Tektronix Phaser 340 Service Manual page 128

6
Troubleshooting
6-2 Phaser 340 Color Printer
If the printhead is in the cap/wipe/purge position:
a. The heaters in the printhead and cap/wipe/purge assembly are
activated to melt the ink "gluing" them together.
b. The printhead is tilted back.
c. The ink is allowed to drain from the cap/wipe/purge assembly.
d. The cap/wipe/purge assembly is lowered to its home position.
e. A short wipe is performed and the cap/wipe/purge assembly is
returned to its home position.
f. The process motor is rotated to tilt the printhead forward (if not
already forward), rotate all the rollers to their ready positions,
disengage the transfix roller, and lower the maintenance tray
blade and wiper.
g. The printhead is moved to its X-axis home position and then
centered.
If the printhead is in the print position but the cap/wipe/purge
assembly is in some unknown intermediate position:
a. If the cap/wipe/purge assembly is not detected in its home
position, then the heaters in the printhead and cap/wipe/purge
assembly are activated in case the printhead and cap/wipe/purge
may be "glued" together by cooled ink.
b. The cap/wipe/purge assembly is lowered to its home position.
c. The process motor is rotated to tilt the printhead forward (if not
already forward), rotate all the rollers to their ready positions,
disengage the transfix roller, and lower the maintenance tray
blade and wiper.
d. The printhead is moved to its X-axis home position and then
centered.
e. A short wipe is performed and the cap/wipe/purge assembly is
returned to its home position.
5. The printer energizes the process axis and y-axis motors eight times at
different current levels to determine at which point they "stall out,"
these values are stored in NVRAM and are used to determine when
abnormal events occur, such as double-picks or jams that stall the
motors.
6. The printhead is tilted back to the locked position.
7. The front panel displays a warm up message.