Lexmark C540 Service Manual - Page 64

Front door sensor or switches service check, 2xx, 4xx, Questions / actions, Base Sensor Test, Select

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5025-2xx, 4xx Front door sensor or switches service check Step Questions / actions Yes 1 Enter Diagnostics Menu (turn the printer off, press and hold and , turn the printer on, and then release the buttons when the installed memory and processor speed displays). Perform the Base Sensor Test. See "Base Sensor Test" on page 3-16. 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? Sensor, toner door, and right doors are OK. 2 Open the front door, and check the thin, tall, plastic 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? Replace the right cover assembly. See "Right cover assembly removal" on page 4-10. 3 Open the toner door, and inspect the vertical web that pushes and rotates the pivot plate. Is it damaged? 4 With the front cover open, inspect the two switches. 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? Replace the top cover assembly. See "Top cover assembly removal" on page 4-12. Replace the right cover assembly. See "Right cover assembly removal" on page 4-10. 5 Turn the printer off, and remove the rear shield. See "Rear shield removal" on page 4-11. Turn the printer on, and verify the following values at JINT1 and JCVR1: JINT1 JCVR1 Pin Value 1 +5 V dc 2 Ground Pin Value 1 +24 V dc Are the values approximately correct? Go to step 6. No Go to step 2. Go to step 3. Go to step 4. Go to step 5. Replace the controller board. See "Controller board removal" on page 4-19. 2-30 Service Manual

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2-30
Service Manual
5025-2xx, 4xx
Front door sensor or switches service check
Step
Questions / actions
Yes
No
1
Enter Diagnostics Menu (turn the printer off,
press and hold
and
, turn the printer on,
and then release the buttons when the
installed memory and processor speed
displays).
Perform the Base Sensor Test. See
“Base
Sensor Test” on page 3-16
.
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?
Sensor, toner door, and
right doors are OK.
Go to step 2.
2
Open the front door, and check the thin, tall,
plastic 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?
Replace the right cover
assembly. See
“Right
cover assembly removal”
on page 4-10
.
Go to step 3.
3
Open the toner door, and inspect the vertical
web that pushes and rotates the pivot plate.
Is it damaged?
Replace the top cover
assembly. See
“Top cover
assembly removal” on
page 4-12
.
Go to step 4.
4
With the front cover open, inspect the two
switches. 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?
Replace the right cover
assembly. See
“Right
cover assembly removal”
on page 4-10
.
Go to step 5.
5
Turn the printer off, and remove the rear
shield. See
“Rear shield removal” on
page 4-11
. Turn the printer on, and verify the
following values at JINT1 and JCVR1:
Are the values approximately correct?
Go to step 6.
Replace the controller
board. See
“Controller
board removal” on
page 4-19
.
JINT1
JCVR1
Pin
Value
Pin
Value
1
+5 V dc
1
+24 V dc
2
Ground