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Need help with sourcing a resistor for a Peavey XR800F Plus

Mk1Jordan

Jun 7, 2024
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Hi everyone. I picked up an old Peavey XR800F Plus that doesn't work and have stripped it down and found that the resistors have been burnt out. Managed to find a schematic for it but can't seem to make anything of the information that is provided. The key for the parts are as follow...

QTY - PART NAME - VALUE - PART NUMBER - DESCRIPTION AND DEVICE DESIGNATIONS

The part i am looking for is listed as...

16 0.22W5 0.22W5 70241102 .22--5W--5%--WW--AXL

If anyone can help me find the resistors i am looking for it would be more than appreciated.

Thanks for any help.
 

Delta Prime

Jul 29, 2020
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.22--5W--5%--WW--AXL
0.22 Ohm
5 Watt
5%=J
WW=Wire Wound
AXL=Axial
Cement resistor=that's my guess

1717803584922.png



Or aluminum clad
1717803352635.png


Or even ceramic no photo.
Digi-Key,mouser ,element 14.
That is where I source electronic components.
 
Last edited:

Mk1Jordan

Jun 7, 2024
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Thanks for the replies everyone. I've attached the schematic aswell as some pictures of the burnt out resistors to hopefully help identify what they are as they dont look like the ones mentioned by Delta Prime.

Also found another resistor that appears to be burnt out which is listed as this one the schematic if someone could help me understand what i need to get

6 150S 150 70200014 150---1/8w--5%---smt

Thanks again for all the help!
 

Attachments

  • Peavey-XR-696-XR800F-Power-Amp-Schematics.pdf
    1.6 MB · Views: 3
  • IMG_20240608_182831.jpg
    IMG_20240608_182831.jpg
    295 KB · Views: 11
  • IMG_20240608_182838.jpg
    IMG_20240608_182838.jpg
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Delta Prime

Jul 29, 2020
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Definitely old school .Desolder them measure the resistance
You have to clean up that board.
Wear gloves that heatsink compound is toxic to humans.that is no joke!!!
Sorry about the bold. I'm hiking .speech to text stupid phone.
 

Bluejets

Oct 5, 2014
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Same same....they appear to be ballasting resistors for the output transistors to avoid thermal runaway.
I'd be searching for a couple of blown output transistors.
 

Ylli

Jun 19, 2018
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Screenshot 2024-06-09 152613.jpg
When you post excerpts from the parts list, it would help if you would let us know what resistor you are talking about. In this case it could be R130, R140, R230, R240, R270, or R273.

The 0.22 ohm resistors you mentioned could be some or all of these:
Screenshot 2024-06-09 153106.jpg

This appears to be a Class H amplifier. They can be a little more tricky to troubleshoot. I would suggest removing a testing transistors:
Q100, Q101, Q102, Q107, Q108, Q110, Q114, Q115, Q116, Q119, Q120, Q121.
 

Bluejets

Oct 5, 2014
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When you post excerpts from the parts list, it would help if you would let us know what resistor you are talking about.
Actually yes, but in this instance it is clearly visible at being R137.
 

Ylli

Jun 19, 2018
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The first one (without a visible designation) doesn't look too good either.
 
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