TANDBERG TT-1222, Reference Manual

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Preventive Maintenance and Fault-finding
Page 7-6 Reference Guide: TT1222 4:2:0 Professional Receiver
ST.RE.TT1222.2
7.5 Fault-finding
7.5.1 General
The information contained in this chapter is intended to isolate the unit as
the faulty equipment if a system failure occurs. If the following information
fails to clear the abnormal condition, please contact Customer Services
using the information given in the Preliminary pages of this
Reference Guide.
7.5.2 Preliminary Investigation
1. Ensure that all leads and connectors are in place and serviceable.
2. Ensure the unit is powered.
3. Ensure that the front panel LED is not lit. If it is lit, investigate the
cause of the alarm in the alarm status menu as explained in
Chapter 6, Alarms/GPOs. If the LED is not lit, verify that alarm
conditions that could be met have not been masked as explained in
Chapter 6.
4. Verify signal lock, and that the BER is within the acceptable range
(QPSK input only).