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Old 2nd October 2007, 06:18 AM   #1
grjr is offline grjr  United States
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Default help with dead Klipsch ProMedia 2.1

I hope this is the right place to post this. If not, sorry I'm new

I have a dead Klipsch ProMedia 2.1 that I'd like to get working again. Haven't done any troubleshooting yet because there are a couple of resistors that are charred. I'd like to know what their values are suppose to be before I start working on this thing. I have a picture of the resistors on the power supply PCB here:

http://picasaweb.google.com/grjr2000...10765367966242

you can zoom in to see the location of the two burned resistors, I assume they are probably the same value. If anyone could help identify what value they are suppose to be I'd be really grateful
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Old 3rd October 2007, 03:39 PM   #2
gni is offline gni  United States
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There is probably another cause for the resistors to be that
badly burnt. Short somewhere else in the circuit. . .short
at speaker connection. . . you will need to think of what was
happening when this occured to prevent it again and fix what
ever else is malfuncting.

Someone will have the same unit and open it up. . .there is hope.
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Old 3rd October 2007, 11:00 PM   #3
grjr is offline grjr  United States
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Yes, I know there is something wrong somewhere, would just like to know the value of the resistors
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Old 3rd October 2007, 11:21 PM   #4
gni is offline gni  United States
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It is possible that if you pull them. . .the bottom might not
be as blackened. . .less exposure to oxygen when it overheated.

Give it a try. . .
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Old 4th October 2007, 01:46 AM   #5
djk is offline djk
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Call Klipsch and have them send you the schematic.
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Old 4th October 2007, 07:56 PM   #6
gni is offline gni  United States
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I hope Klipsch will send the schematic. . . they can be helpful. . .I was looking at a purchase of some old Cornwalls. . . they gave some
great advice on what to look for. . .
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Old 6th July 2009, 02:04 PM   #7
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Default solution

I just had and repaired the same problem. Those two resistors are 82 ohms and are in the power supply for the control pod under one of the satellite speakers. They burned because something in the control pod is shorted. In my case it was a pair of transistors Q502, a 2N3904, and Q504, a 2N3906. Replace the burned resistors and figure out which transistors are shorted in the control pod and replace them. The schematics are helpfully provided by Dale Thompson at:

http://www.thompdale.com/bash_amplif...1_bash_amp.htm

Thank you Dale Thompson. Cheers
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Old 19th July 2009, 04:57 AM   #8
gni is offline gni  United States
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The schematic is always the best place to start. . . glad you were able
to get it and make the repairs. . . one less electronic land fill.
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Old 6th August 2009, 03:48 AM   #9
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Default Re: solution

Quote:
Originally posted by SamGreen
The schematics are helpfully provided by Dale Thompson at:

http://www.thompdale.com/bash_amplif...1_bash_amp.htm

Thank you Dale Thompson. Cheers
Glad you got it working again! That's the whole reason I made the schematics
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Old 23rd February 2010, 12:56 PM   #10
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Hi,

I got a set of these (Klipsch ProMedia 2.1) from the USA but I am in the UK so I was wondering whether it would be possible to change the internal power supply instead of using a step down converter.

What would you guys recommend?
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