Lexmark C780 Service Manual - Page 107
error service check, Bin mailbox
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5061 990.01 error service check This error indicates which option is causing the error. 5-Bin mailbox Step Actions and questions 1 Mechanical linkage/DC motor assembly-Check the DC motor cable connector to make sure it is installed at J4 on the control board. Is the cable connected correctly? 2 Resistance check-Disconnect J4 from the option board, and check the resistance of the motor on the cable connector between J2-1 and J2-2. The resistance measures between 115 and 135 ohms. Is the resistance correct? 3 DC motor-Check between J2-1 and between J2-2 and the case of the DC motor for shorts. Is the DC motor shorted? Note: If the DC motor is shorted, damage may result to the control board. 4 Output expander control board check-Disconnect the motor cable J2, and check the voltages at J2 on the board. Warning: Be careful not to short to adjacent pins on the connector. The voltages measure: (Note: All voltages are approximate values.) J2-Motor cable (motor Idle) J2-1 +24 V dc J2-2 +24 V dc J2-3 +5 V dc J2-4 +5 V dc Are the voltages correct? Yes Go to step 2 Go to step 3 Replace the mechanical linkage/DC motor assembly. Replace the control board. No Reseat the cable, and recheck for correct operation of the option Replace the mechanical linkage/DC motor assembly. Go to step 4 Replace the mechanical linkage/DC motor assembly. Diagnostic information 2-65