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Old 1st December 2012, 10:26 PM   #11
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Yes. There are some amps that use all N-channel but an all P-channel would be extremely rare. I'm not saying that it's not possible, just unlikely. That's why I wanted you to check all 8 to make absolutely sure that all were the same.
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Old 1st December 2012, 10:42 PM   #12
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After verifying the Chipsets you was right sorry about that 4 of them are (SMW45N10) Chips Great so now i need to match 4 of those and 4 of the (SMW20P10) Chips to a equal value any suggestions reason im assuming there all shot is cause im seeing quite a few resistors in line with each transititor that look internally burned (brown on the inside coating of the resistor color codes those are still visible tho i plan on swapping all those out as well which those all have the same value the ones that are burned it looks like strange only those burned for each chip).
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Old 1st December 2012, 10:56 PM   #13
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My intentions are to swap out all the Output transistors 2 types 8 chips total and also swap out the 0490-0210 chips for the power supply which there is 8 of those and swap out the the resistors which appear blown and hopefully i have a new amp but theres 3 types of transistors i need that would need to be cross referenced and all be balanced for the values of the amp any suggestions?
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Old 1st December 2012, 11:04 PM   #14
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Can you post clear photos of the burned resistors?
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Old 1st December 2012, 11:14 PM   #15
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I dont have acces to a good camera right now theres brownish color underneath the blue film there not black and the values are still visible but theres like 4 areas and there all inline with the transistors i might be able to capture them with my phone but i can promise how clear it would be i could capture some of the black spots on the amp as well for you tho so you can see what im working with it appears someone heated this thing up pretty bad i recieved it for parts which i decided i wanted to revive it if i could for 100$ cause i have a Cobalt 230 Amp as well just needs some work done to the right Channel im thinking just a transistor on that one as well
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Old 1st December 2012, 11:39 PM   #16
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If you need a camera for this type of work, the lowly Nikon Coolpix 2200 is a good choice (samples on the basic repair page). There are at least 2 on ebay right now. Both are less than $20 including shipping.
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Old 1st December 2012, 11:56 PM   #17
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Heres a photo of the resistors hopefully its clear enough for you
Attached Images
File Type: jpg IMG_0444.jpg (972.0 KB, 26 views)
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Old 2nd December 2012, 12:06 AM   #18
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Thanks for the info i may need one of those by the time on done i have 6 other amps i need to repair with bad transistors :-)
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Old 2nd December 2012, 12:14 AM   #19
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I don't think that those indicate any problems. A lot of Orion amps have resistors that become discolored like that. If they're within tolerance, there's no need to replace them.

Did any of the 45N10 transistors fail?
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Old 2nd December 2012, 12:19 AM   #20
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I just finished up running a ohm test on all of the chips including the power supply chips my ranges were for power 192-199 ohms and the channel transititors leveled out at around 227 ohm and one of the chips in the corner the SMW20P10 is beeping on my meter when i run a ohm/diode check arcross the outer legs so im assuming the ones shorting all the others had ohms and did not beep
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