Power-On Self Test (Post) - Lexmark Optra C Service Manual

5045-001

Power-On Self Test (POST)

When you turn the printer on, it performs a Power-On Self Test
(POST). Check for correct POST functioning by observing the
following:
1. All Operator Panel segments turn on from the top row down
then clear.
2. Diamonds fill the display and then clear.
3. The Fuser Lamps and Fans turn on and "Performing Self Test"
appears on the display.
Note: If there is a fault with the printer, the machine will termi-
nate the POST within 10 seconds, the machine beeps, and the
Error Code will be displayed within 35 seconds.
4. The Developing Rotary Assembly Drive Motor turns on and
rotates the assembly to the first homing position.
5. The Developing Rotary Assembly is indexed one position at a
time looking for missing cartridges. If a cartridge is missing, the
Developing Rotary Assembly stops at that position and prompts
the operator to load the cartridge, POST continues.
6. The Main Drive Motor turns on and drives the Fuser Exit
mechanism (depending upon the temperature of the Fuser).
7. The Transfer Drum Drive Motor is energized, the Transfer Drum
Engagement and Cleaning Brush Engagement solenoids pick
within 10 seconds, and 5 seconds later, the Cleaning Brush
Motor is energized.
8. The Display reads "Busy".
9. Each Cartridge in turn is pressed into the development position,
stirred and checked for low toner.
10. The Laser Scan Motor is energized.
11. Each cartridge in turn is indexed into the development position,
and pressed against the PC.
12. Each cartridge (starting with Magenta) lays down a series of
small (< 1 ") squares of toner directly on the Transfer Drum for
calibration purposes. These patches start at MAXIMUM density
and drop to half tones. The black patches are laid down on the
white portion of the drum.
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