Oki Data CONFIDENTIAL
43627911TH Rev. 3
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5.2.4 Precautions in Key Chip Replacement (1200 dpi printer)
EFI's controller PCB for a 1200 dpi printer has an EEPROM called Key Chip. The Key Chip con-
tains EFI's management information. If the Key Chip is not mounted, the AS3 PCB won't work.
If the error message "This is not an authorized program 001" as shown in "7.5.1 LCD Message
List" appears, replace the Key Chip with a new Key Chip. The removed Key Chip shall be re-
turned to the ODC. The Key Chip is very expensive, as the royalty fee is included. Take great
care in handling it.
5.2.4.1 KeyChip type
There is only one type of keychip and same keychip is used for all Roman and Japanese-Heisei/
Morisawa model.
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