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Did you check your speaker selection switch to make sure that those units are getting power? If that is not it I am afraid that you may have a problem with the dts audio chip responsible for the decoding of the different channels ..I had this happen with my Pioneer 9700 receiver.
If you have an amplifier module that powers certain channels see if there is an amp module that powers those three areas. If so, it could be THAT amp module that is defective since lots of newer receivers do not have discrete amps for each channel and resort to modules to supply power to two or three channels at a time ala Panasonic receivers.
fuzes blow because something is overloading the equpment. First make sure you speaker wires are not shorted, or touching each other. If the speakers are not shorted out, unhook them completely and replace the fuze. turn on the equipment. if the fuze again blows (make sure its the same value fuze and not a higer rating) then you most likely have a shorted output transistor or transistors. In this case you will most likely need to take the device to an electronics service place, or if its under warranty send to the manufacture. Most often these devices cost more to fix than to replace, so its your call on that. If your handy with electronics, you could try and get the schemetic for the device and try to fix it yourself. If you have a shorted "final" or "output transistors" you most likely also have burned out driver transistors and also some resistors. It's unfortunate that today most things are "throw away". one more thing, if the device has a strong smell, then the chances are good that something burned out
Try disconnecting all the speakers and turn it on. If it stays on, then a speaker (most likely sub) is gone and shorted, causing the system to shut down to prevent it from being damaged. Hooking up one at a time and powering on should help you find the bad one. If it still shuts down with all speakers disconnected, then you've got internal problems with the system itself. Time to visit a repair man.
Hope this helps, and please rate my advice, good OR bad.
I have the same problem with my XV-DV333. Search on inet and this came up:
Pick Out One Of These!
But I am unable to select any region using the remote control or the buttons on the player. What do I do?
You need to get a Pioneer Service Remote. When you have it you should press: [ESC] [A.MON] [Numbers], where [Numbers] correspond to the region number you want to set. Be aware that you can only set this once, if you set the wrong region number for your area, there is no turning back. "
WTF! Am I supposed to get a service remote to get this thing working again. I haven't done anything and it worked before:/
Your problem could be one of three differnt things. It could be that the open close switch on the front has a bit of resistance to it, sand when you press it the switch starts to conduct and then the machine thinks someone has pressed the open/close switch again, or there are a set of small switches inside the unit that the door makes contact with when it reaches the end of the travel lenth, that is binding or broken, or there is a problem with the switch or microprocessor circuitry that is affecting the open close command. The correct repair procedture would to be to get a service manual and trace out these devices that I have just described.