9)
D(16)
D(25)
D(26)
D(27)
D(28)
D(29)
D(30)
D(31)
D(17)
D(18)
D(19)
D(20)
D(21)
D(22)
D(23)
D(24)
DAA(9)
DAA(8)
DAA(7)
DAA(6)
DAA(5)
DAA(4)
DAA(3)
DAA(2)
nRAS(3)
CAS(3)
CAS(0)
DW*
RAS(0)
DW*
CAS(1)
RAS(0)
DAA(9)
D(0)
D(9)
D(10)
D(11)
D(12)
D(13)
D(14)
D(15)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(8)
DAA(0)
DAA(1)
DAA(2)
DAA(3)
DAA(4)
DAA(5)
DAA(6)
DAA(7)
DAA(8)
CAS(2)
nCAS(0:3)
nCAS(1)
nCAS(0)
nCAS(2)
nCAS(3)
nRAS(0)
nRAS(2)
7-3
Samsung Electronics
Schematic Diagrams
Controller 3/9
N.A
(H)
(L)
(H)
KM23C16005BG
(L)
KM23C16005BG
10K
22PF
C158
21
24
D4
D5
26
28
D6
D7
30
16
D8
D9
18
NC1
1
43
NC2
NC3
44
14
OE*
VCC
23
VSS1
13
32
VSS2
R134
A5
A6
5
4
A7
A8
42
41
A9
33
BHE
CE*
12
15
D0
D1
17
20
D10
D11
22
25
D12
D13
27
29
D14
D15
31
19
D2
D3
A0
11
10
A1
A10
40
39
A11
A12
38
37
A13
A14
36
35
A15
A16
34
3
A17
A18
2
A2
9
8
A3
A4
7
6
VCC
VCC
U28
VCC
R125 100
68R126
C120
22PF
0.1UF
C185
VSS2
32
WE*
43
VCC
10KR133
27
D13
D14
29
31
D15
D2
19
21
D3
D4
24
26
D5
D6
28
30
D7
D8
16
18
D9
OE*
14
44
RESET*
1
RY_BY*
23
VCC
13
VSS1
2
A18
9
A2
A3
8
7
A4
A5
6
5
A6
A7
4
42
A8
A9
41
BYTE*
33
12
CE*
D0
15
17
D1
D10
20
22
D11
D12
25
VCC
23
VSS1
13
32
VSS2
MBM29F800B
U31
11
A0
A1
10
40
A10
A11
39
38
A12
A13
37
36
A14
A15
35
34
A16
A17
3
25
D12
D13
27
29
D14
D15
31
19
D2
D3
21
24
D4
D5
26
28
D6
D7
30
16
D8
D9
18
NC1
1
43
NC2
NC3
44
14
OE*
3
A17
A18
2
A2
9
8
A3
A4
7
6
A5
A6
5
4
A7
A8
42
41
A9
33
BHE
CE*
12
15
D0
D1
17
20
D10
D11
22
U27
A0
11
10
A1
A10
40
39
A11
A12
38
37
A13
A14
36
35
A15
A16
34
R147 0
C189
0.1UF
U34-1
74F32
1
2
3
0R146
74F32
U34-2
4
5
6
32
WE*
43
D13
D14
29
31
D15
D2
19
21
D3
D4
24
26
D5
D6
28
30
D7
D8
16
18
D9
OE*
14
44
RESET*
1
RY_BY*
23
VCC
13
VSS1
VSS2
A18
9
A2
A3
8
7
A4
A5
6
5
A6
A7
4
42
A8
A9
41
BYTE*
33
12
CE*
D0
15
17
D1
D10
20
22
D11
D12
25
27
VCC
MBM29F800B
U32
11
A0
A1
10
40
A10
A11
39
38
A12
A13
37
36
A14
A15
35
34
A16
A17
3
2
R95 68
22PF
C190C121
22PF
0.1UF
C187
R145 0
C188
0.1UF
U34-3
74F32
9
10
8
VCC
74F32
U34-4
12
13
11
VCC
22PF
C157
68R84
SEL2
SEL1
OE#
F_RD*
F_WE*
WR_FLASH
WE(0)
W8
RY_BY*
C186
0.1UF
A(21)
A(20)
A(0:23)
A(19)
F_WE* F_WE*
RCS0*
SEL1
RCS0* RCS0*
RESET* RESET*
F_RD*
RCS2*
nRCS(0)
OE*
RCS0*
nRCS(2) RCS2*
OE#
F_RD*
RCS2*
GPIO(2)
OE# OE#
SEL2
A(18)
D(13)
D(14)
D(15)
D(0)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(0:31)
D(24)
D(25)
D(26)
D(27)
D(28)
D(29)
D(30)
D(31)
D(16)
D(17)
D(18)
D(19)
D(20)
D(21)
D(22)
D(23)
RY_BY*
A(21)
A(20)
A(19)
A(11)
A(12)
A(13)
A(14)
A(15)
A(16)
A(17)
A(18)
A(0)
A(1)
A(2)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
A(10)
A(11)
A(12)
A(13)
A(14)
A(15)
A(16)
A(17)
A(18)D(8)
D(9)
D(10)
D(11)
D(12)
D(13)
D(14)
D(15)
D(16)
D(17)
D(18)
D(19)
D(20)
D(21)
D(22)
D(23)
D(24)
D(25)
D(26)
D(27)
D(28)
D(29)
D(30)
D(31)
A(0)
A(1)
A(2)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
A(10)
A(0)
A(1)
A(2)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
A(10)
A(11)
A(12)
A(13)
A(14)
A(15)
A(16)
A(17)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
D(8)
D(9)
D(10)
D(11)
D(12)
A(0)
D(0)
A(1)
A(2)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
A(10)
A(11)
A(12)
A(13)
A(14)
A(15)
A(16)
A(17)
7-4
Samsung Electronics
Schematic Diagrams
Controller 4/9
N.A
1K
R33 33
VCC
22PF
C177
0.1UF
47PF
C176
R140
MODOUT_RS1
6
1
OSCIN
OSCOUT
2
7
REFOUT_RS0
3
REF_OFF
VDD
8
5
VSS
2.2KR129
C166
18PF
C167
U29
FS741
LF
4
VCC
10R143
LF5
FILTER_22NF
123
10UF
C162
R144 33
1K
R139
4
VCC
0R148
C48
68PF
DXO-1H-66M
OSC1
CLK
3
2
GND NC
1
10R34
FILTER_22NF
LF1
123
SYSCLK
0.1UF
C8
7-5
Samsung Electronics
Schematic Diagrams
Controller 5/9
1K
R102
R91 33
R111
5.1K
C130
C171
100PF
CEN_5V
R98
1K
5V1
100PF
C178
100PF
C170
VCC
100PF100PF
C129
33R37
R115
1K
R94 33
R88 33
33R92
1K
R116
R39 33
C180
100PF
R106
1K
1KR97
C179
100PF
33R150
5V2
5V1
LF3
FILTER_22NF
123
A9
9
33R90
R99 0
C175
100PF
27
A27
A28
28
29
A29
A3
3
A30
30
31
A31
A32
32
33
A33
A34
34
35
A35
A36
36
4
A4
A5
5
6
A6
A7
7
8
A8
12
A12
A13
13
14
A14
A15
15
16
A16
A17
17
18
A18
19
A19
2
A2 A20
20
21
A21
A22
22
23
A23
A24
24
25
A25
A26
26
R108
1K
C3
33UF/16V
SENT36
J1
A1
1
10
A10
A11
11
100PF
1K
R104
R112
5.1K
CEN_5V
5.1K
R110
R105
1K
C164
R113
5.1K
33R40
100PF
C169
FGND
33R93
33R127
C5
57
C6 C7
89
C8 C9
10
6 GND1
GND2
16
C128
100PF
U33
74F1071
C1
1
11
C10 C11
12 13
C12 C13
14 15
C14 C15
17 18
C16 C17
19 20
C18
2
C2 C3
34
C4
33
R114
1K
5.1K
R109
100PF
C172
R89
100PF
C174
1NF
C139
1K
R103
R36 33
5V2
100PF
C168
100PF
100PF
C163
33R87
C173
R128 33
33R59
33R38
R107
1K
CEN_5V
R101
1K
PP_AUTOFD*
PP_SELIN*
MC_SELECT
MC_PERROR
MC_BUSY
MC_ACK*
PPD(0)
PPD(1)
PPD(2)
PPD(3)
PPD(4)
PPD(5)
PPD(6)
PPD(7)
PP_STROBE*
PPD(0:7)
PP_INIT*
MC_FAULT*
7-6
Samsung Electronics
Schematic Diagrams
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