Xerox 4400DT Service Manual - Page 72
Toner is Low
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Toner is Low. (J5: Toner Low) The Print Cartridge is almost empty. Print Cartridge Low Toner Troubleshooting Procedure Step Actions and Questions Yes No 1 Install a new Print Cartridge. Go to step 2. Problem Does the Replace Print Cartridge message still solved. appear? 2 1. Remove the Front Cover (RRP 1.6 on page 6-11) and Go to step 5. Go to step 3. the Left Front Cover (RRP 1.7 on page 6-12). 2. Cheat the Front Cover Interlock Switch. 3. On the Connector PWB, check the voltage between P/J42 pin 4 and frame ground. Is the voltage 0.0 VDC with the print cartridge installed and +3.3 VDC with the print cartridge removed? 3 Check the voltage between P/J42 pin 3 and pin 1. Is the voltage +24 VDC? Replace the Toner Sensor (RRP 5.2 on page 6-59). Go to step 4. 4 On the Connector PWB, check the voltage between Replace the Check the P/J231 pin 11 and pin 12. Connector Connector Is the voltage +24 VDC? PWB (RRP 9.7 on Harness Assembly. If page 6-94). OK, replace the Engine Logic Board (RRP 9.3 on page 6-89). 5 On the connector PWB, check the voltage between Check the Replace the P/J231 pin 9 and frame ground. Connector Connector Is the voltage 0.0 VDC with the print cartridge installed and +3.3 VDC with the print cartridge removed? Harness Assembly. If OK, replace the Engine PWB (RRP 9.7 on page 6-94). Logic Board (RRP 9.3 on page 6-89). Phaser 4400 Laser Printer Service Manual 2-35