On 2/22/2017 6:44 PM, Kenny wrote:
replying to timnels, Kenny wrote:
I don't know what sort of timer is a T103. But I have a very old (but
excellently designed) Oasis Dundee 9 Station irrigation pump controller,
which
very recently developed an issue where its digital clock was running too
fast.
About an hour later, the clock would be something like 7 minutes or so
ahead
of 'actual' time of day. My controller doesn't appear to have a 'crystal'
component on the circuit board. But it normally keeps the correct time even
when AC power is switched off, and powered by a back-up battery. So
there must
be an oscillator circuit in my board's circuit - somewhere. The beauty
of my
particular irrigation controller is that it only has two electrolytic
capacitors in it. I changed the smaller electrolytic capacitor (a 100
microFarad one). No improvement. I then changed the larger 470
microFarad one,
which fixed the issue. As we know, due to the limits of our technology -
electrolytic capacitors are probably the number 1 cause of electronic
circuit
failures in circuits. Since my particular board had only two capacitors, it
allowed me to sort things out fairly quickly. The interesting thing is -
the
electrolytic capacitors do not necessarily need to be bulging (or
physically
broken) when they go bad or fail. But, they often will have a bulging
top if
they've failed. So, if your timer has electrolytic capacitors in it....
check
them out.

You morons have to stop responding to 10 year old posts.