Power Acoustik resistor question

[xpcrepair]

I have a Power Acoustik Sappire sp2x 1600. I found 3 blown 100 ohm resistors. What watt resistors do I need? thanks

 

[Perry Babin]

These are likely the gate resistors for the power supply FETs. Post a photo of the entire board and another one of the area where the resistors are located.

 

[xpcrepair]

Here are some pics. They are at R536-R537-R538.

 

[Perry Babin]

That would mean that those 3 FETs have failed and likely the other 3 in that power supply.

Both power supplies commonly fail but if this amp has separate fuses for each supply, the other supply may have survived. It's also possible that the output transistors have failed (causing the supply to fail.

The resistors are likely 100 ohms. They will be the same as the ones connected to the gate legs of the rest of the power supply FETs.

 

[xpcrepair]

OK. Thanks. I will replace the FET's as well.

 

[xpcrepair]

The amp has 2 fuses.

 

[xpcrepair]

I figured out they are 1/4 watt. Thanks Perry

 

[Perry Babin]

Sorry for misreading. You're correct.