8–5
Routine Service & Diagnostics
Hex Code Printout The
hex code printout (often called a “hex dump”) is useful for debugging when troubleshooting print
-
er data reception problems. Hex dumps list ASCII character data received from the host with the corre
-
sponding
two–digit hexadecimal code. Printable characters
print their assigned symbol; nonprintable
characters are indicated with a period symbol. A “p” before the hex code indicates an active Paper In
-
struction (PI) line; a blank space before the hex code indicates an inactive PI line. To print the data
stream received from the host computer in hex code with ASCII character equivalents, perform the
following
steps.
1. Place the printer off line and raise the printer cover.
2. Press
MENU DOWN; repeatedly press NEXT or PREV V
ALUE until DIAGNOSTICS is dis
-
played.
3. Press MENU DOWN, then repeatedly press NEXT or PREV VALUE until the PRINT DATA
STREAM
IN HEX CODE message displays.
4. Press MENU DOWN. The display shows OFFLINE HEX DUMP.
5. Press ON LINE. The display indicates that the printer is on line and in hex dump mode.
6. Send the data from the host. The hex dump prints.
7. Press ON LINE again to stop the hex dump. The display reads OFFLINE HEX DUMP.
8. Press CLEAR to return printer to OFFLINE READY.
9. Close printer cover and place the printer on line.
NOTE: Any data r
emaining in the buffer prints befor
e the hex code printout starts.
Fault Messages If
a fault condition occurs in the printer
, the CHECK light flashes alternately with the ON LINE indica
-
tor and the first line of the message display reads FAULT CONDITION. If configured, an alarm
sounds
when the fault condition occurs. The second line of the display shows
the specific fault. (If the
specific
fault description requires two lines, the message F
AULT CONDITION does not appear.)
NOTE: T
o turn the alarm off befor
e the fault is clear
ed. pr
ess the CLEAR switch.
Fault
messages, explanations, and corrective action are listed in T
able 8–1. Fault messages indicate the
nature
and location of user– and service–correctable faults. After correcting a user–correctable fault,
press CLEAR to resume printer operation.
Service
correctable faults are indicated on the message display by an asterisk (*) next to the fault mes
-
sage. If a fault message appears, first press the CLEAR switch. If the printer returns to OFFLINE
READY
after a few seconds, the fault message was a false indication, and printing can continue. If a
fault
occurs during a paper slew
, the paper motion is completed for all faults except paper jams. If the