Orion HCCA 250G4 Schematic

turbodood · 14th March 2010, 05:40 PM

I hope this newbie question hasn't already been answered. I have been searching it, but haven't found what I'm looking for. Does anyone know of a source (*.pdf file or otherwise) for a schematic on a Orion HCCA 250 G4 car amp? I have a smoked one and could use some service info on it.
Thanks!

0ldSch00lf00l · 14th March 2010, 08:45 PM

I have a non smoked HCCA 250 G4 that I can use to provide detailed photos of if there are any particular sections of the circuit board that you need a closeup of. Only problem is I have a crazy schedule this week, so it may be a while before I can get to it.

turbodood · 16th March 2010, 12:14 PM

Thanks for the offer. It isn't smoked to the point that I can't read the chips, but something is pulling a load with it powered up and overheating Q37-Q41 on the board. All 4 transistors checked good out of circuit, but get hot pretty fast when I power things up. I have all 20 mosfets out, and all 20 output transistors removed too. (10) 2N6488 and (10) 2N6491's. Fixing this amp is turning into a REAL project to say the least.
BTW, I started with finding 10 smoked NDP7660 and at least half of the 6491's and 6488's cooked real good. It seems to have hurt some other parts that I'm still looking for. A schematic would help a LOT so I could trace out the circuits.
Orion was no help, since I don't really care to become an Orion dealer in St. Louis.

14th March 2010, 05:40 PM	#1
turbodood diyAudio Member Join Date: Mar 2010	Orion HCCA 250G4 Schematic I hope this newbie question hasn't already been answered. I have been searching it, but haven't found what I'm looking for. Does anyone know of a source (*.pdf file or otherwise) for a schematic on a Orion HCCA 250 G4 car amp? I have a smoked one and could use some service info on it. Thanks!

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14th March 2010, 08:45 PM	#2
0ldSch00lf00l diyAudio Member Join Date: Aug 2008 Location: Lafayette, Louisiana	I have a non smoked HCCA 250 G4 that I can use to provide detailed photos of if there are any particular sections of the circuit board that you need a closeup of. Only problem is I have a crazy schedule this week, so it may be a while before I can get to it.

16th March 2010, 12:14 PM	#3
turbodood diyAudio Member Join Date: Mar 2010	Thanks for the offer. It isn't smoked to the point that I can't read the chips, but something is pulling a load with it powered up and overheating Q37-Q41 on the board. All 4 transistors checked good out of circuit, but get hot pretty fast when I power things up. I have all 20 mosfets out, and all 20 output transistors removed too. (10) 2N6488 and (10) 2N6491's. Fixing this amp is turning into a REAL project to say the least. BTW, I started with finding 10 smoked NDP7660 and at least half of the 6491's and 6488's cooked real good. It seems to have hurt some other parts that I'm still looking for. A schematic would help a LOT so I could trace out the circuits. Orion was no help, since I don't really care to become an Orion dealer in St. Louis.

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