6.1 Power Up and Initialization Failures
When the library's power is first turned on, it does a Power-On Sequence Test and
then scans the inventory. The errors in this section occur during the power-
on/inventory-taking process.
6.1.1 When the power is turned on, no motion occurs, the control panel
display does not light up and the machine makes a regular, clicking sound.
The power supply modules are equipped with a feature that shuts them off if a short
on the output is detected, and a moment later they attempt to restart. They will re-
peat this until the problem is cleared or the power is turn off. This sequence causes
and audible click, which can be an aid in finding the problem.
Possible causes:
1.
The Handler power supply module has failed.
2.
There is a short in the Executive PCBA's +12V circuits.
6.1.2 When the power is turned on, no motion occurs, the control panel display
does not light up and the machine is quiet.
Possible causes:
1.
The unit is not connected to an AC power source.
2.
The AC power source is not active.
3.
The fuse is blown.
4.
The AC power is not connected properly internally.
5.
The fuse is blown due to a short in the internal wiring.
6.
The fuse is blown due to a failed power supply module.
7.
The Handler power supply module is not connected to the Executive PCBA.
8.
The Handler power supply module has failed.
9.
There is a short in the Executive PCBA's +12 volt circuits.
6.1.3 When the power is turned on, the control panel display lights up but does
not show text and nothing moves.
Possible causes:
1.
The Executive PCBA has failed.
2.
The Executive PCBA has never been factory-initialized.
501380 Rev. B
Troubleshooting
6-3
