Panasonic FP7728

• Code: o
• Description: In power save mode. Press any key

• Code: O
• Description: In standby mode. Press any key

• Code: P-
• Description: Add paper

• Code: U10
• Description: Document feeder interlock

• Code: U13
• Description: Add toner. Could also be toner density sensor, toner feed system, or main board. Note: To clear U13, any key must be pressed. If this does not clear the U13, see F5-63 to determine which keys for which machine must be pressed.

• Code: U16
• Description: Developer unit not installed properly, or connector problem.