5 replies to this topic

[n5x]

I have a 7800 (wont power on)that has a blown capacitor in the upper right hand corner by the power connector. Unfortunately the label is gone can anyone tell me what the value and voltage of that capacitor was thanks.

[n5x]

n5x, on Wed Mar 16, 2011 8:00 AM, said:

I have a 7800 (wont power on)that has a blown capacitor in the upper right hand corner by the power connector. Unfortunately the label is gone can anyone tell me what the value and voltage of that capacitor was thanks.

I found it was a 2200 uf 25 volt electrolytic capacitor and it working again

[nathanallan]

Great to read that you fixed it! Did you spend most of the morning on it or were you able to find it out right away? Just looking at the times of the posts above; quick diagnosis and fixes are cool.

[n5x]

nathanallan, on Wed Mar 16, 2011 5:08 PM, said:

Great to read that you fixed it! Did you spend most of the morning on it or were you able to find it out right away? Just looking at the times of the posts above; quick diagnosis and fixes are cool.

I could tell at least that was wrong the cap was swollen and the label had melted away. Luckily I found a piture someone took of the board on the web so I figured out what to replace it with. So I took a chance and replaced it and the board worked. I guess the cap got old or took some kind of a surge. I'm leaning toward surge since I also had to replace the cap and the power adapter.

[gdement]

The original is actually 2200uF 16v, but 25v is fine (I used that on mine also). That cap is on the input from the adapter which is only something around 9-12v. It's just a generic 85C cap, I'd use a long-life rated 105C cap to replace it, just because we want these things to work until we die.

[n5x]

gdement, on Thu Mar 17, 2011 8:49 AM, said:

The original is actually 2200uF 16v, but 25v is fine (I used that on mine also). That cap is on the input from the adapter which is only something around 9-12v. It's just a generic 85C cap, I'd use a long-life rated 105C cap to replace it, just because we want these things to work until we die.

I like that idea