Printronix L1024 Maintenance Manual page 179

If an error occurs during the Data Controller Board power-up self-test, the initialization sequence will stop,
and the board will report an error. The board reports the error by beeping the speaker, flashing L1, and
flashing L2, all in unison, to signal the error code. The error code will be signalled repeatedly, as long as
power to the Data Controller Board remains on. Table 9–2 lists the beep and LED error codes.
Table 9–2. Data Controller Board Beep and Diagnostic LED Error Codes
Diagnostic Status
ROM Checksum Test—Fail
DRAM—Bank 1 Failure
DRAM—Bank 2 Failure
DRAM—Bank 3 Failure
DRAM—Bank 4 Failure
Vector Interrupt Test—Fail
Autovector Interrupt—Fail
Front Panel Presence—Fail
Front Panel LCD Pattern Test
Key:
= L1, L2, and the Beep are all on together for 500 msec.
= Pause for 2 sec.
Chapter 9 – Controllers and Floppy Disk Drives
LED Flash/Beep Pattern
Visual Detection
LCD Message Displayed
None
None
None
None
None
None
None
Not Applicable
RUNNING SELF TEST ....
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