1st visit, e2551c having C970 on black PU. After swapped Cyan with black PU, C970 still occur and happen on Cyan PU where the drum full of toner, confirm is main charger problem...
IMG_20151012_082648.jpg
2nd visit, I swapped Cyan PU, C970 resolved, first 5 b/w copies image ok, but latter stripes appear on front/top of the print...
IMG_20151013_182839.jpg
I shut down the machine, take out the black PU & developer unit, visual check, no problem is found...When I switch on the machine, C970 occur again where it happen on Cyan PU...
3rd visit, I swapped HVT board & Cyan PU(another unit), this time CE40 occur...Replaced black developer, same problem occur...
4th visit, I've swapped back the original HVT board and finally the machine is up, but the black stripes still appear on print...Checked transfer belt, transfer belt cleaning blade, black developer unit magnetic roller, adjusted the doctor gap, but no avail...
Is it the black developer unit problem because the stripes pattern seems like from magnetic roller?
IMG_20151012_082648.jpg
2nd visit, I swapped Cyan PU, C970 resolved, first 5 b/w copies image ok, but latter stripes appear on front/top of the print...
IMG_20151013_182839.jpg
I shut down the machine, take out the black PU & developer unit, visual check, no problem is found...When I switch on the machine, C970 occur again where it happen on Cyan PU...
3rd visit, I swapped HVT board & Cyan PU(another unit), this time CE40 occur...Replaced black developer, same problem occur...
4th visit, I've swapped back the original HVT board and finally the machine is up, but the black stripes still appear on print...Checked transfer belt, transfer belt cleaning blade, black developer unit magnetic roller, adjusted the doctor gap, but no avail...
Is it the black developer unit problem because the stripes pattern seems like from magnetic roller?
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