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Routine Service & Diagnostics8-6
4. To
select one of the 8 INCH WIDTH or FULL WIDTH paper tests, press MENU DOWN
then repeatedly press NEXT or PREV until the appropriate test is displayed. Tests inĆ
clude
shift recycle, all Es, and others.
5. P
ress RUN/STOP to begin the selected self-test; press RUN/STOP again to stop it.
NOTE
: Any data remaining in the buffer will be printed before the self-test begins.
Examine
the print quality. The characters should be horizontally and vertically aligned and cor
Ć
rectly
formed. If print quality problems exist, contact your authorized service representative.
6. P
ress CLEAR to place the printer off line. The display will read OFFLINE READ
Y.
7.
Close printer cover and place the printer on line.
Fault Messages
Fault
messages and their explanations are listed in T
able 8-1. F
ault messages indicate the na
Ć
ture
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
message. If a fault message appears, first press the
CLEAR switch. If the printer returns to
OFFLINE
READ
Y after a few seconds, the fault message was a false indication, and printing
may
be continued. If a fault occurs during a paper slew, the paper motion will complete for all
faults.
If the fault message re-appears after pressing CLEAR, turn the printer off and contact
your
authorized service representative.
Hex Code Printout
The hex code printout (often called a hex dump") are useful for debugging when
troubleshooting printer data reception problems. Hex dumps list ASCII character data reĆ
ceived
from the host with
the corresponding two-digit hexadecimal code. P
rintable characters
print
their assigned symbol; nonprintable characters are indicated with a period
symbol. A p"
before
the hex code indicates an active P
aper Instruction (PI) line; a blank space before the hex
code
indicates an inactive PI line. T
o print the data stream received from the
host computer in
hex
code with A
SCII 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 until DIAGNOSTICS is disĆ
played.
3. Press MENU DOWN, then repeatedly press NEXT or PREV until the PRINT DATA
STREAM
IN HEX CODE message is displayed.
4. P
ress MENU DOWN; the display will show OFFLINE HEX DUMP
.
5. Press
ON LINE.
The display will indicate that the printer is on line and in hex dump mode.