Need help with sourcing a resistor for a Peavey XR800F Plus

[Mk1Jordan]

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.

 

[Bluejets]

old Peavey XR800F Plus

Whatever that is .......... ??? if you have the schematic, post it here.

Sounds like 5w power resistor 0.22 ohm.

 

[Delta Prime]

.22--5W--5%--WW--AXL

0.22 Ohm
5 Watt
5%=J
WW=Wire Wound
AXL=Axial
Cement resistor=that's my guess





Or aluminum clad



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

 

[Mk1Jordan]

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!

 

[Delta Prime]

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]

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]

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:


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]

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]

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

 

[Bluejets]

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

They're all the same value.