CHAPTER 4 TROUBLESHOOTING IMAGE FAULTS/MALFUNCTIONS4-576.2.5 Sensors (1/3)• Reader UnitElectrical signal (target) Reference to general I/O address RemarksName circuit diagram I/O indicationPS400 (R-CON) A3-18-H IO-P06-4Scanner home position sensor 1: HPPS401 (R-CON) A3-17-H IO-P06-6Copyboard cover sensor 0: open, 1: closed(copyboard/ADF)SD1 (R-CON) A3-19-H IO-P03-5Original sensor 0: present, 1: absent (paper)IO-P04-40: ON, 1: OFF• Printer Unit (1/3)Electrical signal (target) Reference to general I/O address RemarksName circuit diagram I/O indicationBD (DC-CON) A3-13-KBD sensorPS1 (DC-CON) A3-19-N P013-5Cassette 1 paper sensor 0: present, 1: absent (paper)PS2 (DC-CON) A3-19-M P014-5Cassette 2 paper sensor 0: present, 1: absent (paper)PS3 (DC-CON) A3-20-M P013-6Cassette 1 paper (paper)level sensor 1 25% (bit6=0; bit7=1)PS4 (DC-CON) A3-20-M P013-7 50% (bit6=1; bit7=1)Cassette 1 paper 100% (bit6=0; bit7=0)level sensor 2PS5 (DC-CON) A3-20-M P014-6Cassette 2 paper (paper)level sensor 1 25% (bit6=0; bit7=1)PS6 (DC-CON) A3-20-M P014-7 50% (bit6=1; bit7=1)Cassette 2 paper 100% (bit6=0; bit7=0)level sensor 2PS7 (DC-CON) A3-20-M P015-0Cassette 1 re-try 1: present, 0: absent (paper)paper sensor
