Service manual

Performance Verification
2-11
How to Read the Extended Self-Test Report
Each printed page of the extended self-test contains the following information:
A Test Results - See the previous section.
B Character Set - Characters 0 through 255 are printed as a table 4x64 characters in
size. This checks the character tables and printhead performance.
C Timing Tics - Vertical lines are drawn from the bottom of the page. Each vertical
line is 25 mm long as measured from the horizontal line drawn across the bottom of
the page. Spacing between timing ticks is 25 mm ± 1.5%.
D Diagonal Lines - These dense diagonal lines are printed across the top 2 inches of
the report and quickly show speed variations. An 8 cm wide column of diagonal
lines is also printed down the left-hand side of the report, starting at the top-of-form
hole, to show whether the print roller is round.
E Stepped Bars - The stepped bars are 1/4-inch thick and 3/4-inch tall, stepping from
the top of the page to the bottom of the page. These bars are used to show printhead
dots that are burned out.
F Software Revision - The software revision number for the base ROM.
G Printer Speed - mm/sec
H Printhead Voltage - Voltage range is 25.6 to 26.6 V
I Printhead Temperature - degrees Celsius.
J Battery Voltage - Voltage range is 5.2 - 7.5 V.
K Time Stamp - Number of seconds that the printer test has run.
L Last Error - The last error code encountered. An error code of 65535 indicates that
no errors have occurred since the instrument left the factory. See Table 4-1 for the
table of error codes.
M Event Log - List of the last 46 events with time and date stamp. The events are listed
with the most recent first. Event sub-codes have the same time stamp as the event
code, and appear on the line above the event code. See Table 4-2 for a table of event
codes.