Outdoor Broadband Repeater – Model: OAR02-010
IM456213-10 Rev –
15
Remove the top cover of the repeater.
1
WARNING
1
Removal of the cover of the transmitter allows access to 120/240
Volts AC which could be lethal. Internal troubleshooting requires that
this voltage remain on.
Replacement of parts should be done with external AC power
disconnected.
Lack of +12 VDC
If internal troubleshooting is required due to lack of +12 VDC in the external DC diagnostic
test, then check for internal VAC. If VAC is not correct, verify power fuse and check
internal cabling. If VAC is correct, check +12 VDC on the terminal strips. If this voltage is
missing, first disconnect the output from the power supply terminals and recheck the
voltage.
If the power supply voltage with no load is not +12 VDC then the power supply is defective
and should be replaced.
If the voltage returns to normal, the load on the power supply is too high causing the
supply to go into crowbar and shut down. At this point, examine the wiring harness for an
obvious wiring fault. If no fault is found, then one of the modules supplied by that power
supply is shorted internally and should be replaced. To identify the module lift the DC
power wire for each module one at a time from the terminal block until the DC power bus
is restored to normal.
Internal Quick Check
A quick check should show that the power amplifier is warm to the touch.
Power Amplifier not Warm
If the amplifier is cold, then check for +12 VDC at the solder terminal on the amplifier.
Power Supply O.K. and Power Amplifier Warm, but Low or No Output
Check all internal RF connections. For the SMA connectors, a 5/16" open end wrench is
required. "Finger-tight" is not acceptable for microwave connections.
CAUTION: DO NOT OVER TIGHTEN SMA FITTINGS.
Check the output of the transmitter. Measure the microwave power with a coupler at the
output. If the output is low, the power amplifier is defective. Replace the power amplifier.
