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Sharp fax machine - changing the lithium battery (yes, I know)

I know this is a long shot, but someone may know. I have a Sharp model UX- D1200SE fax machine which actually works well. But I only need it a couple times a year, so I don't leave it plugged in. It has a lithium battery that keeps time and the settings, but the manual says it must be replaced by an authorized service center. I called Sharp, and they repeated that requirement, but said they have no service center where I live, so I would have to send in the machine to them to get the battery changed. They refused to tell me how to replace the battery. Right.

I've looked over the machine carefully, and don't see any likely entry for this. And I can't find anything about this through Google.

Any info or suggestions would be appreciated.

Reply to
Peabody
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** Many Lithium cells are mounted on the main PCB, held by solder links that are attached to the cells.

For example;

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They normally last anywhere from 10 to 20 years.

So, you have to open the machine, find the cell and then get one like it.

Remove the old one and fit the new one with a soldering operation.

... Phil

Reply to
Phil Allison

The lithium battery is usually a coin cell, so-called because it's about the size and shape of a coin. It's almost universal in personal computers, to retain the BIOS settings when the machine is unplugged. My JVC and Yamaha hall synthesizers also have them to retain user settings.

It's sometimes installed in a socket, but most-often is directly soldered into the board. It should be plainly visible.

If you're handy with a soldering iron, you should have no trouble replacing it. You might want to purchase and solder in a socket, so you won't have to unsolder anything again.

Reply to
William Sommerwerck

If you don't want to lose the settings or the machine has one of those battery suicide software (when the battery dies the CMOS loses serial number or some such and you can't revive the device) - look up Capcom Suicide Battery as an example.

The best way to replace the battery is with the power on, or a second power supply providing power to the CMOS device while you replace the battery. As others have said a socket isn't a bad idea here, however get a good quality one that has plenty of grip on the battery.

Unsoldering a battery while the power is on requires an ISOLATED tip iron. A Butane soldering tool works well for example. You don't want the tip grounded or you will short out the battery while soldering it in. If your tip retains heat well you can try soldering a second battery across the solder tabs of the original by unplugging the soldering iron just before you try to solder the wires. Turning it off won't break the ground connection to the tip, you MUST unplug it!

I much prefer the Butane soldering tool for this sort of job though.

John :-#)#

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Reply to
John Robertson

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