maximumpower96

iTrader: (18)

Hello Peepz, my car amplifier just went bad on me. It was quite expensive, So before buying a new one, I just wanted to open it up and see what actually went bad on it and bingo! I opened it up and I could clearly see that 5 of my Chips are burnt out. Now here is the problem I am very good with replacing anything on the circuit boards, Soldering iron and all that I excel in that, the only problem is I suck in identifying the chips. Now below i am including the picture, can someone tell me what kind of chip is that? and where i can find it? the #s on the chip are as follows
FW1029
FQP
50N06

black5spdmax

iTrader: (1)

you cooked the output transistors

I would assume that the amp will be repairable by a trained professional. What type of amp is this???

erty67

iTrader: (104)

I believe the top # is the most important. Your best bet would be to take one out and bring it to a electronics shop and ask them if they can get a replacement chip. They can usually get replacements from ECG, SK, or NTE(chip manufacturers). Also, howo do you know those are cooked? How did you identify that they were cooked? Your top pics show the smaller chips. I would think the output chips were the bigger ones.( on the right in your bottom pic)

friendhasmax

looks like a 50 amp MOSFET transistor....can usually get a quality replacement for like 13 bucks ( for like 10 or 15 chips)..they come in packs usually

i think the one in ur amp is from Motorola...an equivalent from NTE is NTE2395

nupe500

iTrader: (13)

You could easily just plug the numbers into the texas instruments website or motorola and that would get you a price as well

ABS

A few points:

Output transistors don't usually burn out unless something really bad happened. Most amps typically have protection circuitry that would prevent an external short from frying the amp itself. What I would like to know is how you determined that the transistors were bad? Next, suppose you are correct that they are bad, you'll also have to figure out what caused them to burn out - was it a bad diode, a burnt out resistor, a bad cap, etc. or perhaps something else like too low of a load/impedance being driven or overheating? Bottom line is that you have to fix not just the obvious problem but also the original cause of the issue.

A really good site to lookup new transistors with an x-ref is www.nteinc.com .

Good luck!

ABS

Matt93SE

iTrader: (44)

As ABS said, something caused those transistors to blow.. and you didn't burn just one. I can see the leads are damaged on at least two of them.

In order to properly fix it, you need to first find the cause of the problem.. When did it die? while you were pounding the living daylights out of it, or were you playing at decent levels?

What kind of amp is this? (brand and model #)
Is it still in warranty?

In order to replace output transistors, you usually need to replace ALL of them on that side. they're often matched so that they all bias properly. anymore they don't do that as much, but you still don't want to switch brands on output transistors and end up causing more problems than you have now.
if you can't find an exact replacement for one, then you need to replace all of them.

Edit:
That's a Fairchild transistor. Part number FQP50N06
60V N-channel Qfet.
http://www.fairchildsemi.com/pf/FQ%2FFQP50N06.html