Lexmark Optra C Service Manual - Page 58
Error (143) 5 V / 24 V Supply Failure, Error (144) Temperature/Humidity Sensor Failure
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5045-001 Error (143) 5 V / 24 V Supply Failure FRU 1 Power supply unit (low voltage) DC controller PCB Action Check the connections on the DC controller PCB connector J101 and power supply unit connector J4. Replace and check as follows: 1. Power supply unit. 2. DC controller PCB see "DC Controller Board Information" on page 2-2. Error (144) Temperature/Humidity Sensor Failure FRU Action 1 Temperature/ Check the connections on the temperature/humidity humidity sensor sensor unit connector J73, connector J15, and unit mechanical controller PCB connector J2005. Replace and check as follows: Mechanical controller PCB 1. Temperature/humidity sensor unit. 2. Mechanical controller PCB. DC controller 3. DC controller PCB, see "DC Controller Board PCB Information" on page 2-2. Error (145) Density Sensor Failure FRU 1 Density sensor unit / cable DC controller PCB Action Check the connections on the density sensor unit PCB connector J501 and DC controller PCB connector J103. Replace and check as follows: 1. Cable. 2. Density sensor unit. 3. DC controller PCB, see "DC Controller Board Information" on page 2-2. 2-26