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Old 1st April 2005, 07:53 AM   #1
zfactor is offline zfactor  United States
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Default class d lightning audio (rockford) 1000 watt help

hello all new to your forums. i have here a 1000watt 1ohm class d lightning audio. i have experience with other electronics prior but never worked on class d amps before. i have irfz44n hexfet mosfets burned out (5 of them) customer let the amp get wet!! and a voltage reg that is numbered
i can seen to find these or get a good cross on these anywhere any ideas??
also anything else to be concerned with in repairing a class d amp??
the resistors before the mosfets also went with them. those should be easy enough to find though. thanks hope someone can help
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Old 5th April 2005, 08:42 PM   #2
FrankH is offline FrankH  Netherlands
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Default Lightning

Hi ZFactor,

5 HEXFETS? Hm Strange. 4 or 8 might be more logical. But that's the easy part. Test and replace if broken.

Is there some sort of (IC Chip)driver, driving the FET's? If there is, that might be broken too.

Than the reg: is it in the control part or the powerpart of the amp?
What are the surrounding values of the (electrolytic)caps connected to the reg?

Try to find out the pin config of the IRFZ and see in what line the broken Resistors are. Tells you a little more about the rest of the circuit.

Better to find some schematics and post them.

Good luck, Frank
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Old 5th April 2005, 08:57 PM   #3
IVX is offline IVX  Russian Federation
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if A1266 in the to-92 case, then it's 2sa1266 P-BJT 50V/.1A
Best regards,
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