Causes: Connector LCN does not properly connected Laser unit defective Engine controller board defective
Remedy: Connector LCN does not properly connected Connect the connector properly. Laser unit defective Replace the laser unit Engine controller board defective Replace the engine controller board
Code: 21
Description: Beam detector error.
Causes: Connector LCN does not properly connected Laser unit defective Engine controller board defective
Remedy: Connector LCN does not properly connected Connect the connector properly. Laser unit defective Replace the laser unit Engine controller board defective Replace the engine controller board
Code: 22
Description: NVRAM error
Causes: Main PCB defective
Remedy: Replace the main PCB
Code: 23
Description: Engine controller hardware error
Causes: Control error Engine controller board defective
Remedy: Control error Try the Power Switch Off/On Engine controller board defective Replace the engine controller board
Code: 24
Description: Process timing clock error.
Causes: Main motor defective Engine controller board defective
Remedy: Main motor defective Replace the main motor Engine controller board defective Replace the Engine controller board
Code: 25
Description: Developing motor error
Causes: Toner cartridge gear defective Developer gear unit defective Developer motor defective Engine controller board defective
Remedy: Toner cartridge gear defective Replace the toner cartridge. Developer gear unit defective Replace developer gear unit Developer motor defective Replace the developer motor Engine controller board defective Replace the engine controller board.