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| SE/30 focus control issue |
Posted by: MJ313 on 2015-12-11 06:21:03
So I recently re-capped my SE/30 analog board, but the focus control isn't working. Cutoff does work just fine. I have searched the forums and TomLee and trag mentioned R26 as the issue. In addition to that TomLee says this:
"If the cutoff adjustment works, and given that you have verified that the focus control has no effect, the problem is either a bad 1M resistor (the previously-mentioned R26), or a poor connection between the focus control wiper and the CRT focus electrode. Verify that there's continuity between the wiper and J2-9"
What is a focus control wiper??
Also, can I test R26 right on the board, or do I have to remove it first? Or just replace it, because it's probably a cheap part?
Thanks very much for any info.
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Posted by: uniserver on 2015-12-11 12:12:23
yeah there is a resistor that is Right there, by the pot that needs to be changed... i have seen this a few times.
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Posted by: MJ313 on 2015-12-12 08:01:36
Thank you sir, for the confirmation. I will just replace it and touch up any bad solder joints on the video board connector.
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Posted by: MJ313 on 2015-12-19 09:15:02
By gawd it works!
I got this one:
http://www.mouser.com/ProductDetail/KOA-Speer/MF1-2LCT52R105J/?qs=sGAEpiMZZMv8QEQcPUP6BZbIQ8lyR96u
I threw it in, repaired some joints and it works a treat.
Thanks Charles and trag!
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Posted by: uniserver on 2015-12-19 23:42:26
awesome! i knew you could do it!
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Posted by: trag on 2015-12-20 19:50:15
You're welcome.
Old searchable postings, the gift that keeps on giving.
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