Lexmark T620 Service Manual - Page 92

4069-5XX/7XX FRU 2 Main Fan to System Board Cable 3 Error Code 927 (Fan runs) 4 Error Code 927 (Fan not running) Action Check the continuity of the cable. If incorrect, replace the cable. Check the voltage at J5-1 on the system board. The voltage measures +5 V dc (static) 0 V dc (fan running). If incorrect, replace the main fan. If this does not fix the problem, replace the system board. Check the voltage at J5-3 on the system board. The voltages are: +22 V dc to +24 V dc (printer and fan running) +12 V dc to +15 V dc (printer not running - fan running about half speed). If incorrect, replace the system board. If this does not fix the problem, replace the main fan. Cartridge Fan Service Check This cartridge fan is used in models 722 and 72n Fan does not run or is noisy. FRU 1 Fan Assembly (noisy) Action Check the fan for proper installation and for excessive noise. If incorrect, replace the fan and cable assembly. 2-64 Service Manual