Troubleshooting Display Messages - IBM 6400 series Maintenance Manual

Troubleshooting Display Messages

DANGER:
<3> Hazardous voltages are present in the printer with the power cord
connected to the power source. Switch off printer power and unplug the
printer power cord before proceeding.
<4> Do not connect or disconnect any communication port, teleport,
attachment connector, or power cord during an electrical storm.
<5> Power off the printer and disconnect the power cord before connecting
or disconnecting communication port, teleport, or attachment cable
connector.
If a fault condition occurs in the printer, four things happen:
The Attention indicator on the operator panel flashes on and off.
If enabled, the audible alarm sounds. (Press Stop to silence the alarm.)
A message describing the fault condition appears on the LCD.
Certain Unit Check conditions (see below) are automatically recorded in
the error log. The error log is a buffer in NVRAM that stores up to 50
messages as a list. The most recent message is stored at the top of the
list, the oldest message at the bottom of the list. If more than 50
messages occur before the log is cleared, the oldest messages are
deleted, so the log never contains more than 50 messages. You can print
the error log and clear it. (See page 135.)
The LCD displays two kinds of printer conditions:
An Attention condition halts printing until the operator replenishes
supplies, clears paper jams, corrects a problem of communication
between the printer and host computer, etc.
A Unit Check condition is a failure detected by self-test and fault circuitry.
Unit check conditions are either recoverable or unrecoverable .
Troubleshooting 57