Yamaha Sx900 Fixing Wobbly/Rattling keys

[rene1242]

Greasing the Sx900 mine had  rattling keys and i decided to grease it --the grease i used is slighty thicker and has a better consistensy in my opinion its called white lithium grease https://www.aliexpress.com/item/1005003549765692.html?spm=a2g0o.productlist.0.0.75726bcc0ixXo4&algo_pvid=f13d9698-d510-47ad-86f2-212b6e795d52&algo_exp_id=f13d9698-d510-47ad-86f2-212b6e795d52-14&pdp_ext_f=%7B%22sku_id%22%3A%2212000026250071631%22%7D&pdp_npi=2%40dis%21EUR%21%211.14%21%21%21%21%21%400bb0623a16523760990241970e8ff7%2112000026250071631%21sea

Its important that the old grease is cleaned and applied ( the picture in display shows the old grease which had a very little amount and caused wobbly / rattling keys Marked with Arrows
after cleaning everything and applying grease. Now I can say that the keys feel rock solid and ive been using it for months now with no problems it even feels more solid than from when i bought it new
The process is not hard however theres lots of screws of different sizes and patience(and assortment of screws and keeping organized  is required)
on the process i used the service manual in reality i didnt need it but it kept me well up to date what to expect
I suggest go to a shop to do the procedure if you have no electronics repair background.

This is the before and after i took a small clip on https://files.fm/u/9bnwxupfc#/

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[Dievas]

I've opened the mine by watching youtube videos. Is not hard as you say. It's easy but it needs about 3-5 hours work.

I've used Synco Lube grease for mine A5000. It was a very good choice. After two months of intensive use still quiet keys

By the way, you have to regrease the inner side of all keys too, and the contact surface between black and white keys like in my pictures.






That said, those who think that the guys at Yamaha have fixed the problem in the new models are sorely mistaken.
The black keys on my new PSR-A5000 were noisy right out of the box.

[rene1242]

I've opened the mine by watching youtube videos. Is not hard as you say. It's easy but it needs about 3-5 hours work.

Yes indeed,  I greased all the parts you mentioned it's not hard as you say, but for someone who hasn't done a similar job can be hard yes that's why I recommend to do this kind of job to someone experienced
And yes synco lube is good as well ;-)

I've used Synco Lube grease for mine A5000. It was a very good choice. After two months of intensive use still quiet keys

By the way, you have to regrease the inner side of all keys too, and the contact surface between black and white keys like in my pictures.






That said, those who think that the guys at Yamaha have fixed the problem in the new models are sorely mistaken.
The black keys on my new PSR-A5000 were noisy right out of the box.