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There is a small ceramic disc capacitor that was destroyed on the JK PCB from a Roland JC120 that I am repairing. It is labeled C102 on that board schematic labeled as "15P". Is that considered a 15 pf? Now the print on the cap itself had 15J stamped on it. Is the "J" a tolerance rating? I need to order the correct one so is this a 15 pf and at what voltage should it be for this circuit based on the schematic?
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Here are the pics of the piece I'm working on.......
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It's not critical. It looks like is there to keep that stage stable or a bit of RF suppression. Most 15pF ceramics will have a NP0 dielectric, 5% or 10% will be fine. Don't sweatyk it
Last edited by nickb; 02-12-2017, 02:23 PM.Experience is something you get, just after you really needed it.Comment
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So this is more of a low voltage application. I have a 50V cap and that should be fine to use?Originally posted by nickb View PostIt's not critical. It looks like is there to keep that stage stable. Most 15pF ceramics will have a NP0 dielectric, 5% or 10% will be fine. Don't sweatyk itComment
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Yes that will be fine.Originally posted by sweatyk View PostExperience is something you get, just after you really needed it.Comment
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Originally posted by nickb View Post
Thanks nickb!
This has been a result of some physical damage to this amp. I have taken several pics from the start and plan to post a thread showing my process from beginning to the end once I have completed it and it's working. It will be titled "Roland JC120 pcb repair"....or something like thatComment
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Originally posted by sweatyk View Post
I see a few cracks in the PCB
. I suspect the 15pF is the least of your problems...
Experience is something you get, just after you really needed it.Comment
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All of the cracks have already been addressed. This board was brought to me in 3 pieces. It has been bonded together and traces reconnected.Originally posted by nickb View PostI see a few cracks in the PCB . I suspect the 15pF is the least of your problems...Comment
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