Remedy: Indicates that the download emulation is outdated. Time stamps indicate that the download emulation and controller code are incompatible. • Disable the download emulation. • Program the download emulation into the code overlay SIMM. • If the above steps do not fix the problem, replace the code overlay SIMM and re-download the emulation.
Code: 975
Description: Network Card X
Remedy: Indicates that a failure has occurred with the network card installed in slot x (x=1, 2 or 3).
Remedy: Indicates that a bad checksum has been detected while programming network card x. Replace network card x.
Code: 979
Description: Network Card X
Remedy: Indicates that flash parts failed while programming network card x. If this is a network model printer, replace the controller board.
Code: 990
Description: Coupling Operation Error
Remedy: A 990 Service Engine Error. The coupling does not turn. 1 Coupling Motor Cable MK2 Engine Board Disconnect the coupling motor at the inline connector and measure the resistance of the motor on the motor connector. It should measure between 9 and 15 ohms. If incorrect, replace the motor. The motor may be binding due to a problem in the motor mounting stay assembly. Remove the stay assembly and check for problems with the motor and coupling unit. Repair as necessary. If no problem is found and the motor does not turn, check cable MK2. • If incorrect, replace the cable. • If correct, replace the engine board. B 990 Service Engine Error - Motor turns. 1 Motor Mounting Stay A Assembly Coupling parts Check the parts associated with the coupling operation for signs of excessive wear, breakage or looseness. Check the coupling arm, coupling shaft and cam. • If a problem exists, repair or replace the complete motor mounting stay A assembly. • If no problem is found with the stay A assembly, check the detent arm, detent spring, coupling arm and coupling shaft for signs of binding, wear, breakage or looseness. Repair as necessary.