2-40 Service ManualMain motor service checkFRU ActionMain motor gear driveMain motor cableLVPS/HVPSEngine boardWarning: Do notreplace the engineboard and controllerboard at the sametime. Each boardcontains the printersettings. When eitherof these boards is new,it obtains the settingsfrom the other board.Settings are lost whenboth are new andreplaced at the sametime.Turn off the printer, and unplug the main motor cable at J17 on the engine board. Turn onthe printer, and check for the following voltages at J17:Verify ground at pin 5 for both the card and cable.• If these voltages are correct, then check the main motor cable for continuity.- Remove the left side cover to access the connector on the motor.- If continuity exists on each wire, then replace the main motor gear drive whichincludes the motor.- If continuity does not exist on one or more of the wires, then call the next level ofsupport.J17 pins VoltagesPins 1-4, 6 Approx. 5 V dcPins 7-9 18 V dc-24 V dc• If these voltages are not correct, then see “Controller and engine board connectorpin values” on page 2-6. Alternatively, replace the engine board. See “Engine boardremoval” on page 2-15.
