Diagnostic information 2-37
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 3-18.
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?
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 removal” on
page 4-7.
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 4-9.
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 removal” on
page 4-7.
Go to step 5.
5
Turn the printer off, and remove the rear shield. See
“Rear shield removal” on page 4-7. 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 4-18.
6
Close the front cover and the toner door. Be sure the
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?
Contact your next level
of support.
Replace the front cover
assembly. See “Front
cover assembly
removal” on page 4-2.
JINT1 JCVR1
Pin Value Pin Value
1 +5 V dc 1 +24 V dc
2 Ground
Y112730-2
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