Xerox WorkCentre 7220

Background is more visible on coated paper than on plain paper.

Initial Actions

Verify that the coated paper has a worse level of background than plain pape

Procedure

Change the NVM locations listed below to increase the cleaning field voltage by approx. 10 to 20V to reduce the background on the Drum. Note that this will sacrifice the reproducibility of fine lines and highlight areas.

1. Color (YMC): Add +10-+20 to each of all the following values:
   • NVM location 753-237 CF Upper Limit Ref. Value - default = 110
   • NVM location 753-239 CF Lower Limit Ref. Value - default = 100
   • NVM location 753-241 CF Upper Limit: Lower Limit - default = 110
   • NVM location 753-243 CF Upper Limit: Upper Limit - default = 110
   • NVM location 753-245 CF Lower Limit: Lower Limit - default = 100
   • NVM location 753-247 CF Lower Limit: Upper Limit - default = 100
2. Black and White (K) or Color (K): Add +10-+20 to each of all the following values:
   • NVM location 753-238 CF Upper Limit Ref. Value - default = 110
   • NVM location 753-240 CF Lower Limit Ref. Value - default = 100
   • NVM location 753-242 CF Upper Limit: Lower Limit - default = 110
   • NVM location 753-244 CF Upper Limit: Upper Limit - default = 110
   • NVM location 753-246 CF Lower Limit: Lower Limit - default = 100
   • NVM location 753-248 CF Lower Limit: Upper Limit - default = 100