Professional Repairs?

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Professional Repairs?

Postby SeattleRoomba » March 27th, 2018, 4:54 pm

Good Morning....new poster here....

I've owned Roomba's since 2002 or so (currently have 9 old gray and white Discovery's, 4XXX series). There was once a fellow who had a repair shop, I want to say somewhere in Ohio, at the time I had 5 or so of these old guys....I sent them to him in 2010 or so, he got them all jazzed up, sent back and they ran just fine for a fairly long time (my place: 3,200 sf, all concrete floors, 9 distinct rooms), one for each room, easy squeezy...go in, push a button, every few months, empty the dirt bin, all was well....but, I kind of forgot to use them (hired a housekeeper) and 5 years later, they're not running well at all.

I was hopeful some here may have a link to a good repair place?

I've done all the resets, cleaned them well, but I'm a bit afraid to tear them down to do a full scale interior cleaning and I'm not tech savvy enough to test the battery to see if it's dead or failing (I'm sure all of the batteries need replacing). Plus, I've seen all these ads for 2,200 ah or 3,300 ah or even 4,400 ah batteries and...my head is exploding.

I just purchased a 980....LOOOOOOVE it! What a fantastic device....but I'm just not ready to send these older guys out to pasture yet.

Any help would be greatly appreciated. :)

Thanks!
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Re: Professional Repairs?

Postby Brett » March 27th, 2018, 10:18 pm

Ed is your man (see vic7767 on here) for the older units - he's just a quick 2377 mile jaunt down the road...
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Re: Professional Repairs?

Postby leonicholson » March 27th, 2018, 10:26 pm

Very simple to replace a battery.

Just look on utube for directions.
https://youtu.be/dJshpL7VHss

Buy an Ebay battery like: (If your battery looks like this)
https://www.ebay.com/itm/3500mAh-For-iR ... SwhaBasHos

Try it in each of your Roombas.
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Re: Professional Repairs?

Postby harby » June 2nd, 2018, 2:43 pm

You will likely find that you have a lot more good Roombas than you have good battery packs.

One thing important when revisiting the robots is to not try to charge completely dead batteries in the Roomba 4xxx, you can overheat and blow circuit board components.
Instead, first use a 12 volt power adapter or charger and connect positive (+) to the outside top slot and negative (-) to the inner top slot of the battery, and pre-charge the battery for a few hours to get them up to a working voltage the Roomba can deal with.
Image

Actually, not that simple to rebuild batteries. The battery case has both security screws and the plastic is ultrasonically welded, so cracking them open takes a chisel in the right places with some experience, and then the 12 Sub-C NiMH batteries still are about $40 for a quality set (you get what you pay for). You then have to prep surfaces and solder with fast high heat to not overheat the cel, if you haven't made a tack welder. One interesting fact is the higher mAh rating batteries often have higher internal resistance, so you actually run less time with high loads like Roomba (and the rating is more often a lie).

Even though I have a pretty expensive battery reconditioner that can also measure NiMH pack capacity, it is still tedious to refurbish marginal old battery packs without just replacing all the cells - charging them up, identifying bad cells, measuring internal resistance and matching the best cels from several packs. I also have several more 4000/400 and 500 series than I have battery packs to go in them.

There's many revisions of both software and hardware in this series. I would generally recycle ones that don't have a pivoting front wheel, as they will also have old firmware and are missing other hardware revisions too. I have a scheduler remote to get them to at least the scheduler firmware, if not the V3 OSMO firmware. Also discard chargers that are not "A" serial numbers, as they have a fault that can damage the Roomba in certain circumstances.

Then you just have to put together the best Roomba from the parts you have, using good wheel motors and tread, latest revision brushes and best gearboxes, etc, of course while disassembling and cleaning the motor and gearbox.

4000 series otherwise are pretty solid, they don't have known problems like the 500 series with IR emitters going out and hairballs melting the gearbox internals.

I'm in Portland, if you still want someone to go thru your roo-bots and let you know the condition of what you have and get some going 100%.
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