memphis 2000 mojo

[timwebb]

ok i got this amp to power up fine.but plays low. i looked at the signal on the output transistors.one side has a clean signal and the other side has a distorted signal.what could cause this.

[Perry Babin]

What was the problem initially?

What work have you done on it?

[timwebb]

the output section was fried.i replaced alot of transistors on the output driver card cause they were shorted.

[Perry Babin]

Post a photo of the distorted waveform.

[timwebb]

could it be a group of transistors?

[Perry Babin]

Where was this signal taken from?

What's the timebase setting?

Can you post a photo of the 'good' signal?

[timwebb]

it was taken from one side of the out put transistors off the tabs.
time/div-1
volt/div-5

[Perry Babin]

Did you check the resistors that are connected between the emitters of the NPN and PNP driver transistors? They're typically between 1 and 4.7 ohms and often open when the amp fails.

[timwebb]

yes i checked them they all read 1.1-1.4 ohms.one channel plays but is low and distorted and the other is dead.

these are the cards i have,what else should i be looking for?

[timwebb]

ok both channels work but still only plays low.it cut out when a bass line hit.