TM 11-6625-3059-10
Section II. Troubleshooting Procedures
TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
ALL OF DISPLAY IS BLANK WITH POWER-OFF SWITCH IN POWER POSITION (Power on)
Step 1. Check that primary power is present
at ME-525A/USM power input (rear panel).
Verify 120 or 240 VAC present at ME-525A/USM.
Step 2. Check fuse (0.5A, 120 VAC or 0.25A
240 VAC).
Verify proper fuse installed.
2.
ME-525A/USM DOES NOT OPERATE IN TUNING AUTO MODE.
Step 1. Check connections to signal under
test.
Verify connections are correct and adequate signal
present.
Step 2. Provide local oscillator signal at
rear EXT OSC connector and operate in EXT
mode.
If operation in TUNING EXT mode is satisfactory, higher
level of maintenance needed.
3.
ME-525AIUSM DOES NOT OPERATE IN TUNING AUTO AND EXT MODE.
Check connections to signal under test.
If satisfactory, higher level of maintenance required.
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