VOGONS


First post, by Jackhead

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Hi,

i need to do some repair on a Korg NS5R voltage regulator and looking for the Service Manual / Schematics. Can someone help me out with it?
Searching on the net dont show up anything.

regards
Chris

Reply 1 of 6, by Jackhead

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I opened the unit and i think i see whats wrong. There are 2 blown resistors near the PSU plug on the board.
So this will be a easy fix when i know what parts i need. Anyone can help?

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Reply 2 of 6, by Jackhead

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So i contact KORG support and they are so kind to give me the service manual with the shematics.
I found it in the shematics but i dont know what they are??? They not in the parts list.
I need C121, C124, C129, C130 they look all the same typ with CE 3216.
Did anyone can tell me what they are?

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Reply 3 of 6, by koitsu

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That's funny, I just contacted Korg to ask for schematics or troubleshooting advice.
Is there any chance you could send me the service manual?

I've got an NX5R with an intermittent boot issue. Since it mostly happens only during warm start, I suspect a capacitor but it's apparently possible that heat cycling could have compromised the solder joints in other components near the PSU. I came across an instance of an NS5R where the crystal near the filter caps apparently detached from the board. Trying to investigate as much as possible before taking the shotgun approach of a full recap...!

And have you had any luck with your NS5R?

Reply 4 of 6, by koitsu

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By the way, sorry, didn't answer your question.
The parts labeled Cxxx are capacitors. If there is a parts list elsewhere in the manual... [EDIT: linked in post below]

Last edited by koitsu on 2020-10-26, 19:59. Edited 1 time in total.

Reply 6 of 6, by pentiumspeed

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Use 50V SMD capacitor around 20nF or so they are not for smoothing, is for suppressing noise hence value is small.

Cheers,

Great Northern aka Canada.