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LASER PRINTER
ML-6050
QwikLaser 6050
SERVICE MANUAL
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
8. Schematic Diagrams
8-1. Engine Controller (1/6)
VCC
A(0:23)
VCC_U1
C51 18PF A(0)
103
113
142
143
167
168
183
184
199
200
C52 18PF A(1)
20
21
22
46
61
62
80
95
R46 nECS0
C53 18PF A(2)
10K nECS1
VDD1
VDD2
VDD3
VDD4
VDD5
VDD6
VDD7
VDD8
VDD9
VDD10
VDD11
VDD12
VDD13
VDD14
VDD15
VDD16
VDD17
VDD18
C54 18PF A(3)
C55 18PF A(4) A(0) 2 1 40 29
A0 nECS0
C56 18PF A(5) A(1) RA13 4 3 41 30
A1 nECS1
VCC LF4 VCC_U1 C57 18PF A(6) A(2) RA33 6 5 42 31
A2 nECS2 nRCS(0:2)
FILTER_22NF C58 18PF A(7) A(3) 8 7 43 32
A3 nECS3
1 3 C59 18PF A(8) A(4) 2 1 44 69 nRCS(0)
2 C191 C160 C9 C10 C11 C12 C13 C14 C15 A4 nRCS0
C60 18PF A(9) A(5) RA14 4 3 45 72
A5 nRCS1
C61 18PF A(10) A(6) RA33 6 5 47 73 nRCS(2)
33UF/16V 0.1UF 0.1UF 0.1UF 0.1UF 0.1UF 0.1UF 0.1UF 0.1UF A6 nRCS2 nRAS(0:5)
C62 18PF A(11) A(7) 8 7 48 74
A7 nRCS3
C63 18PF A(12) A(8) 2 1 49 122 nRAS(0)
A8 nRAS0
C64 18PF A(13) A(9) RA10 4 3 50 123
A9 nRAS1 nCAS(0:3)
C65 18PF A(14) A(10)RA33 6 5 51 124 nRAS(2)
C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C47 A10 nRAS2
C66 18PF A(15) A(11) 8 7 54 125 nRAS(3)
A11 nRAS3
0.1UF 0.1UF 0.1UF 0.1UF 0.1UF 0.1UF 0.1UF 0.1UF 0.1UF 0.1UF 0.1UF C67 18PF A(16) A(12) 2 1 55 126
A12 nRAS4
C68 18PF A(17) A(13)RA11 4 3 56 127
A13 nRAS5
C69 18PF A(18) A(14)RA33 6 5 57 116 nCAS(3)
A14 nCAS3
C70 18PF A(19) A(15) 8 7 58 117 nCAS(2)
A15 nCAS2
C71 18PF A(20) A(16) 2 1 59 118 nCAS(1)
A16 nCAS1
C72 18PF A(21) A(17) RA9 4 3 60 121 nCAS(0)
A17 nCAS0
C73 18PF A(22) A(18)RA33 6 5 63 33
A18 nWE0 WE(0)
C74 18PF A(23) A(19) 8 7 64 34
A19 nWE1
A(20) 2 1 65 35
A20 nWE2
A(21)RA12 4 3 66 36
A21 nWE3
A(22)RA33 6 5 67 114
A22 nDWE nDWE
A(23) 8 7 68 115
D(0:31) A23 nDOE
UCLK 156
D(0) 2 1 75 151 R153 33
D0 RXD RXD
VCC VCC D(1) 4 3 76 150 R154 33
D1 TXD TXD
VCC D(2) RA1 6 5 77 149
D2 DTR
D(3) RA33 8 7 78 148
C7 D3 DSR
D(4) 2 1 79 153
R44 D4 SIO_RXD OE*
0.1UF R130 D(5) 4 3 81 152
10K D5 SIO_TXD
R43 D(6) RA2 6 5 82 37
1K D6 nOE DA(0:12)
D(7) RA33 8 7 83 198
10K D7 nBK0HW
U30 D(8) 2 1 84 128 DA(0) DA(0) C75 18PF
D8 DA0
2 8 D(9) 4 3 85 129 DA(1) DA(1) C76 18PF
_RIN VCC D9 DA1 R290
1 7 U35-1 U35-2 D(10) RA3 6 5 86 130 DA(2) DA(2) C77 18PF
REF SEN D10 DA2 0
3 5 1 2 3 4 D(11) RA33 8 7 87 131 DA(3) DA(3) C78 18PF
CT _RES D11 DA3
4 6 D(12) 2 1 89 132 DA(4) DA(4) C79 18PF
GND RES D12 DA4
74F14 74F14 D(13) 4 3 90 133 DA(5) DA(5) C80 18PF
R42 D13 DA5
7705A D(14) RA4 6 5 91 U1 135 DA(6) DA(6) C81 18PF
470 D14 DA6
D(15) RA33 8 7 92 136 DA(7) DA(7) C82 18PF
D15 DA7
D(16) 2 1 93 137 DA(8) DA(8) C83 18PF
D16 DA8
D(17) 4 3 94 KS32C6100 138 DA(9) DA(9) C84 18PF
D17 DA9
C1 C161 D(18) RA5 6 5 96 139 DA(10) DA(10)C85 18PF
C6 R45 D18 DA10
0.1UF 33UF/16V D(19) RA33 8 7 97 140
10K 10NF D19 DA11
D(20) 2 1 98 141
D20 DA12
D(21) 4 3 99 11
D21 nSELECT_IN PP_SELIN*
D(22) RA6 6 5 100 12
D22 nSTROBE PP_STROBE*
D(23) RA33 8 7 101 13
D23 nAUTOFD PP_AUTOFD*
D(24) 2 1 102 14
WTROUT D24 nINITIAL PP_INIT*
2 1 D(25) 4 3 106 15
D25 nACK MC_ACK*
VCC D(26) RA7 6 5 107 16
D26 BSY MC_BUSY
U36-1 D(27) RA33 8 7 108 17
D27 SELECT MC_SELECT
74F08 D(28) 2 1 109 18
C192 D28 PERROR MC_PERROR
D(29) 4 3 110 19
D29 nFAULT MC_FAULT*
0.1UF 3 D(30) RA8 6 5 111 D30
D(31) RA33 8 7 112 D31 PPD(0:7)
3 PPD(0)
PPD0
RESET* 195 nRESET PPD1 4 PPD(1)
TnRST 196 TnRST PPD2 5 PPD(2)
VCC
202 TDI PPD3 6 PPD(3)
204 7 PPD(4)
TMS PPD4
208 TCK PPD5 8 PPD(5)
TDO 203 TDO PPD6 9 PPD(6)
197 TMODE PPD7 10 PPD(7)
201 175
CLKSEL GPIO0 VBUS
176
GPIO1 PANEL_KEY
SYSCLK 206 MCLK GPIO2 177 LED(4)
GPIO3 178
LED(1)
VCC 179
GPIO4 LED(2)
180
GPIO5 LED(3)
GPIO6 181 EIRQ0*
GPIO7 182
R272 E2PROM_DO
GPIO8 185
10K DPO_RST*
186
GPIO9 E2PROM_DI
CCLK* 158 COMCLK GPIO10 187 WR_FLASH
CBSY* 160 CnPESY GPIO11 188 DEMO*
CMSG* 161 CnPMSG GPIO12 189
SEL_DEMO
162 190
EBSY* CnEBSY GPIO13 EXITP*
EMSG* 163 CnEMSG GPIO14 191 E2PROM_CS
PSYNRQ* 166 nENGPRQ GPIO15 192 E2PROM_SK
R159 0 169 23
LSYNC* nENGHSYNC EXMREQ
170 24
nCPUPSYNC EXMACK
171 25
READY* nENGREADY EXTNWAIT R142
PRINT* 172 nCPUPRINT nSC5 28 C301
173 144 33
VIDEO* VIDEO_OUT nSRD0 220PF
nSWR0 145
164 146
VCLK VCLK0 nSRD1
nSWR1 147
VCLK1 165
194
GND10
GND11
GND12
GND13
GND14
GND15
GND16
GND17
GND18
GND19
GND20
GND21
GND22
GND23
GND24
U36-2 U36-3 U36-4 WTROUT WTROUT
GND1
GND2
GND3
GND4
GND5
GND6
GND7
GND8
GND9
4 9 13 U35-6
6 8 11 13 12
5 10 12
1
2
26
27
38
39
52
53
70
71
88
104
105
119
120
134
154
155
157
159
174
193
205
207
74F14
74F08 74F08 74F08
Samsung Electronics 8-1
Schematic Diagrams
Engine Controller (2/6)
+5V +5V +5V +24V +5V
CN2 R61 R60 R59
1 D228 D229 D230 D231 5.6K 5.6K 5.6K CN6