IBM 6400 series Maintenance Manual page 257

Installation
1. Fully close the forms thickness lever (position 'A').
2. Position the platen interlock switch assembly on the switch bracket and
install the two screws securing it to the bracket. (See Figure 49, page
283.)
3. Route the switch cable through the cutout in the right side plate and to
the controller board. (See cable routing diagram on page 306.)
4. Connect the platen interlock switch cable to the connector shell P107
(P7) (see page 198), then connect the connector shell to the controller
board.
5. Cabinet Model: Install the paper guide assembly (page 235).
Pedestal Model: Install the top cover assembly (page 210).
6. Return the printer to normal operation (page 159).
Replacement Procedures and Illustrated Parts List
257