IBM 6400 Maintenance Information Manual page 72

Chapter 5
Troubleshooting Display Messages
Operator Panel
Message
025 SERIAL FRAMING
ERROR
VERIFY
CONFIGURATION
026 HEX DUMP MODE
027
COMMUNICATIONS
CHECK
CALL SYSTEM
OPERATOR
028
COMMUNICATIONS
CHECK
CALL SYSTEM
OPERATOR
029 8344 DIAGNOSTIC
TEST FAILED
72
Table 4. Message List
Explanation
The printed output 1. Make a configuration printout. Verify that
may contain random !
(exclamation point)
characters.
2. Send a print job to the printer. If the
Printer attach status No action required.
message.
Enable poll timeout. Power off the printer. Disconnect the AC
The printer was not power cord from the printer. Check data cable
enabled for one connection and host system. (Refer to line
minute over a coax problem determination procedures, as
interface recommended by the host system.)
Poll timeout error. Power off the printer. Disconnect the AC
The printer was not power cord from the printer. Check data cable
polled for one minute connection and host system. (Refer to line
over a coax interface. problem determination procedures, as
recommended by the host system.)
Link-level code test 1. Cycle power. Run the print job again. If
detects a hardware
failure on the coax/
twinax expansion
2. Cycle power. Run the print job again. If
board. This message
can also occur if the
software in flash
memory is corrupted.
Corrective Action
the printer matches host configuration
settings for Data Protocol, Baud Rate,
Data Bits, Stop Bits, Parity, Data
Terminal Ready, and Request to Send.
Set printer serial interface parameters to
match those of the host.
message appears, go to
Communications Failures, page 131.
the message appears, download the
emulation software again.
the message appears, replace the coax/
twinax expansion board. Record the
message and return it with defective
board.