Ricoh M281 Series Service Manual page 349

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When installing the power pack, insert the actuator [A] through the hole [B] of the power
pack [C].
4.23.8 PSU
1. Remove the controller box (MP 501/601: page 4-128, SP 5300/5310: page 4-132)
2. Remove the PSU fan. (page 4-159)
3. Remove the ground screw [A] and release the two connectors.
SM 4-155
Electrical Components
D255/D256/M281/M282