IBM PCjr Hardware Maintenance And Service page 23

5. Remove any cartridge, cassette, or diskette from the
system unit and attached devices.
6. If the cordless keyboard is being used without its
optional keyboard cord:
• Position the keyboard within 12 inches of the
front of the system unit.
• Remove any obstructions between the infra-red
(IR) emitter in the back of the keyboard and the
IR receiver on the system unit.
Infra-Red Receiver
Infra-Red
Emitter
2-5