i have a orion 225r wont power up when i hook B+ and Negative i have 14.5 volts but when hook up remote wire it drops in half any ideas would be helpful
Thanks
Thanks
It's drawing excessive current or the power supply doesn't produce enough current to power the amplifier. What are you using for a power supply?
its and old vista IV 12 volt 4amp i think but it will power up other orion 225 amps aslong as u dont turn the gain to high at the B+ and - termainal has 14.5 volts till u hook up remote then it drops to 7.04
Thanks
Thanks
With the amp on (including remote), measure the DC voltage across each individual emitter resistor. Does any resistor read more than 0.000v DC?
hi the big green resistors read -1.30 on some and some read 1.30 the blue ones read o.oo by speaker termanals one by transformer reads 7.0 on both ends the other two read 0.00
Thanks Perry
Thanks Perry
If the ones that read ±1.3 are directly in front of the output transistors, the outputs or the drivers are likely defective. Check the output transistors to see if any are shorted.
on the 2n6488 i get 449 with black (c) and red on ( b) then i get 071 with black on (E) and red on (b)
on 2n6491 494 with black on (B) and red on (c) then 071 with black on (B) red on (E) thats with chips still in board
im sorry but new to this stuff
Thanks Perry
on 2n6491 494 with black on (B) and red on (c) then 071 with black on (B) red on (E) thats with chips still in board
im sorry but new to this stuff
Thanks Perry
hi on the 2n6488 i get 940 with no power hooked up
on the 2n6491 i get 930 with no power hooked up
thanks
on the 2n6491 i get 930 with no power hooked up
thanks
Post a photo with arrows pointing to the resistors that had ±1.3v.
Are you sure that it was 1.3v and not 1.3mv?
Are you sure that it was 1.3v and not 1.3mv?
typically Orions had no thermal protection internally, so if speaker wires touched while the amp was powered, the amp would blow out the finals, and you'd end up replacing most of the output FETs. I used to service and sell Orion products in the early 90s (when the 225 HCCA was sold in it's 1st through 3rd generation incarnations) and saw a lot of blown ones just like this with the same problem. I even had a wire come loose from a spring compression terminal on a sub box once and kill my own personal 280GX this way. Check those output FETs to see if they're shot. I'm betting they are. They'll be the ones attached to the long metal rails (bars) along the side of the amp, connected to the heatsink fins of the casing.
Hey Perry, glad to see you here, too. I just started peeking in.
Hey Perry, glad to see you here, too. I just started peeking in.
An externally hosted image should be here but it was not working when we last tested it.
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