Can anybody with an Infinity PS-10 and a multimeter get a couple of values for me? - AVS Forum
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post #1 of 6 Old 12-20-2008, 08:54 PM - Thread Starter
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Howdy folks. I recently purchased an Infinity PS-10 subwoofer second-hand that's giving me some grief (scratching noise upon power up and random shutdowns once the unit gets warm), and I took the unit apart to give it a quick look. A cursory glance showed a blown capacitor (C71) with a burn mark underneath it, which seems to have taken a surface mount resistor (C72) with it. The capacitor seems to be 6.8µF/100V, however when I put a multimeter on the C71 resistor, I get wildly varying impedance levels of about 280-320 ohms. So essentially I need the value of the offending resistor. Any insight would be much appreciated.
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post #2 of 6 Old 01-04-2009, 07:21 PM
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That is a 0.1uF capacitor.

You may be able to get the PS-10 service manual off the infinity web site. You can definitely get the PS210 and TSS-SUB750 service manuals and the circuits are very similar.

Can you tell me something about your circuit board? There are two big capacitors (C6 and C8) on the board. They are either 3300uF or 4700uF. Can you tell me if there is a brown goo or cement bonding them to the PCB? I have never seen anything like it and I think it may indicate an issue with these CAPs.
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post #3 of 6 Old 03-31-2009, 12:20 AM
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Hi, I have a couple Q's about the same problem.
Is my board to burnt to fix? Is d34 toast also?


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Can you tell me if there is a brown goo or cement bonding them to the PCB?

Here is what mine looks like.
c8 looked swollen to me so I was going to replace c8 and c6. Should I also replace the resistors c3 and c7 then?

Any input would help out, thanks.
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post #4 of 6 Old 08-03-2013, 12:31 PM
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post #5 of 6 Old 12-21-2013, 11:30 AM
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I have the same issue....woofer works ok for a while but then begins clicking.  I can see the burn mark on the bottom of the board.

 

Just FYI, any part number that has a C designation is not a resistor, it is a capacitor, likely ceramic if it is surface mount.  You will not have any luck attempting to extract a value for these using a multimeter.

 

From what I can see on my board...C72 is the offending capacitor.

 

It is an ELYTONE 6.8uF +-10% 100V Electrolytic Capacitor

 

I am starting with that one and seeing what happens.

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post #6 of 6 Old 12-21-2013, 11:57 AM
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