I have a clock radio in my room that is supposed to go off everyday at 5:35am for school. If I haven't set it for a long time, such as over the weekend, it won't go off. Sometimes I will wake up at about 5:30, and wait for it to go off, but i'll look at it and it says 5:36, and it still hasen't gone off. Could this be caused by bad caps? Or maybe just bad programming?
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Re: clock radio with bad caps?
Is it battery or AC powered? In the first case I'd check battery voltage: maybe lower or higher than usual voltage may do tricks. I don't think caps can prevent the buzz to go off, it should be caused by bad programming.
ZandraxHave an happy life. -
Re: clock radio with bad caps?
might as well open it up and take a look
damn clock radios are everywhere and so difficult to find here just a plain old Casio DQ-541 digital clock. one of those AND the mobile is ok for me....
5:35am.....daaaamn
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Re: clock radio with bad caps?
With these clocks of low quality like this if it is not made by brand (not relabeled), is crap. I had a clock that did this too, intermittently didn't set off even it was set (when set, a LED is lit!).
I took a Sony clock and used chip datasheet to add relay to it for bed vibrator brick (I'm deaf). Much nicer make internally. It hasn't dropped an alarm yet.
Anyway, you could make a clock yourself.
Cheers, WizardComment
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Re: clock radio with bad caps?
It runs on a/c, but has a 9v in case power goes out, it dosen't light up the led's, but keeps the time and alarm.
Its a Trutech.
Samcon and R.M caps. none look bad. Microprocessor in there is extremely hot to the touch.Comment
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Re: clock radio with bad caps?
i have several clock radio's i had to recap.
they will still wake you up with bad caps but quite annoying.
till the caps short and the 35w4/35z5 goes poof!Comment
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Re: clock radio with bad caps?
better a clock radio that's not going off (zZz) than a clock radio that won't turn off
happened to me. cheap noname thingy.. worked fine for years...
one day it went off and i hit the snooze button.. nothing happened.. i was like "WTF?!"
nothing worked... buzzing all the f*cking time..
took me at least 5 minutes to figure out where the f*ckin cable was going to unplug it
and worst of all..:
it was saturday!!! no need to wake up at 5am for school (happened almost 9yrs ago...) WTF
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Re: clock radio with bad caps?
Wow, you need to wake up at 5:35AM for school?
Just get a new clock radio. They aren't so expensive, even for decent brands such as Sony.My gaming PC:
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Re: clock radio with bad caps?
I agree with Newbie2, chuck it out and get a new one. Probably replacing the caps or components inside it would cost more than the clock itself.
And seriously 5.35AM for school?.... that's really early.
I get up at 8AM for school (With the help of my mother screaming at me to get me up).
Sometimes I get up at 6.50AM on the days that I need to get to school early to do extension mathematics.
Don't find love, let love find you. That's why its called falling in love, because you don't force yourself to fall, you just fall. - AnonymousComment
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Re: clock radio with bad caps?
fuck getting up at 05:00. i got up then yesterday for job. came home at 15:00, slept til 19:00. Couldnt get to sleep in the night. now i feel like shit.
still if i could work 08:00-15:00 every day that would be excellentComment
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Re: clock radio with bad caps?
i guess most everyone here are youngsters.
any old farts would remember what i posted.Comment
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Re: clock radio with bad caps?
He he I'm not that old. I have seen a few old tube alarm clocks though.Originally posted by kc8adu
I did recap a few old tube radios back in 2006 for curiosity more than anything. Man those rectifier tubes get HOT! All of the radios I recapped had special venting holes directly behind them in the masonite to vent them.
One of them was a transformer type and the others were line powered AC / DC types.
I got a Grundig 2028 in non-working condition (with a frayed power cord) off E-bay for 30 bucks. I replaced the cord with a polarized one and recapped it.
The radio worked great and just a year and a half later (to clean it out of my closet) I sold it recapped for 140 I was shocked.
The veneer on the case was cracked too I didn't touch it since I don't do cabinet work.
I thought that I would lose my shirt on this but I guess I got lucky.
Ok back on topic Trutech I think I've seen that brand at Target and possibly K-Mart it's cheap Chinese crap from their TVs to their DVD players they are pretty sub-standard products.Last edited by Krankshaft; 09-04-2008, 03:38 PM.Elements of the past and the future combining to make something not quite as good as either.Comment
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Re: clock radio with bad caps?
yup, picked up a sony alarm clock at a garage sale for 5 bucks, excellent (for a clock radio,) sound quality, ALWAYS GOES OFF.
Thinking about getting a alarm clock program on my computer to utilize the 2 135W pioneer speakers, and the 500W subwoofer. Can't find one though.Comment
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Re: clock radio with bad caps?
I remember a few years back when my alarm clock wouldn't wake me up anymore if I was really tired.
So I put a data disc in an old cd player and turned the volume up full blast and told it to play when I needed to wake up.
I purposely placed it far out of my reach. Anyone who has ever tried a data disc in a cd player knows what I'm talking about.
Worked every time.
Unfortunately many new cd players mute the output if you attempt to play a data disc
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Elements of the past and the future combining to make something not quite as good as either.Comment
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Re: clock radio with bad caps?
old (& cheap) CD-Players with Sanyo Lasers don't mute the signalOriginally posted by KrankshaftUnfortunately many new cd players mute the output if you attempt to play a data disc.
especially those with a Sanyo SF-90 Laser..
(the laser in those pics doesn't seem to be original, because the original one had 2 connectors instead of directly soldered wires)
http://www.ersatzteil.justone-schnep...-58_sanyo.htmlComment
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Re: clock radio with bad caps?
oh i forgot.. 370forlife ... check your PMs on that alarm clock software thingy
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Re: clock radio with bad caps?
The newer Asus motherboards have this thing called "Asus Music Alarm" and that also acts as an alarm clock but on your PC.Don't find love, let love find you. That's why its called falling in love, because you don't force yourself to fall, you just fall. - AnonymousComment
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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... -
Hey everyone,
I'm currently working on a mid-70s Sharp Electronic Digital Clock Radio, Model FY-70CH. I found the service manual online, printed it out, and have been studying it for a while. My main reasons for tackling this are: (1) I want to learn electronics and figured I'd start with something I had on hand, and (2) I want to fix its issues. Right now, the radio sounds awful, has about 5V DC at the speaker terminals, and the alarm time setting doesn't work. But I'm not asking how to fix these problems.
Instead, here's what's been bugging me so far:
The schematic... -
I know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.
For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).
https://www.badcaps.net/filedata/fetch?id=3591771
https://www.badcaps.net/filedata/fetch?id=3591772
It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:
https://www.badcaps.net/filedata/fetch?id=359177... -
Hello I have a Emerson research clock radio model CKS3516C and the transformer went out on it ,the label on the clock radio says 120VAC 6 watt backup battery DC 3v CR2430. the numbers on the transformer ST3591C-13SEN which I can't find anywhere for it. Can anyone please tell me the AC output voltage. Thanks -
Hello,
First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.
I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.
I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
...
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