Let's Get Technical > Power Amp Tech
My MT200 freaks out
Kim:
--- Quote from: MarshallJMP on February 24, 2017, 06:47:46 AM ---It happends on both channels?
--- End quote ---
Yes about the Volume Decrease and the Zap n Burps.
MarshallJMP:
Well the common factor could be the PSU so I would measure the voltages on the red connector (the big one)
Harley Hexxe:
--- Quote from: rnolan on February 24, 2017, 05:43:15 AM ---Hey Harley, sorry, no idea :dunno: , I've no knowledge of where Kim got it from. Solder joints get old, tired and vibrated, hence my suggestion...
--- End quote ---
That was one of my power amps that I donated to the cause when we were sending Kim the MP-2/MT200 rig back when he was having all the issues with the Classic. It was one of my best sounding ones at the time.
Harley 8)
Kim:
--- Quote from: MarshallJMP on February 24, 2017, 01:53:11 PM ---Well the common factor could be the PSU so I would measure the voltages on the red connector (the big one)
--- End quote ---
K2 and K102? The voltages there at both plugs check out good....but with 78v where it should be 65v.
MarshallJMP:
On the PSU schematics it says 75V, so should be okay.Maybe something in the input section.Maybe one of those 4053 ic's.
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