Need Electronics HELP .... DAYSTATE MK-3 PC board likely needs a new capacitor
My ever reliable Mk3 with 12 step power is sick ... Not a battery issue, but one of the gun no longer wants to make any power ( resealed and check the valve etc ... mechanically sound )
At max power setting it simply won't get to where it would previous, stepped down it does go lower. My thoughts are the Capacitor is likely failing and simply won't charge up correctly and release the current required to fire the solenoid correctly.
DO ANY OF YOU have any experience in such matters ?
The Capacitor is marked : Hi-ripple 63V 2200 uf 25/085/21 1430 having the # RT-12 on the top end.
Help if you can ?
did you Google it a picture would be helpful but capacitor are easy to find
or the Google page
good luck I will look but I need a picture
here we go ... tad over 25mm diameter X a tad over 26mm tall
this might be a winner
I'm a little light a capacitor knowledge and the deeper I dig the more confused I get
High ripple = surge current
105c seems to be the top of temperature range
the sizes are all over the place and I'm guessing this is a two solder point capacitor
so with that said, maybe the Hitachi would work
good luck I gave it a try
Mouse electronics should have what you need. mouser.com
Thank you to all .... I have a lot more information than i can digest, so my fishing for a cure will continue in silence.
We're good for now ... thank you.
You might try wiggling those various molex connectors as well to see if any wires or pins have come loose/broken or developed some oxidation/corrosion on the contacts. Could also try giving the whole board a scrub down with higher purity IPA to clean up any leftover flux or built up gunk from over the years (analog circuits/components can be particularly sensitive to these). Both are a little simpler and non-invasive checks that can sometimes resolve a problem before going in hot and heavy for debugging.
would a cleaner like Deoxit work as, use for cleaning stereo pots
If that 07/03/07 is the date stamp, then that electrolytic capacitor is going to be way out of spec
A quick test is to solder another capacitor of similar value and voltage rating to the leads of the original (same polarities) - if trigger now works correctly, then original capacitor is bad
A better test is to buy a cheap "atmega transistor checker" from Amazon, eBay, AliExpress, etc. - does way more than check transistors - it will test the unsoldered capacitor for capacitance, and ESR - ESR is the killer - it must be within a certain range - it is also what kills rechargeable batteries
Another thing to check is the voltage on the capacitor - it should charge up to 69 or 70 volts on this circuit board
Simple explanation of ESR - the capacitor has an internal resistance that prevents it working correctly
A capacitor tester will not show it, and say the capacitor is good (high capacitance) - but an ESR meter puts a high frequency on the capacitor leads and then tests it