Xerox 4400DT Service Manual - Page 116
Fuser Assembly Troubleshooting Procedure cont'd., Actions and Questions
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Fuser Assembly Troubleshooting Procedure (cont'd.) Step Actions and Questions Yes No 2 Measure the resistance between pins 3 and 4 of P272. Go to step 4. Go to step 3. Is the resistance less than 5 ohms? 3 1. Remove the Fuser Heat Rod (RRP 6.9 on page 6-77). 2. Measure the resistance of the Heat Rod. Is the resistance less than 5 ohms? Replace the Fuser Top Cover (RRP 6.9 on page 6-77). Replace the Heat Rod (RRP 6.9 on page 6-77). 4 1. Reinstall the Fuser Assembly. Go to step 5. Repair or 2. Remove the Left Interface Cover (RRP 1.1 on replace the page 6-6), Left Cover (RRP 1.2 on page 6-7), and the Left Plate (RRP 1.11 on page 6-16). 3. Disconnect P/J11 from the LVPS PWB. 4. Check the resistance between P11 pin 1 and pin 2. Fuser Harness Assembly (RRP 6.3 on Is there less than 5 ohms resistance? page 6-67). 5 1. Reconnect P/J11 and disconnect P/J27 from the Go to step 6. Repair or Engine Logic Board. 2. Measure the resistance between P/J27 pins 1 and 2. replace the Fuser Is the resistance between 7K and 380K ohms Harness (depending on the temperature of the fuser)? Assembly (RRP 6.3 on page 6-67). 6 1. Reconnect P/J27. Replace the Replace the 2. Measure the voltage on the LVPS between P/J281 pin 12 and frame ground as you switch the printer power ON. LVPS (RRP 9.5 on page 6-91). Engine Logic Board (RRP 9.3 on Is the voltage 0.0 VDC during fuser warm-up, page 6-89). then does it change to 2.8 VDC? Phaser 4400 Laser Printer Service Manual 3-19
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