SAMSUNG ML-6050 Service Manual
SERVICE
LASER PRINTER
ML-6050
QwikLaser 6050
LASER PRINTER CONTENTS
1. Precautions
2. Specifications
3. Reference Information
4. Disassembly and Reassembly
5. Troubleshooting
6. Exploded Views and Parts List
7. Electrical Parts List
8. Schematic Diagrams
MANUAL
Samsung Electronics
8-1. Engine Controller (1/6)
Samsung Electronics 8-1
VCC
RA33
RA1
12
34
56
78
18PF
C70
4
56
78
RA12
RA33
12
34
56
78
RA10
12
34
56
78
RA33
RA9
12
3
C77
18PF
C160
0.1UF
RA33
12
34
56
78
R130
1K
RA33
RA6
0.1UF
C192
6
78
0.1UF
C14
RA5
RA33
12
34
5
C191
33UF/16V
RA33
RA14
12
34
56
78
0.1UF
C22
RA11
RA33
12
34
56
78
C74
18PF
18PF
C73
C62
18PF
78
18PF
C63
VCC_U1
RA8
RA33
12
34
56
33UF/16V
C1
6
78
C52
18PF
C83
18PF
RA33
RA7
12
34
5
C58
18PF
0.1UF
C20
0.1UF
C6
C23
0.1UF
18PF
C84
0.1UF
C18
18PF
C81
C59
18PF
18PF
C61
0.1UF
C12
C161
10NF
18PF
C60
C15
0.1UF
18PF
C75
C19
0.1UF
74F08
U36-2
4
5
6
33R153
10K
R43
RA13
RA33
12
34
56
78
18PF
C54
R46
10K
VCC
R159 0
33R154
18PF
C85
C13
0.1UF
R42
470
C7
0.1UF
VCC
33
R142
10K
R44
13
12
11
U36-3
74F08
9
10
8
74F08
U36-4
18PF
C66
C64
18PF
18PF
C57
0.1UF
C47
4
REF
1
6
RES
7
SEN
VCC
8
_RES
5
2
_RIN
0
R290
U30
7705A
3
CT
GND
18PF
C56
18PF
C72
C71
18PF
10K
VCC
R45
0.1UF
C16
13 12
U35-6
74F14
2
3
74F14
U35-2
34
FILTER_22NF
LF4
1
U36-1
74F08
12
3
C65
18PF
VCC
C17
0.1UF
18PF
C51
0.1UF
C10
C53
18PF
0.1UF
C9
VCC
0.1UF
C24
C55
18PF
74F14
U35-1
12
C82
18PF
nSELECT_IN
11
nSRD0
144
nSRD1
146
12
nSTROBE
145
nSWR0
147
nSWR1
nWE0
33
34
nWE1
35
nWE2
nWE3
36
VCC
171
nENGREADY
nFAULT
19
14
nINITIAL
37
nOE
nRAS0
122
123
nRAS1
nRAS2
124
125
nRAS3
126
nRAS4
nRAS5
127
nRCS0
69
72
nRCS1
nRCS2
73
74
nRCS3
195
nRESET
28
nSC5
nAUTOFD
13
nBK0HW
198
121
nCAS0
nCAS1
118
nCAS2
117
116
nCAS3
172
nCPUPRINT
nCPUPSYNC
170
nDOE
115
114
nDWE
nECS0
29
30
nECS1
nECS2
31
32
nECS3
169
nENGHSYNC
nENGPRQ
166
168
VDD14
VDD15
183
VDD16
184
199
VDD17
VDD18
200
21
VDD222VDD3
VDD4
46
61
VDD5
VDD662VDD7
80
95
VDD8
103
VDD9
VIDEO_OUT
173
WTROUT
194
15
nACK
SIO_TXD
152
TCK
208
TDI
202
203
TDO
TMODE
197
204
TMS
TXD
150
196
TnRST
UCLK
156
VCLK0
164
VCLK1
165
VDD1
20
VDD10
113
142
VDD11
143
VDD12
VDD13
167
GPIO7
182
GPIO8
185
186
GPIO9
MCLK
206
18
PERROR
PPD0
3
4
PPD1
PPD2
5
6
PPD3
7
PPD4
PPD5
8
9
PPD6
PPD7
10
151
RXD
SELECT
17
153
SIO_RXD
GND7
52
53
GND8
GND9
70
175
GPIO0
GPIO1
176
187
GPIO10
GPIO11
188
189
GPIO12
GPIO13
190
GPIO14
191
192
GPIO15
GPIO2
177
178
GPIO3
GPIO4
179
180
GPIO5
181
GPIO6
GND14
119
120
GND15
GND16
134
154
GND17
GND18
155
157
GND19
2
GND2
GND20
159
174
GND21
GND22
193
205
GND23
GND24
207
GND3
26
27
GND4
GND5
38
39
GND6
DA4
132
133
DA5
135
DA6
DA7
136
137
DA8
DA9
138
DSR
148
149
DTR
24
EXMACK
EXMREQ
23
EXTNWAIT
25
GND1
1
71
GND10
GND1188GND12
104
105
GND13
78
D3
D30
111
D31
112
D4
79
81
D5
D6
82
83
D7
D8
84
85
D9
128
DA0
DA1
129
DA10
139
140
DA11
DA12
141
DA2
130
131
DA3
92
D15
D16
93
94
D17
D18
96
97
D19
D2
77
D20
98
99
D21
D22
100
D23
101
102
D24
D25
106
107
D26
108
D27
D28
109
110
D29
A8
49
50
A9
16
BSY
201
CLKSEL
158
COMCLK
CnEBSY
162
163
CnEMSG
CnPESY
160
161
CnPMSG
D0
75
76
D1
D10
86
87
D11
D12
89
90
D13
D14
91
A14
57
58
A15
A16
59
60
A17
A18
63
64
A19
A2
42
A20
65
66
A21
A22
67
68
A23
43
A3
A4
44
45
A5
A6
47
48
A7
KS32C6100
U1
A0
40
41
A1
A10
51
54
A11
A12
55
56
A13
18PF
C78
C21
0.1UF
R272
10K
C68
18PF
C11
0.1UF
C69
18PF
220PF
C301
18PF
C80
18PF
C67
C79
18PF
C25
0.1UF
78
RA33
RA4
12
34
56
78
RA2
RA33
12
34
56
C76
18PF
VCC
RA3
RA33
12
34
56
78
VCC_U1
A(0:23)
TXD
RXD
nECS0
nECS1
CBSY*
A(1)
A(0)
VIDEO*
VBUS
EIRQ0*
A(17)
A(16)
A(15)
A(14)
A(13)
A(12)
A(11)
A(10)
A(9)
A(8)
A(7)
A(6)
A(5)
A(4)
A(3)
A(2)
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)
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)
LED(4)
LED(1)
LED(2)
LED(3)
E2PROM_DO
DPO_RST*
E2PROM_DI
MC_PERROR
PPD(0)
PPD(1)
PPD(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(8)
DA(9)
DA(10)
SYSCLK
VCLK
MC_BUSY
DA(0)
DA(1)
DA(10)
DA(2)
EMSG*
PSYNRQ*
READY*
PRINT*
nRCS(0:2)
nCAS(0:3)
PPD(0:7)
D(0:31)
DA(0)
DA(1)
DA(2)
DA(3)
DA(4)
DA(5)
DA(6)
DA(7)
D(26)
D(27)
D(28)
D(29)
D(30)
D(31)
TDO
CCLK*
CMSG*
EBSY*
D(15)
D(16)
D(17)
D(18)
D(19)
D(20)
D(21)
D(22)
D(23)
D(24)
D(25)
D(4)
D(5)
D(6)
D(7)
D(8)
D(9)
D(10)
D(11)
D(12)
D(13)
D(14)
A(23)
A(3)
A(4)
A(5)
A(6)
A(7)
A(8)
A(9)
TnRST
D(0)
D(1)
D(2)
D(3)
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)
8. Schematic Diagrams
Schematic Diagrams
8-2 Samsung Electronics
Engine Controller (2/6)
1
2
1
2
3
SLCON3P-TONER
CN103
1
2
3
+5V
CN10
SLCON2P-FAN
1NF
C31
50V
JS5
CN7
SLCON3P-CLN
24
3
4
5
6
7
8
9
+24V
0.5
R62
1/2
1
10
11
12
13
14
15
16
17
18
19
2
20
21
22
23
1NF
C41
50V
+5V
D225
1N4148
CN5
DLCON_24P-VIDEO
74LS06
U205-3
56
100R293 1/4
+5VT
50V
C42
1NF
Q10
KSC1008
B
C
E
+5VS+24VS1
10NF
C36
50V
1/8
R59
5.6K
JS6
+5V+5V
+5V
5.6K
R26
1/8
D232
1N4148
5.6K
R51
1/8
1N4148
D227
1/8
R48
2.2K
50V
C231
10NF
50V
C24
10NF
D231
1N4148
D226
1N4148
+24VS1
50V
C17
1NF
5.6K
R61
1/8
+5V
+5V
5.6K
R60
1/8
+5V
1/8R283 100
1N4148
D230
100R284 1/8
BD1
1N4148
D224
1/8R285 100
D228
1N4148
U203-3
7407
56
33
R517
1/2
BDCORE
2
3
4
10V
47UF
C11
+5V
+5VT
+5V
1K
R42
1/8
50V
C30
100PF
SLCON4P-DCU
CN2
1
C22
1NF
50V
C503
100UF
1/8R29 100
1/2
R8
1
1/8
R63
12K
50V
100NF
C46
50V
50V
C26
100NF
100NF
C32
50V
8
9
1N4148
D233
+5V
1N4148
D229
R282 1/8
CN3
SLCON11P
1
10
11
2
3
4
5
6
7
CN6
SLCON8P-SCF
1
2
3
4
5
6
7
8
+5V
100
100PF
C16
50V
JS4
CLN
TONER
VDI
LDON
HSYNC
LREADY
1/8
R28
5.6K
+5V
EBUSY
READY
HSYNC
CMSG
EMSG
CCLK
PRINT
PSYNC
DCU_DATA
DCU_CLK
PMOTOR
PT_LAMP
SEL_CASSET
SCF_MOTOR
SCF_CLUTCH
SCF_EMPTY
VDO
Samsung Electronics 8-3
Schematic Diagrams
Engine Controller (3/6)
+5V
NOT USED
50V
C227
100NF
KSD526
Q201
B
C
E
50V
C209
100NF
1/8
R224
47K
100NF
C226
50V
+18V
1/8
R234
86.6K
50V
C229
100NF 2.2NF
C223
500V
+24VS1
470PF
C204
3KV
50V
C217
10NF
HS201
HEAT_SINK2
50V
C228
100UF
1/4
BR
R201
10M
+24VS1
C220
2KV
1/8
R415
3.3K
50V
C222
100NF
2KV
1/8
R238
100K
ZD203
1N5274B
100PF
3.3M
R212
1/2
SUPPLY
HP11
30M
R412
BR
100PF
C403
DEV
1
U201-1
LM324
Q0
1
Q13
2
Q2
1/8
R257
33K5.6K
R261
1/8
VR203
10KOHM
HP2
C
E
50V
C210
33NF
+24VS1
470PF
C201
3KV
D210
ESJA57-04
U203-4
7407
98
2SA1413
Q402
B
C
E
KSC1008
Q403
B
1/8
R237
16.2K
2KV
C404
68PF
75K
R269
1/8
TRANS10P
T204
110
2
4
56
1/8
R413
33K
3.3M
R229
1/2
1/2
R210
3.3M
UZ33B
ZD205
MHV
HP31
1/8
R218
390
1/2
R226
3.3M
15K
R222
1/8
1N4148
D215
+18V
47K
R223
1/8
12
1/8
R258
180K
4.7M
R204
1/4
10
R217
1/2
TRANS10P
T202
1
10
2
4
5
6
7407
U203-6
13
+18V
9.1K
R262
1/8
U202
KA7818
2
GND
IN
13
OUT
3.3M
R239
1/2
2.2K
R416
1/8
10K
R418
1/8
UZ33B
ZD204
1/8
R253
27K
10K
R417
1/8
+24VS1
+18V
33NF
C208
50V
Q204
KSD526
B
C
E
50V
C230
2.2NF
10M
R205
1/4
SLCON2P-MHV
CN8
1
2
1/2
R230
10
R268
17.4K
47K
R227
1/8
10KOHM
VR204
U203-1
7407
12
2M
R208
1/4
1/8
Q211
KSC1008
B
C
E
1/8
R419
33K
+24VS1
1K
R414
1/8
LM324
U201-3
8
Q0
10 Q1
Q2
9
1/4
R207
4.7M
3KV
C219
470PF
ESJA57-04
D201
D202
ESJA57-04
1/4
R209
2M
93.1K
R233
1/8
D223
1N4148
BIASPWM
MHV
SUPPLY
1/8
R266
33K
390
R231
1/8
Schematic Diagrams
8-4 Samsung Electronics
Engine Controller (4/6)
MLC AXIAL
+5V
MLC AXIAL
MLC AXIAL
500V
C10
10NF
50V
C43
1NF
50V
C37
100NF
1/8
R37
4.3K
+5V
D4
1N4148
1/8R30 100
50V
C1
10NF
1/8
R57
3.3K
CN4
1
2
+5V
150
R512
1/8
150
R23
1/8
510R20 1/8
OP3
S58VT
SLCON2P-THER
D222
1N4148
1/8
R41
1K
10NF
C502
500V
+5V
KSB1151-Y
Q9
B
C
E
15K
R43
1/8
1/8
R49
1K
1NF
C237
50V
+24VS2
1/8
R39
1.2K
1K
R18
1/8
U5-1
LM393
Q0
1Q1
3
2Q2
Q8
KSC1008
B
C
E
1NF
C45
50V
+5V
100UF
C504
50V
1/8
R35
5.6K
1N4148
D220
+5V
1K
R58
1/8
BDCORE
FB2
+5V
5.6K
R40
1/8
100R24 1/8
FEED_CLUCH
1
2
FB3
BDCORE
+24V
1N4148
D221
100R514 1/8
+5V
4.7K
R47
1/8
5.6K
R19
1/8
OP1
S58VT
50V
47UF
C506
1/8R15 100
+5V
1/2
R292
2.2K
1/8
R513
15K
S58VT
OP4
10NF
C12
500V
1/8
R44
1K
Q4
KSC1008
B
C
E
1/8
R64
150
1/8
R16
150
1
10
2
3
4
5
6
7
8
9
S58VT
OP2
+24VS1
5.6K
R38
1/8
Q208
KSC1008
B
C
E
DLCON_10P
CN104
C
E
74LS06
U205-4
98
1/8
R22
15K
R17
1/8
+24VS2 +24VS1
+5V
KSC1008
Q3B
MOTOR_PA
MOTOR_PB
MOTOR_EA
FAN_E
MP_PAPER
MP_CLUTCH
D1
1N4003
15K
COVER
FUSER
FUSERON
CLUTCH
FEED
PEMPTY
EXIT
SLEEP
THERM
PSIZE
Samsung Electronics 8-5
Schematic Diagrams
Engine Controller (5/6)
ESJA58-06
D206
Q202
KSD526
B
C
E
1.8K
R274
1/8
2.2K
R250
1/8
U201-2
LM324
Q0
7Q1
5
6Q2
309K
R511
1/8
LM324
U201-4
14
Q0
12
Q1
Q2
13
+18V
+18V
1/8
R505
56K
68K
R515
1/8
6K
1N4148
D502
+18V
+18V
VR201
10KOHM
+18V
1/8
R501
2.2K
JP641
470PF
C211
7407
U203-5
11 10
4.7M
R277
1/4
68PF
C203
2K
D501
+24VS1
6K
C213
100PF
1/8
R252
100
1/2
R216
56
75K
R506
1/8
1N4148
ESJA58-06
D205
1/8
R256
2.2K
6K
C215
470PF
1N4003
D216
1K
R213
1/8
1/8
R504
2.2K
50V
C505
4.7nF
D217
1N4003
+18V
30M
R280
BR
Q502
KSA708
B
C
E
470K
R243
1/8
12.1K
R245
1/8
Q203
B
C
E
Q207
KSA708
B
C
E
ESJA58-06
D207
1/8
R247
78.7K
1N4148
D209
HS202
HEAT_SINK2
KSD526
BR
R220
200M
2.2nF
C221
50V
33NF
C207
50V
R215
100K
1/8
R221
390
470PF
C216
6K
56
R219
1/2
VR205
100KOHM
1/8
10KOHM
VR202
6K
C212
470PF
33K
R500
1/8
R263
33K
1/8
R507
33K
KSC1008
Q503
B
C
E
D503
1N4003
10nF
C501
50V
1/8
ZD201
UZ5.6BCB UZ7.5BM
ZD202
50V
C225
2.2nF
1/8
R509
619K,MF
33NF
C224
50V
T201
TRANS10P
1
10
2
4
5
6
1/8
R225
2.2K
1/8
R240
68K
33K
R249
1/8
1/8
R251
1.2K
THV
HP41
680K
R236
1/8
KSA708
Q209
B
C
E
T203
TRANS10P
110
2
4
56
D203
ESJA57-04
6K
C206
470PF
50V
C214
33NF
1/8
R260
5.6K
+5V
1/8
R508
21.5K,MF
34
1M
R502
1/8
D500
1N4148
D208
ESJA58-06
C
E
1/8
R503
33K
6K
C202
470PF
U203-2
7407
ESJA57-04
D204
+5V
50V
C500
2.2nF
Q500
KSC1008
B
KSA708
Q501
B
C
E
1/8
R248
56K
THVPWM
THVEA
THVREAD
30M
R211
BR
17.4K,MF
R510
1/8
Loading...