Ricoh AP-P2 G188 Field Service Manual page 59

Punch Unit (B807)
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12. Install the punch unit [M] along the punch unit stay from the rear side.
13. Make sure to put the punch unit stay pin [N] through the hole [O].
14. Connect the harnesses [P] to the main PCB.
15. Put the harnesses [Q] through the hole [R] in the rear frame ( x 1).
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