CAUTION
To prevent possible injury or equipment damage, BEFORE APPLYING POWER af-
ter the Executive PCBA is replaced, MAKE SURE THE CABINETDOOR IS OPEN.
When power is applied to the TLS while the cabinet door is open, no TLS motors
will operate. The configuration information in the new Executive PCBA must be
updated to match the library’s installed hardware, BEFORE any TLS motors are al-
lowed to operate. See Section 7.14.3.
Executive PCBA Flash PROM
The flash PROM on the Executive PCBA contains only the operating firmware and
none of a unit's configuration information. The number of items in the configuration
data set may change with firmware revisions. It is always recommended that when
changing the Executive PCBA, the firmware revision level remain unchanged until
the new board is properly installed and the unit works satisfactorily. Only then
should the firmware be upgraded. Don't attempt to do two things at once, it can cause
problems.
7.14.2.2 Replacing the Executive PCBA
NOTE
In the next step, the spacers behind the mounting nuts on the PCBA Mounting Studs come loose
when the nuts are removed.
1.
Remove all four nuts from the PCBA mounting studs, then make sure that all
four PCBA spacers are in place on the PCBA mounting studs.
2.
Lift the top of the Executive PCBA into the rear panel opening, but do not place
it onto the mounting studs.
3.
Press the Front cable firmly into the FRONT connector, until both locking tabs
on the FRONT connector close over the Front cable’s connector.
4.
Press the I/O port cable firmly into the IOPORT connector, until both locking
tabs on the IOPORT connector close over the I/O port cable’s connector.
5.
If a ground lug exits, plug in onto the FRAME terminal.
6.
Plug the Power cable onto the POWER connector.
7.
First, make sure that the remaining cables are not behind the Executive PCBA,
and that they have not fallen down inside of the TLS. Next, lift the Executive
PCBA up into the Rear Panel opening, past the mounting studs. Finally, push
the bottom edge of the Executive PCBA into the Rear Panel opening.
8.
Lower the Executive PCBA to align all four mounting stud holes in the PCBA
with all four PCBA mounting studs, then install the PCBA onto the studs.
7-48
Field–Replaceable Units (FRUs)
501380 Rev. B
