Cobra 29 LTD Classic no meter reading on RX only

[Lkaskel]

Hi Everyone,
I hope you all are safe as these storms blow through!!

I have a Cobra 29LTD Classic, 4-pin side mic, PC-900 board) in for alignment and everything works except the meter shows nothing on RX. The RX did align fine (-12db sinad @ -113db). The RF Gain knob and alignment adjustment (VR1) work. The RX meter adjustment has no effect. The meter does work on TX. Any thoughts on this one?

Thx!!

 

[999]

Check the SWR/CAL/SRF switch. If there is a bad contact in there it would cause an issue.

 

[Lkaskel]

A little update here. I had a few minutes today at the bench. Also, see attached for a better schematic that shows this circuit and a pic of the board.

When in TX mode I get 65mA at the meter (about 1/2 way). Based on the schematic, should I get a similar reading at D5 or at D316? I will have a few minutes tomorrow night to look at it again.

Thanks!!