c51 defect?

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RudiBrueller
 
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Joined: Sun Feb 01, 2015 1:36 pm

c51 defect?

Post by RudiBrueller »

Hello,

My xoxbox is built and im on troubleshooting now. I cant get the right voltages for IC14 at all.

I found out, that there is something wrong with the voltages of C51. I measured 4V on its positive side and just 0,25V on the negative side (which should be around 2,95V. Now im woundering if its the capacitor or is it because of its behavior in this circuit?

C51 was also the only part which was missing in my kit and i bought a 2.2μF (65V) in a local store which should be fine. So it was the last part i soldered (and yes, polarity is right).

thanks, tobi

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antto
 
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Joined: Thu Apr 15, 2010 3:21 pm

Re: c51 defect?

Post by antto »

i get 3.85V on the positive side of C51 and 2.90V on the negative side
if your IC14 is socketed, i'd remove it from the socket, turn the x0x off, and measure resistance from pin2 of IC14 to ground

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RudiBrueller
 
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Joined: Sun Feb 01, 2015 1:36 pm

Re: c51 defect?

Post by RudiBrueller »

Thanks a lot, i think it was defect. Went to the store this evening and replaced it, now thw whole hp section works.

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