[net.audio] Disappearing Presets

mike@hpfclk.UUCP (06/16/84)

I don't  know if this will help but on some of the  Technics  tuners and
receivers you have to put three AA batteries  into the back of the unit,
otherwise they forget what stations they were preset to. 

Michael Bishop
hplabs!hpfcla!mike

ciampa@wivax.UUCP (06/23/84)

[]
Help!!!  I have a Kenwood digital tuner that has a very
annoying problem.  If the unit is not used for three or
more days, all my presets are gone and I have to reset
them.  Is this a simple solution to this problem?  I'm
at the brink of moving up to a new tuner (suggestions
welcome).
-- 
Robert A. Ciampa {apollo, cadmus, decvax, linus, masscomp}!wivax!ciampa
                  Wang Institute (617) 649-9731 x372

hrs@houxb.UUCP (H.SILBIGER) (06/25/84)

The Kenwood has a "non user-serviceable" NiCad battery for
backup to the preset's memory. If this NiCad is defective, you
would lose the presets memory.

Herman Silbiger CGE

fish@ihu1g.UUCP (Bob Fishell) (06/25/84)

Your presets are kept in a non-volatile memory, probably a CCD type.
These devices eventually lose their charge and erase themselves
unless they are periodically refreshed.  The instructions that came
with my Yamaha t-760 tuner stated that they'd last two or three
weeks without refreshing.  Apparently yours aren't as long-lived.

Now, do you switch on the receiver with its own power switch, or
do you use an external switch connected to the power cord, say,
a switched outlet on another component?  It might make a difference,
since some devices keep a trickle of power available for non-volatile
memory, e.g., MOS memories, even when the device is switched off.
Unplugging it, however, will cut off even that small trickle, and
your presets will disappear.
-- 

                               Bob Fishell
                               ihnp4!ihu1g!fish

bytebug@pertec.UUCP (06/26/84)

This may seem obvious, but how are you powering the unit off?  If you are
using a master power switch (such as in some of the audio cases I've looked
at), perhaps you are cutting off the AC power to the unit that maintains
the presets.  
-- 
	roger long
	pertec computer corp
	{ucbvax!unisoft | scgvaxd | trwrb | felix}!pertec!bytebug