C7901 3252ci

[bush_tech]

Hey all,

I've got an interesting fault I'd love some ideas on

The machine in question is a TaskAlfa 3252ci, its displaying a C7901 error (Drum unit K eeprom).
I think this is the first code it arrives at because there seems to be quite a major issue.
What's strange is if you go through maintenance mode there is no serial number/count information for all units (fuser,belt,drum,dev)
So basically it's as though they are not installed.

You can simulate this exact fault on a functioning machine very easily by unplugging one of the cables that connect the feed image pwb with engine pwb.

Things that have been tried: Feed image pwb, engine pwb and the loom between the two, forced firmware (completes with no error), 21+906

Both these boards loom and all the units work in another machine, and display their serial numbers/counts etc.

Any ideas where to next?

Thanks

[granata]

hi,PARTS PWB DRUM DLP CONNECT ASSY SP(302L794030)control this

[bush_tech]

hi,PARTS PWB DRUM DLP CONNECT ASSY SP(302L794030)control this

The reason I hadn't tried this was I didn't think this board could cause the machine to also not recognise the belt or fuser.
But disconnect this board from a functioning machine and it looks like this is actually the case.
Doesn't look fun to get this board out but I will post results.
Thanks

[bush_tech]

update: dlp/drum connect board made no difference, all these boards and components in question are now in a brand new 3252ci working perfectly

[granata]

wire?

[craigster]

I saw a tech pub on that error 2ND-0083 (H239)

[bush_tech]

I saw a tech pub on that error 2ND-0083 (H239)

all these units appear to be seated correctly, no pins are bent

[bush_tech]

wire?

I've checked it with a multimeter, seems fine but I guess this is basically the last thing that hasn't been replaced

[bush_tech]

wire?

update: not loom, no idea what to do now

[Tonerkiller]

Did you replace the drum?