Do you have any MMBTA56 drivers that you can install in place of the PNP drivers?
To clarify, the driver board drives one power supply FETs directly. The output of the driver board that drives that power supply drives the bases of the drivers on the main board. The drivers on the main board drive the second power supply FETs in emitter-follower pairs.
To clarify, the driver board drives one power supply FETs directly. The output of the driver board that drives that power supply drives the bases of the drivers on the main board. The drivers on the main board drive the second power supply FETs in emitter-follower pairs.
After changing pnp. Current draw reduced little bit and is 6amps and mosfets with 60.4ohms heating more than mosfets with 47.5ohms. Remember we had changed 3 resistors to 47.5ohms.
I changed the resistors amp is pulling now 4.5amps. Still heating mosfets. I have IRFP064N.
If I remove this bank will the amp produce output? I am not seeing any output wave at all.
If I remove this bank will the amp produce output? I am not seeing any output wave at all.
I never used the HUF75344 in these amps. I always used the IRFP064N. If all else fails, try those in that supply.
You might try desoldering and lifting the center leg of the rectifiers for T1 to see if something strange is loading the supply. I think it's the drive but I don't know for certain.
The T1000 supplies the low-voltage. T1 is only for additional rail supply so the amp should work normally if T1's supply isn't functioning.
You might try desoldering and lifting the center leg of the rectifiers for T1 to see if something strange is loading the supply. I think it's the drive but I don't know for certain.
The T1000 supplies the low-voltage. T1 is only for additional rail supply so the amp should work normally if T1's supply isn't functioning.
After removing mosfets belonging to T1 amp came on but no output. There is no voltage on outputs showing 10v on all the outputs all the pins.
All outputs are IRFP3415.
All outputs are IRFP3415.