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-   -   Repair Help on Orion 2500d (http://www.diyaudio.com/forums/car-audio/158336-repair-help-orion-2500d.html)

wccoug21 10th January 2010 05:54 AM

Repair Help on Orion 2500d
 
Hello, I'm working on an Orion 2500d that I need a nudge in the right direction on.

So the power light doesnt come on when i hook it up.

It idles around 5 amps and makes the little click noise when its powered up.

All the power and output transistors seem to be fine.

No burn marks on the board or anything else that looks out of the ordinary.

I did however notice that the 2 matching vertical driver boards heat up significantly while idling.

Any tips on this type of repair?

Perry Babin 10th January 2010 08:05 AM

Do you have the master/slave switch set to master?

Have you tried running all controls/switches through their entire range?

Do you have both positive and negative rail voltage on the third leg of the output transistors?

Since the driver boards are heating up (some heating is normal), you probably have rail voltage but you need to check if none of the previous suggestions have helped.

Do you have both positive and negative regulated voltage on the op-amps?

spooney 10th January 2010 03:05 PM

Glad to see somebody else from caraudio.com over here. This is the best place to be for amp repair help.

wccoug21 10th January 2010 07:00 PM

Do you have the master/slave switch set to master?
Yes

Have you tried running all controls/switches through their entire range?
Yes

Do you have both positive and negative rail voltage on the third leg of the output transistors?
No, I'm not getting any voltage from the output transisters 3rd leg

Since the driver boards are heating up (some heating is normal), you probably have rail voltage but you need to check if none of the previous suggestions have helped.
I actually am only getting .1 volts on the rails on the audio side.

Do you have both positive and negative regulated voltage on the op-amps?
Yes I have + and - 12 volts on the op-amps

Perry Babin 10th January 2010 07:38 PM

What DC voltage do you have on the power supply FETs?

Q711
Leg 1:
Leg 2:
Leg 3:

Q601
Leg 1:
Leg 2:
Leg 3:

Q606
Leg 1:
Leg 2:
Leg 3:

Q701
Leg 1:
Leg 2:
Leg 3:

wccoug21 10th January 2010 08:04 PM

What DC voltage do you have on the power supply FETs?

Q711
Leg 1: 5
Leg 2: 13
Leg 3: 0

Q601
Leg 1: 5
Leg 2: 13
Leg 3: 0

Q606
Leg 1: 5
Leg 2: 13
Leg 3: 0

Q701
Leg 1: 5
Leg 2: 13
Leg 3: 0

Perry Babin 10th January 2010 08:16 PM

What DC voltage do you have on the center legs of D631/632?

What DC voltage do you have on the outside legs of D731/732?

wccoug21 10th January 2010 08:42 PM

Quote:

Originally Posted by Perry Babin (Post 2042557)
What DC voltage do you have on the center legs of D631/632?

What DC voltage do you have on the outside legs of D731/732?

There is no voltage on any of those combinations.

Perry Babin 10th January 2010 09:04 PM

Are the power supply FETs in the circuit?

wccoug21 10th January 2010 09:11 PM

Yes. I have yet to take anything out of the circuit.


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