HP (Hewlett-Packard) C3916A Printer User Manual


 
14 NO EP CART Message
The printer detects the presence of the Toner Cartridge and the
level of toner present in the cartridge through the condition of the
ANTIN signal. The ANTIN signal becomes part of the serial data
stream used to communicate with the DC Controller (see Figure
7-5 for cartridge components). Troubleshoot the 14 NO EP CART
(or INSTALL TONER CARTRIDGE) message as follows:
1 Reseat the Toner Cartridge. Try a new or known good Toner
Cartridge.
2 Check the High Voltage Contacts for damage. If the contacts
are dirty or damaged, clean the contacts after the repair.
3 Replace the High Voltage Power Supply.
4 Check and reseat the HVPS cable.
5 Replace the DC Controller.
16 Toner Low Message
The TONER LOW message results as the level of toner in the
cartridge cavity falls past the minimum level. The level is sensed
by a mechanism similar to an antenna, which detects the AC
Developer Bias Voltage applied to the developer mixture. If the
TONER LOW message cannot be cleared by shaking or replacing the
Toner Cartridge, perform the steps listed for troubleshooting the
14 NO EP CART message.
Troubleshooting 7-25