J7 code is triggered when the waste chamber fills up and moves the float into the bubble, interrupting the optical sensor.
Xerox 5012/5014 cartridges use a reset fuse board located inside the connector. The connector must be un-soldered and a new one soldered in. Be very careful not to melt the cable when soldering. Make sure that you use the correct connector. The 5011 will not work in the 5012 and vice-versa. To tell if you have the correct connector, read the resistance between pin's 3 and 6. 5012/5014 connectors read 1500 ohms, while 5011 connectors read 15000 ohms.
For all XEROX90 and XEROX01 replacement chips go to the source -- http://rechargerstore.com
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