[Amps] Alpha 87A fault 33 when pressing TUNE DOWN

Larry Dighera LDighera at att.net
Thu Aug 1 13:48:24 EDT 2019

Hello Dave,

I suggest you post this message to the Yahoo Alpha 87A group where
Alpha techs can see it:

I've CCed this message there.

Best regards,

On Tue, 30 Jul 2019 11:37:14 -0400, Dave <rocketnj at gmail.com> wrote:

>Hi all
>Looking at an old 87A for a friend. 
>This is a 91xxx s/n without AlphaMax and NO updates done to amp. 
>Originally faulting with fault 8. Replaced bad RX PIN diodes with 1N4007 diodes and TX PIN with pair of UM4006D. No more fault 8. 
>Now whenever you press TUNE DOWN it immediately faults with fault 33. (Tune motor failed to initialize).
>Another clue is on power up both Load 
>LEDs flash but only the TINE UP LED flashes twice. (Tune down does not flash). But Tune Down LED does light when pressing Tune Down. 
>Any ideas appreciated   
>Dave wo2x

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