Ok, ive had this amplifier for not even a week and its already broken! I bought this because i just got new speakers and my shi**y stereo 37 watt wasnt cuttin it. Now i have them hooked up to my computer. This is where it gets interesting! The amp was working perfect for about 4 days and when i turn my computer on the next morning instantly a loud bang rocks me out of my chair. Little bit of smoke too. Fuse right? but why, and how do i replace it without spendin big bucks to a repairman? Appreciate any and all help!
Sounds like you may have had a short on one or both speakers. Check
the wires and make sure that the + and - wires are not touching. As
for replacing the fuse if you open the case you void the warranty but
it is easy to do. Take off the cover (with the unit unplugged from the
wall) and you will see the fuses most likely on the power supply
board. Make sure you replace them with the proper amp rating. The
rating should be listed on the pcb and/or should be stamped on the
metal end of the fuse itself.
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vsx405 came error dc protection chacked all power transistors c2500 ,a1948 all ok i was disconnect dc detector wire then ok after few minutes one pair burned with c945100 ohms resistors that time not fix heat sink then all replaced power on error overload with speaker and without speakers also coming error disconnect ol wire no chang pease help any expert amplifiers thanks
Fastest way to test is to disconnect all speakers and turn up the vol. If it clips it needs service, then re-connect 8ohm speakers one by one and test until you find the speaker or channel that shorts. Then take that same speaker and hook it up to another channel and test, if it shorts, you know now it is either the speaker or the wire. Now, use a new piece of speaker wire from the same channel that caused it to short, replace the old and test. If it shorts, you've got a problem with the speaker. If your handy with a multimeter, check the resistance at the speaker and you will have your answer. If you are not familliar with a multimeter, just hook up a different speaker where the bad one is and test. It's just process of elimination. Hope this helps
Try this: 1. Turn off the receiver. 2. Disconnect all the speakers from the back of the receiver. 3. Turn on the receiver. Does it still go into overload? If so, it may need repair. 4. If not, turn the receiver back off and connect one speaker at a time and turn it back on.
Most likely one of your speaker cables is shorted out causing your receiver to get overloaded. Or, one of the speakers is damaged, having the same effect.
This sounds like the amp has a system memory problem. The chips inside your amp that deal with it might be faulty or they loose the information due to a power loss, often caused by memory retention capacitors.
You can tell that to the repair man and see what he says, but personal I would go to another, try contacting Pioneer for a recommended engineer in your area.
I think you're making this way more complex than it is.
This unit should have no trouble with any reputable speaker. Don't read too much into short term impedance readings as long as you run only one speaker per channel. Every speaker has a dip somewhere in its frequency range and the Pioneer will probably protect itself and the speaker should impedance or current get too out of whack. This is a high end unit and has plenty of clean power to feed any speakers out there.
I'd buy it if I didn't already have a 6-year old predecessor (VSX-T36TX) that I paid twice as much for and has only 5 amplified channels, less features and lower power output. ;-(
I have a VSX Pioneer. Somewhere either in the back of the rfeceiver or one of the speakers there is an errant wire touching the frame. Check the back of the receiver ald all of the speaker connections. The message is to protect the speaker, but can tke out a channel on the receiver if not corrected.