I have a Soundstream pca1000d monoblock amp in for repair. It powers up and the protect light goes off after about 5 seconds. the amp seems to be stable, outputs are all sharing the voltage properly. when applying audio there is no output. I replaced 2 swollen capacitors and removed the stand off board or driver board and verified it for bad components. does anyone have a schematic or have seen this issue with this type of amp.
It's too large to upload. Here's a link to the 1500.
http://www.bcae1.com/temp/soundstream - pca-1500d - type 2.pdf
Do you get modulation of the r-r square wave when you drive signal into it?
Is the master/slave switch in the 'master' position?
http://www.bcae1.com/temp/soundstream - pca-1500d - type 2.pdf
Do you get modulation of the r-r square wave when you drive signal into it?
Is the master/slave switch in the 'master' position?
I swapped out the jrc 072d with a tl072 and this had no impact. not sure if I am troubleshooting using this method is correct. that high frequency signal on pin 5 goes away if I set the phase switch to 0 vs 180. if I apply a 100hz signal on the pin 5 of that ic103. it will produce high voltage on speaker output. any ideas?
Start a new thread for the 880.
For the 2000, a defective pot can sometimes cause a crossover circuit to oscillate. The problem may be intermittent so push on various parts of the board and operate all controls through their range while checking the signal on the point that was oscillating before letting it go.
For the 2000, a defective pot can sometimes cause a crossover circuit to oscillate. The problem may be intermittent so push on various parts of the board and operate all controls through their range while checking the signal on the point that was oscillating before letting it go.
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