Service manual
SC Tables
SM 6-19 D127/D128
Trouble –
shooting
No.
Definition
Symptom Possible Cause
672 B
Controller-to-operation panel communication error at startup
After powering on the machine,
communication between the
controller and operation panel does
not begin, or the communication is
interrupted after a normal startup.
Controller stalled
Controller board installed
incorrectly
Defective controller board
Operation panel connector loose
or defective
Poor connection of DIMM and
optional boards on the controller
board
1. Check the setting of SP5875-001.
If the setting is set to "1 (OFF)",
change it to "0 (ON)".