HP Color 9850mfp Service Manual - Page 151
Operation board control, Operation board composition
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II UNIT EXPLANATION hp Color 9850mfp Symbol [16] [17] [18] [19] Name Drum cooling fan 1 (M12) Drum cooling fan 2 (M13) Scanner cooling fan (M2) Drum unit fan (M47) OTHER CONTROLS Function or method Discharging heat around the drum drive motor out of the engine Discharging heat around the drum drive motor out of the engine Cooling of the scanner section Cooling around the drum 15.4 Operation board control 15.4.1 Operation board composition OACB Symbol Name [1] Touch panel board LCDB LCD board OB INVB OB inverter board OB1 Operation board 1 OB2 Operation board 2 OB3 Operation board 3 SW2 Main switch OB1 TOUCH PANEL BOARD LCDB OB INVB OB3 OB2 SW2 Function or method Touch switch board used to directly select items shown on the LCD board (LCDB) Information of all sorts is displayed on this Inverter that drives the LCD board (LCDB) Control of the touch panel board, LCD board (LCDB), OB inverter board (OB INVB), operation board 3 (OB3), and the control of the LED within the operation board 1 (OB2) and the numeric pad LED-loaded board to grasp the on/off condition of the reset switch (SW1) Volume loaded board to adjust the brightness of the LCD board (LCDB) Power switch of the operation board It does not function when the reset switch (SW1) is off 2-77
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