AL-840 (serv.man7). AL800 840 Service Manual-Simulation codes - Sharp Copying Equipment Service Manual (repair manual). Page 12

8 - 1

Purpose

Operation test/check

Function
(Purpose)

Used to check the developing bias voltage, the main charger voltage, and the transfer charger voltage and the
operation of their control circuit.

Section

Image process
(Photoconductor/Developing/Transfer/Cleaning)

Item

Operation/
Procedure

The following high voltages are outputted for 30 sec.

*

Transfer charger voltage (DC component + AC component)

*

Main charger voltage (DC component + AC component)

Note

8 - 2

Purpose

Adjustment/Operation test/check

Function
(Purpose)

Used to adjust and check the operation of the developing bias voltage, the main charger voltage, and the transfer
charger voltage, and their control circuit.

Section

Image process
(Photoconductor/Developing/Transfer/Cleaning)

Item

Operation/
Procedure

The following high voltages are outputted for 30 sec.

*

Transfer charger voltage (DC component + AC component)

*

Main charger voltage (DC component + AC component)

*

Developing bias voltage

Note

8 - 3

Purpose

Operation test/check

Function
(Purpose)

Used to check the operation of each voltage of the main charger and its control circuit.

Section

Image process
(Photoconductor/Developing/Transfer/Cleaning)

Item

Operation/
Procedure

The following high voltage is outputted for 30 sec.

*

Main charger voltage (Only the DC component is outputted.)

Note

14 - 0

Purpose

Clear/Cancel (Trouble etc.)

Function
(Purpose)

Used to cancel the self diag other than U2 trouble.

Section

Item

Trouble

Error

Operation/
Procedure

Note

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