Button And Lcd Test; Button Check - Canon PIXMA MG5220 Service Manual

(4) Button and LCD test

Confirm the operation after replacement of the panel board or LCD.

1) Button check

1-1) Click Panel Check of the Service Tool. All the LED's on the machine turn on and the LCD turns blue,
waiting for a button to be pressed.
1-2) Press each button of the operation panel, to see if every button functions properly.
1-3) The LCD is divided into 24 segments, representing each button. The color of a segment corresponding to
the pressed button changes to red. If 2 or more buttons are pressed at the same time, only one of them is
considered to be pressed, and the other buttons are ignored.
1-4) Press the OK button. The machine becomes ready for the next operation.
2) Scroll Wheel check
2-1) Rotate the Scroll Wheel clockwise step by step. The LCD is divided into 6 segments, representing each
step. The color of a segment corresponding to the step changes from red to green. If the wheel is rotated
counterclockwise before clockwise round completes, the color of segment(s) corresponding to the number
of steps the wheel is rotated counterclockwise returns to red. If the wheel keeps rotated clockwise over 1
round (6 steps), the color of segment(s) corresponding to the extra number of steps returns to red, starting
with the "Start" segment in the figure below.
2-2) When the Scroll Wheel is rotated clockwise 1 round (6 steps), press the OK button.
2-3) Rotate the Scroll Wheel counterclockwise step by step. The LCD is divided into 6 segments, representing
each step. The color of a segment corresponding to the step changes from green to blue. If the wheel is
rotated clockwise before counterclockwise round completes, the color of segment(s) corresponding to the
number of steps the wheel is rotated clockwise returns to green. If the wheel keeps rotated
counterclockwise over 1 round (6 steps), the color of segment(s) corresponding to the extra number of
steps returns to green, starting with the "Start" segment in the figure below.
1. ON button
2. Back button
3. OK button
4. up cursor button
5. down cursor button
6. left cursor button
7. right cursor button
8. Black button
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9. Color button
10. Stop button
11. HOME button
12. left function button
13. center function button
14. right function button
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