Hi guys !
First post on this forum, I registered myself just to say : THANK YOU
Thank you to all the guys out there who helped, with clear pics, clear how-to, to help save my amp !
So, I deciced to help as much as I could, even if every informations needed are already in the thread.
I bought last week a "perfectly working" TX-NR906
I found online (next to my "old" Pioneer VSX-824K)
2 hours ride, a little chat with the seller, no way to test it, a few buck wisely spent, 2 hours back, test ... and you guess what's next.
So i found a few videos, a few topics, but this thread in particular helped very much.
I decided to change all the 100 and 220 uF of the HDMI board.
According to many, only 100uF are to be changed, but others needed to change the 220 uF too; so I decided to change both at the same time, just in case !
I decided to stuck with the surface mount capacitors, harder to use / solder, but better looking IMO. No change in performance / lifetime.
I ordered at Farnell.com, for less than 10 bucks, and got it 18h after ordering.
As everyone here, I recommend getting higher voltage / higher temp capacitors than the stock ones
. I chose 16v / 105° capacitors; they are so cheap, don't mind getting better ones than the stock one who failed
So, here is my work place :
And both sides of my HDMI card (reminder, TX-NR906) :
There is a total of 20 capacitors to change :
13 x 100 uF (5 on side A, 8 on side B)
7 x 200 uF (3 on side A, 4 on side B)
Half an hour later, everything was back in place and, guess what, ... working perfectly
But I wanted to do more.
If it failed once, it could have failed twice and that's not how I live !
So i decided to setup a cooling fan on top of my amp, to avoid too-high temps.
I picked up an old 120mm computer cooling fan, a USB cable to power it in 5v, a thermometer to test the results and let's go !
5v instead of the 12v the fan should have has drastically reduced the RPM of it, to be honest it's barely rotating and no way to hear !
If i should approximate, it's probably around 100 rpm ...
Anyway, i did mesure temps during hours of normal listenning, in normal condition (wired up, in place, ..)
After 2h, i reached the max temp on top of my amp, with 59°C
I started the fan, and waited 2h again, to see how much the temp would eventually drop.
Trust me or not, in 5 minutes
to temp went from 59 to 42°c
At the end of the 2 hours, it was at 37°c.
So, i won 22°c
just by adding a low-speed 5v computer fan !
Isn't it cool ?
At the end of the day, it look like that :
Yep, i know, it's pretty ugly and I could have done better. I know.
But, hey, what's the purpose ? Being pretty or cooling it down without making any noise ?
I'm going for the second one, which achieves it perfectly
Voilà ! It's done and perfecly working.
(I'm french, it make me laugh saying "voilà" with the english accent as it's french
Sorry for the lack of visible pics, but I coudn't show them directly as I'm not 5 posts old, sorry for that.
Hope my post will help !