Do you have a pic of the power supply driver board ? Both sides
I powered the amp up and it blew the power supply fets in 1 bank it took the drivers out also . I replaced the drivers but not sure if I put 1 in the wrong spot now the amp draws excessive current
I powered the amp up and it blew the power supply fets in 1 bank it took the drivers out also . I replaced the drivers but not sure if I put 1 in the wrong spot now the amp draws excessive current
I might have problems with both banks .
First pic is of Q1,2,3
2nd pic is of Q4,5,6
3rd pic Q1000,1002,1005
4th pic Q1001,1003,1004
scope set to 5us 5 volts Div
First pic is of Q1,2,3
2nd pic is of Q4,5,6
3rd pic Q1000,1002,1005
4th pic Q1001,1003,1004
scope set to 5us 5 volts Div
Attachments
Ok that issue is fixed .
I still have the 7 k signal on pin 1 of the output board and on then rca ground shields .
I still have the 7 k signal on pin 1 of the output board and on then rca ground shields .
Post the waveform, including the scope settings.
Post a second waveform with a 50Hz waveform. Leave the scope grounded to the shields.
Post a second waveform with a 50Hz waveform. Leave the scope grounded to the shields.
I will post the waveforms . With scope settings .
I believe the issue is on the output board . Maybe 1 of the smd transistors are bad . If I remove the output board the issue goes away and the 7k signal is gone
I believe the issue is on the output board . Maybe 1 of the smd transistors are bad . If I remove the output board the issue goes away and the 7k signal is gone
I’m rebuilding the output driverboard in this amp since I’m almost certain that is the issue . I found 2 transistors that are leaky .
MMBT5088 and 2N700
does anyone know of a good replacement I can use for these transistors ? Mousse and digikey have no stock
MMBT5088 and 2N700
does anyone know of a good replacement I can use for these transistors ? Mousse and digikey have no stock
2N7002?
Did you short the gate-source before checking for d-s leakage?
Newark shows stock on the other transistor.
Did you short the gate-source before checking for d-s leakage?
Newark shows stock on the other transistor.