Orion 250sx pop-top
OK, here is the story, amp board looks to be in great shape, at first it was blowing fuses, but I noticed some errant wire clippings must have made there way inside, so I pulled the board and dusted it off with a clean paint brush.
Pulled bypass cards, and installed known good ones.
Now it does not pop the fuses, but has a hum coming out of it with no speakers hooked up, and with speakers it amplifies the hum/hiss.
Youtube> https://youtu.be/0hLxhjPWKco
OK, here is the story, amp board looks to be in great shape, at first it was blowing fuses, but I noticed some errant wire clippings must have made there way inside, so I pulled the board and dusted it off with a clean paint brush.
Pulled bypass cards, and installed known good ones.
Now it does not pop the fuses, but has a hum coming out of it with no speakers hooked up, and with speakers it amplifies the hum/hiss.
Youtube> https://youtu.be/0hLxhjPWKco
Will it pass audio?
With no RCAs plugged in, what's the resistance from the input RCA shields to the non-bridging speaker terminals?
With no RCAs plugged in, what's the resistance from the input RCA shields to the non-bridging speaker terminals?
Yes with no RCA's plugged in, it pass that same noise through at an amplified state, I will check on the resistance on that it will be a bit, then I will let you know ohm's.
My meter is not here (Office) but tomorrow, I will bring the fluke; it can measure capacitance too.
I will check on that rca music, when I get it all in one place, again (tomorrow).
I will check on that rca music, when I get it all in one place, again (tomorrow).
https://www.youtube.com/watch?v=jMFQ7NfpZcU
Sorry for the lag, I have not had a chance to re-test for sound.
Also in this video, it had no jumpers on the pins or cards.
Sorry for the lag, I have not had a chance to re-test for sound.
Also in this video, it had no jumpers on the pins or cards.
I did. it was bouncing around, from the outside jacket of the female RCA to the two middle pins (not bridged), one at a time.
For virtually all of the Orion amps, the RCA shield is directly connected to the secondary center tap which is directly connected to the non-bridging speaker terminals. You appear to have an open ground.
What's the resistance from the non-bridging terminals to the main B+ terminal on the amp?
What's the resistance from the non-bridging terminals to the main B+ terminal on the amp?
So just to clarify , the rca shield is the out side of the barrel. I know this is stupid I just want to make sure I am on the same page with you.
And the secondary center tap, must be a leg running inside the circuit board?
I will be out for a few days (of the office), but when I can get back, I will be back on this.
I also figure I should test continuity from the rca connection at the board back to both of the afore-mentioned points as the jacks so could have a weak joint ( just a thought)
And I will have an answer to your last question.
And the secondary center tap, must be a leg running inside the circuit board?
I will be out for a few days (of the office), but when I can get back, I will be back on this.
I also figure I should test continuity from the rca connection at the board back to both of the afore-mentioned points as the jacks so could have a weak joint ( just a thought)
And I will have an answer to your last question.
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