HL-2030/2040/2070N SERVICE MANUAL
Confidential
8-5
< Functions of each “Service Mode” >
(1) Factory Inspection Mode
This mode is to check each sensor at the assembly line. Since the number of sensors in
the ALL series is small, the sensors can be checked by performing a print operation in
principle.
1) This mode is included in the product software.
2) The machine goes into the inspection mode by a special operation when the
power is turned on.
3) In the inspection mode, the Ready LED blinks once when the state of a sensor
or a switch is changed (from ON to OFF, or from OFF to ON).
4) The Toner LED is lit when the state of all switches and sensors, except the tail
edge sensor, is detected.
1. How to go into Factory Inspection Mode
(In this operation, you can check the Go button, the Toner/Drum/Paper/Ready
LEDs, the open state of the cover, and the halt state of the fan.)
i) Turn on the power switch as pressing the Go button while the front cover is
open. After all LEDs on the panel are lit, only the Ready LED goes out.
ii) Press the Go button.
iii) All the LEDs go off.
iv) Press the Go button once again. (Turn it on and off.)
v) The three LEDs, or Toner/Drum/Paper LEDs are lit.
vi) Press the Go button once again. (Turn it on and off.)
vii) All the LEDs go out.
2. Sensor Inspection Check Procedure
You can conduct the following inspections i) to v) in any order.
i) Check sensors.
Manually activate the sensors listed below, and verify that the Ready LED is
lit. (When the state is changed continuously, the Ready LED keeps blinking.)
Cover sensor, New toner sensor, Regist rear sensor
Paper eject sensor, Regist front sensor, Toner sensor
Tail edge sensor (This sensor cannot be activated from outside.)
When the verification of all the sensors, except the tail edge sensor, is
completed, the Toner LED becomes lit.
ii) Check that the Toner LED goes out.
Verify that the Ready LED is lit when pressing the Go button while the front
cover is closed.
(When you press the Go button while the front cover is closed, the Toner
LED goes out. It remains off while the Go button is being pressed.)
iii) Check the fan operation.
Close the front cover and verify the fan operation. (Verify full- speed and
half-speed rotations, and halt.)
The fan must repeat the following operations whenever the cover sensor is
pressed.
Full-speed rotation Æ Half-speed rotation Æ Halt Æ Full-speed rotation.
iv) Check the Sol.
Verify that the pick-up sol is turned on when the new toner sensor is turned on.
Verify that the regist sol is turned on when the regist front sensor is turned on.
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