First off, I'm clearly new here, so hello to everyone.
My reason for joining is to hopefully find someone who may be able to offer assistance in diagnosing what is wrong with my Logitech speakers.
Problem history: (it's a bit lengthy but please bear with me).
I'll start with the first anomaly with these speakers. A couple of years ago I thought they had died when they suddenly lost all power, checked the plug fuse and the slow blow fuse in the back of the sub and they were both good but still no light on the control unit as if a fuse had gone.
Left them unplugged over night and the next morning when I tried them they powered up and worked perfectly.
Same thing happened again after many months, and the same thing fixed it.
Recently though, they died and now completely refuse to power up.
Easy solution: bought another set on eBay.
They are not the same revision but they are fully functional. Job done.
Difficult solution, but far more satisfying:
I have had my logitech speakers for about 13 years and have grown quite sentimental about them and would love to get them repaired. I don't think there is much wrong with them since when they did power up they worked perfectly.
Progress so far:
I have done a visual check for bulging capacitors but they all look fine, I have opened up the working set of speakers to compare voltages etc. but the circuitry has a completely different layout. Despite this I have managed to find some correlations between the two and believe I may have found a discrepancy with the faulty set.
The working set has an 8v supply going to the control unit that I believe is the standby power that illuminates the power button etc. But on the faulty set this same pin is only showing about 0.2v.
I have tried to trace this back but can only follow it to a medium-sized capacitor and adiode located on the main board.
Could a faulty capacitor cause the issues that I have experienced?
How can I test if a capacitor is good or bad?
tl;dr
A couple of years ago I thought they had died when they suddenly lost all power, checked the plug fuse and the slow blow fuse in the back of the sub and they were both good but still no light on the control unit as if a fuse had gone.
Left them unplugged over night and the next morning when I tried them they powered up and worked perfectly.
Could a faulty capacitor cause the issues that I have experienced?
How can I test if a capacitor is good or bad?
I do have pictures and can post links if it would help.
My reason for joining is to hopefully find someone who may be able to offer assistance in diagnosing what is wrong with my Logitech speakers.
Problem history: (it's a bit lengthy but please bear with me).
I'll start with the first anomaly with these speakers. A couple of years ago I thought they had died when they suddenly lost all power, checked the plug fuse and the slow blow fuse in the back of the sub and they were both good but still no light on the control unit as if a fuse had gone.
Left them unplugged over night and the next morning when I tried them they powered up and worked perfectly.
Same thing happened again after many months, and the same thing fixed it.
Recently though, they died and now completely refuse to power up.
Easy solution: bought another set on eBay.
They are not the same revision but they are fully functional. Job done.
Difficult solution, but far more satisfying:
I have had my logitech speakers for about 13 years and have grown quite sentimental about them and would love to get them repaired. I don't think there is much wrong with them since when they did power up they worked perfectly.
Progress so far:
I have done a visual check for bulging capacitors but they all look fine, I have opened up the working set of speakers to compare voltages etc. but the circuitry has a completely different layout. Despite this I have managed to find some correlations between the two and believe I may have found a discrepancy with the faulty set.
The working set has an 8v supply going to the control unit that I believe is the standby power that illuminates the power button etc. But on the faulty set this same pin is only showing about 0.2v.
I have tried to trace this back but can only follow it to a medium-sized capacitor and adiode located on the main board.
Could a faulty capacitor cause the issues that I have experienced?
How can I test if a capacitor is good or bad?
tl;dr
A couple of years ago I thought they had died when they suddenly lost all power, checked the plug fuse and the slow blow fuse in the back of the sub and they were both good but still no light on the control unit as if a fuse had gone.
Left them unplugged over night and the next morning when I tried them they powered up and worked perfectly.
Could a faulty capacitor cause the issues that I have experienced?
How can I test if a capacitor is good or bad?
I do have pictures and can post links if it would help.