Konica-Minolta bizhub 20P

9) Factory Inspection Mode

This mode checks the operation of each sensor and solenoid to check the point with the malfunction, when repair the machine.

• The machine goes into the inspection mode by a special operation when the power is turned on.
• In the inspection mode, check that the Status LED or a switch is changed (from ON to OFF, or from OFF to ON).

Sensor Inspection Check Procedure

• Check sensors.
  Manually activate the sensors and the actuators listed below, and verify that the Status LED is lit.
  (When the state is changed continuously, the Status LED keeps blinking.)
  (Regist front sensor, Regist rear sensor, Paper eject sensor, New toner sensor, Front cover sensor, PE sensor, Edge sensor, MP PE sensor, Duplex tray sensor)
  * The toner sensor is unsupported.
• Check the Solenoid.
  Verify that the ejector solenoid is turned on when the regist front sensor is turned on.
  Verify that the regist solenoid is turned on when the regist rear sensor is turned on.
  Verify that the MP solenoid is turned on when the MP PE sensor is turned on.
  Verify that the Tray 1 solenoid is turned on when the Edge sensor is turned on.
• When the verification is completed, turn the power off.

10) Continuous Grid Pattern Print Mode

This mode is to continuously print a grid pattern with a total counter value on it. The number of grid pattern prints is displayed at the same time.

11) Fixing Unit Test Print

This is to print the following three patterns to check the fixing unit.

• Grid pattern with a serial number on it
• Gray pattern
• Black pattern

12) NV-RAM Value Dump Mode

This is to collectively print the whole present state of the NV-RAM of the machine.

13) RAM Check

This is to execute a stricter RAM check than a standard one.
If the result turns out unaccepted, it considers an error, and all LEDs blink. If it turns out accepted, the Status LED blinks. (Yellow ↔ Green)

14) QA Test print

This is to print four patterns to check the machine quality. When this operation is completed, the machine automatically goes back to the waiting Service mode state.

15) DX setting (ON/OFF)

Select the ON/OFF of duplex setting. Whenever you switch the mode, the setting is changed over from the present one to other. LEDs are as follows when changing the setting.

When changing from DX OFF to ON.		When changing from DX ON to OFF.
	Toner and Drum LEDs light for 1 second.		All LEDs does not light.