Service Call 490-491
SM
6-19
D255/D256/M281/M282
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6.5 SERVICE CALL 490-491
6.5.1 SC400 (ENGINE: IMAGING 3: AROUND THE DRUM)
SC No.
Type
Error Name/Error Condition/Major Cause/Solution
SC490-00
D
Toner Density Sensor Error
The sensor output value is 930 or more continuously for 5
seconds.
Toner density sensor defective
Toner motor defective
Connect-Left PCB defective
IOB defective
Toner density sensor defective
1. Reconnect the following connectors.
Toner Density Sensor – Drum PCB connector
Drum PCB – Drum Connection PCB connector
Drum Connection PCB – Connect-Left PCB
connector
Connect-Left PCB – IOB connector
2. If the connector is broken, shorted, or grounded,
replace the connector.
3. Check that the gears and rollers of the development
unit are not damaged and rotate smoothly.
4. Replace the development unit.
Summary of Contents for M281 Series
Page 1: ...D255 D256 M281 M282 SERVICE MANUAL ...
Page 16: ......
Page 20: ......
Page 21: ...PRODUCT INFORMATION REVISION HISTORY Page Date Added Updated New None ...
Page 22: ......
Page 28: ......
Page 189: ...PREVENTIVE MAINTENANCE REVISION HISTORY Page Date Added Updated New None ...
Page 190: ......
Page 194: ......
Page 278: ...Laser Unit MP 501 601 D255 D256 M281 M282 4 84 SM 6 Remove the laser unit A ...
Page 370: ......
Page 436: ......
Page 438: ......
Page 442: ...Self Diagnostic Mode D255 D256 M281 M282 6 4 SM ...
Page 563: ...DETAILED DESCRIPTIONS REVISION HISTORY Page Date Added Updated New None ...
Page 564: ......
Page 585: ...Fusing Unit SM 7 21 D255 D256 M281 M282 Detailed Descriptions ...
Page 587: ...Paper Exit Unit SM 7 23 D255 D256 M281 M282 Detailed Descriptions ...
Page 590: ...Paper Feed Unit D255 D256 M281 M282 7 26 SM ...
Page 593: ...ARDF MP 501 601 Only SM 7 29 D255 D256 M281 M282 Detailed Descriptions ...
Page 595: ...ARDF MP 501 601 Only SM 7 31 D255 D256 M281 M282 Detailed Descriptions ...
Page 599: ...D255 D256 M281 M282 SERVICE MANUAL APPENDICES ...
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Page 605: ...APPENDIX SPECIFICATIONS REVISION HISTORY Page Date Added Updated New None ...
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Page 633: ...PREVENTIVE MAINTENANCE TABLES REVISION HISTORY Page Date Added Updated New None ...
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Page 807: ...SOFTWARE CONFIGURATION REVISION HISTORY Page Date Added Updated New None ...
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