Action Yes No
Step 3
Check the pogo pin contacts for damage, and replace if necessary.
Does the problem remain?
Go to step 4. The problem is
solved.
Step 4
Check the pogo pin contacts for dust or debris.
Are the contacts free of dust or debris?
Go to step 6. Go to step 5.
Step 5
Remove the dust or debris.
Does the problem remain?
Go to step 6. The problem is
solved.
Step 6
Replace the imaging kit.
Does the problem remain?
Go to step 7. The problem is
solved.
Step 7
a Enter the Diagnostics menu, and then navigate to:
Printer diagnostics & adjustments > Sensor tests
b Find the sensor (Toner meter).
Does the sensor status change while toggling the sensor?
Go to step 9. Go to step 8.
Step 8
Replace the TMC card. See
“TMC card removal” on page 369.
Does the problem remain?
Go to step 9. The problem is
solved.
Step 9
Replace the controller board. See
“Controller board removal” on
page 409.
Does the problem remain?
Contact the next
level of support.
The problem is
solved.
7528
Diagnostic information
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