Installation Manual

Remove the fuse from the holder (as in , page 104), and replace it with a fuse of the same
rating (1.6 A, 250 V) for continued protection. Reinstall the fuse holder into the connector
housing in the same orientation as indicated by the arrow on the door cover. Snap the door
closed. After replacing the fuse, verify system start-up and operation.
Matrix Bay Power Supply Fuse Replacement
The main power supply is located in the far righthandside of the equipment bay. Remove the
front panel of the bay by loosening the four (4) fasteners. Locate the fuse to be replaced by
observing the green LED indicators. Note which LED indicators are not lit, then turn off the
main power switch on the power supply. Replace the fuses associated with the LEDs that
were not lit. Switch on the main power switch and verify that all LEDs are now illuminated.
Replace the front panel.
Fuse Value/Size Power Supply Model
LTC 8805 (8903 Bays) LTC 8906 (8902 Bays)
100 mA / 250v 5 mm Yes Yes
500 mA / 250v 5 mm Yes Yes
1.0 A / 250v 5 mm Yes Yes
2.0 A / 250v 5 mm Yes Yes
3.15 A / 250v 5 mm Yes Yes
6.3 A / 250v 5 mm Yes Not Used
Replacing LTC 8901 or LTC 8904 Series CPU Parts
Replacement CPU boards (LTC 8910/00) and power supplies (LTC 8905/90) can be
purchased to repair failed components. For minimum downtime however, the entire LTC 8901
or LTC 8904 Series bay can be swapped out.
In redundant system configurations, the unique Data Mirroring functions of the System
Supervisor PC software can be used to automatically configure the new LTC 8901 Series CPU
bay, making the replacement almost transparent to the system.
For example, if the primary CPU has failed in the LTC 8901 Series CPU bay, the system will
have automatically switched to the backup CPU, and continues normal operation. To replace
the LTC 8901 Series CPU bay, proceed as follows:
1. Install the new LTC 8901 Series CPU bay adjacent to the old LTC 8901 Series CPU bay.
2. Move the console cable, connected to the failed CPU Controller input on the old LTC
8901 Series CPU bay, to the corresponding input on the new LTC 8901 Series CPU bay.
In this example, the cable would be moved from the Primary Controller connector on the
old bay to the Primary Controller connector on the new bay.
3. Move the LAN cable, connected to the failed CPU LAN input on the old LTC 8901 Series
CPU bay, to the corresponding input on the new LTC 8901 Series CPU bay. In this
example, the cable would be moved from the Primary LAN connector on the old bay to
the Primary LAN connector on the new bay.
4. Apply power to the new LTC 8901 Series CPU bay.
5. From the System Supervisor software, enable Data Mirroring. This causes the
configuration data in the old LTC 8901 Series CPU bay to be copied to the new LTC 8901
Series CPU bay.
10.4
10.5
LTC 8900 Series Maintenance Information | en 105
Bosch Security Systems, Inc. Installation Manual 2016.04 | 10.7 | F.01U.323.096