throbscottle
Well-Known Member
The laser printer decided to do its fault again, after working well for a few months since I re-soldered one of the EHT driver transistors. Same symptoms, intermittent fault causing variously, a speckled stripe across a page, missing random colours, occasional blank pages. Eventually it settled down to producing blank pages.
So this time I re-worked the entire EHT board - re-soldered every single joint. Put it back together - great, it started working again!
But, couple of days later, back to faulty behaviour again. Seems to manifest randomly, doesn't look thermal. Clean out of ideas. Is it possible for one of the driver transistors to manifest an internal fault in this way?
TIA
So this time I re-worked the entire EHT board - re-soldered every single joint. Put it back together - great, it started working again!
But, couple of days later, back to faulty behaviour again. Seems to manifest randomly, doesn't look thermal. Clean out of ideas. Is it possible for one of the driver transistors to manifest an internal fault in this way?
TIA