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Old 26th Jun 2013, 11:24 am   #9
maninashed
Rest in Peace
 
Join Date: May 2011
Location: Preston, Lancashire UK
Posts: 955
Default Re: Tektronix 465B Scope - Some problems.

David, try and get hold of the proper manual for your 485 as a priority, check the serial number for the correct manual.
Yes it could well be the -8v cap, I had a similar problem with a 475, and just tacking on a good 6800uf (doubt you will find a 5500 of the right shape)wont do, a good quality, low esr one it will have to be. Be extremely careful desoldering, as if its anything like the rest of the 46x series, its a dual sided pcb and you will damage it, if you are careless. Use a vacuum desoldering tool, not a cheap pump type.
Bill
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