Troubleshooting Guide - Bosch LTC 8900 Series Installation Manual

98 en | Troubleshooting Guide
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Troubleshooting Guide

The LTC 8900 Allegiant system was designed to provide very high reliability. However, if a
failure does occur, the effects of the failure depend on system design and the location of the
failure.
For example, in a standard nonredundant system, an LTC 8904 Series CPU bay failure could
disable the entire system, while a monitor bay failure would disable only the monitors
connected to the failed bay.
, page 98 (below) lists the worst-case impact resulting from failure of the LTC 8900 system
components. If system troubleshooting becomes necessary, follow these guidelines:
Matrix Bay Checkout
Indication
Main power switch is ON, but the Power LED
indicator is not lit
Any of the green LED indicators on the front of
the matrix bay power supply are not illuminated
Intermittent video output or system operation
Power Supply LEDs are lit, but there is no
power indication on modules or accessory
devices
Keyboard Checkout
There are no keyboard display indicators
Keyboard indicators are lit but the keyboard is
inoperative
2015.01 | 10.6 |
Resolution
Check the main line fuse on the rear of the main bay. Refer to
the Maintenance Information, page 101 for replacement
instructions.
Replace the blown fuses associated with any unit fuse
indicators.
Verify that all circuit card modules are properly seated in their
respective rack connectors.
Verify proper seating of the power supply within card cage.
Verify that the supplied retaining screws are installed.
Check the interconnect cable for cut or broken wires between
the keyboard and the main CPU bay. Replace the cable if
necessary. Relocate the keyboard connector on the main CPU
bay to another keyboard input port. Replace the keyboard.
Verify that the keyboard is logged-on to the system (if log-on
feature has been enabled). Check the interconnect cable for cut
or broken wires between the keyboard and the main CPU bay.
Replace the cable if necessary. Relocate the keyboard connector
on the main CPU bay to another keyboard input port. Replace
the keyboard.
Installation Manual
LTC 8900 Series
Bosch Security Systems, Inc.