Failed in the middle of a measurement last night - no display, no power LED, a few red LEDs on the front panel come on intermittently at power-up. The familiar burnt smell coming from the back, but no smoke. The enclosure felt a a bit hotter than usual immediately afterwards.
The incandescents on the graticule working fine though, and they're fed off the negative PSU rail, but the positive low-voltage supply is definitely down for the count. I haven't had a chance to open it up yet but hoping it's an easy fix...
My Tek scopes don't seem to have that 'smoke' option...
I've seen more bad caps than anything else take out equipment - bring out the ESR meter and do a good run through.
A very nice looking, West German made 220/16 cap in our German Wurlitzer jukeboxes seem to like shorting out (5VDC bus). Mind you it is on the /Reset for the CPU, but I'm running into a lot of these axials that are just turning in zero ohm resistors (zealous?).
Likely something like that happened in your toy too. Tantalums love shorting out for no real reason.
John ;-#)#
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John's Jukes Ltd.
I have a COS5060 and have been using it for >20 years.
I had 3 issues with it so far... intermit connectors in the vertical amps bad solder joints and the HV seems to fade if i leave it on for over an hour and it gets too hot.
There's a "bar-cade" near me that has a couple dozen pinball games on the floor, of various vintages. What's the deal with the newer games that seem to use super-bright LEDs for every widget on the table? Like the recent Star Trek game. I can't even play them, they're blinding, can't see what I'm doing.
Most late-model massive multi online player games like that are good for PC gaming because you can set the graphics and brightness yourself. 480 pixels or even up to 1080 or even 1440 pixels with late-model computers. High gig settings, too.
Blinded by the light? Yup, many are way too bright, IMHO - but it seems a lot of people prefer that to the regular level of the old incandescent
bulbs. On the other hand pinball sales are good, and there are more manufacturers around now than for many a year. Granted most of them are single game productions, but the new guys/gals have a chance of figuring
out how to design and build machines that people want to play and may become successful. A dog or two may have been made, but I'm sure their mother loves them! There is a world of difference between the PinMAME/Virtual Pinball games
and the real machines. Much like a flight simulator doesn't mean you can
fly a real plane - however it gives you a lot of the experience so it is
easier to move to the real world of a physical pinball game. John :-#)#
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(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
Too much going on with the holidays and work the past couple weeks to have a chance to take an afternoon to sit down with it, unfortunately. Paid work has to take priority. Don't worry, though, I'm not tossing it, it's in my "probable PS-fault" section (along with the poor Korg MS2000.) ;-)
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