Ricoh FT5540 Service Manual page 174

6. Remove the rear cover (4 screws), the left cover [A] (2 screws), and the scanner lock plate
[B] (1 screw).
NOTE: Reinstall the screw for future use. Do not throw away the scanner lock plate; it must
be reinstalled before the copier is transported long distances.
7. Remove the main PCB shielding plate [C] (2 screws), and move the jumper connector
(JPSW 191) on the timer PCB [D] from the upper (printed "OFF") to the lower position.
Then, reinstall the removed covers if no peripherals are to be installed.
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31 August 1989