HP 8550 Service Manual - Page 83
Level 2, address, Description, Reversal sensor S8
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Table 36. Copier, I/O mode Level 2 and Level 3 menus (continued) Level 2 Level 3 (address) Bit FEEDER P001 3 (input ports of the feeder controller 2 PCB) 1 0 P002 2 1 0 P003 5 P004 4 3 2 1 0 P006 7 6 4 3 2 Item BDIR SMPSL FLPSL1 STPSL SPRS EJTS1 TLIRNS RSS DCTS ECLK RCLK FCLK BCLK SMON SMPWM FMPWM BMON BMPWM Description Belt motor (M3) rotation direction signal ("1" when in correct delivery mode) Stamp solenoid (SL4) drive ("1" when on) Paper deflecting plate solenoid (SL3) drive ("1" when on) Stopper plate solenoid (SL1) drive ("1" when on) Pick-up sensor (S7) ("1" when paper is present) Delivery sensor 1 (S6) ("1" when paper is present) Reversal sensor (S8) ("1" when paper is present) Recirculation sensor (S14) ("1" when paper is present) Pick-up roller sensor (S13) ("1" when paper is present) Delivery motor clock sensor (S13) (alternates "0" and "1" when rotating) Registration roller clock sensor (S11) (alternates "0" and "1" when rotating) ADF motor clock sensor (S9) (alternates "0" and "1" when rotating) Belt motor clock sensor (S10) (alternates "0" and "1" when rotating) Pick-up motor (M1) drive signal ("1" when on) Pick-up motor (M1) speed signal ("0" or "1" according to speed) ADF motor (M2) speed signal ("0" or "1" according to speed) Belt motor (M3) drive signal ("1" when on) Belt motor (M3) speed signal ("0" or "1" according to speed) EN Service mode 81