Orion HCCA 10002

[imraneesa]

Please check the pictures of waveform at the outer pin and center pin of main rectifiers. Why is there plenty ringing and center pin also has square wave with some ringing. What could be the fault. I seeing same ringing on output waveform also.

 

[imraneesa]

Here is the picture of the amp.

 

[Perry Babin]

Do you have the scope probe ground connected to the secondary center-tap/ground?

 

[imraneesa]

No I am using primary ground.

 

[Perry Babin]

Try the secondary ground.

 

[imraneesa]

I am confused with secondary ground in this. Primary ground to audio rca shield has 47ohms.
Nothing looking like center tap in the back of board. This amp is having two transformers.

 

[Perry Babin]

Which terminals go to the rectifiers?

47 ohms primary ground to shield ground with nothing plugged into the RCA jacks?

 

[imraneesa]

Attaching picture showing terminals connected to rectifiers. Yes with nothing connected it has 47 ohms between rca shield and primary ground.

 

[Perry Babin]

For the top rectifier, the output (center terminal) goes to a rail cap. The other terminal of that cap should be the secondary ground. Confirm that it connects to the non-bridging speaker terminals.

With your scope, confirm that there is no signal/waveform/voltage on those terminal (other than noise).

 

[imraneesa]

The two output speaker terminals are directly connected to the two output inductor coils. No ground in speaker terminals all terminals will have audio out.

 

[Perry Babin]

Doesn't the amp have 4 total speaker terminals?

 

[imraneesa]

Yes two of each are linked together.

 

[Perry Babin]

Those are the non-bridging speaker terminals. They don't connect to the output inductors, do they?

 

[imraneesa]

Please check the image this is how they are connected to two coils.

 

[Perry Babin]

It's not like the following amp?
https://www.onlinecarstereo.com/CarAudio/p_21138_Orion_HCCA-10002.aspx

2 channel amp?

 

[imraneesa]

Oh I am sorry. It is HCCA 25001 is the model. I got two amps and my mind was on different name. I am very sorry.

 

[Perry Babin]

Does this amp use ± rails or only positive rails?

 

[imraneesa]

both + and - rails

 

[Perry Babin]

From post 9:
For the top rectifier, the output (center terminal) goes to a rail cap.

Is that the positive or negative terminal of that rail capacitor?

 

[imraneesa]

That is negative terminal of capacitor. Other rectifier middle is connected to positive of the same capacitor.