Hello All,
I am currently rebuilding a Crown CE2000xt power amp that had the typical catastrophic meltdown that is known to occur with these amps. Basically a whole crap load of components get burnt up due to some high overvoltage failure. After replacing about $100 worth of components I found 6 more that needed replacing for another $15.
But 2 of the components (MBS4993 Silicon Bidirectional Switch Diode Thyristor) I was not able to source new ones. The only thing available was a more robust component with much higher specs all round and that part number is SST131U-600D purchased from Digikey.
I have attached the amp schematic with a red colored marker of the area where the MBS4993 is working in conjunction with another more robust Triac.
My question is ... what exactly is this section of the circuit doing here ? And whether or not the more robust replacement I obtained will do the same job as the original according to each components datasheet specs. I am having a funny feeling that the replacement may not work in this config.
PS>>> After doing another web search for this MBS4993 part, I managed to find a possible source to buy them. I submitted an email for a quote and am waiting to hear back. Apparently there was 8 suppliers that may or may not have them in stock. So if I'M SOL to get these exact replacements, then I will be needing someones advice here on if the more robust SST131U-600 will function properly.
I hope the diagram is readable ... I had to reduce the file size considerably ... for some reason I kept getting errors trying attach the upload. File size restrictions ???
Thanks in advance,
Journey
I am currently rebuilding a Crown CE2000xt power amp that had the typical catastrophic meltdown that is known to occur with these amps. Basically a whole crap load of components get burnt up due to some high overvoltage failure. After replacing about $100 worth of components I found 6 more that needed replacing for another $15.
But 2 of the components (MBS4993 Silicon Bidirectional Switch Diode Thyristor) I was not able to source new ones. The only thing available was a more robust component with much higher specs all round and that part number is SST131U-600D purchased from Digikey.
I have attached the amp schematic with a red colored marker of the area where the MBS4993 is working in conjunction with another more robust Triac.
My question is ... what exactly is this section of the circuit doing here ? And whether or not the more robust replacement I obtained will do the same job as the original according to each components datasheet specs. I am having a funny feeling that the replacement may not work in this config.
PS>>> After doing another web search for this MBS4993 part, I managed to find a possible source to buy them. I submitted an email for a quote and am waiting to hear back. Apparently there was 8 suppliers that may or may not have them in stock. So if I'M SOL to get these exact replacements, then I will be needing someones advice here on if the more robust SST131U-600 will function properly.
I hope the diagram is readable ... I had to reduce the file size considerably ... for some reason I kept getting errors trying attach the upload. File size restrictions ???
Thanks in advance,
Journey
