232
SuperScript 4400 — Maintenance Guide
19. Mottle -
Variation of the optical density is found in the image.
Main Causes
1.
Transfer unit is not locked into place.
2.
Improper assembly of the transfer roller.
3.
THV output of DC high voltage unit is not normal.
4.
Failure of the toner module.
5.
Deformation of the paper.
Countermeasures
1.
Confirm that the transfer unit is firmly locked into place.
1.
Ensure that the transfer roller is properly installed.
1.
Replace the DC high voltage unit with a new unit. (See Chapter 7)
1.
Replace the toner module with a new module.
2.
Replace the Photoconductor belt module. (See Chapter 6)
Fusing Unit
Transfer Unit
Paper Discharger
Unit
Transfer Roller
Transfer Drum
Paper Feeding
Roller
Drum Cleaner
Содержание Super Script 4400
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Страница 145: ...136 SuperScript 4400 Maintenance Guide IOD2 P W B Registration Clutch Side Cover R Cleaner Clutch Fuser Clutch C ring ...
Страница 174: ...Replacement Procedures for Maintenance Parts 165 PRINTER MAINTENANCE Controller Fan Fan Case Interlock Switch ...
Страница 189: ...180 SuperScript 4400 Maintenance Guide Toner Sensor TPD Toner Sensor TTR Fram Ass y ...
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Страница 197: ...188 SuperScript 4400 Maintenance Guide Hinge arm Hinge holder Front hinge L Front Inner Cover Front Cover Unit ...
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Страница 314: ...19 NOTES ...
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Страница 317: ...P N 703 A0322 001 NEC Technologies Inc 1250 N Arlington Heights Rd Itasca IL 60143 www nectech com ...