Xerox 4400DT Service Manual - Page 126
Tray 1 Feed Clutch
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Tray 1 Feed Clutch Note: Tray 1 interlocks the 24 VDC supply to the Tray 1 Size PWB, Tray 1 Feeder PWB, Tray 2 and Tray 3. Tray 2 interlocks the 24 VDC supply to the Tray 2 Size PWB, Tray 2 Feeder PWB, and Tray 3. Tray 3 interlocks the 24 VDC supply to the Tray 3 Size PWB and the Tray 3 Feeder PWB. Tray 1 Feed Clutch Troubleshooting Procedure Step Actions and Questions Yes No 1 1. Enter Service Diagnostics and select Clutch Tests. Replace the Go to step 2 2. Scroll to Tray 1 Feed and press OK. Tray 1 Feed Can you hear the Tray 1 Feed Clutch energize? Clutch (RRP 3.6 on page 6-33). If the problem persists, replace the Engine Logic Board (RRP 9.3 on page 6-89). 2 1. Remove Tray 1. Go to step 4. Go to step 3. 2. Check the voltage between the lower contact of the Paper Feeder Connector and frame ground Is the voltage +24 VDC? 3 1. Switch the printer power OFF. Replace the Replace the 2. Remove the Left Interface Cover (RRP 1.1 on Feeder PWB Engine Logic page 6-6), Left Cover (RRP 1.2 on page 6-7), and the Left Plate (RRP 1.11 on page 6-16). 3. Switch the printer power ON. 4. On the Engine Logic Board, check the voltage (RRP 3.9 on page 6-37). Board (RRP 9.3 on page 6-89). between P/J33 pin 6 and frame ground. Is the voltage +24 VDC? 4 On the left side of the Paper Tray, measure the Go to step 5. Replace the resistance between the upper and lower contacts on Paper the Paper Feeder Connector. Feeder Is there continuity between the two contacts? Connector (RRP 2.5 on page 6-26). 5 1. Switch the printer power OFF. Replace the Replace the 2. Remove the Paper Feeder Assembly (RRP 3.1 on Feeder PWB Tray 1 Feed page 6-28). 3. Disconnect P/J65 from the Feeder PWB. 4. Measure the resistance between pins 1 and 4 on the disconnected plug. Is there continuity between the two pins? (RRP 3.9 on page 6-37). If the problem persists, replace the Clutch (RRP 3.6 on page 6-33). Size PWB (RRP 3.13 on page 6-42). Phaser 4400 Laser Printer Service Manual 3-29
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