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Yamaha Clp 560 does not power up.

I may have, inadvertently, left it on. Now it shows no sign of life. Fuses look good. Burned out power supply? Any help greatly appreciated.

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  • beaniedette May 05, 2009

    I have a similiar problem where the Zoom H4 does not power up even when replacing the batteries.

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Posted on Jan 02, 2017

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SOURCE: Our Yamaha clavinova CLP-115 is buzzing, even with

Without power to the unit no sound should be generated. Make sure there are no other connections.

MAYBE you have a wall transformer behind it that is buzzing. MANY wall transformers develop buzz.

Another source is flourescent lights and even some of the low voltage halogens have noisy transformers in the base.

Posted on Nov 18, 2009

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SOURCE: Hi, My Peavey Classic 50/50 has power (leds are

Hi,

I had checked the fuse for the heater circuit and found that while it was testing on a low ohm check meter - it was not sufficiently handling the
full demand of the circuit - I put a bypass on the fuse and found the problem. The fuse appears to have been previously replaced with
a type not original - the original was a ceramic case fuse 10A.

I appear to be operational

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Posted on Dec 28, 2009

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1 Answer

No sound on my Yamaha Clavinova CLP-311


Try these steps:

  • Perhaps inadvertently, there is a MIDI settings are changed.
    Setting LOCAL-ON must be in the ON position.
    Do this (see Figure 1):
25893993-xykdzr1cdriwl1tmr4ngy0qt-3-0.jpg


  • Connect AUX OUT (at rear panel) to an external amplifier. If the sound is heard, the damage was CLP311 power-amp.25893993-xykdzr1cdriwl1tmr4ngy0qt-3-1.jpg
25893993-xykdzr1cdriwl1tmr4ngy0qt-3-3.jpg

.

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Does a Yamaha clavinova clp 760 have a fuse that may need changing


There are a number of fuses on the main power board ( by transformer ) the sizes differ depending on the country of use but are clearly marked on the board.

REMEMBER TO UNPLUG FROM THE MAINS BEFORE OPENING - if in doubt seek the advice of a qualified electrician

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1 Answer

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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.
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Hi,help me,when i power my soundcraft efx8 on,it only flashes times and times(the level meter and signal chn lamp),as it cannot power on,please give me the solutions for this.


It is something that will be localized to the power supply board. But double check to make sure the phantom power is switched off.

If you are up to opening it up, look for loose connectors, check fuses, look for bulging filter capacitors- these need to be replaced and they may be the only real casue of the problem. The caps may not show visually, but if you try carefully powering the board up, a faulty capacitor will sometimes feeling like it is boiling inside- at that point- it is boiling and shorted out. Replace with same working voltage or one step higher, and same capacitance value.

There are sometimes physically larger resistors on the power supply board- these sometimes double as fuses- intentional and unintentional. Check them for continuity, they will not show anything physical if they fail.

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1 Answer

Light is dead all fuses are good.. Maybe bad transformer ?


Probably NOT the transformer as most of these have switching type supplies. A Chauvet unit I have would not light and the problem was the socket for the Halogen bulb. The socket had burned and the contacts were so burned they would not contact the bulb. Worse, you can't even see the problem as the socket is ceramic and has a mica like cover. Replacement of the socket fixed the problem. In the Chauvet unit they had a very cleaver lamp power supply. That threw me off because there was no voltage at the socket... until I put the Oscilloscope on it... then there were tiny spikes. It turns out the supply sends tiny spikes out and IF the lamp is there and contacts are good, the supply senses the load and the feedback starts driving the supply to full output. I wasn't able to see the burned contact until I uncapped the socket. Just maybe you have a similar problem. These 250 watt Halogens with the tiny pins carring 11 amps just are ******* the contacts in the sockets.

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Here is service manual for CLP380 which should be close to your unit.

http://elektrotanya.com/yamaha_clp-380.pdf/download.html

Scroll down to get manual and click on it to download. Ignore other download links.

First thing check your power supply voltages.

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