Lexmark T652 Service Manual - Page 159
Lexmark T652 Manual
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4062 Error code or message 990.54 Error contents Description/Action Possible repair actions 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 4-125 990.90 991.00 Sensor connection failure System card failure Hardware error (sensors are not plugged on the board) Device system card failed basic assurance test. Replace all connections on the system card assembly. Replace the system card assembly. Go to "System card assembly removal (T650, T652, T654, T656)" on page 4-76. 991.05 Checksum failure Bad checksum Replace the system card assembly. Go to "System card assembly removal (T650, T652, T654, T656)" on page 4-76. Diagnostic information 2-125
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