Xerox 4400DT Service Manual - Page 106
Inoperative Printer, Inoperative Printer Troubleshooting Procedure, Actions and Questions
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Low Toner Sensor Failure Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 8 Check the Connector Harness Assembly. Is the Connector Harness Assembly OK? Replace the Engine Logic Board (RRP 9.3 on page 6-89). Replace the Connector Harness Assembly (PL 8.1 Drive and Xerographics on page 7-20 Inoperative Printer No response from printer when the main power is switched on. Inoperative Printer Troubleshooting Procedure Step Actions and Questions Yes No 1 Ensure the power cord is properly connected to the wall Go to step 2. Problem outlet and to the Power Receptacle of the printer. solved. Does the problem still exist? 2 Perform Verifying AC Power on page 3-2, then return Go to step 3. Notify here. customer Did "Verifying AC Power" indicate that correct AC voltage is being supplied to the printer? that the power is out of specification. 3 Perform DC Power (LVPS) on page 3-4, then return Go to step 5. Go to step 4. here. Did "DC Power (LVPS)" indicate that correct DC voltage is being supplied to the printer? 4 Did "DC Power (LVPS)" instruct you to replace a Replace Perform DC component? component Power as Loading on necessary. page 3-6. 5 On the Image Processor Board, check the voltage on Go to step 8. Go to step 6. J910 between pins 1 and 2. Is the voltage +3.3 VDC? 6 1. Switch the printer power OFF. Go to step 7. Replace the 2. Disconnect J910 from the Image Processor Board. LVPS (RRP 3. Switch the printer power ON. 4. Check the voltage between pins 1 and 2 on the disconnected plug. 9.5 on page 6-91). Is the voltage +3.3 VDC? Phaser 4400 Laser Printer Service Manual 3-9
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