Precautions In Key Chip Replacement (1200Dpi Printer) - Oki C910 Service Manual

Oki Data CONFIDENTIAL

5.2.4 Precautions in Key Chip Replacement (1200dpi printer)

EFI's controller PCB for a 1200 dpi printer(AS3), 1200dpi has an EEPROM called Key Chip. The
Key Chip contains 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 are three type of keychip.
Keychip for AS3 (1200dpi printer and 600dpi)
This keychip is used for all Roman and Japanese-Heisei/Morisawa model.
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