Service Call Conditions 
M018/M019 3-8 SM Appendix 
 
Laser Synchronizing Detection Error: [K]/[Y] 
220 
The laser synchronizing detection signal for LDB [K]/[Y] is not output after the LDB 
unit has turned on while the polygon motor is rotating normally. 
Laser Synchronizing Detection Error: [M]/[C] 
The laser synchronizing detection signal for LDB [M]/[C] is not output after the 
LDB unit has turned on while the polygon motor is rotating normally. 
222 
  Disconnected cable from the laser synchronizing detection unit or defective 
connection 
  Defective laser synchronizing detector 
 Defective LDB  
 Defective EGB 
1.  Check the connectors. 
2.  Replace the laser optics unit. 
3. Replace the EGB. 
 
LD error 
The IPU (EGB) detects a problem at the LD unit. 
240 
 Worn-out LD 
  Disconnected or broken harness of the LD. 
1.  Replace the laser optics unit. 
 
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