HP Color 9850mfp Service Manual - Page 409

Q5690A 1.2.5 Remaining paper detection PAPER FEED Remaining paper is detected by the remaining paper sensors 1 to 4 (PS102 to PS105). FRONT [7] II UNIT EXPLANATION [3] [1] [4] [5] [2] [6] [1] Actuator [2] Direction of rotation while in tray up drive [3] Remaining paper sensor 1 (PS102) [4] Remaining paper sensor 2 (PS103) [5] Remaining paper sensor 3 (PS104) [6] Remaining paper sensor 4 (PS105) [7] No paper sensor (PS108) As paper gets reduced, the up/down plate goes up little by little. The actuator at the rear rotates in interlock with this up drive. The remaining paper is detected in eight steps in combination of the PS102 to the PS105 that are turned on and off by the actuator. When the PS108 turns on, no-paper detection is made with a message shown on the display of the engine. No. of sheets to be PS102 stacked (in 80g/m2 sheet) Less than 600 sheets 600 to 850 sheets { 850 to 1100 sheets { 1100 to 1400 sheets { 1400 to 1700 sheets { 1700 to 1950 sheets 1950 to 2250 sheets More than 2250 PS103 { { { { PS104 { { { { PS105 { { { { Remaining paper indication on operation board 1 bar on the LCD 1 bar on the LCD 2 bars on the LCD 2 bars on the LCD 3 bars on the LCD 3 bars on the LCD 4 bars on the LCD 4 bars on the LCD {: Sensor on * The remaining paper indication on the operation board is made by 4 bars that turn on or flash. The number of sheets to be stacked varies depending on the thickness of paper. 2-5