Question about Boss IQ 1080.2 Car Audio Amplifier

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On power up.......protect light comes on

Boss gt 1080 ....anybody have a schematic???? we need to identify 2 burned resistors on power input side of board and being an amatuer......a schematic would be invaluble to me while trouble shooting output side of amp. Thanks

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What are the resistors connected to? mosfets?if so you need to identify which pin gate or source,these amps have dual so the other side would be the same.

Posted on Aug 09, 2007

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Posted on Jan 02, 2017

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See page 2-9
and D474 is a zener diode part no. MTZ12JC see page 2-8.

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Hi Dave,

Schematics are tough to come by - but - you may find someone with your model that can help you out in the "Phoenix Gold Phorum" Joining is free - then ask your question and wait for a reply.

Good luck!

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Hey boss. Just follow this guide and replace with a resistor that matches the value and tolerance. You have a 5 Band resistor, follow the guild and you should be good. Click here for a chart to help you identify the values.

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Hi wrightjc2,
Most common burned resistor are those with low resistance because it acts like a fuse to avoid further damaged to some parts if shorts,overload happened. But still best to have a schematic diagram to identify the burned one. If you haven't a schematic you may get the resistance of the resistor, measure it to the middle where the burned cut out, add the resistance from one half side to other half side. You may now have an Idea what may be the value of the burned resistor.
Hope I helped you.
Have a nice day!
Thanks for using Fixya.

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KLH ASW10-120B subwoofer


I realize that this is an old problem, but folks are still finding it on searches, so here goes.

Here are the two pages of schematics from KLH. I wrote to their tech department and explicitly asked for permission to share them here.

Here's the lower board, which has the power supply:
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Here's the upper board:

KLH ASW 10-120 subwoofer schematic - upper board


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