Lexmark T650 Series - Page 153

Diagnostic information 2-117
4062
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990.54 HCIT tray lift motor
lost encoder failure
The HCIT tray lift motor is not
reporting pulses back to the
engine.
1. Check for obstruction in the
HCIT tray lift area.
2. Check the connections on
the HCIT tray lift motor
assembly for proper
connection.
3. Replace the HCIT tray lift
drive motor assembly if
problem remains. Go to “High
capacity input tray (HCIT)
tray lift drive motor assembly
removal” on page 4-125
990.90 Sensor connection
failure
Hardware error (sensors are
not plugged on the board)
Replace all connections on the
system card assembly.
991.00 System card failure Device system card failed
basic assurance test.
Replace the system card
assembly.
Go to “System card
assembly removal” on
page 4-75.
991.05 Checksum failure Bad checksum Replace the system card
assembly.
Go to “System card
assembly removal” on
page 4-75.
Error
code or
message
Error contents Description/Action Possible repair actions