Lexmark 16C0365 - 5500 MFP, Service Manual

Page: 21 / 88

Diagnostic information
2-7
4036-402
Scan module does not move to the home position
Scan module does not move to the flatbed position
System hangs while booting or displays erratic behavior
Cause Relevant unit Check Action
Home position sensor—
main scanner card
connection failure None Visual check Connect the connector.
Home position sensor
failure Sensor in the flatbed
optical unit Visual check Replace the flatbed optical unit.
Power supply—main
scanner card connection
failure None Visual check Connect the connector.
Power supply fails Power supply Test LVPS (+5V,
+24V, GND) Replace the power supply.
Lamp failure Lamp Visual check Replace the flatbed lamp.
Inverter failure Inverter Visual check Replace the flatbed lamp inverter.
Flatbed optical unit—
main scanner card
connection failure None Visual check Connect the connector.
CCD card fails Flatbed optical unit Visual check Replace the flatbed optical unit.
Cause Relevant unit Check Action
Power supply.—-main
scanner card connection
failure None Visual check Connect the connector.
Power supply fails Power supply Test LVPS (+5V,
+24V, GND) Replace the power supply.
Motor—main scanner
card connection failure None Visual check Connect the connector.
Motor failure Carrier motor Visual check Replace the flatbed optical unit.
Belt broken or loose Carrier belt Visual check Reposition belt or replace if
defective.
Cause Relevant unit Check Action
Corrupt software on hard
disk drive Hard disk drive Visual check Refresh the hard disk drive
software. See
“Hard disk drive
refresh” on page 3-4 .