EX5 Battery Change - how to get battery out of its holder?

The EX5 features a unique Extended Synthesis system which incorporates a number of advanced tone generator technologies. AWM2, AN, FDSP and VL. The EX5 is one of the best keyboard Yamaha ever produced.

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EX5 Battery Change - how to get battery out of its holder?

Unread post by knolan » Thu Jan 27, 2011 7:00 pm

Hi -

I need to change the battery on my EX5. I have located the battery but I can't physically get it out. I've just removed the bottom plate, not the entire base of the synth. I've looked around various forums and all suggest that getting the old battery out and the new one in is straight forward, but I've had no luck, and I'm afraid to do anythin aggressive. There's nothing wrong with my EX5 - it's just I don't know what to do.

If anyone has done this, could you describe in detail how you physically remove the old battery and place in the new one.

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Kevin.
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by Derek » Thu Jan 27, 2011 8:33 pm

I changed the EX5 battery a few months back and just levered it out of the socket and popped the new one in. I don't remember any problems or the need to force it.
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by knolan » Thu Jan 27, 2011 11:57 pm

Hi Derek -

Could I trouble you to describe the detail of how you levered it out - I know this sounds a little silly but I can't get my battery out and I'm afraid of cracking the plastic holder. Did you push it towards the gap in the plastic holder? Did you use a screw driver to push it? Did you take the entire base off the synth or did you do it through the plate hole? Did you press down on it or use a finger nail to pull it up? I'm just finding it imposibble to get it out but I am afraid of cracking the plastic battery holder.

Any details you can provide would be really appreciated.

Thanks!
Kevin.
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by Derek » Fri Jan 28, 2011 8:13 am

To be honest I can't remember! So there were no problems/issues that stuck in my mind.

I'm sure I just pushed down and with a bit of gentle pressure/leverage with my fingers it came out. I don't remember using any tools. I certainly only did the change via the plate.

I'm baffled as to why your battery is stuck; I've never heard of that before.
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by knolan » Fri Jan 28, 2011 6:59 pm

Hi Derek -

Thanks - but can I ask you - did the black holder around the battery click up and off, as in away from , the circuit board, pivoting from one point at the back of the black ring? This is really important - I tried to push the battery gently and horizontally towards the empty bit of the black circular battery holder, and the black ring holding the battert easily (and worryingly) clicked up and away from the circuit board! Is this normal - I feel I may have damaged the EX5?

Derek - or anyone else reading this - I'm in a real bind here and cannot figure out how to free the battery, and now feel I've damaged my EX5. Any particular details on how to precisely remove the battery will be very helpful. I need precise details (there's nothing in the manual on this).Thanks!

Kevin.


PS - Derek - do you own EX5Tech? If so I cannot log in, and sent a request for change of password message but received no reply. Could you point me to who runs EX5Tech so I can log into that forum to see if someone there can help me - I'm in a real bind here.

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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by synthjoe » Fri Jan 28, 2011 10:13 pm

I think posting a close-up picture would really help in pointing you to the right direction, if you can...
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by Clyde » Fri Jan 28, 2011 11:29 pm

Kevin, Derek is a moderator at the EX5Tech forum, I'm sure he can point you in the right direction.
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by Derek » Sat Jan 29, 2011 11:10 am

Err, no. the holder didn't click at all.

I'm only a humble moderator at EX5Tech. Ski is the site owner who looks after all the user accounts. If you still can't get access, then email ex5techteam@ex5tech.com and that should get Ski's attention.
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by Derek » Sun Jan 30, 2011 11:19 am

The following post on EX5Tech may be of some use.

http://www.ex5tech.com/ex5ubb_cgi/ultim ... 4&t=001253
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by knolan » Sun Jan 30, 2011 11:29 am

Well, my EX5 is now faulty. Even taken the entire bottom plate off and trying for 5-6 days to gently remove the battery, and I have now broken the plastic battery holder.

To any future EX5 users reading this and needing to change your battery - proceed with extreme caution - I spent the best part of a week trying very carefully to remove my battery and I ended up breaking the plastic battery holder. I recommend you contact Yamaha Kemble (which I should have done) and get advice there or get the service manual. As of now I still don't know how to change it successfully - so thread carefully (and if you find a solution please post it for the benefit of others).

Please also note - the youtube video pointed to by Derek did NOT work for me. I was even more gentle than that demonstrator and using a screwdriver as indicated in that video caused the black battery holder to pivot up from the circuit board. This in itself did not cause a problem - the electrical connection at the pivot point was not broken - but - on trying to gently nudge the battery out as demonstrated in that demo - the black plastic battery holder snapped! So now my battery cannot be held in place. So I suspect the way that that demo shows how to remove the battery works for some EX5's, bot others may be stiffer, holding the battery in place tighter - like mine - causing the battery holder to break if you wedge the battery out as shown there. I suspect there's another way to get the battery out.

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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by Clyde » Sun Jan 30, 2011 3:27 pm

Kevin, was there any corrosion around the battery from leakage? Though I have never seen it from a CR2032 style battery, I'm sure it could happen and that could make it difficult to remove a battery. It sounds like at this point you will need to replace the holder, I would not think it would be extremely difficult, but sure tedious and a lot of aggravation.
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by knolan » Sun Jan 30, 2011 4:49 pm

Hi Clyde -

Not a spec of any sort. I keep all my instruments very well, and there wasn't even a spec of dust in the vicinity. Certainly nothing from the battery. The instrument looks brand new inside. I just thinks it's a stiffer than usual plastic battery holder that broke!

I've improvised a solution in rolling up a small piece of paper wrapped in insulating tape (heat resistant though there's no heat in that area) and it's pressing between the back inside of the EX5, and the battery/battery holder. Insulating tape over both that and the battery itself act as an extra seal. I've tested the EX5 and it works! Battery and all.

I don't know how long that will hold, so I've emailed Dusty Miller in Yamaha to see if a replacement board is available.

I'm interested to hear from you that you think a replacement battery holder chould be available - is that a general thought or might you know of where I could get one? I'll run that past Dusty too.

Over all - for others reading this - I am reasonably capable with electronics (to the component level on analogue synths) and treat all my gear with absolute care - so this wasn't me taking a sledge hammer to a nut - my EX5 genuinely seems to have been more difficult to negotiate than the one on Youtube (where I was even more careful than that (lucky!) guy) !! So if changing you battery - do it carefully.

I have to say - taking the base plate off the EX5 is a lot of screws - but absolutely no trouble at all. I dreaded putting it back on, but it fit like a glove and wasn't a challenge.

Will report back on any findings re. a replacement board or battery holder.

Thanks,
Kevin
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by Derek » Sun Jan 30, 2011 5:20 pm

I'd check Maplin or RS or similar companies for battery holders. Replacing the entire board for a broken battery holder seems a bit of overkill to me.

Sorry to hear of your woes. I've never had trouble like that
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by synthjoe » Sun Jan 30, 2011 5:59 pm

I'm stunned - in my opinion that video is just completely wrong and will cause more users ending up with broken holders, like knolan.

The battery should have been displaced exactly the opposite direction, that's how the holder visible on the video is devised (maybe not all are like that, hence my earlier suggestion to post a close-up picture). One should pull (slide) the battery from the back of the instrument towards the front, against the spring also acting as the + contact, while pivoting the edge near the back of the instrument upwards. The battery should pop out as soon as it is pulled forward sufficiently to get unlocked from the plasctic latches formed from the plastic material of the holder. Looking at the video it must be difficult to do without taking off the whole base plate, and even then... But in case the battery is 'attacked' from the opposite side when compared to the video, it should work. A small L-shaped instrument could help to remove it, or one should try to do this with the index finger, if there's sufficient room to get to the back edge of the battery (hence the cut-out on the holder, to push the battery against the spring).

Also, the installation of the new battery is done incorrectly on the video. You should slide in the battery from the back of the instrument at an angle to latch in at the front edge of the holder, then pull further forward against the spring and finally press down the back side of the battery and release so that the spring pushes the battery back under the latches on the back end of the holder. Hardly needs any force, as opposed to what we see on the youtube video.

Indeed, it would be a bit of an overkill to get a complete board just because of the battery holder, you should be able to get a holder for a quid or two (as Derek wrote), and takes a minor soldering job to replace.

Edit: replaced 'push' with 'pull' in the text where appropriate, for better accuracy
Last edited by synthjoe on Thu Feb 10, 2011 1:40 pm, edited 1 time in total.
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Re: EX5 Battery Change - how to get battery out of its holde

Unread post by Clyde » Sun Jan 30, 2011 7:39 pm

If the battery holder is a special piece made for the EX5, then Yamaha may still have that part rather than the whole board it mounts to. If they dont, perhaps you can find a way to mount one of the many generic battery holders that are available in the $3-$10 range.
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