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JL Audio e6450 *1st time repair*
JL Audio e6450 *1st time repair*
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Old 14th June 2012, 03:29 AM   #1
cdavis is offline cdavis
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Join Date: Jun 2012
Default JL Audio e6450 *1st time repair*

Hey guys- Long time reader first time writer-

I'll keep it short and sweet. I bought an amplifier on CL and it was in protect mode when I brought it home. No shocker there

I got it out of protect mode by doing a little research here and locating a shorted output transistor, but I'm having trouble picking a suitable replacement.

It's an IRF540 and it reads like this:

IRF540
I*R 347k
EF 46

Any advice or a push in the right direction would be greatly appreciated
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Old 14th June 2012, 05:38 AM   #2
nonprof is offline nonprof
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Join Date: Jun 2011
Quote:
Originally Posted by cdavis View Post
Hey guys- Long time reader first time writer-

I'll keep it short and sweet. I bought an amplifier on CL and it was in protect mode when I brought it home. No shocker there

I got it out of protect mode by doing a little research here and locating a shorted output transistor, but I'm having trouble picking a suitable replacement.

It's an IRF540 and it reads like this:

IRF540
I*R 347k
EF 46

Any advice or a push in the right direction would be greatly appreciated
IRF540 is the part number, this is your commercial identification. Use this to buy replacement.

If you are specific to brand name, read the next lines.

I*R 347K is the brand name (I*R= international rectifier company) other numbers maybe the company unique identifier.
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Old 14th June 2012, 02:24 PM   #3
cdavis is offline cdavis
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Join Date: Jun 2012
Okay, I went ahead and ordered these after a little more research:
IRF540PBF Vishay/Siliconix | Mouser
It looks like they're identical to the specs of the IRF540, excepting that they are certified lead free. (They also cost about half as much)
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Old 17th June 2012, 01:17 AM   #4
cdavis is offline cdavis
diyAudio Member
 
Join Date: Jun 2012
Looks like replacing that transistor did the trick. I also gave it a new change of thermal grease, chassis wide so hopefully it lasts. Running it on the bench while I find some drivers for it to run
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