Question about Yamaha DSPE390 Amplifier

2 Answers

Power suply no osolation on power suply i change regulator and other capacitor

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert who has answered 200 questions.

  • Expert
  • 236 Answers
Re: power suply

Can you explain more of what is your concern? what help do you need.


Posted on Mar 19, 2008

  • Level 1:

    An expert who has achieved level 1.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 8 Answers
Re: power suply

Osolation? What do you mean - isolation, or oscillation?

Posted on Sep 03, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Hi i have a hitachi ax m140 power amplifier there's no standby light dead can you help please

Check the power supply rails on the secondary side of the power


• Check the presence of AC outputs on the transformer secondary


• Check the diodes and capacitor circuit

• Check the regulator circuits

Post image so we can undestand better ( only if possible )

and guide you accordingly.

Aug 02, 2012 | M-Audio Amplifiers & Preamps

1 Answer

Buzzing or humming sound on crown macrotech 2400

Possible failure of the FILTER capacitor to the power supply, fault in the power supply , DRY solder joints in the power supply or a regulator failure.
You need to check this out with a Voltage check on the board, attempt only if you are versed with this section.

Jul 02, 2012 | Technics SUV500 2-Channel Amplifier

1 Answer

Yamaha dsp a1000 won't power up

Your power suply is defective and needs repair.
Or the power amp is shorted will blow inside fuse power line

May 15, 2012 | Yamaha DSP-A1000 5-Channel Amplifier

1 Answer

McIntosh C-39 preamplifier will not power on. Over the last several months this problem has gotten progressively worse, from taking several tries with either the remote or physically pressing the power...

Hi there,
Is it plugged in directly to the wall or are you using a Uninterrupted Power Supply or Auto Voltage Regulator?
Check for any signs of overheating on the Capacitors and the IC's usually this intermittent shutdown can be caused by a faulty capacitor which cannot hold the electricity and thus causing the unit to shutdown.
Hope this helps!

Aug 14, 2011 | Amplifiers & Preamps

1 Answer

When i switch on the power suply it automatically shutdown or auto power off.

some power cables inside your system must be in should check that out

May 18, 2011 | Pioneer Amplifiers & Preamps

1 Answer

Standby button gets dull then gets bright

this like problem with power suply section, change it with anther one

Jan 19, 2011 | Pioneer Amplifiers & Preamps

1 Answer

The fuse keeps blowing in my amp, changed the fuse several times but just keeps blowing!!!

You have an overload in either the power supply section or Main amp section. Culprits in the power supply are the transformer, the Large Capacitors, rectifier, voltage regulator.
In the Main amp anything on the heat sink.
Look carefully for burnt or damaged parts. If there's more than one fuse, follow the path of the one that is blowing it might lead you to the suspect.

Dec 15, 2009 | Alesis RA-150 Amplifier

2 Answers

Pioneer power amp m-770 keeps blowing the 6.3 amp fuse what could be wrong?

Suspect an overload in the power supply or audio output stage.
Power supply culprits include transformer, the big capacitors, diodes, bridge rectifier, voltage regulator etc.
Audio culprits are anything on the heat sink(s).
Look for burnt, damaged parts too, anything running very hot!
Follow the circuit from the fuse see where it takes you too start.

Nov 05, 2009 | Pioneer Amplifiers & Preamps

2 Answers

I Need a power suply

These units don't have a separate "power suppy" per se. There is a power transformer and a separate board that contains the standby power supply components. The main power supply components are on the main board.

Rather than looking for a "power supply", what is the problem with the unit? Is there a standby light?


Mar 13, 2009 | Sony Amplifiers & Preamps

1 Answer

Dual mono?

If it had dual power supplies, the unit would still have sound on one channel

May 20, 2007 | Aragon 28K MKII 2-Channel Amplifier

Not finding what you are looking for?
Yamaha DSPE390 Amplifier Logo

Related Topics:

50 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Amplifiers & Preamps Experts


Level 3 Expert

4502 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

The Knight
The Knight

Level 3 Expert

66352 Answers

Are you a Yamaha Amplifier and Preamp Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides