Service manual

Service Call Conditions
M052/M053/M054 6-16 SM
687 D Memory address (PER) command error
The BICU did not receive a memory address command from the controller
with the prescribed time once the paper reached the registration sensor.
 Harness connection at BICU, Controller board loose or broken
 Defective BICU
 Defective Controller Board
688 D Print request (PRREQ) command error
The BICU did not receive a print request command from the controller with
the prescribed time once the paper reached the registration sensor.
 Harness connection at BICU, Controller board loose or broken
 Defective BICU
 Defective Controller Board
690 D GAVD communication error
GAVD error is detected after turning on the machine or recovering from
the energy save mode.
 Defective BICU