Canon FAX-L1000 - Manual (Page 576)

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FAX-L1000 Chapter 5: Appendix
3.9.4 Maintenance and service
a) Troubleshooting
The main unit does not recognize the optional memory
<Possible causes>
1.Defective optional memory
Action: Replace the optional memory
2.Defective PDL board
Action: Replace PDL board
"OPTION RAM ERROR"
<Possible causes>
1.Defective optional RAM DIMM
Action: Replace the RAM DIMM.
2.Defective PDL board
Action: Replace the PDL board.