C7428 printer SC391-02/3/4

[CableGuy]

Hi All
I'm in the middle of trying to sort a fault on the C7528 printer. It popped up with SC391-04 (cyan). I swapped the drum around with the Magenta drum and the fault moved with the drum, SC391-03. And just to be sure, I swapped it over with the yellow drum and the fault again moved with it, SC391-02(ylw). So I replaced the colour drums and fired up the machine..... After making the right noises for a few seconds, it popped up with the Sc391-03. I switched the machine off and back on, again it came up with an error this time Sc391-04. After that, every time I switched it on, it would kick out any of the Sc391-02/3/4.

I tried another transfer unit in it believing the fault may be there, alas, no chance. So I'm back at the office stripping the boards of a donor machine. Before I head back after lunch, thought I'd ask the knowledgable folks out there if they may have had anything similar......

Cheers

[CableGuy]

Update

Hi
Just thought I'd update you with my latest finds, incase it's of use to anyone. Went back to the customer with a handful of spare boards. I first tried the HVT board, no go. I then swapped out the BCU board and the machine sprang into life. So BCU board it is. Unfortunately for the customer, they aren't on contract..... Sods law, the non contract customers always seem to have the expensive faults.... When will they learn?