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Old Proton 420 clock radio needs battery to hold memory of stations and time. What battery do I ask for to replace old one? I want to buy battery before I take radio apart.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Proton Model RS-420 clock radio lost power back-up

The battery is located on the display circuit board at the front of the unit. It's a bit of a pain to get to.

You'll need to open the case, unplugging the wiring harness plugs so you can take the two halves apart. Next, remove the strip of circuit board at the top where the snooze/alarm and other top button switches are. Then you will be able to get to all of the screws holding the display circuit board to the front of the case. The battery is soldered to the board. I'm not sure what type or voltage it is, but it's probably a single-cell NiCd at 1.2v. I think the best replacement would be a supercapacitor but I need to figure out exactly what the battery is first.

It's a great radio that's worth fixing. If anyone can tell us what the battery is, please post! Mine says "860" on it.

Cheers,

- Phil

Posted on May 31, 2009

yammy_alf
  • 666 Answers

SOURCE: Proton 320 clock radio won't stay off. Comes back on by itself!

check power switch if not block and i good position. and also monitor by multitester if the continuity of that switch cut in off position.

Posted on Apr 13, 2010

  • 15 Answers

SOURCE: Lost my 'off' ' button on my Proton 320 clock

No need to worry, you can buy adjustable knobs and at radioshack and ebay. However if the button broke off you need to go in and replace it.

Posted on Oct 05, 2010

  • 13 Answers

SOURCE: tuning lamp on Proton 320 clock radio

The original is an incandescent 14V 30mA bulb. Hard to get. Much easier to substitute a Blue or Green 3V 30mA LED, in series with a 470ohm 1W carbon resistor, to reduce the 14V to 3V. The LED will last almost forever. Don't forget that an LED is polarity-sensitive, and must be connected appropriately Long-leg to RED, and Short-leg to BLACK.

Posted on Jul 20, 2011

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Hi and thank you for using fixya:

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Proton Model RS-420 clock radio lost power back-up


The battery is located on the display circuit board at the front of the unit. It's a bit of a pain to get to.

You'll need to open the case, unplugging the wiring harness plugs so you can take the two halves apart. Next, remove the strip of circuit board at the top where the snooze/alarm and other top button switches are. Then you will be able to get to all of the screws holding the display circuit board to the front of the case. The battery is soldered to the board. I'm not sure what type or voltage it is, but it's probably a single-cell NiCd at 1.2v. I think the best replacement would be a supercapacitor but I need to figure out exactly what the battery is first.

It's a great radio that's worth fixing. If anyone can tell us what the battery is, please post! Mine says "860" on it.

Cheers,

- Phil

Apr 30, 2007 | Proton R5A Clock Radio

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