Xerox 4400DT Service Manual - Page 122

Print Cartridge Sensor Assembly Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 3 1. Enter Service Diagnostics and select Sensor Tests. Replace the Go to step 4. 2. Scroll to Print Cartridge Switch and press OK. Engine Logic 3. Slide the Print Cartridge out and back in two or three times. Board (RRP 9.3 on Does the message on the front panel display page 6-89). alternate between Installed and Not Installed as you slide the print cartridge out and in? 4 1. Switch the printer power OFF. Go to step 5. Replace the 2. Remove the Left Interface Cover (RRP 1.1 on Engine Logic page 6-6), Left Cover (RRP 1.2 on page 6-7), and Left Plate (RRP 1.11 on page 6-16). 3. Switch the printer power ON. 4. On the Engine Logic Board, check the voltage Board (RRP 9.3 on page 6-89). between P/J25 pin 4 and frame ground. Is the voltage +5.0 VDC? 5 1. Check the voltage between P/J25 pin 3 and frame Go to step 6. Replace the ground. 2. Slide the Print Cartridge out and back in two or three times. Print Cartridge Sensor Is the voltage 0.0 VDC with the Print Cartridge Assembly out, and +5.0 VDC with the Print Cartridge in? together with the harness (RRP 7.3, page 6-81). 6 1. Check the voltage between P/J25 pin 2 and frame Replace the Replace the ground. Engine Logic Print 2. Slide the Print Cartridge out and back in two or three times. Board (RRP 9.3 on Cartridge Sensor Is the voltage +3.3 VDC with the Print Cartridge page 6-89). Assembly out, and 0.0 VDC with the Print Cartridge in? together with the harness (RRP 7.3, page 6-81). Phaser 4400 Laser Printer Service Manual 3-25