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SGC-237 Tuner Failure

ScannerHam62

New Member
Feb 1, 2020
12
4
3
67
Anyone have any experience with these tuners failing? The tuner powers up like it should but when RF is applied nothing happens. I think one or more of the RF sense diodes are bad? The unit was mounted inside my attic and I think RF got back into the tuner from the antenna. Anyway I have read about these RF sense diodes opening.
Anyone have any experience with this failure? Does anyone have a schematic? I cant figure out where these RF sense diodes are.

Thank in advance,

ScannerHam62
 

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