Le code erreur j7 pour xerox workcentre pro 420

This error means that there is a Memory Error, and is caused by wrongly grounding the machine. If the problem is not grounding, you'll need to get some parts replacements, and you should book a in site thecnical visit.

pro 423 doesn't support vista or win 7

The print cartridge is empty or not correctly installed. Install again the cartridge or replace it.

Thanks.

replace drum unit chip

p/l call to xerox cust care center this bater solutions

by replacing the drum unit or replacing the crum the code j7 will be cleared

change the drum cartridge

Hello sir; The U-9 code means the main control unit/switch board problem, replace it.

Hi, I made a mistake, sorry. It is not a 423 Greyscale etc.. that I own but a Xerox Workcentre pro 420 black and white photocopier. I have but no manual to find out how or if it has a 'mirror' or 'inverse' function. Thanks 

U4 code refers to a fuser heat failure, you'll probable find the fuser roll is stone cold .Possible cause is open circuit heater or overheat thermostat popped.Either way you will need to pull out the fuser unit and check continuity of the components