The driver ICs sometimes fail. You need to check the resistance across the high and low side driver sections of the IC to see if you read any low resistance between the 3 pins of either section.
Replaced the driver IC --IR2110
Amp is still in protection mode if i pull the driverboard the amp will power up normal
Amp is still in protection mode if i pull the driverboard the amp will power up normal
Power it up with the driver board in place and look at the signal on the small output filter capacitor. Is there any significant DC there when it tries to power up?
Remove the driver board and power it up. With the black probe on the amp ground, measure the DC voltage on the gate leg (not on the resistor) of every power supply FET. Do you get essentially the same voltage on all of them?
Do you have approximately ±15v on pins 2 and 3 of the connector for the driver board. Note that this is the connector nearest the pot. You'll need to insert a resistor leg or something similar into the socket to measure it since the amp won't remain on with the driver board in place.
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Is there a way to defeat the protection on this amp so i can get the voltages off the other IC's on the driverboard to see if one is defective?
Perry,
If i make a solder bridge between pins 3 and 4 (LM393) on the power supply driverboard will this defeat the protection in the amp so i can trouble shoot this?
If i make a solder bridge between pins 3 and 4 (LM393) on the power supply driverboard will this defeat the protection in the amp so i can trouble shoot this?
Ok I pulled all the outputs and amp is still in protection mode..
If i pull the Audio driverboard amp will power up..
So Wondering do you think the problem is most likely the audio driverboard?
If i pull the Audio driverboard amp will power up..
So Wondering do you think the problem is most likely the audio driverboard?
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