Looking at the schematic, it appears that the power switch controls the 9.5 volt line and there doesn't seem to be a jumper to defeat it.? However, other incoming voltages may not be switched.
More information might be helpful to narrow down whether it is a module issue or a subrack issue.? For example:
1.? Have the symptoms just developed or is this a receiver module that you are using for the first time?? If it's new to you, my guess is that a prior owner modified it in some fashion.
2. Have you tried the receiver in a different slot in the sub-rack to see whether it behaves in the same fashion?
3.? Do you have another receiver that you can substitute to see whether it behaves the same way?
Do you have -- or can you make -- a test cable or extender board so that you can open and test the module outside of the rack?
KE6CD
