Question about Yamaha Music

1 Answer

Dead nothing on display but power supply lead checks out okay 11.5 volts in nothing happens no power up or display PSRE 403 yamaha

Posted by on

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Yamaha Master
  • 5,603 Answers

If the power supply is NOT the original one, it may be reversed polarity.

The supply should be a PA-3C with the center being "+".

Posted on Sep 23, 2009

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

How can I repair np-11 wont sound


Hi, The reason for no sound could be many things.

Do you have power to the keyboard ( Red light, display lit up ? ) If not could be power supply or power input socket ( these fail and need repairing frequently on older models )

If you have power then check nothing stuck in headphone socket as this would stop sound.

If nothing stuck in headphones, does it work on headphones. If it does it is probably the amplifier that has stopped working.

If you can provide more specific I may be able to help further.

Dan

Oct 30, 2014 | Yamaha Music

1 Answer

Model Yamaha ME-50 no power


John
With AC power off.
Use a meter (on Ohms scale) to check internal fuse for blown (open) fuse.
If you feel qualified & safe with AC Power On.
Check input to internal power supply on AC Scale (Caution when AC is on) for volts in.
Use meter on internal Power Supply for "probably" DC volts leaving internal Power Supply electronics to power the rest of the electronic circuits.
Switch mode power supplies can break down. They stop doing their high frequency switching so they don't convert AC to DC.
If this P/Sup is a separate box or circuit board, inside the unit, then it can have a part number & be replaced.
Good Luck

Jul 14, 2014 | Yamaha Music

2 Answers

Repairing Yamaha psr-12


If the power adapter is not the original adappter- check to make sure the polarity is correct- it should be marked on the keyboard near the adapter socket, and also on the adapter itself.

The keyboard should have an internal fuse- check that. Then with keyboard open, if the fuse is okay, trace the power flow from the power pack and look for broken wires, bad solder connections, stressed components like bulging capacitors, etc. It may have a burned out zener diode in the power supply regulator portion of the main circuit.

Mar 29, 2012 | Yamaha PSR-E223 keyboard

1 Answer

My Musical Fidelity Musical Fidelity XA-2 has suddenly lost some of it's depth and transparency of sound.


First is to check to make sure the power supply is putting out enough power.

From your description, it sounds like the classic signal "clipping" situation.

Since I tend to work from experience repairing a wide range of things, and I am not finding any references to your amp, not even in Russian sources, not even a picture, I have to make some assumptions for the moment, but this will help locate the problem.

Solder some test leads to an impedance matching transformer and the other winding to a plug that will fit your good headphones.

With chassis underside exposed, power up the amp, and apply a song you know well to the input. Use the test leads to check the 4558 IC's that are most likely to be found in the preamp stage(s) of the amp. and follow down the audio chain until you reach the power hybrids. If you happen to have the discrete transistors, those are better to work with and much easier to test.

If I am testing an amp in this way, I am listening for a dead spot, or a spot where the signal is very distorted. Being careful not to touch the power buss. Simply putting a test clip on one lead and attaching it to chassis ground is the easiest and fastest way to run through an amp.

if I am checking discrete transistors, I am just checking at the base lead of each one, or the gate if it is a FET until I find a distorted stage.

If you have power hybrid IC's, check at the website of the manufacturer of the IC for data sheets on that chip. Use those as a guide for checking voltages for the hybrid, as well as to help potential shorted components such as a capacitor or a resistor that may have failed.

If I know more details of the chips the amp uses, discrete transistors, or even if it happens to be a tube amp I can be much more specific.
Other things to check that are not always apparent- make sure there is a +15 colt supply and a -15 volt supply with respect to chassis ground when dealing with 4558 amp chips.

Feb 03, 2012 | Music

1 Answer

Yamaha psr-280 flashing display no key response or sound. Is it dead??


Your adapter should be a 12 volt DC delivering 2 amps (2000 ma). If the adapter is too small, you will have the symptoms you are seeing. Make sure the polarity is correct. DO NOT use the so called "universal adapters".

Apr 13, 2011 | HQRP AC Adapter / Power Supply for Yamaha...

1 Answer

Yamaha P155 wont power up, replaced power supply w correct one. Any ideas?


Double check the supply... it should be a PA301 which is 16 volt DC at 3.5 amps... fairly hefty one.

Download these schematics:

http://elektrotanya.com/yamaha_psr-1500_3000_sm.pdf/download.html

and

http://elektrotanya.com/yamaha_p-120_s.pdf/download.html

A lot of Yamaha have similar circuits between different models.

When you go to these links, scroll down the page looking for a small link "Get Manual". They will only let you download two a day without registering.

The first of these has the power entry on page 154... the second is on page 60. Both use the 16 volt power adapter. See if one of these schematics is not close enough to your unit to troubleshoot it.

Mar 26, 2011 | Yamaha P-155 Electronic Piano

1 Answer

Put wrong power adapter into a Yamaha DTXPRESS IV


You should immediately quarantine what you plugged in and compare it to the correct one.

IF you put too low aq voltage of the CORRECT polarity nothing should have happened.

If you put backwards polarity of any voltage the regulator is probably fried internally and possibly an input bypass cap. Also if you put an AC adapter and it wants a DC the same destruction could happen.

if you put too high a voltage, possibly the power input cap may be bad.

It appears that the correct supply is the PA3C which is a 12 volt, 700ma with positive on the center pin.

Mar 29, 2010 | Yamaha Music

1 Answer

I have Yamaha psr 260 and I am connect on 24V, and now speakers dont work. What am I doing?


I believe that is the wrong VOLTAGE !!!

The PSR takes a 12 volt, 1 amp or more DC power supply with positive on the pin.

If you have connected 24 volts either AC or DC of either polarity you have likely caused internal damage. Try a 12 volt DC supply and if it doesn't work, it needs to go to a repair facility.

ALWAYS check the voltage and the polarity on ANY of the devices using the power adapters BEFORE connecting the adapter..

Feb 18, 2010 | Yamaha Music

2 Answers

No sound from Yamaha Electone HS-6


First check if you get sound from the headphone jack.

Do you hear anything as the power comes on from the speakers..? A slight bump?

A lot of these dead audio things can be traced to a failure at the expression pedal. often these use a light dependent resistor and the illuminating lamp burns out. This is all down by the pedal.

Many of the Yamaha organs, including the FX20 I have, have circuitry that checks that the power amp has DC balance before a relay closes to connect the speaker. A failure in the amp can cause dead sound as well.

Jan 12, 2010 | Yamaha Music

1 Answer

Yamaha CVP 309-When I power it up, red power light comes on, but


You have to remember that the voltages coming out of the power transformer are A.C. and the voltages used by the devices in the keyboard are D.C. Check for voltage rectifier I.C.s between the transformer and the rtest of the circuits. They should look like squares with 3 pins coming out of the bottom of them and metal backs that protrude above the top of the black squares. Use a volt ohm meter on direct current range and clip the black lead to a circuit ground such as a ground on an output jack. Touch each pin one at a time taking note of the voltage. If you find one that has the same voltage on all 3 pins it is probably shorted. I think the voltage should be about 12volts direct current positive or negative depending on the circuit. Each one will have a code that you can cross reference on the net to find the pinouts and specs. The same thing goes for all the I.C.s If you can find the pinouts for any that you suspect look for the power supply pins and check what the voltage is. Some will have two supplies, one negative and the other positive. If you find an I.C. with power at all pins or ones that should have no power only signal then it is likely shorted. Go slowly and don't bridge two pins at once by accident and you might be able to find the problem without the schematic or a service manual. There is a memory battery (CR2032) that power the memory that might be dead but that should only affect the programmed sounds not the LED or the amp chip. Hope this helps. Do not measure A.C. with the D.C. range or you'll burn out your meter. Use safety precautions with a live device.

Aug 10, 2009 | Music

Not finding what you are looking for?
Music Logo

Related Topics:

88 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Music Experts

Matthew Spark
Matthew Spark

Level 3 Expert

1066 Answers

Mike

Level 3 Expert

4340 Answers

Brad Brown

Level 3 Expert

15645 Answers

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

Answer questions

Manuals & User Guides

Loading...