Lexmark C770n Service Manual - Page 62
error code service check, Cold hot roll
UPC - 734646001151
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5061 122.04 error code service check Cold hot roll Step 1 2 3 Actions and questions Measure the voltage on connector J17-11 on the system board. The voltage should measure approximately +0.13 V dc to +0.64 V dc as the hot roll lamp turns off and on. Is the voltage correct? Remove the fuser from the printer. Check continuity of the hot roll lamp by measuring between pins 1 and 2 on the AC fuser connector on the fuser assembly. Is there continuity? Check to make sure the hot roll lamp is installed correctly. Is the hot roll lamp installed correctly? 4 Reinstall the fuser assembly. Watch to see if the lamps turn on and off as the lamp heats up. Do the lamps turn on? 5 Turn the printer on, and allow it to reach a Ready prompt. Note: The printer may not complete POR and may continue to display the error code. Remove the fuser from the printer. Measure the voltage on connector J17-6 on the system board. The voltage should measure approximately 3.3 V dc. Is the voltage correct? 6 Measure the voltage on the fuser DC control connector on the LVPS. Measure the voltage on pin 6 of the connect. Does the voltage measure approximately +3.3 V dc? Yes Go to step 2 Go to step 4 Go to step 4 Go to step 5 Go to step 6 Replace the fuser assembly. See "Fuser assembly removal" on page 4-44. No Replace the system board. See "System board removal" on page 4-89. Go to step 3 Install the lamp correctly. If this does not fix the problem, replace the fuser assembly. See "Fuser assembly removal" on page 4-44. Replace the fuser assembly. See "Fuser assembly removal" on page 4-44. Replace the system board. See "System board removal" on page 4-89. Replace the LVPS assembly. See "LVPS assembly removal" on page 4-53. 2-20 Service Manual