or Connect
AVS › AVS Forum › Gaming & Content Streaming › ReplayTV & Showstopper PVRs › 5000 Series Power Supply Repair
New Posts  All Forums:Forum Nav:

5000 Series Power Supply Repair

post #1 of 4
Thread Starter 
As evidenced by a failure to boot at all, no video output, a stopped fan and particularly with Mikeyboy's diagnostic advice, I found myself with a power supply that suffered from the somewhat typical problem of being a volt low on the yellow wires to the motherboard (2.3 instead of 3.3 volts). After removing the PS board I looked closely to see if there was any obvious cause of the failure - and there was!
The capacitor located just inboard of the coil had a very small hole in the top right at the intersection of the X scored on the top. That scored X is there to provide a weak spot for a cap to pop when it fails and it worked as designed. That particular cap is a 2200mfd 10v electrolytic. Basic soldering skills are all that's required to change the cap which is available at any well stocked electronics shop (cost $2). Use some desoldering wick to remove the bad cap and solder in the new one being sure to observe polarity - the negative side to the shaded hole - and you're good to go.
post #2 of 4
I pays to be handy with a soldering iron- and some knowledge!
post #3 of 4
The electrolytic caps do have a finite lifetime. At work, we have a ten-year replacement program for these capacitors on our older control systems and power supplies. It is not that the caps will fail at ten-years, just that their reliability starts to degrade somewhere at 10+ years. However, I expect that we will see more units with bad caps in the next 3-5 years.

I have lost 3-4 motherboards made in the early 2000s to this failure mode. It is interesting to note the my motherboards from earlier are still working fine ( for example, a 1995 IBM Aptiva that I use for running rehearsal scores when my spouse directs theatrical productions)
post #4 of 4
Quote:
Originally Posted by brobin View Post

As evidenced by a failure to boot at all, no video output, a stopped fan and particularly with Mikeyboy's diagnostic advice, I found myself with a power supply that suffered from the somewhat typical problem of being a volt low on the yellow wires to the motherboard (2.3 instead of 3.3 volts). After removing the PS board I looked closely to see if there was any obvious cause of the failure - and there was!
The capacitor located just inboard of the coil had a very small hole in the top right at the intersection of the X scored on the top. That scored X is there to provide a weak spot for a cap to pop when it fails and it worked as designed. That particular cap is a 2200mfd 10v electrolytic. Basic soldering skills are all that's required to change the cap which is available at any well stocked electronics shop (cost $2). Use some desoldering wick to remove the bad cap and solder in the new one being sure to observe polarity - the negative side to the shaded hole - and you're good to go.

good catch. ill check that on one i have from ebay that igot for parts. its got lifetime service. dan
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: ReplayTV & Showstopper PVRs
AVS › AVS Forum › Gaming & Content Streaming › ReplayTV & Showstopper PVRs › 5000 Series Power Supply Repair