32 – Control panel messages
EN
All Printers
• A toner cartridge is not installed or the cartridge is not fully seated.
• The sensitivity tabs are missing (except 4 Plus, LJ 4, and 2686).
Replace the toner cartridge.
4V
• The toner cartridge microswitch (SW501) on the high-voltage PCA
is defective.
• The front-door-open sensor flag sensor is malfunctioning. PS402 is
located on the small Front Door Unit Terminal PCA, on the front door
under the transfer roller.
• The DC controller PCA is defective.
4 Plus, 4
• The toner cartridge is defective.
• The HVPS is defective or there are dirty or misaligned contacts.
4Si, IIISi
• Check the tabs on the right side of the toner cartridge. At least one
of the two tabs must be present.
• The support tab of the switch actuator, which is located on the
upper-right corner of the DC controller, is bent or installed
incorrectly.
• The HVPS is defective.
IIID, III, IID, II
• The paper control PCA is defective.
2686A/D
• The cassette microswitch is defective.
14 No EP Cartridge or No Toner Cartridge
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