|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
216.81.46.100
I recently got one of these back up and running (replaced the group of four small caps), but the output voltage is a little high at 122-123V (instead of 120V +/- 1V).
There are three trimpots inside, and I am guessing that one or all are required to adjust the output voltage.
Before I start experimenting, does anyone know what each of these trimpots adjust?
Follow Ups:
Please tell where the four capacitors you replaced are located, what they look like an their values...thanx, Jeff
I had mine refurbished a couple of years ago by an ex engineer. Mine was showing higher voltage just like yours and was emitting crackling noise. Once refurbished it's been working without any problems.
My advice is don't touch the trim pots if you're not sure what they do.
I expect that even reading 122 or 123 volts, the unit will perform as intended. Mine does.
Let it warm up for about 15 to 20 minutes or more and be sure you are checking the voltage with the unit plugged into the outlet you will be using it with as the variation in voltage between outlets could account for the difference.
Other than that, I would not touch it at all unless I had a service manual in front of me with the instructions of how/what to adjust. If you can't get a manual I would leave it alone. The error in your meter could account for all the difference as stated. You are only 1.6% off at the 122voltv high which cannot be harmful to any of you components as normal line variation is much more than that.
Another note; be sure that when you are adjusting specs like bias and DC balance on your other components, be sure the EP-15A is plugged into the outlet you use it with and that the component being adjusted in not only plugged into the EP-15A but the same exact receptacle and is using the same power cord it is normally used with.
5
and if you do, only screw those pots 1/2 turn in either direction and then return them exactly. If nothing responds get a schematic and leave it alone. It could also be your meter is slightly off or your measuring without a load.
So far I have only had it lightly loaded (about 100W draw).
Front panel display of voltage matches my voltmeter.
If I don't get an answer by this weekend, I will (likely) play with the trimpots as suggested.
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: