Soundcraft GIGRAC 1000 power resistors

[diydidi]

I have one of these for repair. The resistors R84 & R85 are broken. They are thin rectangular disc shape resistors. According to the schematic they are 5W 50ohm in value. Can I replace these with normal ceramic resistors of the same value?

[Jazz P Bass]

The resistors R84 & R85 are broken. They are thin rectangular disc shape resistors. According to the schematic they are 5W 50ohm in value.

"Thin. Rectangular. Disc shape."
That does not sound like a resistor.
A thermistor maybe?
Can you post a pic & the schematic.

[g1]

great, the 'bots are brushing up on their Italian?

[Steve Conner]

Just as well we're brushing up on our bot-busting skills!

[derked]

I have the same problem. The parts R84 AND R85 are high power thick film MPC resistors. I have contacted Soundcraft and they have said that them blowing is most likely due to a short in the amp section.

Have you had any joy replacing the resistors?

[diydidi]

I have the same problem. The parts R84 AND R85 are high power thick film MPC resistors. I have contacted Soundcraft and they have said that them blowing is most likely due to a short in the amp section.

Have you had any joy replacing the resistors?

Hi. Just replace with ordinary ceramics. Works fine! Make sure you fix rest of power supply first!

[derked]

Thanks thats good news. Those resistors are tricky to get hold of.

What was caput on your power supply?

[diydidi]

On Mine, just those two resistors, a Mosfet To-220, and a resistor. All on primary side.