Lexmark C750 Service Manual - Page 124

5060-00x 925 Error code Fuser fan Step 1 Actions and questions Turn the power off and manually spin the fan and check that it rotates freely. Does the fan rotate freely? 2 Check the fuser fan cable connection to the engine board, J2 for correct installation. Is the cable installed correctly? 3 Disconnect the fuser fan from J2 on the engine board and check the voltages on J2. Pin Fan on Fan off Fan Fan disconnected disconnected Fan switch on Fan switch off +3.3 V dc 0V 0V +24 V dc +3.3 V dc 0V +2 V dc +24 V dc Yes Go to step 2 No Replace the fuser fan. See "Fuser fan removal" on page 4-34 Install the cable correctly Go to step 3 Replace the fuser tan. See "Fuser fan removal" on page 4-34 Replace the engine board. See "Engine board removal" on page 4-29 J2-1 J2-2 J2-3 J2-4 +1.6 V dc 0V +1.9 V dc +24 V dc +3.3 V dc 0V 0 V dc +24 V dc Are the voltages correct? 926 Error code VTB Fan Note: The VTB fan is turned on during POR and while printing. Step 1 Actions and questions Turn the power off and manually spin the fan and check that it rotates freely. Does the fan rotate freely? Yes Go to step 2 No Replace the VTB fan. See "Vacuum transport belt (VTB) fan removal" on page 4-84. Install the cable correctly. 2 Check the VTB fan cable connection to the engine board, J4, for correct installation. Is the cable installed correctly? Go to step 3 3 Check for a piece of media or a cable caught in the fan. Is there an obstruction in the fan? Remove the obstruction. Go to step 4 2-90 Service Manual