Table of Contents
Advertisement
Chapter 5 — Troubleshooting and Maintaining the 6820
POST Error Codes (continued)
Long
Short
Paper
Beep
Beep
Out
1
5
On
1
5
On
0
0
On
Understanding Fatal Errors
84
Head
Low
Jam
Batt
Power Meaning
Off
On
On
On
Off
On
On
On
On
There are two types of fatal errors, flash write errors and EEPROM
configuration block errors. These errors are extremely rare, but measures
are built into the printer diagnostics to track possible occurrences.
Flash Write Errors
Errors related to writing or erasing flash are critical errors. These errors
cause the printer to stop all processing and produce an LED code and a
sequence of beeps. The LED code indicates the address of the segment
where the error occurred in octal notation.
The octal digit changes every four beeps until four octal digits are
output. Only four octal digits are output since blocks are 256 bytes in
size and flash can be addressed with a total of 0x7ff blocks. The segment
address output is the runtime address of the flash block and not the offset
of the block within flash.
To obtain the block offset within the flash
•
Subtract 0x800 from the address output to determine the block offset.
The printer suspends after the processing the error code. When the
printer resumes, an error again and the printer suspends again. Reset the
printer to correct the error. If a reset does not correct the error, have the
printer checked by a qualified service technician.
Note: Flash write errors may be unrecoverable.
Diagnostic flash memory check failed or is not
initialized
Diagnostic memory write failure
Control program IPL
6820 Series 80-Column Printer User's Manual
Advertisement
Table of Contents
Troubleshooting
