14 Feb
2011
14 Feb
'11
1:24 p.m.
Found those capacitors. Yes, they were indeed the trio that were clustered
together. All the -ve sides clustered together, and the +ve wired to a
motor output connection just as you said.
Good guess on my part :-)
Since electrolytic capacitors are cheap, and I doubt you have the
equipemtn to test them properly (both for capacitance and ESR), I would
replace them. Get replacements of the same vlaue (10uF?) and the same or
slightly hight working voltage.
It may save you haveing to rpelace the IC>
I spent tonight extracting the IC and the capactors. It went surprisingly
smoothly considering this is probably the smallest circuit board I've worked
on in terms of closeness of tracks.
Excelent. IIRC it's only a signle-sided PCB with no plated through holes,
which amkes things a litle asier for you.
Now to just wait until the ICs arrive from Hong Kong. I hope it's not by
slow boat. I've ordered and paid for the ICs but have yet to hear any kind
of acknowledgement apart from the standard paypal reciept.
I home the ICs come and that they solce the problem. If not, I will have
to think again :-)
Maintence/repair is an ongoing process with this old
iron isn't it.
It is, indeed. Pesronally, I enjoy trracking down faults, butI am sure I
am very much in the minority.
However, I would say that, actually, a lot of my old machines are very
reliable and just work when I want them to.And I've not done shotgun
techniques like repalcign all the electrolytics in the power supply.
-tony