Reference diagrams This drawing shows key components, sensors, and switches that control the operation of the printer. Engine controller PCB Cassette pickup solenoid drive signal (CSTSL) SL909 PS501 PS503 SL1908 Transfer charging roller Registration roller Feed rollers Cassette Cassette pickup roller PS1305 Tray 1 pickup roller Figure 165. Printer paper path, sensors, and signals PS501: Reversed paper sensor PS502: Face-up sensor PS503: Duplex pickup paper sensor PS1305: Cassette paper sensor PS2301: Delivery sensor PS2305: Top-of-page sensor PS3208: Tray 1 paper sensor SL909: Duplex solenoid SL1908: Cassette pickup solenoid SL2908:
Tray 1 pickup solenoid 220 Chapter 7 Troubleshooting C7058-90936 (DUPSL) (DUPSL) CB signals signals drive drive motor solenoid Reverse Duplex ce down livery rollers M904 Reverse motor Main motor (/MON) Po signals (/CSTSNS) drive motor signal Main detection paper Cassette M903 (MPTSL) signal drive solenoid pickup 1 Tray e Registration shutter Tray 1 paper detection signal (/MPTSNS) Po wer supply P CB Po wer s upply PCB Face-up detection signal (/FOUSNS) (/POSNS) signal detection Delivery Fa de Duplex pickup paper detection signal (/DUPSNS) (/TOPSNS) signal detection page of Top Photosensitiv drum