Diagnostic Aids; Power-On Self Test Sequence - Lexmark C920 Service Manual

3. Diagnostic aids

Note: When troubleshooting, or prior to making any adjustment to print quality, always be sure:
•
The printer is installed on a level, rigid surface.
•
The photodevelopers are never exchanged. Do not exchange a black photodeveloper for a color
photodeveloper, as they have different surface phase counts.
•
Radar Page is always used when adjusting print registration.

Power-On Self Test sequence

1.
Power on.
2.
Printer and RIP controller check:
•
ROM and RAM
•
Fuser thermistor
3.
Printer hardware check:
•
Paper jam
•
Printer cartridge unit
•
Toner supply
•
Paper cassette present
4.
Fuser temperature check. Temperature regulated.
5.
Ready:
•
Printer controller
•
RIP controller
•
Printer condition
•
Motor/Fan
•
Heater
6.
DC motor drive 1
7.
Feeding paper
8.
Print
9.
Stepper motor drive 2
10.
Paper exit
11.
Stop
5056-XXX
3-1
Diagnostic aids