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Old 29th August 2008, 08:40 PM   #1
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Location: Lafayette, Louisiana
Default Orion 250 SX - Bad resistor or not?

I purchased this "working" Orion 250 SX off of Ebay, but I have yet to install it in my car. I was wondering if these resistors looked bad to you?

This is the one on the right side of the board:
Click the image to open in full size.


This is the one on the left side of the board:
Click the image to open in full size.

According to my POS Radio Shack meter, each one reads at 8.7 ohms. Regardless, do you think I am overly paranoid and this amp is good to go or should I schedule a trip to dB-r?
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Old 29th August 2008, 09:56 PM   #2
shagone is offline shagone  United States
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firstly i would find out what the original value should be and i would change them both for sure.

i'm sure they must be at least out of tolerance and ready to open up any day now, plus the solder joits are bad from the heat.

you should also find out what was stressing the resistors so much. there could be other component that are out of spec.
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Old 29th August 2008, 10:28 PM   #3
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I would be willing to bet that the person I purchased it from bridged it too low OR clipped the heck out of the amp by using the EQ. Back in the day I saw way too many people try to run those SX series amps like they were the HCCA line.

I guess I will contact dB-r and arrange to send it off.
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Old 29th August 2008, 11:31 PM   #4
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Oh well, looks like I will be sending it off for repair.
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Old 30th August 2008, 01:31 AM   #5
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It is not uncommon to have a resistor run a little hotter than it should. Have you at least put an ohm meter across it and see what it reads?
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Old 30th August 2008, 01:49 AM   #6
ppia600 is offline ppia600  United States
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They may be ten ohm, look at the matching ones near the other transistors, there may be more than two. I also believe it could be from running too low of a load.
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Old 30th August 2008, 04:19 AM   #7
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I have been in contact with Chris at dB-r and will send him the amp as soon as I can.
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Old 30th August 2008, 11:29 AM   #8
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Have you at least tried the amp to see if it works?
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Old 30th August 2008, 01:07 PM   #9
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Quote:
Originally posted by I Am An Idiot
Have you at least tried the amp to see if it works?
I have not tried it yet because I am too much of a chicken. I figured I would look into getting the potential problem fixed prior to installing the amp.
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Old 30th August 2008, 03:18 PM   #10
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If you are near the capitol city I will put it on the bench to tell you if it works. It will take less than 5 minutes.
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