Xerox 721 Message Manual - page 246
4635 LPS ADDITIONAL MESSAGES
Messages 544 through 574
Messages 544 through 574 are the result of
problems/warnings/status that could occur during the processing
of messages and signals/interrupts from the system controller
(ESS) or during the sending of commands to the system
controller.
544
Signal expected but not received
The PC user interface was expecting to receive signal data.
Action
Select the OK header button to retry the process. If the problem
persists, call Xerox Customer Service.
545
Protocol Error
An incomplete or damaged protocol packet was received.
Action
Select the OK header button to retry the process. If the problem
persists, call Xerox Customer Service.
546
Queue has no entries
PC user interface integrity problem. It has received a signal, but
the data was not found in the queue.
Action
Select the OK header button to retry the process. If the problem
persists, call Xerox Customer Service.
547
Second NAK detected
Two consecutive attempts to send a packet of data to the system
controller have failed. The transmission is lost.
Action
Select the OK header button to retry the process. If the problem
persists, call Xerox Customer Service.
550
Can’t get communications state
The call to GetCommState failed.
Action
1. Ensure no other Microsoft Windows applications using the
communication ports are running.
2. Select the OK header button to retry the process. If the
problem persists, call Xerox Customer Service.
551
Can’t open communications device
The requested communications port was unavailable.
Action
1. Ensure no other Microsoft Windows applications using the
communication ports are running.
2. Ensure COM port is properly configured.
3. Select the OK header button to retry the process. If the
problem persists, call Xerox Customer Service.
XEROX 4635 LASER PRINTING SYSTEM MESSAGE GUIDE
15-3