Xerox Phaser 840, Руководство по обслуживанию

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4 - 138 Phaser 840/850/860/8200 Color Printer - Service Manual
Locking the printhead
During normal power-down, the printer tilts the printhead back and energizes the x-axis
drive to move the printhead to the far right. This allows the printhead’s tilt arm, which
moves as the printhead moves, to engage a pin protruding from the left-side printer frame.
This effectively automatically locks the printhead in place for moving and shipping. The
printer will not lock the printhead if any printer door is open.
Caution
After servicing the printer with power off, never leave the
printhead in the tilted-forward, far-right position. Upon
power-up, the printhead will be tilted backward and the head tilt
arm will crash into the head lock pin. This can damage process
gears and belts driving the tilt arm.
After servicing the printer.
When you service the printhead, x-axis drive,
cap/wipe/purge assembly or other relevant printer components, leave the printhead in its
print position, centered in front of the drum. Upon power-up the printer can safely move
the printhead.
Manually locking the printhead.
If you must manually lock the printhead:
1.
With the printer powered off, carefully tilt the printhead back about two-thirds of the
way by rotating the compound gear. Do not allow the spring-loaded printhead to fall
forward or it may damage the drum.
2.
Manually rotate the X-axis drive gear, to move the printhead to the extreme right of its
travel. Ensure the lock pin on the left side of the printer frame properly engages the
slot in the head tilt arm.
3.
Rotate the x-axis gear in the opposite direction (about 1 rotation). This prevents the
x-axis drive from binding so tightly that the motor cannot free it upon power-up.
4.
Reverse these steps to unlock the printhead.