As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DOES NOT GENERATE SIGNAL. REPLACED BAD F401 FUSE, BAD V101 CAVITY AND BAD R477 RESISTOR. REPAIRED PROBLEM. ADJUSTED PULSE WIDTH AND FREQUENCY. FOUND DYNAMIC RANGE BAD. ALIGNED PRESELECTOR AND IF SECTION. REPAIRED PROBLEM. ALSO REPLACED FACEPLATE AND V301 PHOTOCELL AND CLEANED CODE SELECTOR WAFER SWITCHES. BENCH CHECK GOOD.