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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Bad pot
Well, not the kind you smoke anyway. (And that's Potentiometer to
LV to be politically grammatically correct). Just ran across a powered sub woofer that was dead. Nothing seemed fried. Further tests showed no continuity off the volume control. Pretty standard cheap dual gang 50K control. Took it off expecting to see a cracked board. The board was not cracked on either section. Thought this was quite strange. I fluked across the carbon and it was OK. What seems to have happened in this unit was where the carbon track gets riveted to the terminal developed a open circuit condition. I have never seen one do that before. And it happened on both sections. on more than one unit. Definitely a cheap pot with a latent manufacturing defect. I have seen similar pots in pro sound gear, so be on the look out. Its says "HV A50K" on this specimen. Bob ----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups ----= East and West-Coast Server Farms - Total Privacy via Encryption =---- |