Symptoms - Lexmark CS720 Service Manual

Symptoms

Base printer symptoms
Symptom
Printer has no power.
Control panel not functioning.
False values for the front door appear on the
display.
NFC communications failure.
Toner out displays.
Printer not communicating with host (USB).
Printer not communicating with host
(network).
Paper jam in the output bin.
Control panel service check
Action
Step 1
Reset the printer.
Does the problem remain?
Step 2
Check the blue LED on the control panel.
Is the LED on?
Step 3
Check the Ethernet and controller board LEDs on the control panel.
Are the LEDs on?
Step 4
Check the ribbon cable connection on the control panel and
controller board.
Is the cable properly connected at both ends?
Step 5
Reconnect the cable.
Does the problem remain?
Action
See "Dead machine service check" on page
See "Control panel service check" on page
See "Interlock switch service check" on page
See "Mobile solutions module NFC service check" on page
See "Toner meter cycle (TMC) card service check" on page
See "USB service check" on page
See "Network service check" on page
See "Sensor (output bin full) static jam service check" on page
Diagnostic information
223
226.
223.
224.
233.
229.
Yes No
Go to step 2. The problem is
solved.
Go to step 3. Go to step 4.
Go to step 4. Go to step 9.
Go to step 6. Go to step 5.
Go to step 6. The problem is
solved.
5028
228.
232.
84.