hp Color 9850mfp WRITE II UNIT EXPLANATION *1 It is not installed on the write unit /K.
2-13 Symbol Name Function or method [13] Index sensor board C (INDX SB C) Controls the laser writing position in the main scan direction (write unit C) [14] Index sensor board K (INDX SB K) Controls the laser writing position in the main scan direction (write unit K) [15] Index lens Collects the laser light reflected from the index mirror [16] Laser correction motor Y (M7) Swing-drives the cylindrical lens 2 (write unit Y) [17] Laser correction motor M (M8) Swing-drives the cylindrical lens 2 (write unit M) [18] Laser correction motor C (M9) Swing-drives the cylindrical lens 2 (write unit C) [19] Write unit K Write unit for black [20] Write unit C Write unit for cyan [21] Write unit M Write unit for magenta [22] Write unit Y Write unit for yellow [23] Dust-proof glass Keeps dust out from the write unit [24] fθ lens Makes the laser scan speed uniform against the laser expo- sure surface on the drum [25] Cylindrical lens 2 Corrects the laser path against the angle error in the polygon mirror [26] Index mirror Reflects the laser light to the index sensor boards Y, M, C, K (INDX SB Y, M, C, K) [27] Laser drive board Y (LDB Y) Laser light (write unit Y) 1 chip 1 beam method, 7mW 650nm [28] Laser drive board M (LDB M) Laser light (write unit M) 1 chip 1 beam method, 7mW 650nm [29] Laser drive board C (LDB C) Laser light (write unit C) 1 chip 1 beam method, 7mW 650nm [30] Laser drive board K (LDB K) Laser light (write unit K) 1 chip 1 beam method, 7mW 650nm [31] Collimator lens Collimates the diffusing laser light