Front Door Sensor Or Switches Service Check - Lexmark X543 Service Manual

7525-xxx

Front door sensor or switches service check

Step Questions / actions
Enter Diagnostics Menu (turn the printer off, press
1
and hold and
release the buttons when the installed memory and
processor speed displays).
Perform the Base Sensor Test. See
Test" on page 3-18.
1. Select Base Sensor Test, and press Select
( ).
2. Select Front Door, and press Select (
3. Open and close the front door, and observe the
display.
Does the display indicate Value Closed with the door
closed and Value Opened with the door opened?
Open the front door and check the thin, tall, plastic
2
web (pivot plate) at the top right of the printer. With
the other covers in place and closed, this web
interacts with switches in the door.
Open the toner cover and check the motion of the
web. Is the web loose, damaged, or missing?
Open the toner door and inspect the vertical web that
3
pushes and rotates the pivot plate.
Is it damaged?
With the front cover open, inspect the two switches.
4
Using a tool, such as a spring hook, push the metal
arms to check the movement.
Is there any damage to the switches or the
surrounding area?
Turn the printer off, and remove the rear shield. See
5
"Rear shield removal" on page
printer on, and verify the following values at JINT1
and JCVR1:
JINT1
Pin Value
1 +5 V dc
2 Ground
Are the values approximately correct?
Close the front cover and the toner door. Be sure the
6
right cover is in place. Turn the printer off, and then
disconnect the cables at JINT1 and JCVR1. Test
continuity at the connector under the following
conditions:
• With front cover and toner door closed:
Test pin 1 and pin 3 at JINT1 cable end and pin 1
and pin 2 at JCVR1 cable end.
• With one or both doors open:
Pin 2 and 3 at JINT1 cable end should indicate
continuity, but Pin 1 and 2 at JCVR1 should have
no continuity.
Are the tests verified?
Service Manual
2-40
, turn the printer on, and then
"Base Sensor
).
4-7. Turn the
JCVR1
Pin Value
1 +24 V dc
Yes
Sensor, toner door, and Go to step 2.
right doors are OK.
Replace the right cover Go to step 3.
assembly. See"Right
cover removal" on
page 4-7.
Replace the top cover Go to step 4.
assembly. See
"Top
cover assembly
removal" on page 4-9.
Replace the right cover Go to step 5.
assembly. See"Right
cover removal" on
page 4-7.
Go to step 6. Replace the controller
board. See
board removal" on
page
Contact your next level Replace the front cover
of support. assembly. See
cover assembly
removal" on page
No
"Controller
4-18.
"Front
4-2.
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