Symptom Action
No display. See
“No display service check” on page 185.
No power. See
“No power service check” on page 186.
ADF door is open. See
“ADF door open service check” on page 187.
Door switch service check
Action Yes No
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?
Go to step 3. Go to step 2.
Step 2
Replace the front door. See
“Front door removal” on page 241.
Does the problem remain?
Go to step 3. The problem is
solved.
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?
Go to step 5. Go to step 4.
Step 4
Replace the HVPS. See
“HVPS removal” on page 231.
Note: Make sure to perform the HVPS characterization when
replacing the HVPS.
Does the problem remain?
Go to step 5. The problem is
solved.
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?
Contact the next
level of support.
Go to step 6.
Step 6
Replace the controller board. See
“Controller board removal” on
page 228.
Does the problem remain?
Contact the next
level of support.
The problem is
solved.
3400-48x
Diagnostics and troubleshooting
178
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