Canon PD-82 Service Manual page 66

CHAPTER 4
b. Motor test
Tuning the power ON with the test switches set to the motor test mode starts the motor test.
All the motors, clutch and solenoid are turned ON forcibly in the motor test mode. Turning
OFF the power ends the motor test.
Be sure to open the feed unit and pull out the tray before executing the motor test.
Conditions of the motors are determined depending on the sound of the motors and whether
or not the rollers rotate. Condition of the clutch is determined depending on whether or not the
feed roller 2 rotates. Condition of the solenoid is determined depending on whether or not the
pick-up roller goes up and down when the pick-up roller arm located inside the pick-up unit is
pressed.
c. Paper pick-up test
Turning ON the power with the test switches set to the paper pick-up test mode starts the paper
pick-up test.
Once the paper pick-up is started, the test is continued till the paper runs out.
When the SW201-1 is switched OFF, the paper pick-up mode is canceled and the paper pick-
up test is interrupted. The test is re-started by switching SW201-1 ON again.
Notes: 1. Set only one sheet of paper into the tray.
When the paper deck enters the paper pick-up mode and executes the paper pick-up
operation, the printer does not operate. The paper picked up and fed into the print-
er causes a jam. Since the paper pick-up operation is continued until the paper runs
out, placing plural sheets causes the paper jam one after another.
2. Make sure to set all switches OFF at the end of the tests.
3. Be sure to pull out the tray before executing the motor test.
The paper deck is designed to allow the motor test to be executed only when the tray
is pulled out. However, if the connector of the paper size detection PCB is discon-
nected or the PCB is defective, the paper deck determines that the tray is out even if
the tray is not pulled out and thus starts the motor test. In such a case, troubles,
such as wire cut, may occur.
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