[R-390] Zero adjust

[David Elsea]

Hello Group,

Can someone lead me to the repair or adjustment of the zero adjustment mechanism?  Mine appears not to be working and the manual I have is vague on this subject.  If I understand correctly there is somewhat of a clutch action to allow the knob to adjust to a known frequency.  When I turn the knob it bows the front panel of the receiver and the tuning mechanism stays locked up.  You might mention how easy od difficult the job is.  Thanks in advance for all responses.            Dave w6dke

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