Holland Electronics NE 1101L - Manual (Page 19)

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Forward Optical Receiver Operation Manual
Chapter 6 Maintenance and Repair
Problem Repair Procedure
POWER LED does not light,
and the receiver does not
work
1) Inspect the rear panel AC POWER switch, make sure the switch is set to the [ON]
position.
2) Inspect the physical condition of the AC POWER socket
3) Inspect the AC power cord, replace with new cord if damaged.
4) Inspect the AC fuse, if necessary replace with a new fuse with rating of 250V/3.15A.
Do not use fuse with any other rating.
Output power level too low 1) Inspect the connector; be sure to use the same type of connector (SC/APC or
SC/PC).
2) Clean carefully the end face of the connector.
3) Check the AC supply voltage. If below 90 VAC, then the output power level will be
below preset value
4) Open the connector panel; remove the internal connector, carefully clean the end
face, then reinstall into the connector panel.
Displayed video signal
deteriorates, excessive noise
present As above, handle fibers with care.
AGC function not work 1) Check the Pilot tone level, if the pilot is lower than normal, select MGC or RF AGC
mode