FEP16BTD would be a good sub.
These are the originals (ebay):
170174790056
Have you checked them? If the amp won't power up, the problem is likely elsewhere. When these fail, the amp draws excessive current.
Post the DC voltage on the pins of the SG352x (3524 or 3525?).
IC#
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:
These are the originals (ebay):
170174790056
Have you checked them? If the amp won't power up, the problem is likely elsewhere. When these fail, the amp draws excessive current.
Post the DC voltage on the pins of the SG352x (3524 or 3525?).
IC#
Pin 1:
Pin 2:
Pin 3:
Pin 4:
Pin 5:
Pin 6:
Pin 7:
Pin 8:
Pin 9:
Pin 10:
Pin 11:
Pin 12:
Pin 13:
Pin 14:
Pin 15:
Pin 16:
Perry gave you the e-mail addy for SoundStream in the first part of the post, they will e-mail it to you most likely. I don't have it in my files, but most probably would not need it since I have worked on a few dozen of those over the years.
Sorry to hear your local shop was not up to snuff, for you.
JandR electronics on ebay repairs these also along with selling all the parts you might need. Jaime is great people, you can't go wrong with him....
Sorry to hear your local shop was not up to snuff, for you.
JandR electronics on ebay repairs these also along with selling all the parts you might need. Jaime is great people, you can't go wrong with him....
Old post but better than starting new. I've got a ref604 that I am scratching my head on. I have one that self destructed. 1 Driver board, a couple of outputs, power supply fets and diodes. I also replaced one 2SA1562 that was blown and the 2n2222.
So I have replaced all the bad stuff yet the amp still draws excessive current. With 12V connected but remote not powered I've got voltage on the neg supply rail ~-7-12V measured at one of the filtering coils.
Here are my measurements once turned on. I had the current limiter turned on so I didn't cook anything.
SG3524
1=1.325
2=2.250
3=0.241
4=.032
5=.032
6=2.870
7=2.065
8=0.061
9=3.69
10=0.035
11=2.052
12=6.68
13=6.68
14=2.113
15=2.058
16=4.47
Pin 1 doesn't seem right but I'm not finding anything. Open to ideas.
Measure the resistance from leg 3 of one of the 2SA1562s to the gate legs of each of the power supply FETs, you should read ~34 ohms for half of the power supply FETs.
Do the same for the other 1562 also.
If you find a gate leg that doesn't read ~34 ohms to one of the 1562s, it either has an open trace or a defective gate resistor.
Do the same for the other 1562 also.
If you find a gate leg that doesn't read ~34 ohms to one of the 1562s, it either has an open trace or a defective gate resistor.
Power supply appears to be ok. With current limiting set to 5A my supply voltage drops to ~7 but I have +/-20V at the rails on a scope. I've double checked the output transistors and they look good. Current sharing resistors measure good too. ??? Everything points to a bad output but I can't seem to locate it they are all testing good with a DMM.
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