MTX thunder 81001 board mvp171-c identify 4 burned resistors - diyAudio
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Old 20th September 2010, 12:09 AM   #1
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Default MTX thunder 81001 board mvp171-c identify 4 burned resistors

Everything looks great on this amp, took me a while to notice the bad components. They must have gotten a little hot as some of the color bands are flaked off. If someone could help me to find the value of these = r490, r491, r492, r493 thanks.
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Old 20th September 2010, 01:27 PM   #2
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Where are these resistors?

Last edited by Perry Babin; 20th September 2010 at 01:29 PM.
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Old 20th September 2010, 03:17 PM   #3
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The resistors R490,491,492,493 are all the same They are Brown,black,orange,gold, They are 10K 1 watt resistors.

The resistors connect to the middle leg of the output transistors.
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Old 20th September 2010, 04:12 PM   #4
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Great thanks mike49504, so these would be ok? Digi-Key - 10KW-1-ND (Manufacturer - RSF100JB-10K) One more thing, is it posssible that these could have failed without killing anything else? The rest of the board and components look fine, there was only very slight discoloration on the bottom side of the board under the four resistors, and the owner of it said that it worked still but would go into protect if volume turned up. Just hoping for a quick fix i guess. Once again thanks for identifying those for me, google wasn't getting me anywhere.
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Old 21st September 2010, 02:57 AM   #5
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Always possible.

I would also check the outputs to see if any are shorted or leaking just to be safe.
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