Question about Aiwa FR-CD1500 Clock Radio

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Clock gains 5 minutes or more time over 30-45 days

My clock slowly gains time so that it eventually get's to be so far ahead of my other clocks that I must go and reset it back to the real time. I have to do this about every 60 days or so. How can an electronic clock be doing this? It's so annoying and the clock is not longer under warranty.

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SOURCE: buttons

i think the best thing to do about it is reset your clock / the button should work than if not i will you some more with it

Posted on Dec 29, 2007

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SOURCE: Slowdown more than an hour

Maybe the clock is trying to set itself back to its home time;)

Depending on which parts of china you're in, there may be radio wavelengths that is interfering with clock you have, therefore, slowing down the transmitter. of the time.

Posted on Feb 08, 2008

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I took the back up battery out and unplugged the unit for about 20 minutes before powering the clock back up. Once I powered the clock up I re-inserted the backup battery.

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I've noticed that manually setting the clock forward or back by any number of minutes, results in the same time offset being displayed after unplugging - plugging back in. So, if it's 9pm and you set if 5 minutes fast (9:05pm). Then unplug it and plug it back in 30 minutes later (9:30pm), the clock will maintain your setting of 5 minutes ahead of the actual time (9:35).

I like to set my clocks 5 minutes fast, just to make me always think I'm running a bit late (sure, maybe I'm a bit crazy). But this "sticky" manual setting is kind of a nice feature in my opinion. I'm wondering if it's not intentional?

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5 Answers

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I've had a similar problem with another model, an Oregon Scientific Model IWA-80055 Wireless Thermo Clock, in which when I replaced the batteries in the remote sensor, the clock would not read the temperature from the remote sensor.
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They used to use crystals to help the timer ics to keep time but since the development of Micropros. all this is built in to one chip. Now they will use a resonator or a small crystal for the timing clock of the micro but nowdays the manufacture uses that clock to keep all in check. If your gaining time you probably are having problems with your ac duty cycle as this also keeps clocks in check.. This would not affect most devices but could be a problem. But of course a defective Micro could also cause this gain in time And probably is?? Now a battery backup is nothing more then a battery in line with the Microproccesors B+ terminal through of course a diode as well as a voltage limiter resistor to take over the B+ when the units ac supply is absent..

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