Hello Folks,
I found D103 (D104 in the schemo) to be shorted. SMPS just pulsed and wouldn't start thanx to protection. The only diode that I and the tech at Mouser could find that was close to the original CR2010 was the FR207G-B.
Well, the amp came back with the same D103 shorted. I'm not sure if it is because of the longer Reverse switching time of 500ns vs the 100ns of the CR2010. I will order more of the FR207G-B and make certain the power tubes, albeit new, are either shorting or if there's some other issue with the amp.
All the caps in the SMPS check good on the Sencore LC103 and none are bulged.
I'll chime back in when I have a conclusion.
glen
I found D103 (D104 in the schemo) to be shorted. SMPS just pulsed and wouldn't start thanx to protection. The only diode that I and the tech at Mouser could find that was close to the original CR2010 was the FR207G-B.
Well, the amp came back with the same D103 shorted. I'm not sure if it is because of the longer Reverse switching time of 500ns vs the 100ns of the CR2010. I will order more of the FR207G-B and make certain the power tubes, albeit new, are either shorting or if there's some other issue with the amp.
All the caps in the SMPS check good on the Sencore LC103 and none are bulged.
I'll chime back in when I have a conclusion.
glen
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