Door Switch Service Check - Lexmark MB2236 Service Manual

Symptom
No display.
No power.
ADF door is open.

Door switch service check

Action
Step 1
a
Check the front door flag for damage.
b
Check the front door hinge for damage.
Is the front door flag and hinge free of damage?
Step 2
Replace the front door. See
Does the problem remain?
Step 3
a
Check the HVPS characterization.
b
Reseat the HVPS cables.
c
Check the HVPS cables for proper installation and damage.
d
Check the HVPS spring contact for proper connection to the
board.
e
Check the door switch for damage and proper alignment.
Is the HVPS properly installed and free of damage?
Step 4
Replace the HVPS. See
Note: Make sure to perform the HVPS characterization when
replacing the HVPS.
Does the problem remain?
Step 5
a
Reseat all the cables on the controller board.
b
Check the controller board for proper installation and damage.
c
Check if controller board LED lights up.
Is the controller board properly installed and free of damage?
Step 6
Replace the controller board. See
page 228.
Does the problem remain?
Action
See "No display service check" on page
See "No power service check" on page
See "ADF door open service check" on page
"Front door removal" on page
"HVPS removal" on page
"Controller board removal" on
Diagnostics and troubleshooting
Yes
Go to step 3.
Go to step 3.
241.
Go to step 5.
Go to step 5.
231.
Contact the next
level of support.
Contact the next
level of support.
178
3400-48x
185.
186.
187.
No
Go to step 2.
The problem is
solved.
Go to step 4.
The problem is
solved.
Go to step 6.
The problem is
solved.