NuTone IMA4406 CD Player - A New Problem Has Shown Up

I Found a New Problem with a NuTone IMA4406

Well, its been almost 1 year since I posted any new information about the NuTone IMA4406 Music intercom System.  That's because up until yesterday, there wasn't anything new to report about, just alot of the same problems over and over with the master Stations that have been sent in for repair.

Yesterday I was working on an IMA4406 that was originally installed in October 2004.  I know the installation date because I installed the system when my customer was building their new home.

They reported that they were having trouble with the system working intermittently and especially the door chime, which only worked some of the time.  During the Service call, i noticed that several of the main capacitors in the Power Module had already vented and their tops were bulged out.

I removed the IMA4406 and brought it back to the shop for a rebuild.  I though this would be just another normal rebuild like so many early 2000's IMA4406 needed.

When I disassembled the IMA4406, I had to remove the CD Players Control Circuit Board and that's when i noticed some interesting.

In the power supply section of the CD Player Control Board, I noticed that there were 3 capacitors that had vented just like the ones in the power supply.

The owners didn't report any specific CD Player related problems and I hadn't really checked out the CD before starting the rebuild, so I can;t say for certain if these failed parts had affected the CD Players operation or not.

I replaced all 7 of the power supply capacitors on the Control Board and i noticed that there were 3 different brands of parts used.  The 3 that had failed were the same brand, so maybe it's another "quality of component" problem.