Interlude IL60

TrevorPearman · Joined: 25 Feb 2007 Posts: 2

In case anybody cares

Fixed my Interlude IL60. Both sub-woofers died within about three months of each other

Problem traced to R509 (100k 1/2W resistor) in the BASH power supply board.

In both subs, this resistor had gone open circuit. Replacing restored normal operation. Replaced with 1W instead of 1/2W resistors. I suspect they are underated.
_________________
-- Trevor

duc91696 · Joined: 28 Jun 2007 Posts: 1

I have been looking for an answer to this problem for a while now; both of my subs have not been working for years. The Infinity repair shops want an arm and a leg to fix, just about what I paid for them. There are not many forums discussing this particular problem. Could you elaborate a little bit more on this fix? I am a fairly technical person and do not mind trying it myself. Any assistance would be appreciated.

TrevorPearman · Joined: 25 Feb 2007 Posts: 2

R509 can be seen in the power supply schematic in grid C6, page 36.

You can get the manual from http://manuals.harman.com/INF/HOM/Service%20Manual/IL60%20sm.pdf

Track that down on the power supply board and measure with a meter. I found it to be open circuit on both speakers (quite a coincedence).

-- Trevor
_________________
-- Trevor

Heliocentrik · Guest

Thanks to Trevor Pearman for helping me identify this problem and suggesting a fix. I had the exact same problem, and in the service manual he references, the suggested diagnosis passed (MOSFETS and other resistors). But, in checking the R509 on the power PCB, it was an open circuit as well. Just replaced this afternoon, and is now working! Thank you Trevor and thank you Internet!