memory presets won't hold frequency

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Posted by vinyltocdr@msn.com [ 70.105.179.46 ] on April 22, 2006 at 17:02:03:

Hello All,

i really enjoy the site. i have noticed that the digital tuning
line of the STA series of receivers such as the STA-2270, 2280,
2500, 2600 lose their memory preset stations if the receiver is not
turned on for a few days. the display goes to 87.9 when a
programmed preset is pressed.

I got my 2600 in 1989 and all thru the 1990's. it would hold the
memory presets for weeks if not months without being turned on.
Now, it will only hold them for a few days if the receiver is not
turned on DAILY. It is not really that important to me because i
rarely listen to the radio due to cd's and vinyl. if there is a
known easy fix, i would like to do it.

my questions to all: is anyone experiencing this problem in their
2500, 2600, 2270, 2280 receivers? is there a memory backup
capacitor that needs replacing? if so, where and which one? where
should i look? any help will be appreciated.

if there is one, perhaps the memory backup capacitor is not holding
a charge any more to provide a slight voltage on the chip to keep
the programmed memory presets in memory.

i do have the service manual for all of these receivers for
reference if any replies are posted. i have noticed this same
condition in the other receivers (listed above) when i have serviced
them over the past five years for others.

thanks for any help or suggestions.

steve



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