Service manual

7-19
CHAPTER 7 TROUBLESHOOTING PROCEDURES
Note! When the PU PCB(PRN PCB) is replaced, first read the data of the EEPROM chip of the
old PCB, and then, copy it to the new PCB after the replacement. (See page 5-40 "Precautions
on the replacement of engine control PCB").
(14)LED head is not recognized(Error 131,132,133,134) ............................................. 7-53
(14-1)Service Call 131-134(LED HEAD Missing) ................................................... 7-53
(15)Toner cartridge is not recognized(Error 540,541,542,543) .................................... 7-54
(15-1)Errors caused by consumables..................................................................... 7-54
(15-2)Errors caused by toner sensor ...................................................................... 7-54
(15-3)Errors caused by machine defects................................................................ 7-55
(16)Fuse Cutout Error (Error 150-155) ......................................................................... 7-55
(16-1)Fuse cutout errors ......................................................................................... 7-55
(17)Dew Condensation Errors (Error 123) .................................................................... 7-56
(17-1)Dew Condensation........................................................................................ 7-56