On Wed, Mar 19, 2025 at 01:43 PM, Karl wrote:
The other end of C422 should do the same for R413 and R416 ends towards the rear of the pcb..but the connection is open
Karl, exactly where are you probing for R413/R416?? You say "towards the rear of the PCB", but R413 and R416 are located on the bottom of the pcb, directly under IC405, as are the resistors for the other section of that op-amp.?? So I'm wondering if you are mistaking R513 or R516 for the correct point - that would of course have an open circuit.
An easier place to probe for continuity of that same trace is at pin 2 of IC405, adjacent to where you probed for the other side of C422.
Stan KC7XE
