Because r184 and 185 are to have a standby voltage. When music is detected, an op-amp turn on an optocoupleur (U17) and this one close a relay to bypass r184 and r185 to have full power on transformer.Not sure I know now to short 184,185 ! I like your ideas!
What do you think of that reading?
I ordered some chip quik solder to help.
Is theauto on part the relay?You have probably a problem on the auto on part. Tried to bypass it. Remove r186 and bypass r184 185. And retry with the bulb in series
You have probably a problem on the auto on part. Tried to bypass it. Remove r186 and bypass r184 185. And retry with the bulb in series
You right, without input the auto-on should be off.Another thing I do not understand. If there was no audio signal how did the relays even get activated?
Maybe I should bypass the resistors to see if I can stop the buzzing!
Yes, when audio is detected C59 is fill-up and this turn on the optocoupler (u17) (throw the op-amp) When the sound isn't there. C59 become empty very slowly by R173 and after a while optocoupler (u17) turn off.Is theauto on part the relay?
DC voltage of bridge 68 instead of 80. My question is could the bridge have an issue reducing the voltage making the relay buzz?
What happens is this: With lamp in series, I turn on and the relay acts like a buzzer for about 5 seconds and the lamp glows dimly. After that the buzzing stops and lamp goes out but voltage remains 68vYou right, without input the auto-on should be off.
Yes, when audio is detected C59 is fill-up and this turn on the optocoupler (u17) (throw the op-amp) When the sound isn't there. C59 become empty very slowly by R173 and after a while optocoupler (u17) turn off.
I know this because it's the same process on my ps-1000 and i looked that on oscilloscope.
You have maybe something here. As per datasheet you should have 80. Now yes maybe the bridge is defective or you pull too much current and this is lowering the output. Is the lamp was turning on ? If yes you maybe pull to much current. If not, it's maybe the bridge but it's hard to believe because when you do not have any load. If the bridge is broken on a side, You should have 80v anyway because you don't have any load. Or 68V it's maybe ok and the datasheet is wrong ?
the op-amp should work with +4 and -4v do you have this voltage. Check the lm324 datasheet for pinout.
No no, just check voltage if you have +-4 v. that's allAre you asking if I can deliver 4 v to a lead on op amp. I I think I have a variable power supply somewhere on my bench. Whats the process. The diode appear to be working on one side of the op amp. I guess I have to apply current to switch on the other side?
What happens is this: With lamp in series, I turn on and the relay acts like a buzzer for about 5 seconds and the lamp glows dimly. After that the buzzing stops and lamp goes out but voltage remains 68v