hp Color 9850mfp TRANSFER BELT UNIT II UNIT EXPLANATION 2-31 Symbol Name Function or method [9] Toner guide brush Scraping and collection of toner on the transfer belt [10] Toner collection screw Conveys toner from the belt cleaning section to the toner col- lection section Screw method [11] Image correction unit Detection of variety of information of images transferred on the transfer belt [12] Transfer belt separation claw Paper separation assist from the transfer belt Pressure/release method by the transfer belt separation claw solenoid (SD1) [13] 2nd transfer roller U Toner transfer from the transfer belt to paper Constant current DC bias applied roller method DC output range by constant current method:
+30 to -120µA [14] 2nd transfer roller L (Provided on ADU side) Toner transfer from the transfer belt to paper Pressure/release mechanism by means of cam Driven idly by the transfer belt M18 Transfer belt motor Driving of the transfer belt DC brushless motor, PLL control M19 1st transfer pressure/release motor Pressure/release of the 1st transfer roller Y, M, C, K Stepping motor SD1 Transfer belt separation claw solenoid Pressure/release of the separation claw 24VDC drive PS15 1st transfer HP sensor Pressure/release mechanism of the 1st transfer roller Y, M, C, K Home position detection PS68 Encoder sensor/belt 1 Detection of the rotation of encoder for the transfer belt drive shaft Drive control of the transfer belt motor (M18) 2 sensors of the PS68 and PS69 are provided at the opposite position of the encoder to cancel the change of rotation caused by the eccentricity of the encoder.
PS69 Encoder sensor/belt 2 Detection of the rotation of encoder for the transfer belt drive shaft Drive control of the transfer belt motor (M18) 2 sensors of the PS68 and PS69 are provided at the opposite position of the encoder to cancel the change of rotation caused by the eccentricity of the encoder.