Falal error 173 on oki c5650 after changing fuser unit

Cause:
This error indicates that the Image Drum Up/Down Process is not working properly.

The errors are as follows:

140 - Yellow Drum Up/Down error
141 - Magenta Drum Up/Down error
142 - Cyan Drum Up/Down error


Resolution:

1. Reseat the Image Drums. Ensure they are in seating properly into the drum carriage.

2. Reseat the Toner Cartridges. Ensure they are seating properly into the Image Drums.

3. Reseat the Contact Sensor Spring assembly and inspect it for damage or mis-alignment. If the springs appear bent or dis-lodged reseat them.



http://my.okidata.com/PP-C7200.nsf?opendatabase