Ricoh D146 Service Manual page 159

Booklet Finisher SR3170 (D688)/ Finisher SR3160 (D689)
2.15.2 INSTALLATION PROCEDURE
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When you install this option, turn off the power to the machine, and unplug the power
plug from the wall socket.
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If it is installed when the power is on, it will result in an electric shock or a malfunction.
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Before installing this option, attach the "Bridge Unit BU3070" first.
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Attach the "LCIT PB3170" or "Paper Feed Unit PB3160" first before installing this option.
1. Remove the external orange tape and shipping retainers.
D146/D147/D148/D149/D150 2-88 SM