zx475ti help!!!!!!!!!!!!!

gixerboy · Post by **gixerboy** » Fri Feb 09, 2007 12:42 pm

help me please
my right rear channel just blew left one is fine
i run front and rear bridged for my comps upfront
please could any one tell me why i get music through but its distorted sound
quite handy with a soldering iron and have alot of ways and means of getting parts, will fix myself if i can get a start from someone

twisted · Post by **twisted** » Fri Feb 09, 2007 12:45 pm

might be a stupid question but
did you try a diff speaker on that channel?

Post by **Bfowler** » Fri Feb 09, 2007 12:48 pm

try unbridging it, and see if you can narrow down the distortion to 1 channel. the speaker probably took a channel out with it

gixerboy · Post by **gixerboy** » Fri Feb 09, 2007 1:27 pm

cheers for the reply
the right rear channel is blown and i have also tried a different speaker it still get distorted sound

1moreamp · Post by **1moreamp** » Fri Feb 09, 2007 1:52 pm

This is gonna sound dumb But are all the little red leds, lite up on the amp board ? There are two for each channel so there should be 8 total on a four channel amp.

I ask this because those little LEDs act like current limits and blown out from time to time and that is all that is damaged, at least I have seen this a few times, and I test with a lithium cell off a motherboard touching the two feed through points on the bottom of the board. Get the polarity right by reversing the connect point to the edge of the cell. No light either way, its blown and you get distorted sound because literally half of you signal is getting chopped off by un-powered amp circuitry. Seen this a few times or two.

If your not comfortable working on the inside of your amp save it for some that is, it will save your amp...

gixerboy · Post by **gixerboy** » Fri Feb 09, 2007 1:58 pm

ill check over the weekend hope its as simple as that.
cheers

dgoodhue · Post by **dgoodhue** » Fri Feb 09, 2007 3:01 pm

When my ZX475ti lost a rear channel (the channel put out static), it turned out be a bad crossover board.

bladestars · Post by **bladestars** » Sat Feb 10, 2007 8:08 am

dgoodhue wrote:When my ZX475ti lost a rear channel (the channel put out static), it turned out be a bad crossover board.

That seems to be a quite common problem with them. My 475 toasted the XO board as well. Thankfully it was before i bought it from the shop. Had it tested before buying and no dice! They were quite nice about it though

gixerboy · Post by **gixerboy** » Mon Feb 12, 2007 10:25 am

checked the lights and all of the red ones are on
cant see any visible blown transistors or any burn marks at all

1moreamp · Post by **1moreamp** » Mon Feb 12, 2007 11:51 am

Generally you won't see blown up parts on Phoenix Gold high end amps. PG uses a very safe design that utilizes ceramic flame proof resistors that blow like fuses. The down side is they show no signs of failure, so you must ohm meter check each one for value variance, like "open" instead of the marked value. < green and grey bodied 1/4 watt resistors>
But you get a safer better engineered product for this, that actually costs less to repair and maintain after being exposed to a failure situation.