Hi all,
I have a home audio/HT setup with Marantz Pre-Amp, Citation 22 Power amp, Bose 901 speakers and a DBX sub-woofer. Audio sources are media play, DVD player and more. The citation 22 amp is from 1989. Last few days, the citation power amp has stopped working; the problem goes like this;
Does anyone have expertise in this area and can help guide me or point me in the right direction.
Thanks
I have a home audio/HT setup with Marantz Pre-Amp, Citation 22 Power amp, Bose 901 speakers and a DBX sub-woofer. Audio sources are media play, DVD player and more. The citation 22 amp is from 1989. Last few days, the citation power amp has stopped working; the problem goes like this;
- after power up, as normal the protest light comes on for a few seconds and then goes off.
- as soon as i play any audio source, the protect light immediately comes on and the amp stops.
- I had the same problem about 15 years ago and was able to find a repair shop who fixed. he said he had to replace some capacitors
Does anyone have expertise in this area and can help guide me or point me in the right direction.
Thanks
Hi DAudioGR,
The "repair kit" was probably the worst solution. Those are put together by people who read the manual and don't pick the right parts. Plus there are normally running production changes (different values of part). That's assuming the price conscious kit has good quality parts. Rare.
Honestly, a really good audio tech is actually highly skilled. There are many poor techs out there that think they are great. I would get that amp into the hands of the best tech you can find. It makes all the difference in the world to performance and longevity.
Don't watch YOUTube videos. Those people most often are not good at what they do. I am sick of cleaning up after people in service.
The "repair kit" was probably the worst solution. Those are put together by people who read the manual and don't pick the right parts. Plus there are normally running production changes (different values of part). That's assuming the price conscious kit has good quality parts. Rare.
Honestly, a really good audio tech is actually highly skilled. There are many poor techs out there that think they are great. I would get that amp into the hands of the best tech you can find. It makes all the difference in the world to performance and longevity.
Don't watch YOUTube videos. Those people most often are not good at what they do. I am sick of cleaning up after people in service.
Hi Anatech,
Thanks for your response. I agree. I am finding it difficult to find a audio tech in my area (Northern Virginia). Are you aware of any techs that can repair this?
Thanks for your response. I agree. I am finding it difficult to find a audio tech in my area (Northern Virginia). Are you aware of any techs that can repair this?
Why not try this?
Take your time. It may be a capacitor. Most likely in the protection circuit, I'd have to look. Normally there is a capacitor that filters out the audio to leave the DC average. If it goes open or way down in value, the protection will see normal audio as a fault.
Find that capacitor. When I have time I can look at a diagram but you'll have to remind me please. Then, select a new capacitor(s) of the same capacitance and probably higher voltage rating. Get one that has leads the same spacing as the holes in the PCB. Otherwise you'll have to form the leads without damaging the rubber seal (which most people do). Any other caps that look cheap or no-name, yank them and put proper capacitors in. Same for capacitors that are smaller than the originals physically. That means you'll pick them out one by one just like I do. I stock thousands of parts, but I order in the correct one if I don't have it.
Lead spacing is in mm. Take pictures of everything before you start, lot's. That way you know which way capacitors went in. Patience and you'll end up with a much better result.
Take your time. It may be a capacitor. Most likely in the protection circuit, I'd have to look. Normally there is a capacitor that filters out the audio to leave the DC average. If it goes open or way down in value, the protection will see normal audio as a fault.
Find that capacitor. When I have time I can look at a diagram but you'll have to remind me please. Then, select a new capacitor(s) of the same capacitance and probably higher voltage rating. Get one that has leads the same spacing as the holes in the PCB. Otherwise you'll have to form the leads without damaging the rubber seal (which most people do). Any other caps that look cheap or no-name, yank them and put proper capacitors in. Same for capacitors that are smaller than the originals physically. That means you'll pick them out one by one just like I do. I stock thousands of parts, but I order in the correct one if I don't have it.
Lead spacing is in mm. Take pictures of everything before you start, lot's. That way you know which way capacitors went in. Patience and you'll end up with a much better result.
