Phaser 4400 Laser Printer Service Manual 3-29Tray 1 Feed ClutchNote: 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 the24 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 3Size PWB and the Tray 3 Feeder PWB.Tray 1 Feed Clutch Troubleshooting ProcedureStep Actions and Questions Yes No1 1. Enter Service Diagnostics and select Clutch Tests.2. Scroll to Tray 1 Feed and press OK.Can you hear the Tray 1 Feed Clutch energize?Replace theTray 1 FeedClutch (RRP3.6 onpage 6-33). Ifthe problempersists,replace theEngine LogicBoard (RRP9.3 onpage 6-89).Go to step 22 1. Remove Tray 1.2. Check the voltage between the lower contact of thePaper Feeder Connector and frame groundIs the voltage +24 VDC?Go to step 4. Go to step 3.3 1. Switch the printer power OFF.2. Remove the Left Interface Cover (RRP 1.1 onpage 6-6), Left Cover (RRP 1.2 on page 6-7), and theLeft Plate (RRP 1.11 on page 6-16).3. Switch the printer power ON.4. On the Engine Logic Board, check the voltagebetween P/J33 pin 6 and frame ground.Is the voltage +24 VDC?Replace theFeeder PWB(RRP 3.9 onpage 6-37).Replace theEngine LogicBoard (RRP9.3 onpage 6-89).4 On the left side of the Paper Tray, measure theresistance between the upper and lower contacts onthe Paper Feeder Connector.Is there continuity between the two contacts?Go to step 5. Replace thePaperFeederConnector(RRP 2.5 onpage 6-26).5 1. Switch the printer power OFF.2. Remove the Paper Feeder Assembly (RRP 3.1 onpage 6-28).3. Disconnect P/J65 from the Feeder PWB.4. Measure the resistance between pins 1 and 4 on thedisconnected plug.Is there continuity between the two pins?Replace theFeeder PWB(RRP 3.9 onpage 6-37). Ifthe problempersists,replace theSize PWB(RRP 3.13onpage 6-42).Replace theTray 1 FeedClutch (RRP3.6 onpage 6-33).
