Lexmark C520 Series, Service Manual

Page: 62 / 259

2-4
Service Manual
5022- xxx
Power-on self test (POST) sequence
When you turn the printer on, it performs a Power-On Self Test. Check for correct POST functioning of the base
printer by observing the following:
1.
The LED turns on.
2.
The operator panel turns on.
3.
A partial row of pixels appears.
4.
The operator panel display clears.
5.
Another row of pixels appears.
6.
The operator panel display clears again.
7.
The operator panel displays system information. For example:
8.
The fuser lamp turns on. The fuser takes longer to warm up from a cold start than a warm start.
9.
The operator panel LED starts blinking.
10.
A clock face appears on the display.
The following errors or messages may appear:
•
Close Door
or
Insert Cartridge
display if the upper front cover is open or the print cartridge is
missing.
•
Any cartridge errors, such as
Defective Cartridge
or
Missing Cartridge
.
11.
Ready
appears on the display.
12.
The main fan turns on.
13.
The main drive motor turns on.
14.
The EP drive assembly drives the developer shaft located in the toner cartridge.
15.
The exit rollers turn.
16.
The printer calibrates.
*128MB 500Mhz