Konica 420

CSES ID No. TABT0600393EN00
Subject: C2403 after installing the countermeasure part
Product Name: bizhub 420/500
Date: October 16, 2006

How to check, clean and replace Toner Bottle PositionSensor

1. Access the Service mode, then State Confirmation -> Sensor check.
2. Enter Code 57 and Multi code 3.
3. Remove and install the bottle tray and check the result display.
Pull out and putin the bottle tray at the home position.
Result display
When pulling out: 0
When putting in: 0
If 1 is displayed during this check, the
sensor detects wrongly.

Pull out and put in the bottletray at slightly moved position.
Pull out the tray and rotate the bottle
half or quarter way clockwise.

Result display
When pulling out: 0
When putting in: 1
If the display does not switch from0 to 1
and remains 0 or 1 during this check, the
sensor detects wrongly.

CSES ID No. TABT0600393EN00
Subject: C2403 after installing the countermeasure part
Product Name: bizhub 420/500
Date:October 16, 2006


If detection error was seen by the sensor operation check, clean or replace the sensor by the procedure below.
* Remove the toner bottle beforehand.
(1) Remove the rear cover.It is preferable to remove also the drum cartridge and the developing unit.
(2) Remove the control board unit.

(3) Remove the motor and flywheel.

(4) Remove the toner supply unit.

*Clean the metal that holds the bottle tray and the bottle tray surface before cleaning the sensor.
(5) Check the sensor installation condition.

If the sensor is not stable and interferes with theplastic
part while pulling out/putting in the bottle tray, replace the
sensor.

Clean the sensor.
With the condition above, insert the nozzle of a commercially available air blower (used for OAequipments) in the sensor
reception side (other side of the sensor in the photo).

Blow away the toner.

With this state, install the control board unit (not fix it with screws, just hook the upper...