OPTICAL SYSTEMS DESIGN
DOC ID: 10103502
OSD553 OPERATOR MANUAL
PAGE 8
3.
MAINTENANCE
3.1
INTRODUCTION
The following section outlines the fault finding procedures for the OSD553 modem.
Please take note of the following:
Personnel without considerable technical training should not attempt any maintenance
except that outlined below.
If further maintenance is attempted you are warned that every care should be taken to
ensure that internal measurements made while the equipment is running are taken
carefully, as some components are extremely expensive and can be damaged by failure
of any portion of their support circuitry.
3.2
EXTERNAL INSPECTION
Visually check the following:
Check that the power supply voltages are correct on the Power Supply Unit (+12 to
+17VDC and -12 to -17VDC for the OSD911 and +11.5 to +12.5VDC on the OSD921).
Check that video signal is connected to the remote video transmitter and that the OSD553
has been correctly connected to properly terminated external equipment.
Inspect optical connectors, and clean using acetone and a lint free tissue to remove
contamination.
Check that the transmitter’s optical power is at a level appropriate to the link distance.
3.3
ROUTINE MAINTENANCE
No routine maintenance is required for this equipment.
