Charlie has no memory.

[Descartridge]

My Sumo Charlie the Tuner will not store or retrieve stations from memory.
Internally, i do not see see a "pancake' capacitor or a battery. See the attachment.
Please let me know the location of station memory.
Thanks.

 

[Mr.Jim]

Sorry Charley

 

[Pio1980]

A unit this age may have a regular capacitor doing the storage charge duties.

 

[Punker X]

Looked at scat, no caps look large enough for long term memory storage.

 

[Pio1980]

Looked at scat, no caps look large enough for long term memory storage.

I didn't see any suspects either, dunno if the chip pdf shows a memory hold port somewhere.

 

[Descartridge]

Uhhhhhh,
Seems like Charlie has oldtimers and the prognosis is not good.

 

[w1jim]

Maybe on the backside of the PCB?

 

[Hyperion]

A fairly recent post with a different tuner also complained of the same problem. I checked the schematic for that tuner, and in the user or service manual it said the station memory was preserved in CMOS memory (very low leakage), thus not requiring a battery or supercapacitor. Stating that it would store stations for about a month only - providing the power was not removed from the unit, meaning, plugged in to a live power socket but not necessarily turned on at the unit. I suggested that the CMOS has gone leaky? - just might be the case here also.

 

[Descartridge]

I am having humble pie for lunch.
ASSuming the memory was on the board, i neglected to look at the rear of the case. There i found a AA battery compartment.
Problem solved.
Charlie is truly legendary.

 

[Punker X]

Must be what the scat refers to PS07, show the connection, but not what PS07 is. Probably been 15 years since I've had one come through here. Don't remember a battery.

 

[Drummerboy2]

View attachment 1631751 My Sumo Charlie the Tuner will not store or retrieve stations from memory.
Internally, i do not see see a "pancake' capacitor or a battery. See the attachment.
Please let me know the location of station memory.
Thanks.

Sorry for the late reply. I also have a Charlie that JB aligned. Glad you found the battery compartment on the back. Once the batteries have been changed out they will last a very long time! My Charlie have been modded a little and sound even better than stock. The Charlie is one of the best Tuners I have ever had and is right up there with the Big Boys! Its a very quiet tuner and sounds awesome. Enjoy!