Analogue monitor board repair
witchy at binarydinosaurs.co.uk
Mon Oct 31 17:10:17 CDT 2016
On 31/10/2016 23:14, "drlegendre ." <drlegendre at gmail.com> wrote:
> "Hence the question - am I wasting my time without a schematic for this
> analogue board?"
> Might be helpful if you mentioned exactly what is or isn't wrong with the
> unit.. describe the symptom(s), etc.
I thought I'd ask before ploughing on with a full description. Even just
typing the original question out has made me realise what the display driver
See my replies to TonyD, there's more pictures there as well.
> On Mon, Oct 31, 2016 at 1:44 PM, Adrian Graham <witchy at binarydinosaurs.co.uk
>> I think I know the answer to this before I even ask, and that answer will
>> 'got a schematic' to which the answer's 'no and I doubt one exists any
>> My recent Executel addition has a 5" screen with associated analogue board
>> that seems to be powered from a display chip I can't find any info on, and
>> at least one of the adjustment potentiometers has suffered metal fatigue
>> I've replaced it with a seemingly common 10K modern part that I had in my
>> spares box but it's unknown whether the display worked at all prior to it
>> being put in very damp storage, also the rating of the failed pot isn't
>> known but the capacitor next to it is 50V.
>> I've also removed, checked and replaced out of spec capacitors, one of them
>> was a 680nF 50V radial. I could only find a 63V PET version on cpc's
>> and did much reading on differing capacitor types, concluding that it
>> be OK.
>> Power supply is known good because it's one of my working ones, the
>> is still dead.
>> Hence the question - am I wasting my time without a schematic for this
>> analogue board?
>> Binary Dinosaurs creator/curator
>> Www.binarydinosaurs.co.uk - the UK's biggest private home computer
Binary Dinosaurs creator/curator
Www.binarydinosaurs.co.uk - the UK's biggest private home computer
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