hi
ive got a modern digital clock radio approx 15yrs old
my question is how long can a clock radio or a simple radio last ss farcas operating hours?
since elec components have limited hour lifecspan i would imagine the radio or clock radio would eventually fail.
the reason i ask is because i have my clock radio on radio function 24/7 for the past 7 years and its still working fine....i leave the radio on ..never turn off past 7years...thats approx 60000 hours
it uses very little power just a few watts i would imagine that may have something...
shelby5041
Badcaps Legend
Last Activity: 09-14-2024, 08:59 PM
Joined: 02-08-2009
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clock radio / radio lifespan?
Last edited by shelby5041; 09-14-2024, 03:39 AM. -
i did the break key and orange button and nothing shows on screen...just a few thin white horizontal lines...monitor could be bad or the machine is getting pwr but not actually booting up..bad ram..bad cpu etc...i may try selling as is or part it out .Last edited by shelby5041; 09-13-2024, 09:07 AM. -
i installed new caps ....powers on ok but monitor still blank...i can see very faint thin horizontal lines that are close spaced at top and get farther spaced tiwards bottom of screen.the lines are white colored.....the monitor is pwring on for sure....just blank....redwire ill try your procedure this week and see if i can get some kind of prompt on the screen.Last edited by shelby5041; 09-08-2024, 08:10 PM.Leave a comment:
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hi i checked the ps with the main board disconnected from the psLeave a comment:
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ive got same tv but i have no standby light..no pwr on...i checked the dc voltages on the ps and all are 0v
even if the main board is bad the power supply at a minimum should have 5v standby correct?...im thinking ps is bad.Leave a comment:
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hi..apparently my trs80 does not have a rifa cap at c2...see pic...my trs80 has 2 power supply boards that appear identical so i will order 2@c21 caps...Leave a comment:
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can someone confirm...on my version trs80 there are 2@ .1uf caps
there is no .01uf cap as someone mentioned
im going to be ordering the 2 caps soon
i only see 2 RIFA caps...1 on each power board.Leave a comment:
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yes but if monitor no display anything i no want spend long time try fix because i dont know how and maybe it not even fixable or worth fixing...we will see...this is a future projectLast edited by shelby5041; 07-18-2024, 05:57 PM.Leave a comment:
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once i replace caps i want sell it ....even if monitor no work.Leave a comment:
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thanks red
at the time i didnt know there were bright cont adj...however both pots are siezed up anyways..they dont rotate..will have to use contact cleaner and pliers to try and loosen up.Last edited by shelby5041; 07-17-2024, 02:05 AM.Leave a comment:
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i know the monitor is powering on because when i turn computer off the screen does the line dot thing in the middleLeave a comment:
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not sure..ill look at it once i get the replacement caps will be few weeksLeave a comment:
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thank u red
i know this is not a trs80 forum but is anybody here familiar with the old trs80 model3?...when powered on should there be any booting up beeps?..and should anything show up on the screen ?...mine has no beep nothing on screen but the floppy drives do spin.( prior to the cap smoking)Last edited by shelby5041; 07-16-2024, 01:50 AM.Leave a comment:
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thanks for all the info
i just want to replace the failed cap or caps with anything suitable..i think it is 0.1uf 275vac 50-60hz ...can someone send me some links so i can see what to buy...digikey preferred....note none of the alum caps are bulged.....for now i just want to remedy the one that smoked out.and others similar to that style...there may be 3or4 total....and thanks for the service manual im sure will come in handy.....hey red can u suggest alternative caps for the 0.1 and 0.01 X caps?Last edited by shelby5041; 07-15-2024, 03:05 PM.Leave a comment:
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i may be right
i found this info online
Most Common Issue … Did you Model 3/4 Go Poof!
If you turned on your Model III/4 and smoke came out, it is possible your power supply caps blew. This is very common....Leave a comment:
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old trs80 computer lots of smoke
hi
my neighbor gave me an old radio shack trs80 model3 computer...it was stored in his attic for 35yrs...i powered it on and after 5min lots of smoke was coming out of computer...i took it apart and didnt notice any fire evidence so i assume a cap split open...i looked around only saw 1 suspect part...see photo...could this be the smoke? -
thanks will check it .not sure how i missed it...guess i was looking for a F lsbel for fuse normally F1 and didnt see it...overlooked it ....i did swap tcons prior and no change...the odds of both boards having blown fuses not likely but is possible..should i have 12v at the v12v test point?.....if fuse is ok then what?Last edited by shelby5041; 05-27-2024, 07:19 PM.Leave a comment:
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here is a partial pic of my tcon.
i have 12v at the VIN pad....and at the V12V pad i have 0v...using the gnd pad for both...how can i rule out a bad tcon causing no image?...Leave a comment:
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