The amp has MTP25N06 for the power supply fets with 47.5 ohm gate resistors
Does anyone know of a good replacement for the fets ?
Does anyone know of a good replacement for the fets ?
The drive circuit is weak. A Z44 may be the best you can use. You'll need to confirm that the FETs don't heat up significantly at idle (at full duty cycle).
The diagram shows C4 as a 2200uf cap .
When I opened the amp up it had a 3300uf cap but someone worked on it before and who knows what all they did .
Wondering should I use the 2200uf cap or the 3300uf cap
When I opened the amp up it had a 3300uf cap but someone worked on it before and who knows what all they did .
Wondering should I use the 2200uf cap or the 3300uf cap
3300 won't be a problem but there are other specs like temperature and voltage that can make a difference.
Replaced the fets gate resistors a few caps cleaned the board up .
As soon as I apply remote voltage the amp blows the 20 amp fuse and the fets get hot within a sec .
Are the fets driven off the 3524 in this amp ?
As soon as I apply remote voltage the amp blows the 20 amp fuse and the fets get hot within a sec .
Are the fets driven off the 3524 in this amp ?
Yes. Are the 150 ohm resistors within tolerance?
Yes, the 3524 drives the FETs, with the help of the 150 ohm resistors.
Yes, the 3524 drives the FETs, with the help of the 150 ohm resistors.
I removed the rectifiers and the power supply has perfect drive signal .
So either the rectifiers are shorted or something in the output section is bad
So either the rectifiers are shorted or something in the output section is bad
You can check the rectifiers.
Have you eliminated the transformer as being intermittently shorted?
You can remove the 3a fuses to eliminate each channel as the possible culprit.
Have you eliminated the transformer as being intermittently shorted?
You can remove the 3a fuses to eliminate each channel as the possible culprit.
I find one of the rectifiers to be shorted .
Now the fun of trying to find one or something I can use for a replacement since this amp uses the doublers
Now the fun of trying to find one or something I can use for a replacement since this amp uses the doublers
I found a rectifier for the amp .
Channels 3/4 work correctly
Channels 1/2 have no output I cleaned the switches and when switching them back and fourth I can hear a low thumb through the test speaker when switching them back and fourth but still no output
Are there muting transistors in this amp or any ideas ?
Channels 3/4 work correctly
Channels 1/2 have no output I cleaned the switches and when switching them back and fourth I can hear a low thumb through the test speaker when switching them back and fourth but still no output
Are there muting transistors in this amp or any ideas ?
I found a shorted output in 1 of the channels after testing and the fuse blew .
Wondering is there a good replacement for the
TIP106 and TIP101 ?
Wondering is there a good replacement for the
TIP106 and TIP101 ?