Sound chip for YP40 has gone oc. Bendigo,Vic

Either the speakers have loosened from the faceplate, or one or more have blown. Open the amp and tighten them down. If that doesn't fix it, remove them a take them to the nearest speaker repair shop for a checkup. If blown either have them re-coned or replace them.

There are two main types of acoustic guitar namely steel-string acoustic guitars and classical guitars. Steel-string acoustic guitars produce a metallic sound that is a distinctive component of a wide range of popular genres.

Yes, can be repaired. Sounds like sound output power chip has gone bad.

One of the first things a technician does with a voltmeter it to check 'all the voltages' in a system are correct..

Even without a specific circuit diagram for the board, 'Applications Notes' for chips and seminconductors will give nominal expected voltages in a working circuit.

Remember you can burn out the meter by connecting it to any source of current when on the Ampere or Ohm settings.
Technicians usially start at a high (highest) Voltage range setting and work downwards..

Providing the maximum Voltage is not exceeded on any range, whether it is AC or DC will not damage the meter.

'Fluke' by the way are a 'top end' professional product - check the price ;)

When thosse resistors (precharrging of main input filters) burn up there is major damage. The IGBT's are usually gone... replace with APT28GA60BD15... the switching regulator IR2153 is gone... one or more of the 2SA1020-Y and the 2SC2655-Y gate drivers are gone. One or both of the DL4148 speedup diodes for the IGBT gate drives will be gone. The Wirewound ceramic resistors either 10 or 22 ohm 10 watt radials... Use:
http://www.mouser.com/ProductDetail/Ohmite/TWW10J20RE/?qs=GcOFt9%2fAxQHny%252b35G6iehQ%3d%3d
This is 20 ohms, however Behringer uses from 10 to 22 ohms in these units... 20 works fine as does 10 ohms. If you have toruble getting schematic let me know.

A lot of the effects chips run off of the +5 volt or +3.3 volt power source while a lot of the audio is off +/-12 or 15 volts. Sometimes loss of the +5 causes loss of the effects. Check that before assuming a chip is gone.

Read page 135 regarding the note range settings. Look also for keyboard split information. You may have the keyboard set to NOT play notes in the top octaves for the particular voice you are using.

Unfortunately range and power are not correlated. Good amps have a full range, cheap ones do not....range it not related directly to power output.

What are you trying to accomplish exactly?

Thanks!

This is a common problem with this pedal experienced by allot of people. My best advice would be to sell it and put the money toward a real Fender tube amp and some good pickups. If you're trying to go cheap check out some Line 6 modeling stuff.

If you are talking about a single reed instrument such as a saxophone this is how you proceed. First you have to moisten the reed using water or your own saliva. You can do this by placing it in your mouth and rubbing both sides of it with your tongue. Take particular care not to damage the tip of the reed. Take the mouthpiece in one hand and lay the reed on the flat part of the mouthpiece with the thinnest part of the reed towards the tip of the mouthpiece flatside down. The tip of the mouthpiece is the opposite end of the mouthpiece from the one that you put on the instrument. You can't mistake the two. The end that goes on the instrument is like the opening of a tube. With the reed laying flat on the mouthpiece gently slide the ligature ( clamp with one or two screws ) over the end of the mouthpiece and the reed. Take care once more not to damage the end of the reed. Line the very tip of the reed up with the very tip of the mouthpiece leaving a sliver of the mouthpiece showing. Holding the reed in position move the ligature along the reed and mouthpiece so that it is covering the bark part of the cane reed about 1/8 to 1/4 inches from where the bare part of the reed starts. Some mouthpieces have a guide line marked on them. Once the ligature is positioned you can tighten the screws. Do not overtighten them. They just need to be snug enough to secure the reed in position. The reed should be in the position I described in order to speak or vibrate easily. Now you can slightly fold your bottom lip over your bottom teeth and insert the mouthpiece and reed into your mouth. Your top lip should not be folded over your top teeth. Your top teeth should rest on the top of the mouthpiece and your bottom lip should provide a cushion between your bottom teeth and the reed. You should have as much pressure applied between your top and bottom teeth so that someone cannot easily pull the mouthpiece out of your mouth. You will learn how much pressure to apply to affect intonation and produce a good sound with practice. Now with the mouthpiece in your mouth you can blow through it to produce a sound. Your mouth should provide an airtight seal around the mouthpiece if you followed my directions. You can steady the mouthpiece with your hand while try to get a sound. If all you produce is a sqwawk that shouldn't discourage you. What you are trying to do is make a piece of wood vibrate in a controlled manner using breath pressure and your jaw muscles to control the vibration. Do not use too much pressure or the reed will be clamped shut at the tip and not be able to vibrate. You should have at least an inch between your bottom lip and the ligature as to how much mouthpiece should be in your mouth. Once you can consistently make a sound then you can proceed to putting the mouthpiece on the gooseneck with the gooseneck properly installed in the saxophone. You should rub a little cork grease on the cork of the gooseneck before putting the mouthpiece on it. The distance that the mouthpiece goes on determines the tuning. Your lip pressure also affects the tuning but a lot less in comparison. You can vary your lip pressure rhythmically to produce vibrato. Most sax players now hardly use vibrato or use a slow shallow controlled vibrato on notes at the end of phrases. Another thing to note is that to start with you should use about a number 2 reed unless your mouth is particularly sensitive and then I wouldn't go anything less than a 1 1/2 for a little while until you get used to the vibrating sensation and the feeling of your bottom lip between the reed and your bottom teeth. Hope this helps. By the way I have been playing since 1963 and I hope you enjoy it as much as I have.