Thanks Andy,
I just revived my ex-trial box (replaced once under warranty in 2013).
With help from an old solderer with professional tools and skill to remove old caps, box now revived. I used Rubycon 16YXF220MY0811 cpc order code CA00167.
I used a microscope to check when solder new, I only soldered from bottom, not sure if supposed to solder from top as well, not all holes fully soldered. NB not all caps have polarity marked on board - take photos before to refer to.
I'm not sure domestic tools would be good enough to remove old caps - but if you try there is the optional destructive technique pliers/mole grips to crush cans and then solder to old legs!
The old caps were all +10% on capacitance 240-250uF, new ones all -5% 210-215uF. They are supposed to be +/- 20% spec. I didn't manage to locate a good ESR meter, but on one bridge old caps all 2-4 times (0.8-1.6 ohms) more than new (0.4 ohms). Most telling probably was that a component tester initially recognized one of the caps as a resistor not a capacitor.
Box still needed a visit to maintenance mode to reset firmware but no recordings lost. http://videos.youview.com/support/maintenance_mode.pdf Before cap change usually couldn't get anything on screen, occasionally first boot screen but I'm sure no buttons ever worked....
| Sat 9 Apr 2016 19:50:33
#13 |