Xerox wc 7556 system error notify sys admin. Can't copy even with rj45 disconnected

[tonerjockey]

The call is for jams and lines, but it shows several error faults on home screen. there is no codes in error log current faults but fault history shows codes from yesterday. I disconnected the network cable, deleted the print jobs in cue and rebooted the copier but the display says "the machine is not available" and"processing job" I can't make a copy. Is this a copier controller or print controller issue??
And help would be greatly appreciated. Thank you Jim

[Mukasa]

The call is for jams and lines, but it shows several error faults on home screen. there is no codes in error log current faults but fault history shows codes from yesterday. I disconnected the network cable, deleted the print jobs in cue and rebooted the copier but the display says "the machine is not available" and"processing job" I can't make a copy. Is this a copier controller or print controller issue??
And help would be greatly appreciated. Thank you Jim

Hi
Tell me exactly what the machine is displaying om the screen
does the machine go through all the booting process , tell me what you see and which stage does it bring that fault.
don't for get to check all the consumables which needs replacement e.g toner sump...........

[MrXerox]

Sometimes when the machine just stops like that and sits in processing it is because the CPU fan on the SBC is failing. Is there a buzzing sound coming from rear right?

[tonerjockey]

Sometimes when the machine just stops like that and sits in processing it is because the CPU fan on the SBC is failing. Is there a buzzing sound coming from rear right?

Hello. well i cleaned the black laser fiber optic array, and swapped the black and yellow drum unit and it seemed to work. i don't remember hearing a bad fan. i am waiting to see if it reoccurs and if i have to go back. the customer said they wont spend money on anything they don't have to and will just replace it if.
it was a strange thing. the error code in service mode after i rebooted was dc 120 fault counters 303.316.00, 305.122.00, dc 122 fault history 373-900-00, 312-905-00, 361-373-00, 303-777-00, 372-900-00, 373-900-00.