Hi!
Could someone please help with an advice with my model 600?
I have just recapped my model 600, 4 main caps and all the caps on the power supply board.
Upon initial power up there was the sound of a spark (I did not actually see it) accompanied by slight traces of bright smoke and a light smell.
Initially I wanted to shut it down again but then I recognized the relay clicking within the normal time period and the bias stabilizing at roughly 30mV (a DMM was connected). So I left it switched on for about half an hour on my test bench with some test speakers. I had almost zero DC offset from the beginning and could adjust for quite stable bias on both channels. There was undistorted sound from both channels, too.
Visual inspection of parts did not show any problems yet. All polarities have been checked and double checked before first power up and there are no terminals too close to each other or to chassis ground.
About one hour after that first test I switched it on again and everything powered up normally and remained like that.
Is it possible that this initial frightening phenomenon was caused by the first rushing in of power and loading of all those new caps?
Which power supply parts or voltages should I check before putting it into daily service again?
Thanks to all in advance.
Marc,
Austria
Could someone please help with an advice with my model 600?
I have just recapped my model 600, 4 main caps and all the caps on the power supply board.
Upon initial power up there was the sound of a spark (I did not actually see it) accompanied by slight traces of bright smoke and a light smell.
Initially I wanted to shut it down again but then I recognized the relay clicking within the normal time period and the bias stabilizing at roughly 30mV (a DMM was connected). So I left it switched on for about half an hour on my test bench with some test speakers. I had almost zero DC offset from the beginning and could adjust for quite stable bias on both channels. There was undistorted sound from both channels, too.
Visual inspection of parts did not show any problems yet. All polarities have been checked and double checked before first power up and there are no terminals too close to each other or to chassis ground.
About one hour after that first test I switched it on again and everything powered up normally and remained like that.
Is it possible that this initial frightening phenomenon was caused by the first rushing in of power and loading of all those new caps?
Which power supply parts or voltages should I check before putting it into daily service again?
Thanks to all in advance.
Marc,
Austria