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Post subject: FENDER SUPERSONIC 60 NO POWER AND PILOT LIGHT ISSUE!! HELP!
Posted: Sun Jun 09, 2013 9:02 pm
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please help me any one answer this issue on my fender supersonic 60 combo. a couple of days ago i was playing normally in my amp next day i turn it on and noticed the pilot light wont light up and also no power in any of the tubes coming. it all seemed like a fuse issue, so i ordered some new fuses with right specs and everything and replaced the fuse but still no power in the amp. so i guess it wasnt a fuse issue. one curious thing is that the channel leds do light(vibrolux/bassman and burn channel LEDs) they seem to work fine but still no sound coming from the amp. anyone can help me please. i feel really bad since its a expensive amp and now i cant use it anymore...... :(


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Post subject: Re: FENDER SUPERSONIC 60 NO POWER AND PILOT LIGHT ISSUE!! HE
Posted: Sun Jun 09, 2013 9:39 pm
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Rock Star
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Location: Natural Bridge, Virginia
You will get more help posting in the Modern Amps forum:

viewforum.php?f=13

By the way, there are two fuses in the amp.

http://support.fender.com/schematics/gu ... _Rev-A.pdf

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Post subject: Re: FENDER SUPERSONIC 60 NO POWER AND PILOT LIGHT ISSUE!! HE
Posted: Mon Jun 10, 2013 7:10 am
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I cant find second fuse in the schematics. where is it?? thanks


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Post subject: Re: FENDER SUPERSONIC 60 NO POWER AND PILOT LIGHT ISSUE!! HE
Posted: Mon Jun 10, 2013 9:18 am
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Location: Natural Bridge, Virginia
Page 2, heater supply.

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Post subject: Re: FENDER SUPERSONIC 60 NO POWER AND PILOT LIGHT ISSUE!! HE
Posted: Mon Jun 10, 2013 9:35 am
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HT fuses can blow if the bias is set wrong and the output tubes conduct too much current when you flick the standby, heater fuses will sometimes blow when you turn the amp on and the inrush current is too high.

Just as a general rule when a fuse blows, don't keep replacing the fuse and seeing if the amp comes back to life. The fuse is there to protect you and your amp if it develops a fault. While fuses will sometimes blow with no fault present, if it happens on a regular basis then you need to get the amp serviced.

And don't ever be tempted to bypass the fuse or wire past it!

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Post subject: Re: FENDER SUPERSONIC 60 NO POWER AND PILOT LIGHT ISSUE!! HE
Posted: Mon Jun 10, 2013 1:37 pm
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HI, thank you for the advise. I replaced the second fuse and now my amp works. I guess i set the bias way too hot. Im checking that out now. thanks.


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Post subject: Re: FENDER SUPERSONIC 60 NO POWER AND PILOT LIGHT ISSUE!! HE
Posted: Mon Jun 10, 2013 2:56 pm
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Rock Star
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Location: Natural Bridge, Virginia
The heater circuit has nothing to do with the bias. They are separate supplies.

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