Korg Forums

NavidSyed · Posted: Mon Jul 02, 2018 7:36 pm Post subject: Korg M3 wont power up

so it was working fine, turned off o/n next morning completely dead, no power at all, no power surges and it was connected through Furman power conditioner so I opened it up and took the K300 power adapter to local electronic store the power brick (adapter) is working fine, what else can go bad? the power board consist of resistance/ capacitors I have no way of testing them, throw me your thoughts, called the local Korg service center they told me they do not repair Korg M3 anymore as they are not able to orders parts for it..

SoundWerx · Joined: 10 Oct 2011 Posts: 29

Hello. The power board is KLM-2700. Have you conducted a visual inspection of this board? I'm not sure it's of use to you as you've already had your power supply bench tested but you could take a look at this thread:

https://www.karma-lab.com/forum/showthread.php?t=19621

Check that glass fuse!! I would be looking at that guy first. The service manual describes it as:

500464071003 FUSE FUSE 125V 4A 0233004.MXP 1

Available at tons of places including:
https://www.mouser.com/ProductDetail/Littelfuse/0233004MXP?qs=WtG364jHAdwH8EdkOD5HrQ==

If that's blown then that's an easy fix. However if you replace it AND it continues to blow then you have a more serious problem.

NavidSyed · Posted: Mon Jul 02, 2018 11:20 pm Post subject:

thank you for the suggestions and links I will update you how it goes, thanks again

NavidSyed · Posted: Sat Aug 04, 2018 7:37 pm Post subject:

so just to update, the power board (part KLM-2700) was bad I replaced it actually had to buy the the whole power unit from eBay which included a new power adapter and assembly, but so far all is working well. fingers crossed Shocked