Instruction manual

MERLIN LEGEND Communications System Release 5.0
Maintenance and Troubleshooting
555-650-140
Issue 1
June 1997
Control Unit Problems
Page 4-29
Processor Problems
Power Cycle During Installation
The system automatically begins the installation procedure again. If the power
source is unreliable, it is possible for the installation procedure to retry
indefinitely. See ‘‘Power Supply Problems’’
or Chapter 2 of Installation for
details on providing a reliable power source.
Removal of Memory Card During Installation
The system is in an indeterminate state. Re-initiate the forced installation by
power-cycling the system after inserting the memory card.
Incompatible Releases
If releases are incompatible, see System Programming and Maintenance (SPM)
for instructions on converting the system programming before upgrading to the
new release.
!
CAUTION:
If releases are incompatible, pressing the hidden key deletes
existing programming. Before pressing the hidden key, make a
backup of the system programming. Use SPM or a PCMCIA
translation card.
Console Display/Instructions Additional Information PC
If the releases are incompatible, the following screen appears.
See SPM for instructions on converting the system programming before
upgrading to the new release.
Upgrade:
MemCard Rel: 4.y Vnn.mm
Current Rel: 4.y Vnn.mm
Incompatible releases.
Pressing hidden key two times
Exit
deletes existing program.