1 Operational descriptions

1

MSG-052819MX-6070V OPERATIONAL DESCRIPTIONS 11 – 18

Operational descriptionsThe OPC drum surface is negatively charged by the main charger. Then the laser (writing) unit radiates laser image beams to the OPC drum surface to form electrostatic latent images.1) The OPC drum surface is negatively charged by the main charger.

The main charger grid is provided with the screen grid. The OPC drum is charged at a voltage that is virtually the same as the voltage applied to the screen grid.

2) Laser beams are radiated to the OPC drum surface by the laser(writing) unit to form electrostatic latent images.

When laser beams are radiated onto the CGL of the OPC drum, positive and negative charges are generated.Positive charges generated in CGL are attracted to the negative charges on the OPC drum surface. Negative charges are attracted to positive charges in the aluminum layer of the OPC drum.Therefore, positive charges and negative charges are balanced on the OPC drum and in the aluminum layer, reducing positive and negative charges to decrease the OPC drum surface voltage.Electric charges remain at a position where laser beams are not radiated.As a result, latent electrostatic images are formed on the OPC drum surface.

3) After transfer operation, remaining toner is removed by thecleaning blade.Toner removed from the OPC drum surface is transported to thewaste toner section by the waste toner transport screw.

OPC drum rotation controlThe OPC drum (K) is driven by the DM motor (DM_K), and the rotation speed is monitored by the OPC drum phase sensor (DHPD_K).The color OPC drums (C, M, and Y) are driven by the DM motor (DM_C/M/Y), and the rotation speed is monitored by the OPC drum phase sensor (DHPD_C/M/Y).Based on the signals monitored by the four sensors (DHPD_K/C/M/Y), the rotation speeds of K OPC drum, the color OPC drums, and the rotation phase are controlled.

4) The whole surface of the OPC drum is discharged.

By radiating the discharge lamp light to the discharge lens, light is radiated through the lens to the OPC drum surface.When the discharge lamp light is radiated to the OPC drum CGL, positive and negative charges are generated.Positive charges generated in CGL are attracted to the negative charges on the OPC drum surface. Negative charges are attracted to positive charges in the aluminum layer of the OPC drum.Therefore, positive and negative charges are balanced on the OPC drum surface and in the aluminum layer, reducing positive and negative charges to decrease the surface voltage of the OPC drum.

Aluminumlayer

OPC drum

CTLCGL

High voltage unit

Main corona unit

Screen grid

Laser beams

AluminumlayerOPC drum

OPC drum

CGLCTL

Lens

CGL CGL

Aluminumlayer

Aluminumlayer

CTL CTL

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MSG-052819

• The main charger unit is not installedproperly• The main charger unit is not assembledproperly• The drum unit’s home position sensor,discharge lamp, and after-transfer dischargelamp connector or harnesses are not seatedproperly

• Use SIM 6-4 to check the charger motoroperation• Replace charger motor• Remove and reinstall the main chargeassembly• Clean the charger home position sensor

• Check all connectors and harnesses

• The main charger unit (C, M, Y and K) is notinstalled properly• There is an abnormality in the main chargerunit• The developer unit is not installed properlyThere is a problem with one of the developingunits• Main Charge PWB or high voltage harnessdisconnected• High voltage MC PWB or PCU PWB trouble

• Check the main charge output with SIM8-2• Check the developing bias with SIM 8-1• Check Main Charger installation• Check the installation of the developingunit• Check the MC PWB harness andconnectors• Replace the PCU PWB• Replace the high voltage MC PWB

• The waste toner lock sensor is triggeredduring drum motor rotation• Waste toner transport motor trouble• Waste toner transport pipe is clogged

• Use SIM 6-1 to check the operation ofthe waste toner transport motor (WTM)• Check the waste toner transport pipe forclogging• Check the harness and the connectorbetween the PCU PWB and the wastetoner transport motor

• The main charger unit is not installedproperly• The main charger unit is not assembledproperly• The high voltage transformer connector isdisconnected.•The high voltage harness is disconnected orbroken

• Use SIM 6-2 to check the operation ofthe main charger• Check for disconnection of the maincharger

• Charger cleaner motor trouble• PCU PWB trouble or harness connectiontrouble

• Check the charger cleaner motor• Check the PCU PWB• Check harness connection between themotor and the PCU PWB

• Drum lock signal detected duringmotor rotation.• Drum motor trouble• Harness connection trouble betweenthe PCU PWB and the drum motorControl circuit

• Use SIM 25-01 to check the operation ofthe drum motor• Check the harness and the connectorbetween the PCU PWB and the developingmotor.• Remove and clean the drum unit• Replace the PCU PWB.• Replace the drum motor

• Ozone fan motor lock signal detected• Harness/connector trouble betweenthe PCU PWB and the fan motor• No power to the fan motor

• Use SIM 6-2 to check the operation of thefan motor• Check the harness and the connectorbetween the PCU PWB and the fan motor• Replace the PCU PWB• Replace the fan

C1-00 Charger trouble

C1-01 Charger cleaning trouble (K)

C1-03 Charger cleaning trouble (C)

C1-05 Charger cleaning trouble (M)

C1-07 Charger cleaning trouble (Y)

L4-17 Black motor drum lock L4-18 Cyan motor drum lockL4-19 Magenta motor drum lockL4-20 Yellow motor drum lock

L4-40 Ozone fan motor 1L4-41 Ozone fan motor 2L4-42 Ozone fan motor 3

C1-10 Main Charge trouble (Monochrome)

C1-14 Main Charge trouble (Color)

C1-02 Charger cleaner motor lock

L4-08 Waste toner motor lock

Main Charge

Motors / Cooling / Suction Fans

Trouble Codes Content Remedy

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MSG-052819

Simulation Code Purpose6-1 Used to check the operation of the waste toner motor

6-2 Used to check the operation of the fan motors

6-4 Used to check the main charge cleaner

8-1 Used to check developing bias

8-2 Used to adjust the main charge grid bias

22-1 Used to check the drum counter

22-13 Used to display all process unit counters (Drum, Blade, MC Unit, MC Cleaner and Ozone filters)

24-4 Used to clear the drum maintenance counter

25-1 Used to check the operation of the process units

44-1 Used for Image Process *Use this Simulation only if required by a Service or Technical Bulletin*

44-2 Used to adjust process control sensor

44-3 Used to adjust drum potential value *When the drum, sensor, MC unit, HVT or PCU PWB has been replaced

44-9 Used to display process data

44-12 Used to display high density process control data

44-14 Used to display the temperature and humidity values in the process area

44-15 Used to set the drum idle rotation and drum control settings

44-31 Used to perform the drum phase adjustment manually (Use Sim 50-22 for auto adj.)

• Lock signal detected• Harness or connector trouble between the PCU PWB and the fan motor • PCU PWB or fan motor trouble• No power to the fan motor

• Use SIM 6-2 to check the operation of the fan motors• Check the harness and the connector between the PCU PWB and the fan motor• Replace the PCU PWB• Replace the fan

• The fan operation signal is not detected within the specified time • Possible connector or harness problems

• Use SIM 6-2 and check the harness and connector from the PCU PWB to the fan • Replace the fan• Replace the PCU

46-24 Used to perform the automatic copy monochrome and color density adjustment

46-74 Used to perform the automatic copy/printer monochrome and color density adjustment

67-24 Used to perform the automatic printer monochrome and color density adjustment

Trouble Codes Content Remedy

L4-50 Process cooling fan 1L4-51 Process cooling fan 2L4-52 Process cooling fan 3L4-53 Process cooling fan 4L4-55 Process cooling fan

L4-57 Toner bottle cooling fanL4-45 Toner cooling fanL4-58 Process section fan

ComponentsItem Maintenance Code SimulationDrum (OPC) DK or D (C, M, Y) 24-4Cleaning Blade TA / CA / AA / D (C, M, Y, K) 24-4Cleaning Brush TA / CA / AA / D (C, M, Y, K) 24-4Side Seals F/R TA / CA / AA / D (C, M, Y, K) 24-4Separation Pawls TA / CA / AA / D (C, M, Y, K) 24-4Toner Reception Seal TA / CA / AA / D (C, M, Y, K) 24-4Main Charge TA / CA / AA / D (C, M, Y, K) 24-4 Ozone Filter TA / CA / AA / D (C, M, Y, K) 24-4

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MSG-052819

MX-M654N/M754NItem Maintenance Interval Code Function

Drum 800K DK Electrical conductor

Drum Gear 800K DK

Drive gear (Part of MainCharge kit)

Cleaning Blade 400K TA / DK Cleans toner from the surface of the drum

Toner Reception Blade 400K TA / DK Sits below the cleaning blade to capture residual toner

Side Seals F / R 400K TA / DK

Seals the edges of the drum to prevent toner dusting

Drum Separation Pawls 400K TA / DK Prevents paper wrapping around the drum

Main Charge Unit 400K MC / DK

Applies the negative charge

Procon Sensor 400K TA / DK Process Control Sensor

Discharge Lamps 400K TA / DK

Two lamps, pre-transfer and pre-charge

Cleaning Brush 400K TA / DK Assists in cleaning the drum

Process Intake Filter 400K TA / DK Helps prevent toner dusting

Ozone Filter 400K TA Charcoal filter that reduces the amount of ozone released

Item Maintenance Interval Code Function

MX-6240/7040N ◊ MX-6500/7500N

Drum (C, M, Y, K) 300K (Black) DK / TA / AA 200K (C, M, Y) D (C, M, Y) / CA / AA

Electrical conductor

Main Charge Unit 300K (Black) DK / TA / AA 200K (C, M, Y) D (C, M, Y) / CA / AA

Applies the negative charge

Toner Reception Blade 300K (Black) DK / TA / AA 200K (C, M, Y) D (C, M, Y) / CA / AA

Sits below the cleaning blade to capture residual toner

Side Seals F / R 300K (Black) DK / TA / AA 200K (C, M, Y) D (C, M, Y) / CA / AA


Cleaning Blade 300K (Black) DK / TA / AA 200K (C, M, Y) D (C, M, Y) / CA / AA

Cleans toner from the sur-face of the drum

Cleaning Brush 300K (Black) DK / TA / AA 200K (C, M, Y) D (C, M, Y) / CA / AA

Assists in cleaning the drum

Ozone Filter 300K TA / CA / AA Charcoal filter that reduces the amount of ozone released

OPC Unit 3000K (Black) DK / TA / AA 2000K (C, M, Y) D (C, M, Y) / CA / AA

Drum unit

Drum Components

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MSG-052819

MX-M904/M1054/M1204

Item Maintenance Interval Code FunctionDrum 1000K DK Electrical conductor

Cleaning Blade 500K TA / DK Cleans toner from the surface of the drum

Toner Reception Blade 500K TA / DK Sits below the cleaning blade to capture residual toner

Side Seals F / R 500K TA / DK


Drum Separation Pawls 500K TA / DK Prevents paper wrapping around the drum

Main Charge Kit 500K TA / DK Applies the negative charge

Main Charge Case 3000K TA / DK Reflects the main charge

Procon Sensor 400K TA / DK Process Control Sensor

Surface Potential Sensor 500K TA / DK Detects the amount of charge

Duct Sheet 500K TA / DK Helps prevent toner dusting

Discharge Lamp 500K TA / DK Discharges the drum

Cleaning Brush 500K TA / DK Assists in cleaning the drum

Process Intake Filter 500K TA / DK Helps prevent toner dusting

Ozone Filter 500K TA Charcoal filter that re-duces the amount of ozone released from the main charge unit

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MSG-052819

MX-3050N/3550N/4050N/3070N/3570N/4070N | MX-3050V/3550V/4050V/3070V/3570V/4070V

Item Maintenance Interval Code Function

Drum (C, M, Y, K) 200K (Black) 150K (C, M, Y) DK / D (C, M, Y) Electrical conductor

Cleaning Blade 200K (Black) 150K (C, M, Y) TA / DK / D (C, M, Y) Cleans toner from the surface of the drum

Main Charge Kit 200K (Black) 150K (C, M, Y) TA / DK / D (C, M, Y) Applies the negative charge

Toner Reception Blade 200K (Black) 150K (C, M, Y) TA / DK / D (C, M, Y) Sits below the cleaning blade to capture residual toner

Side Seals F / R 200K (Black) 150K (C, M, Y) TA / DK / D (C, M, Y)


Charger Cleaner 200K (Black) 150K(C, M, Y) DK / D (C, M, Y) Cleans the charge grid

Note:• The “D” code refers to the Drum Unit in each model.

• The “D” followed by a letter “C,” “M,” “Y,” and “K” refers to the specific Drum Unit. • The maintenance intervals are set for each model, and the alerts will display on the LCD panel when the

intervals have been reached. • “TA” codes refer to Black total counters and “CA” codes refer to Color total counters. • The “AA” code refers to a total count of both Black and Color. • The “MC” code refers to main charge unit counter. • These counters are also set for each model. They can be adjusted by using Simulation 21-1 and can be checked

by using Simulation 22-1 in some cases.

MX-5050N/6050N/5070N/6070N | MX-5050V/6050V/5070V/6070VItem Maintenance Interval Code Function

Drum (C, M, Y, K) 250K (Black) 200K (C, M, Y) DK / D (C, M, Y) Electrical conductor

Cleaning Blade 250K (Black) 200K (C, M, Y) TA / DK / D (C, M, Y) Cleans toner from the surface of the drum

Main Charge Kit 250K (Black) 200K (C, M, Y) TA / DK / D (C, M, Y) Applies the negative charge

Toner Reception Blade 250K (Black) 200K (C, M, Y) TA / DK / D (C, M, Y) Sits below the cleaning blade to capture residual toner

Side Seals F / R 250K (Black) 200K (C, M, Y) TA / DK / D (C, M, Y)


Charger Cleaner 250K (Black) 200K (C, M, Y) DK / D (C, M, Y) Cleans the charge grid

MSG-052819

MX-6240N / 7040N ◊ MX-6500N /7500N– Schematic

Voltage LegendThe PCU PWB provides the necessary voltage and supply signals to the High Voltage Unit or Main Charge Unit.

In most cases, the voltage is 24 Vdc. If this voltage is not present at the PCU PWB, either the PCU PWB or DC power supply might be faulty. If the 24 Vdc is present, then the fault would be with the High Voltage Unit or Main Charge Unit, depending on the model.

Other voltages supplied from the PCU PWB control motors (24 Vdc), sensors (5 Vdc or 3.3 Vdc) and clutches (24 Vdc). If the voltage is not present at the PCU PWB, a DC power supply or Sub DC PWB might be faulty. If the voltage is present at the PCU PWB, the component might be faulty. All components can be checked with simulation codes or a digital volt/ohm meter.

24 Vdc = 12 Vdc =5 Vdc = 3.3 Vdc =

Caution Legend

CAUTION - Indicates a general caution item.

CAUTION HIGH VOLTAGE - Be careful of an electric shock where a high voltage is applied, such as the high voltage PWB, the main charger and the process section.

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MSG-052819

MX-6500N / 7500N




24 Vdc = 12 Vdc =5 Vdc = 3.3 Vdc =

Caution Legend



To improve of color registration shift, the irregular rotation of the drum shaft is detected directly by drum encoder and the detected irregular rotation is corrected automatically. This feature is only used for the MX-6500N / 7500N.

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MSG-052819

MX-M654N / 754N – Schematic




24 Vdc = 12 Vdc =5 Vdc = 3.3 Vdc =

Caution Legend



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MSG-052819

MX-M904 / M1054 / M1204 –Schematic




24 Vdc = 12 Vdc =5 Vdc = 3.3 Vdc =

Caution Legend



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MSG-052819

MX-3050N – 4070NMX-3050V – 4070V– Schematic



Other voltages are supplied from the PCU PWB control motors (24 Vdc), sensors (5 Vdc or 3.3 Vdc) and clutches (24 Vdc). If the voltage is not present at the PCU PWB, a DC power supply or Sub DC PWB might be faulty. If the voltage is present at the PCU PWB, the component might be faulty. All components can be checked with simulation codes or a digital volt/ohm meter.

24 Vdc = 12 Vdc =5 Vdc = 3.3 Vdc =

Caution Legend



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MSG-052819

MX-5050N – 6070NMX-5050V – 6070V- Schematic



Other voltages are supplied from the PCU PWB control motors (24 Vdc), sensors (5 Vdc or 3.3 Vdc) and clutches (24 Vdc). If the voltage is not present at the PCU PWB, a DC power supply or Sub DC PWB might be faulty. If the voltage is present at the PCU PWB, the component might be faulty. All components can be checked with simulation codes or a digital volt/ohm meter.

24 Vdc = 12 Vdc =5 Vdc = 3.3 Vdc =

Caution Legend



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Documents

1 Operational descriptions