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15. Connect CN1 on the CF jig to CN5 on the fax control PCB.
16. Plug the power plug back into the wall outlet, and turn the main switch on.
ROM upgrading begins automatically. The LED on the CF jig flashes while upgrading is in progress (for about 30
seconds), then comes on solid to indicate that upgrading is finished.
17. Turn the main switch off, and disconnect the power plug from the wall outlet.
18. Disconnect the CF jig from the fax control PCB.
19. Reattach the control-box cover and rear cover.
20. Plug the power plug back into the wall outlet, and turn the main switch back on.
21. Check the ROM version again using maintenance mode U680.
3CM
Figure 1-6-5
1-6-3
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