Sequence Of Operations; Document Feeding/Delivery; Outline - Canon DADF-Q1 Service Manual

Feeder

Table of Contents

Chapter 2

[1] ADF controller PCB

[2] Current detection circuit

M4: separation motor

MI2: separation motor clock sensor

When the CPU sends the motor rotation speed signal (SPPWM), the separation motor (M4) starts to rotate in a specific direction. The separation motor clock sensor

(PI2) sends the separation motor rotation speed signal (SPCLK) to IC17 (speed control IC). In response, IC17 compares the arriving rotation speed signal against

the speed reference signal (SEPCLKREF) from the CPU, and sends the result as the speed control signal (SPMFV) to the CPU. Using the arriving speed control

signal, the CPU varies the rotation speed signal. LED3 goes on when the motor rotation speed is within a specific range, while going off if out of the range. The

current detection circuit monitors the current flowing in the separation motor; when the level of the current exceeds a specific value, it sends the separation motor

stop signal (SPLIM) to stop the motor. The CPU identifies a fault in the separation motor if the separation motor stop signal continues, indicating an error code

(E405) on the host machine's display.

Error code: E405

- fault in the separation motor (M4)

- fault in the separation clock sensor (PI2)

- fault in the ADF controller PCB

2.4.7 Sequence of Operations

Picking Up/ Separation Originals

2.5 Document Feeding/Delivery

2.5.1 Outline

Originals are moved by rotating the feeding belt by the belt motor (M2). Further, originals are moved either to the right or to the left depending on the operating

mode in question.

Originals are delivered by rotating the delivery motor (M5). Originals are always delivered to the original delivery tray.

2-20

PI 2

J12

SPCLK

Feeding/Separation

Start key ON

Picking up/

separating

1st original

Original sensor (S6)