Simon, Die checked the filter elco's. You should check the leakage current and ESR values. If the mosfet is running hot you should check the board for shortcuts. Tantalum caps have a habit of getting shortened when they get aged. Also a not working driver can cause a large current, this can be checked with a scope. Check the signals at the base of the drive transistors. I suppose you checked the voltages for ripple and noise. -Rik -----Oorspronkelijk bericht----- Van: "Simon Claessen" <simski at dds.nl> Verzonden: ?13-?2-?2014 10:00 Aan: "On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Onderwerp: Re: LA12 correspondent On 12-02-14 23:18, Tony Duell wrote: The mosfet runs hot, even with the original cooling, and the paper is not advancing, so there must be something wrong somewere else in the machine. I actually would love to find out what type of transistor was there originally relabeled as digital part # 151278200 -- Met vriendelijke Groet, Simon Claessen drukknop.nl