Bizhub Pro C6501 C6501p C65hc C5501 Service Manual
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DESCRIPTION:
Bizhub Pro C6501 C6501p C65hc C5501 Service Manual
After publication of this service manual, the parts and mechanism may be subject to change for improvement of their performance. Therefore, the descriptions given in this service manual may not coincide with the actual machine. When any change has been made to the descriptions in the service manual, a revised version will be issued with a revision mark added as required.
Operation
Image creation control
• The image creation process starts when the drum motor /K (M17) turns on [1], though transferring each color toner image to the transfer belt is made in the order of yellow, magenta, cyan, and black.
• After M17 turns on, the other drum motors are turned on in the order of motor /Y (M14) [2], /M (M15) [3] and /C (M16) [4].
• The erase lamp, charging corona and developing bias of each color turns on when the corresponding drum motor starts to rotate.
• The developing motor starts to rotate [5] after the specified time passed from the start of the writing operation [6].
• The on [6] and off [8] of writing operation corresponds to the on and off of the developing bias (AC) and the first transfer.
• The developing motor and the toner supply motor stop and the writing operation is finished [11].
• The charging corona is deenergized and the first transfer is finished. [12].
• When the turning corona turns off [15], the DC bias supply, the erase lamp and the drum motor are stopped. This is the end of Y toner image creating process.
• Creating toner images of the other colors is performed subsequently.
• The first transfer pressure/release motor (M119) and the second transfer pressure/release motor (M34) turn on while creating the toner images on each drum.
• When the transfer belt is moved to the first transfer position by the M19, the V_TOP signal which triggers the second transfer is output [7].
• The toner images on each drum are transferred to the transfer belt one by one (first transfer).
• The separation (HV/2) turns on [9] after the specified time passed from when the V_TOP signal is output.
• After the specified time passed from when the separation (HV/2) turns on, the second transfer (HV/2) turns on [10] to transfer the complete toner image on the belt to paper (second transfer). The bias supply is stopped [10] and second transfer cleaning is canceled.
TABLE OF CONTENTS:
Bizhub Pro C6501 C6501p C65hc C5501 Service Manual
OUTLINE
1 SYSTEM CONFIGURATION 1
2 PRODUCT SPECIFICATIONS 6
3 UNIT CONFIGURATION12
4 PAPER PATH 13
CONFIGURATION/OPERATION
5 CONTROL BLOCK DIAGRAM 15
6 IMAGE CREATING PROCESS 16
61 Flow and functions16
62 Charging process (Step 1)17
63 Laser exposure process (Step 2) 17
64 Image development process (Step 3) 18
65 First transfer process (Step 4) 19
66 Second transfer process (Step 5) 20
67 Separation process (Step 6) 21
68 Drum cleaning (Sub step 1)22
69 Exposure before charging (Sub step 2)22
610 Transfer belt cleaning (Sub step 3)23
611 Second transfer roller/Lw cleaning (Sub step 4) 24
612 Toner collection (Sub step 5) 25
613 Process speed26
7 SCANNER SECTION 27
71 Configuration 27
72 Drive 27
73 Operation 28
731 Scanner/Exposure lamp control 28
732 Original size detection control 33
733 Original reading area34
734 AE/ACS control 34
735 Image processing 34
8 WRITE SECTION 35
81 Configuration 35
82 Operation 36
821 Laser beam path36
822 Write unit control37
823 Color registration control38
824 Front/back sides skew correction in main scan direction43
825 Back side magnification adjustment in sub scan direction 43
826 Image stabilization control 44
9 PHOTOCONDUCTOR SECTION 45
91 Configuration 45
92 Drive 46
93 Operation 47
bizhub PRO C6501
/C6501P/C65hc/C5501
CONTENTS
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Theory of Operation Ver30 Jul 2009
CONFIGURATION/OPERATION
931 Image creation control 47
932 Erase lamp (EL) control 49
933 Image stabilization control 49
10CHARGING SECTION 50
101 Configuration 50
102 Operation 51
1021 Charging control51
11INTERMIDIATE TRANSFER SECTION 52
111 Configuration 52
112 Drive 53
1121 Transfer belt conveyance/pressure drive53
1122 Second transfer pressure/release drive 54
113 Operation 55
1131 First transfer roller pressure/release mechanism 55
1132 First transfer control 56
1133 Second transfer mechanism57
1134 Second transfer control 57
1135 Image correction unit shutter mechanism58
1136 Control of flip prevention for the belt cleaning blade 58
1137 Control against belt filming 58
1138 Image stabilization control 58
12DEVELOPING SECTION59
121 Configuration 59
122 Drive 60
123 Operation 61
1231 Developer conveyance 61
1232 Developing bias control 61
1233 Developing suction control 62
1234 Image stabilization control 62
13TONER SUPPLY SECTION63
131 Configuration 63
132 Drive 64
133 Operation 65
1331 Toner conveyance control 65
1332 Remaining toner detection control 65
1333 Stop control for print operation with no toner65
14TONER COLLECTION SECTION 66
141 Configuration 66
142 Drive 67
143 Operation 68
1431 Toner collection control 68
1432 Toner collection box control 68
1433 Box full control 68
15PAPER FEED SECTION69
151 Configuration 69
152 Drive 70
153 Operation 71
1531 Plate up/down control 71
1532 Paper size detection control 72
1533 Paper feed control 73
bizhub PRO C6501
/C6501P/C65hc/C5501
CONTENTS
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Theory of Operation Ver30 Jul 2009
CONFIGURATION/OPERATION
1534 Remaining paper detection control 77
16BYPASS FEED TRAY SECTION78
161 Configuration 78
162 Drive 79
163 Operation 80
1631 Plate up/down control 80
1632 Paper size detection control 80
1633 Paper feed control 81
1634 Paper empty detection control 82
1635 Remaining paper detection control 82
17VERTICAL CONVEYANCE SECTION 83
171 Configuration 83
172 Drive 84
173 Operation 85
1731 Vertical conveyance control 85
18REGISTRATION SECTION 86
181 Configuration 86
182 Drive 87
183 Operation 88
1831 Loop control88
1832 Registration operation 89
1833 Paper leading edge timing correction control89
1834 Registration speed correction control89
19ADU SECTION 90
191 Configuration 90
192 Drive 91
193 Operation 92
1931 Paper reverse control92
1932 ADU conveyance control95
1933 Back side centering correction control 95
20REVERSE/PAPER EXIT SECTION 96
201 Configuration 96
202 Drive 97
2021 Reverse/paper exit drive97
2022 Paper exit drive/OT-502 drive 98
203 Operation 99
2031 Conveyance control 99
2032 Reverse/paper exit timing control 102
2033 Paper exit decurler roller pressure control 103
2034 Reverse decurler roller rotation control 104
2035 Paper exit full detection control104
21FUSING SECTION105
211 Configuration105
212 Drive 106
213 Operation107
2131 Fusing roller drive control 107
2132 Pressure/release control 109
2133 Fusing temperature control110
2134 Protection against abnormality 111
2135 Fusing roller/Lw cooling control112
bizhub PRO C6501
/C6501P/C65hc/C5501
CONTENTS
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Theory of Operation Ver30 Jul 2009
CONFIGURATION/OPERATION
22 INTERFACE SECTION 113
221 Configuration113
222 Application 113
23IMAGE STABILIZATION CONTROL 114
231 Outline 114
232 Operation flow 114
2321 Image stabilizing controls when the sub power switch (SW2) is ON,
during printing, and during idling 114
2322 Image stabilizing controls when selecting the “Stability“ in expert settings 119
2323 Other Image stabilizing controls120
24IMAGE PROCESSING121
241 Operation flow 121
242 Image type classification 122
25OTHER CONTROLS 124
251 Power On control124
2511 Parts that operate when the main power switch (SW1) is turned on124
2512 Parts that operate when the sub power switch (SW2) is turned on 125
252 Fan control 126
2521 Configuration 126
2522 Operation 127
253 Counter control 132
2531 Structure of counter132
2532 Counter operation 133
254 Dehumidifier heater control 134
255 ACS control 135
2551 Switching from the color mode to the black-and-white mode 135
2552 Count when using ACS135
MAINTENANCE
26MAINTENANCE PROCEDURE137
261 Housing section 137
2611 Replacing the Dust-proof filter /1 assy 137
2612 Replacing dust-proof filter /2 assy 138
262 Photoconductor section 139
2621 Process unit disassembly flowchart139
2622 Opening/closing toner supply section 140
2623 Pulling out the process unit142
2624 Removing drum cartridge 143
263 Charging section 145
2631 Replacing the charging corona 145
2632 Replacing the charging dust-proof filter146
264 Intermediate transfer section 147
2641 Removing/installing the transfer belt unit 147
2642 Replacing the belt cleaning blade 150
2643 Replacing 1st transfer roller /Y, /M, /C, /K and Transfer roller bearing 151
2644 Replacing the transfer belt 153
2645 Replacing the 2nd transfer roller /Up 155
2646 Replacing the separation claw assy156
2647 Replacing the belt cleaner unit 157
2648 Replacing the toner collection sheet /1 158
bizhub PRO C6501
/C6501P/C65hc/C5501
CONTENTS
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Theory of Operation Ver30 Jul 2009
CONFIGURATION/OPERATION
2649 Replacing the 2nd transfer roller /Lw and the transfer earth plate assy 159
26410 Replacing the belt separation claw solenoid (SD1) 160
26411 Replacing the separation discharging assy161
265 Developing section 162
2651 Replacing the developer /Y, /M, /C, /K162
2652 Replacing the developing unit /C, /M, /Y, /K 164
266 Toner collection box assy166
2661 Replacing the toner collection box assy166
267 Paper feeding section167
2671 Replacing the pick-up roller/paper feed roller rubber 167
2672 Replacing the separation roller rubber 170
2673 Replacing the paper feed clutch/pre-registration clutch171
268 Bypass feed tray section 172
2681 Replacing the pick-up roller/paper feed roller rubber 172
2682 Replacing the separation roller rubber 174
2683 Replacing the paper feed clutch/BP (MC6)175
269 Vertical conveyance section 177
2691 Replacing the intermediate conveyance clutch /1 (MC13) 177
2610 Registration section 179
26101 Replacing the cleaning stay assy 179
26102 Replacing the registration roller assy 180
2611 ADU section184
26111 Replacing the intermediate conveyance clutch/2 (MC4) and /3 (MC5) 184
26112 Replacing the ADU conveyance clutch/1 (MC1), /2 (MC2), /3 (MC3),
and the ADU pre-registration clutch (MC18)186
2612 Reverse/paper exit section 188
26121 Replacing Reverse decurler roller 188
26122 Replacing the paper exit decurler roller190
2613 Fusing section 194
26131 Removing/installing the fusing unit 194
26132 Replacing the fusing drive gear /B and the fusing duct 2 assy 196
26133 Replacing the fusing drive gear /M 199
26134 Replacing the fusing lamp /Up 200
26135 Replacing the fusing roller /2, fusing bearing, and fusing drive gear /O 202
26136 Replacing the fusing belt, fusing roller /1, insulating sleeve /Up,
fusing bearing /Up, and belt regulation sleeve 205
26137 Replacing the fusing heater lamp /4 (L5) 207
26138 Replacing the fusing roller /Lw, fusing bearing /Lw, and insulating sleeve /Lw 209
26139 Replacing the sensor mounting plate A assy 212
261310Replacing the sensor stay B assy 213
261311Replacing the fusing paper exit roller /Up 215
261312Replacing the fusing regulation gear /A and the fusing limiter 217
2614 OT-502 219
26141 Replacing the paper retainer roller 219
26142 Replacing the paper exit roller 220
26143 Replacing the paper exit driven roller/2222
27OTHER PROCEDURES 224
271 Items not allowed to be disassembled and adjusted 224
2711 Scanner section224
2712 Write section 226
2713 Photoconductor section 228
bizhub PRO C6501
/C6501P/C65hc/C5501
CONTENTS
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Theory of Operation Ver30 Jul 2009
CONFIGURATION/OPERATION
2714 Charging section 229
2715 Intermediate transfer section 230
2716 Fusing unit section 231
272 Disassembly/reassembly parts list232
273 Disassembly/reassembly procedure 233
2731 Removing/reinstalling rear cover233
2732 Removing/reinstalling left cover233
2733 Removing/installing right cover/Up1, /Up2, /Up3, /Lw1 and /Lw2 234
2734 Removing/reinstalling original glass assy 235
2735 Removing/reinstalling upper cover/Fr, /Rt, and Lt 236
2736 Removing/reinstalling upper cover /Rr1 and /Rr2 237
2737 Removing/installing main board unit238
2738 Removing/installing CCD unit 239
2739 Removing/installing exposure unit 241
27310 Removing/installing exposure lamp244
27311 Removing scanner wire245
27312 Reinstalling the scanner wire 247
27313 Removing/installing write unit 250
27314 Removing/installing process unit 252
27315 Removing/reinstalling image correction unit253
27316 Removing/installing belt collectin pipe, vertical conveyance pipe
and horizontal conveyance pipe254
27317 Removing/reinstalling ADU 267
27318 Replaceing the lock lever/1, /2 269
27319 Removing/reinstalling paper feed tray /1, /2 and /3271
27320 Removing/reinstalling tray up/down wire 272
27321 Removing/installing temperature sensor /1 (TEMS/1), thermostat /1 (TS1) and /2 (TS2)275
27322 Removing/installing temperature sensor /2 (TEMS/2) and thermostat /3 (TS3) 278
27323 Removing/reinstalling OT 280
274 Commercially available parts 281
2741 Installing the status indicator light 281
2742 Installing the key counter (KCT)285
PLEASE NOTE:
- This is the SAME manual used by the dealers to troubleshoot any faults in your vehicle. This can be yours in 2 minutes after the payment is made.
- Contact us at [email protected] should you have any queries before your purchase or that you need any other service / repair / parts operators manual.
