Amps pilot light doesnt turn in, speaker doesnt work

silentblackhat · 16th March 2006, 08:29 PM

I have a crate 25watt bass guitar amp. I am wondering what is wrong with it or if i can get some direction on what could be wrong so i can try to fix it. Nothing seems to turn on when i press the power button at all. Could it be a fuse? something else? any direction given would be helpful.

anatech · 17th March 2006, 02:38 PM

Hi silentblackhat,

Unplug the amplifier and carry to your bench.

Test #1 - take your ohmmeter across the AC plug and turn the power switch on. Do you have continuity?

Test #2 (if no) - Measure right across the power transformer primary.

-Chris

BobEllis · 17th March 2006, 03:08 PM

Gee, that sounds familiar. My son trash picked a Fender Roc-Pro 1000 with the same symptoms. The transformer primary was open. I had a surplus transformer from www.allelectronics.com that was suitable. Total repair cost $11, time 15 minutes and I didn't need to buy the kid an amp

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16th March 2006, 08:29 PM	#1
silentblackhat diyAudio Member Join Date: Jul 2004 Location: kansas	Amps pilot light doesnt turn in, speaker doesnt work I have a crate 25watt bass guitar amp. I am wondering what is wrong with it or if i can get some direction on what could be wrong so i can try to fix it. Nothing seems to turn on when i press the power button at all. Could it be a fuse? something else? any direction given would be helpful.

17th March 2006, 02:38 PM	#2
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi silentblackhat, Unplug the amplifier and carry to your bench. Test #1 - take your ohmmeter across the AC plug and turn the power switch on. Do you have continuity? Test #2 (if no) - Measure right across the power transformer primary. -Chris

17th March 2006, 03:08 PM	#3
BobEllis diyAudio Member Join Date: Sep 2003 Location: Upstate NY	Gee, that sounds familiar. My son trash picked a Fender Roc-Pro 1000 with the same symptoms. The transformer primary was open. I had a surplus transformer from www.allelectronics.com that was suitable. Total repair cost $11, time 15 minutes and I didn't need to buy the kid an amp