hi guys, a friend brought a 950 to me yesterday that he wants me to try to fix for him, it looks like it has simply blown a channel but I intend to check the voltages on the power board as well to make sure those are ok, what mainly wondering about though, do you see it the way i see it? ive included some pictures..
it looks like (according to the service manual, 150 ohm 1/2 watt) resistors burned when the outputs shorted.
I took the shorted outputs out and tested them, they are indeed goners, i thought the thing MIGHT come out of protection with the outputs removed but it didnt, no relay click. ..i didnt think the resistors alone would prevent it from coming out of protection, that should be an open circuit at this point shouldnt it...
anyway, im gonna eat breakfast and then start checking voltages and what not. ill also measure the nearby resistors that have soot/flame marks on them, and those regulators and diodes.
also attached is a picture of the bottom side, which visually looks ok, nothing stood out as being burned.
it looks like (according to the service manual, 150 ohm 1/2 watt) resistors burned when the outputs shorted.
I took the shorted outputs out and tested them, they are indeed goners, i thought the thing MIGHT come out of protection with the outputs removed but it didnt, no relay click. ..i didnt think the resistors alone would prevent it from coming out of protection, that should be an open circuit at this point shouldnt it...
anyway, im gonna eat breakfast and then start checking voltages and what not. ill also measure the nearby resistors that have soot/flame marks on them, and those regulators and diodes.
also attached is a picture of the bottom side, which visually looks ok, nothing stood out as being burned.