Alpine MRP-M350

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tn350

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Joined 2011
#1
Hey guys, so I have an Alpine MRP-M350 amp that has just recently decided to stop working. The blue led light still comes on when the amp is on, and I have a multimeter and tested the voltage input to the amp and it is 14V. But I am getting absolutely nothing on the output terminals. All fuses are good and there is no evidence of the amp being fried (see pic below).

I took the amp to a repair shop and they said that the amp wasn't drawing any current. Does anyone know what could be wrong with it? I'd hate to trash this thing, its a great amp!

DSC01824.jpg
 
#2
What is the DC voltage on the legs of Q601, Q603, Q604 and Q606? They should all be about the same. If they are, you only need to post the voltage for one of them. Place the black meter probe on the amplifier's ground terminal. Place the red meter probe on the point where you need to measure the voltage.
 
#6
That's it. Post the DC voltage on all 16 pins. Place the black meter probe on the amplifier's ground terminal. Place the red meter probe on the point where you need to measure the voltage.

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:
 

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#7
Ok here are the DC voltages at the upc494:

Pin 1: 0.0264 V
Pin 2: 4.51 V
Pin 3: 3.64 V
Pin 4: 0 V
Pin 5: 0 V
Pin 6: 0 V
Pin 7: 0 V
Pin 8: 0.55V
Pin 9: 0 V
Pin 10: 0 V
Pin 11: 0.45 V
Pin 12: 0.45 V
Pin 13: 0 V
Pin 14: 0 V
Pin 15: 0 V
Pin 16: 0 V
 
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