HP M425

Tools for troubleshooting ......................................................................................................... 55
Component diagnostics ............................................................................................ 55
LED diagnostics ........................................................................................ 55
Network LEDs ........................................................................... 55
Control panel LEDs .................................................................... 55
Engine diagnostics ................................................................................... 56
Engine test ................................................................................ 56
Diagrams ............................................................................................................... 57
Plug/jack locations ................................................................................... 57
Locations of major components .................................................................. 58
General timing chart ................................................................................. 60
General circuit diagrams ........................................................................... 61
Use HP Device Toolbox (Windows) ........................................................................... 64
Internal print-quality test pages .................................................................................. 65
Clean the paper path ............................................................................... 65
Print the configuration page ....................................................................... 65
Print-quality troubleshooting tools .............................................................................. 65
Repetitive image defect ruler ...................................................................... 65
Control panel menus ................................................................................................ 67
HP Web Services menu ............................................................................. 67
Reports menu ........................................................................................... 67
Quick Forms menu ................................................................................... 68
USB Flash Drive menu ............................................................................... 69
System Setup menu ................................................................................... 69
Service menu ........................................................................................... 72
Network Setup menu ................................................................................ 75
Interpret control-panel messages ............................................................................... 77
Control panel message types ..................................................................... 77
Control panel messages ............................................................................ 77
49 Error, Turn off then on ........................................................... 77
50.x Fuser Error ........................................................................ 77
51.XX Error .............................................................................. 77
54.XX Error .............................................................................. 78
55.X Error ................................................................................ 78
57 Fan Error, Turn off then on ..................................................... 78
59.X Error ................................................................................ 79
79 Error Turn off then on ............................................................ 79
79 Service error ........................................................................ 79
Black cartridge low ................................................................... 79
Black cartridge very low ............................................................. 80
Cleaning .................................................................................. 80
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