Comments on: Where To Find The Power Blinking Fault In Yamaha PSR-3000 Keyboard?

By: Noelbasada

Noelbasada — Mon, 02 Oct 2023 04:14:47 +0000

That problem is in TG1 board try replace ic7 an ic2 in tg1board

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By: Noelbasada

Noelbasada — Mon, 02 Oct 2023 04:10:02 +0000

In reply to Yemi.

What ic you have to replace?

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By: Yemi

Yemi — Tue, 22 Sep 2020 11:48:00 +0000

I have psr 3000 but the sound is not coming out. I have changed the sound ic yet the problem persists. What can I do?

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By: Godwin Thomas

Godwin Thomas — Wed, 15 May 2019 14:38:45 +0000

When i connect a cable to the line in port of my PasR 3000, a hissing soind occurs which gradually fades out in about 30 minutes.Can anyone explain what the problem is and how to rectify it.

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By: benny nious

benny nious — Fri, 03 Jun 2016 14:19:49 +0000

In reply to Suranga Electronics.

Can I send you a youtube video. I'm guessing this is what you are referring to in your article.

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By: Reyguel Nious

Reyguel Nious — Fri, 27 May 2016 13:33:57 +0000

https://youtu.be/pjfJ8_rOKZM

I was wondering if this ( the youtube video) is what you repaired. You may have to copy and paste the link into the address browser to view. I have been having this issue for awhile. I'm praying this is the same thing you were describing in your article. Thanks.

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By: dhel costanos

dhel costanos — Thu, 21 Apr 2016 01:44:23 +0000

If you guys problem with low volume input just contact where the parts you replace I just repair today psr-e403.have a good day to all

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By: Robert Calk

Robert Calk — Fri, 19 Feb 2016 19:01:53 +0000

Good job, Suranga.

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By: Ashish

Ashish — Fri, 19 Feb 2016 04:38:10 +0000

Awesome diagnosis. Always something to learn from suranga. Would someone chime in and recommend some must have voltage regulators numbers in the spare parts list. 7805, 7812. Any other values people recommend. A nice addition to this website would be a list of must have parts.

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By: Henrique J. G. Ulbrich

Henrique J. G. Ulbrich — Thu, 18 Feb 2016 19:04:57 +0000

Good job, Suranga. And thanks for sharing your experience again, as well as the high-quality pictures. Who wishes to know more about linear regulators of the 78XX series can access data sheets at:
https://www.fairchildsemi.com/datasheets/LM/LM7805.pdf or
https://www.sparkfun.com/datasheets/Components/LM7805.pdf
First comment: it's possible that the IC you'd taken out was in good condition; what could be happening was a thermal overload protection feature inherent to the IC design. As there was no heat sink, this thermal overload feature lead to a shutdown, so protecting the IC. If this IC is employed in another low-current task, it will probably perform well. In the present case, you had no choice than use an IC with a thermal tab (the same as mounting tab) and mount it on a heat sink (at least that is the way as I understood it, in an existing heat sink). In these instances, there's a detail that must not be forgotten: the center lead of the IC generally have electrical contact with the thermal (mounting) tab. So, the mounting tab and the heat sink employed must be at the same electric potencial.
Second comment: Is this really a Yamaha design? It’s unbelievable that such a renowned company develop a circuit with a so unacceptable error!

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