HP M5025 Service Manual - Page 170

Pickup/feed operation The HCI operation picks up paper in the cassette one sheet at a time and feeds it to the device. This section describes the pickup/feed operation for the 1 x 500-sheet HCI and the top cassette of the 3 x 500sheet HCI. The pickup/feed operation for the center and bottom cassettes of the 3 x 500-sheet HCI is the same as the top cassette. HCI driver PCA HCI PAPER LENGTH DETECTION signal HCI PAPER WIDTH DETECTION signal HCI LIFTER MOTOR DRIVE signal HCI CASSETTE PAPER signal (P_SNS) HCI PAPER STACK SRUFACE signal (P_LVL) HCI PICK-UP SOLENOID DRIVE signal (PICKDV) HCI PICK-UP MOTOR DRIVE signal HCI FEED DETECTION signal (P_TOP) HCI pick-up roller HCI feed roller HCI paper separation roller Figure 4-33 HCI paper pickup/feed operation ● The DC controller operates the HCI driver PCA when it receives a print command from the formatter. ● The HCI driver PCA performs the pickup/feed operation for the HCI. The PCA picks up the paper and feeds it to the device entrance. The following table lists the assigned electrical component codes for the 1 x 500-sheet HCI cassette and the 3 x 500-sheet HCI cassettes. Table 4-5 HCI paper pickup/feed operation Component name HCI cassette paper sensor HCI stack surface sensor 1 x 500-sheet HCI cassette 3 x 500-sheet HCI top cassette 3 x 500-sheet HCI middle cassette SR2 SR6 SR1 SR5 3 x 500-sheet HCI bottom cassette SR8 SR7 140 Chapter 4 Theory of operation ENWW