Hardware Tests; Lcd Test; Button Test - Lexmark T520 - 20ppm 8MB Par USB Pcl6 Ps3 Ppds Service Manual

4520-xxx

Hardware Tests

Select the following Hardware Tests from this menu:
•

LCD Test

•

Button Test

•
DRAM Memory Test
•
ROM Memory Test
•
Parallel Wrap (if available)
•
Serial Wrap (if available)
•
Serial 1 Wrap (if available)
•
Serial 3 Wrap (if available)
LCD Test
To run the LCD Test:
1. Select LCD Test from the Diagnostic menu. The LCD test
continually executes the LCD display test.
2. Press Return/Stop to cancel the test.
Button Test
To run the Button Test:
1. Select Button Test from the Diagnostic menu. With no buttons
pressed, several OP (Open) appear on the display.
2. Press each button one at a time and a CL (Closed) displays in
place of an OP. The proper operation of each button can be
checked.
3. Press Return/Stop to cancel the test.
Diagnostic Aids
3-11