Repair Help on Orion 2500d

wccoug21 · 10th January 2010, 05:54 AM

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

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.

10th January 2010, 05:54 AM	#1
wccoug21 diyAudio Member Join Date: Sep 2009	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?

10th January 2010, 08:05 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	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? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

10th January 2010, 07:38 PM	#5
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	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: __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

10th January 2010, 08:16 PM	#7
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	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? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

10th January 2010, 09:04 PM	#9
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Are the power supply FETs in the circuit? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links


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10th January 2010, 03:05 PM	#3
spooney diyAudio Member Join Date: Dec 2006	Glad to see somebody else from caraudio.com over here. This is the best place to be for amp repair help.

10th January 2010, 07:00 PM	#4
wccoug21 diyAudio Member Join Date: Sep 2009	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

10th January 2010, 08:04 PM	#6
wccoug21 diyAudio Member Join Date: Sep 2009	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

10th January 2010, 09:11 PM	#10
wccoug21 diyAudio Member Join Date: Sep 2009	Yes. I have yet to take anything out of the circuit.

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