EPSON Stylus PHOTO 810/820/830

Revision B

For your reference, the top or the end of a paper is usually detected with the HP/PE sensor. In case that the HP/PE sensor cannot detect the top of a paper in the paper loading sequence, the printer indicates the "Paper out error". If the HP/PE sensor cannot detect the end of a paper in the paper feeding sequence, the printer indicates the "Paper jam error". As for the details, refer to Chapter 3 "Troubleshooting".

2.1.4.1 Paper Loading Mechanism (ASF unit)

The Paper loading mechanism consists of the Change lever in the Pump unit, the Holder shaft unit (including the Clutch mechanism) and the ASF unit.

The Change lever and the Clutch mechanism play a major role in the Paper loading mechanism as follows.

1.ASF home position detection function

The ASF unit on this printer does not have the ASF home position sensor. Instead of the ASF home position sensor, the Change lever and the Clutch mechanism is used to detect the ASF home position.

When the Change lever is set on the Clutch mechanism with the counterclockwise rotation of the PF motor pinion gear, the ASF home position is detected by this lever for the paper loading operation. In this time, the printer cannot load a paper from ASF unit because the drive of the PF motor is not transmitted to the LD roller shaft.

2.Paper loading function

When the Change lever is released from the Clutch mechanism with the clockwise rotation of the PF motor pinion gear, the ASF home position detection function is changed over to the paper loading function. Therefore, the printer can load a paper from ASF unit because the drive of the PF motor is transmitted to LD roller shaft.

On this printer, the Paper return plate is built in ASF unit instead of the Paper return lever. The LD pad is stacked on the Paper return plate, and it works with the tension force of the Torsion spring 29.1 mounted on the ASF frame.

When an arc portion of the LD roller pushes down this plate into the ASF frame during the paper loading sequence, a paper is loaded from the ASF unit. A cutout portion of the LD roller releases this lever and this plate returns papers to the stand-by position for next paper loading operation.

Following figures (refer to Figure 2-8/Figure2-9) show you the ASF paper loading sequence and the operation of each mechanism.

Operating Principles

Overview

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