HP Color 9850mfp Service Manual - Page 450
PS201/PS206 PI passage /U/L on, VR201/VR202 sheet size/U/L detect
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MC202 (conveyance/L) M203 (PI conveyance) PS210 (tray lower limit/L) PS207 (no sheet/L) VR212 (sheet size/L) VR201 (sheet size/U) Width regulation plates Up/down plate/L M202 (tray up/down/L) SD202 (sheet feed/L) PS209 (tray upper limit/L) c Sheet conveyance When the sheet fed from the paper feed unit at low speed turns PS201/PS206 (PI passage /U/L) on, M203 (PI conveyance) changes its rotating speed to high-speed. At this time, as MC203 (registration) turns off, the sheet is pressed against the conveyance rollers /U/L to form a loop. MC203 turns on when a specified time has passed since PS201/PS206 turned on, and the drive force of M203 is transmitted to the conveyance rollers /U/L. This causes the sheet whose bend is corrected by loop formation to be conveyed into finisher. When the sheet turns PS206 off, MC203 turns off after a specified time. With the same timing, MC203 changes its rotating speed to low-speed and comes into feeding operation for the next sheet. d Detection of sheet size VR201/VR202 (sheet size/U/L) detect the sheet width. Sheet length is detected by the combination of PS203/PS208 (sheet setting/U/L) and PS212 (sheet size/L). VR202 (sheet size/L) PS208 (sheet setting/L) PS203 (sheet setting/U) 2 Signals a Input signals 1 PS201 IN (PS201 to PIDB) Detection signal of sheet passage on upper tray L: Sheet passed H: Sheet not passed 2 PS202 IN (PS202 to PIDB) Detection signal of no sheet on upper tray L: Sheet detected H: Sheet not detected 3 PS203 IN (PS203 to PIDB) Detection signal of sheet setting on upper tray L: Sheet detected H: Sheet not detected 4 PS204 IN (PS204 to PIDB) Detection signal of upper limit of up/down plate/U L: Positioned at upper limit H: Not positioned at upper limit 5 PS205 IN (PS205 to PIDB) Detection signal of lower limit of up/down plate/U L: Positioned at lower limit H: Not positioned at lower limit 12 Post insertion unit explanation ENWW