Lexmark M410 Service Manual - Page 49

4045-XXX Fan Service Check Check the cable connections at J13 on the engine board and at the main fan assembly. The main fan runs continuously when the printer is powered on unless the printer is in the Power Saver mode. FRU 1 Fan 2 Engine Board Action Manually spin the fan and check that it rotates freely. Check the cable connection to the engine board, J13 for correct installation. Check the continuity of the cable. If incorrect, replace the cable. Perform the Cooling Fan Test in the Hardware Test Mode. Turn the cooling fan on to slow or fast. Disconnect the fan connector at J13 and measure the voltage. The voltage measures +24 V dc. If correct, replace the fan. If incorrect, replace the engine board. Fuser Service Check Cold Fuser Service Check Error codes 920, 921, and 922 may display for a cold fuser failure. A 920 error caused by low line voltage can sometimes be cleared by turning the machine off and then on again. Service Tip: Set the Fuser Temperature to NORMAL before starting this service check. Diagnostic Information 2-23