Xerox 4400DT Service Manual - Page 133
-Sheet Feeder Feed Clutch, Sheet Feeder Feed Clutch Troubleshooting Procedure
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550-Sheet Feeder Feed Clutch The 550-Sheet Feeder is not feeding paper or not feeding paper at the correct time. 550-Sheet Feeder Feed Clutch Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics and select Clutch Tests. Go to step 5. Go to step 2. 2. Scroll to Tray 2 Feed or Tray 3 Feed and press OK. Can you hear the clutch energize? 2 1. Switch the printer power OFF. Go to step 4. Go to step 3. 2. Remove the Left Interface Cover (RRP 1.1 on page 6-6), Left Cover (RRP 1.2 on page 6-7), and the Left Plate (RRP 1.11 on page 6-16). 3. Enter Service Diagnostics and select Clutch Tests. 4. Scroll to Tray 2 Feed or Tray 3 Feed and press OK. 5. Check the voltage between each of the following pins on the Engine Logic Board and frame ground: I For Tray 2, check P/J33 pin 13 I For Tray 3, check P/J33 pin 14 Is the voltage +24.0 VDC? 3 1. Remove the Sheet Feeder Drive Assembly (RRP Replace the Replace the 11.6, page 6-125) for the affected feeder. 2. Disconnect P/J651 from the Feed Clutch. 3. Measure the resistance between the two pins on the feed clutch. Feeder PWB (RRP 11.9, page 6-128). If the Paper Feed Clutch (RRP 11.10, page 6-129). Does the resistance measure 140 to 170 ohms? problem persists, replace the Size PWB (RRP 11.19, page 6-139). 4 Press the Enter key. Does the voltage drop from +24.0 VDC to 0.0 VDC? Replace the Paper Feed Clutch (RRP 11.10, page 6-129). Replace the Engine Logic Board (RRP 9.3 on page 6-89). 5 1. Remove the Sheet Feeder Drive Assembly (RRP Go to step 6. Replace the 11.6, page 6-125) for the affected feeder. 2. Check the Paper Feed Rolls for contamination and wear. Paper Feed Rolls (RRP 11.11, Are the Paper Feed Rolls clean and in good page 6-130). condition? 6 Check the Paper Feed Assembly for binding, obstructions, or contamination. Is the feed assembly clean and in good condition? Go to step 7. Clean, repair, or replace as necessary (RRP 11.12, page 6-131). 7 If the problem persists, replace the following in order until the problem is found: I Engine Logic Board (RRP 9.3 on page 6-89) I Feeder PWB (RRP 11.9, page 6-128) I Size PWB (RRP 11.19, page 6-139) I Paper Feed Clutch (RRP 11.10, page 6-129) 3-36 Phaser 4400 Laser Printer Service Manual
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