Phaser 4400 Laser Printer Service Manual 3-27Registration ClutchRegistration Clutch Troubleshooting ProcedureStep Actions and Questions Yes No1 1. Enter Service Diagnostics and select Clutch Tests.2. Scroll to Registration Clutch and press OK.Can you hear the Registration Clutch energize?Go to step 6. Go to step 2.2 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. Disconnect P/J23 on the Engine Logic Board.4. Measure the resistance between pins 6 and 9 on thedisconnected plug.Is the resistance approximately 145 to165 ohms?Go to step 4. Go to step 3.3 1. Remove the Front Cover (RRP 1.6 on page 6-11) andthe Left Front Cover (RRP 1.7 on page 6-12).2. Disconnect P/J43 from the Connector PWB.3. Measure the resistance between pins 1 and 2 on thedisconnected plug.Is the resistance approximately 145 to165 ohms?Replace theConnectorPWB 9.7page 6-98.Replace theRegistrationClutch (RRP5.5 onpage 6-62)Replace theEngine LogicBoard (RRP9.3 onpage 6-89).4 1. Reconnect P/J23.2. Switch the printer power ON.3. Check the voltage between P/J23 pin 6 and frameground.Is the voltage +24 VDC?Go to step 5. Replace theEngine LogicBoard (RRP9.3 onpage 6-89).5 1. Enter Service Diagnostics and select Clutch Tests.2. Scroll to Registration Clutch.3. While measuring the voltage between P/J23 pin 9and frame ground, press OK.Does the voltage drop from +24 VDC to0.0 VDC?Replace theRegistrationClutch (RRP5.5 onpage 6-62)Replace theEngine LogicBoard (RRP9.3 onpage 6-89).6 1. Switch the printer power OFF.2. Open the Front Cover and remove the PrintCartridge.3. With the Front Cover open, cheat the Front CoverInterlock.4. Enter Service Diagnostics and select MainMotor+Clutch/Sol Test.5. Scroll to Motor + Registration and press OK.Do the Registration Rolls rotate smoothlywithout stalling or jerking?Problemsolved.Replace theRegistrationClutch (RRP5.5 onpage 6-62)orRegistrationRolls (RRP5.6 onpage 6-62).
