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8-5Routine Service & Diagnostics
Printer Self-Tests
The
printer contains several self-tests that are helpful in evaluating and maintaining optimum
printer performance. Each of these tests may be initiated from the DIAGNOSTICS/
PRINTER
TEST 8 INCH WIDTH or DIA
GNOSTICS/PRINTER TEST FULL WIDTH con
Ć
figuration menus. Self-tests may periodically halt shuttle activity for long time intervals.
Available self-tests are as follows:
n
Shift R
ecycle
n All E's
n E's plus TOF
n
All H's
n
Underline Only
n Black Plot
n
Shuttle / Ribbon
n
Demonstration T
est
Shift Recycle - a sliding" alphanumeric pattern useful in identifying missing or malformed
characters,
improper vertical alignment, or vertical compression.
All
E's
- a pattern
of all uppercase letter E's useful in identifying missing characters, misplaced
dots, smeared characters, improper registration of left and right moving strokes (phasing), or
light/dark
character variations.
E's plus TOF - a pattern of all E's followed by a form feed to the next page top-of-form,
useful
in identifying high speed paper motion feeding problems.
All
H's
- a pattern of all uppercase letter H's useful in detecting missing characters,
misplaced
dots,
smeared characters, or improper phasing.
Underline
Only
- an underline pattern useful in identifying vertical hammer tip misalignment.
Black
Plot
- all odd dot positions are
printed and followed by periodic pauses in shuttle activ
Ć
ity.
This is useful for identifying horizontal hammer tip misalignment.
Shuttle / Ribbon - a test that verifies proper operation by exercising shuttle and ribbon moĆ
tion.
This is useful for identifying spooling and ribbon guide misalignment.
Demonstration Test
- a test of all print attributes.
Running the Self-Tests
To
run the self-tests, 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 either PRINTER
TEST
FULL WIDTH or PRINTER TEST 8 INCH WIDTH message is displayed.