Lexmark C750 Service Manual - Page 87

5060-00x Step 6 Action and questions Turn the print on and allow it to reach Ready. Note: The printer may not complete POR and continues to display a 132 error. Remove the fuser assembly from the printer and measure the voltage on connector J10-6 on the engine board. The voltage should measure approximately +3.3 V dc. Is the voltage correct? Yes Go to step 7 No Replace the engine board assembly. See "Engine board removal" on page 4-29. 7 Measure the voltage on pin 6 of the fuser DC control connector. The voltage should measure approximately +3.3 V dc. Is the voltage correct? Replace the fuser assembly. See "Fuser assembly removal" on page 4-31. Replace the LVPS assembly. See "Low voltage power supply (LVPS) removal" on page 4-38. 133 Error code Cold fuser backup roll Step 1 Action and questions Measure the voltage on connector J10-12 on the engine board. The voltage should measure approximately +0.13 V dc to +0.64 V dc as the backup roll lamp turns on and off. Is the voltage correct? 2 Remove the fuser from the printer. Check continuity of the hot roll lamp by measuring between pins 2 and 5 on the AC fuser connector on the fuser assembly. Yes Replace the fuser assembly. See "Fuser assembly removal" on page 4-31. Go to step 5 No Go to step 2 Go to step 3 Is there continuity? 3 Check to make sure the backup roll lamp is installed correctly. Is the lamp installed correctly? 4 Carefully remove the lamp from the fuser assembly, being careful to only handle the lamp by the ceramic end pieces and not be the glass envelope. Warning: Use caution when handling the lamp as it is easily broken. Check continuity of the backup roll lamp. Is there continuity? Replace the fuser assembly. See "Fuser assembly removal" on page 4-31. Replace the backup lamp. Go to step 4 Install the backup roll lamp correctly. Diagnostic information 2-53