Diagnostics information 2-55Tray 2 service check840.xx service checkFRU ActionTray 2 Turn the printer off.Separate the printer from Tray 2.Turn the printer on and check the voltages on connector J28 on the engine board.Pins 1, 4: 3.3 VPin 2: 24 VPin 6: GroundIf the voltages are incorrect, then replace the engine board. If the voltages are correct, thentry using Tray 2 again. If the printer error persists, then replace Tray 2.Step Questions / actions Yes No1 POR the machine into configuration mode.Go to the disable scanner menu item. See“Disable Scanner” on page 3-36. Touch“Enable ADF/FB -Enabled and pressSubmit to save the change. POR the MFPto operating mode. Try running a copy fromthe ADF and flatbed.Did the 840.xx error recur?Go to step 2. Stop. Problem resolved.2 Re-enter Configuration mode, scroll to andselect the Disable Scanner menu item.Does the screen display ADF Disabled orAuto Disabled?Go to step 3. Go to step 8.3 Check the ADF cable connections on theADF relay card and connector J17 on thecontroller board. Also inspect the cableconnections on J28, J12, 13 and J30 on thecontroller board.Are the connections properly connected?Go to step 5. Go to step 4.4 Properly connect the connections on theADF relay card and controller board. PORthe machine into configuration mode. Go tothe disable scanner menu item. See“Disable Scanner” on page 3-36. Touch“Enable ADF/FB -Enabled and pressSubmit to save the change. POR the MFPto operating mode. Try running a copy fromthe ADF and flatbed.Did the 840.xx error recur?Go to step 5. Stop. Problem solved.5 Check the continuity on the ADF cable.Is there continuity?Go to step 7 Go to step 6.
