Bearcat BC855XLT Loosing Memory

[Brad]

Hi,

I have a Bearcat BC 855XLT scanner (scanning radio) in my service shop.
No schematic. The radio lost all it's memory, but I was able to reprogram
some of the channels and the radio works.

The OM says, "A unique capacitor type memory back-up eliminates the need
for batteries". I suspect that maybe this capacitor is going bad(?), but
since I don't have a schematic, I have no idea where this capacitor is
located.

Thanks in advance, Brad

Before you type your password, credit card number, etc.,
be sure there is no active keystroke logger (spyware) in your PC.

 

[PanHandler]

If it's loose, tighten it.

 

[Ken Layton]

The manual states the memory backup is only good for up to 3 days with
no power.

 

[Jeroni Paul]

The manual states the memory backup is only good for up to 3 days with
no power.

I have an old digital radio tuner with 8 presets. Its memory is kept
out of a standard 470uF capacitor, probably very low consumption SRAM
and lasts a few weeks.

 

[Franc Zabkar]

I have a Bearcat BC 855XLT scanner (scanning radio) in my service shop.
No schematic. The radio lost all it's memory, but I was able to reprogram
some of the channels and the radio works.

The OM says, "A unique capacitor type memory back-up eliminates the need
for batteries". I suspect that maybe this capacitor is going bad(?), but
since I don't have a schematic, I have no idea where this capacitor is
located.

There are some Uniden Bearcat service manuals here:
http://www.mods.dk/manual.php?brand=uniden

Your model's SM is not listed, but maybe a similar memory backup
scheme is used in other models. Be aware that the above site allows
only one free download in 4 days.

- Franc Zabkar

 

[Stacey Chuffo]

Hi,

I have a Bearcat BC 855XLT scanner (scanning radio) in my service shop.
No schematic. The radio lost all it's memory, but I was able to
reprogram
some of the channels and the radio works.

The OM says, "A unique capacitor type memory back-up eliminates the
need
for batteries". I suspect that maybe this capacitor is going bad(?),
but
since I don't have a schematic, I have no idea where this capacitor is
located.

I would hope the capacitor would be located inside the radio, where else
would the motherfucker be?

What makes you think that it's the capacitor? It could be the resistor
connected in series with the motherfucker or the memory chip itself going
bad.