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Chapter 5 5-47
Errors and Troubleshooting
Troubleshooting Without the Front Panel or RMC Web-Based Library
Administrator
Errors and Troubleshooting
Errors & Troubleshooting
• The front panel is fused both on the library controller and the front
panel.
— If the short is on the front panel board, replacing the front panel
assembly will fix the problem.
— If the problem is a short elsewhere, a fuse on the library controller
will open. On a single level library, the power for the front panel
comes from library controller, into the mother board, and then into
the front panel cable. On multi-level libraries this is also true, but
additionally, power goes up the interconnect cable(s), to the next
level mother board(s), and to the next level(s) front panel cable.
Consequently, on a multi-level library, the front panel power is
present on all mother boards, interconnect cables, and front panel
cables.
— If the front panel power is shorted to ground on any of the mother
boards, the fuse on the library controller will open. If any of the
front panel cables from the mother board to the front of the library
has power shorted to ground, the fuse on the library controller will
open. The library controller will continue to operate normally and
not detect these failures. The front panel cable is very difficult to
replace, and every effort should be made to determine that the
problem is not with another assembly.
NOTE Because the library controller must be replaced each time a change is
made that does not resolve the short, it may be necessary to replace
multiple library controllers before resolving the shorting problem.