Hello, ive got a non working amp. After checking, all parts are ok. When power up, the amp is going in Protect, switching on, Protect again and so on.
Found, that one Audiobank of Fets is getting no signal at the Gate.
The gate is driven by a IRS20957S. (IC416). Each Channel has his own IRS.
Found, that all other three IRS want to power up, and starting producing Signal except IC416. According Datasheet, at pin 3 should be a PWM Signal. I got this signal during power on time shortly on all three working IC´s, except the IC 416. So i think something must produce this PWM Signal and it should connected to this Pin3. Maybe somebody can assist. Iam not sure if this IRS is broken, or if only the PWM Signal is missing and thats why the amp is going into protect.
Found, that one Audiobank of Fets is getting no signal at the Gate.
The gate is driven by a IRS20957S. (IC416). Each Channel has his own IRS.
Found, that all other three IRS want to power up, and starting producing Signal except IC416. According Datasheet, at pin 3 should be a PWM Signal. I got this signal during power on time shortly on all three working IC´s, except the IC 416. So i think something must produce this PWM Signal and it should connected to this Pin3. Maybe somebody can assist. Iam not sure if this IRS is broken, or if only the PWM Signal is missing and thats why the amp is going into protect.
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