turning on/off the pre-exposure LED

F value Developing DC bias standard value (V)

Shift (V) Image processing Image density

1 240 60 yes lighter

2 220 40 no

3 180 0 no

4 140 -40 no

5 120 -60 yes darker

F value Developing DC bias standard value (V)

Shift (V) Thickening*1 Image density

1 218 48 no light

2 205 35 no

3 194 24 no

4 182 12 no

5 170 0 no

6 153 -17 no

7 137 -33 no

8 120 -50 no

9 120 -50 yes dark

F-7-13 The following is the signal associated with the mechanism:

[1] Pre-exposure LED control signal; when '0', LED goes on

7.5.2 Primary Charging Mechanism

7.5.2.1 Overview

0015-4488

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N

The following items are associated with the primary charging control system:

1. turning on/off the primary corona current

2. controlling the constant current level of the primary corona current

3. controlling the constant voltage level of the grid bias (fixed to 850 V by a valista)

The following shows the construction of the control system associated with the primary charging control system:

F-7-14 The following signals are associated with the mechanism:

[1] Primary charging leakage detection signal; when '0', if the current is too high or too low

[2] Primary corona current control signal; used to control the primary charging current generated by the high-voltage PCB [3] High-voltage remote signal; turning on/off the primary charging corona current output

7.5.2.2 Primary Charging Assembly Cleaning Mechanism

0015-4489

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N

The primary charging wire cleaning mechanism is turned on at the following timing, and the construction of the control system is as shown:

Timing of Cleaning

- when the wire cleaning mechanism is executed in user mode - when the wire cleaning mechanism is executed in service mode:

COPIER>FUNCTION>CLEANING>WIRE-CLN*1 - after the end of cleaning, at the end of every 2,000 prints*2

- in a low temperature or high humidity environment, if the fixing roller is 160 deg C or less when the power is turned on

*1: The machine executes it when the primary charging wire or the transfer charging wire has been replaced.

*2: The default cleaning interval may be changed in service mode (COPIER> OPTION> BODY> W-CLN-P).

DC-CON

Pre-exposure lamp 24V

PRE_LED_ON* [1]

J103A

DC controller PCB High-voltage PCB

PRIMARY-LEAK-DETECT [1]

HVT-REMOTE [3]

Primary charging wire Grid wire

HVT-PRIMARY [2]

J102A J4502

F-7-15 The following signals are associated with the mechanism:

[1] Primary charging wire cleaning motor reverse direction signal; when '1', the wire cleaner moves toward the rear.

[2] Primary changing wire cleaning motor normal direction signal; when '1', the wire cleaner moves toward the front.

[1] 1éüë—ìdê¸ê¥ë|ÉÇÅ[É^ãtì]ãÏìÆêMçÜ1: "1" ÇÝÉèÉCÉÑÉNÉäÅ[ÉiÇÕâúï°å¸Ç…à⁄ìÆ [2] 1éüë—ìdê¸ê¥ë|ÉÇÅ[É^êŠì]ãÏìÆêMçÜ2: "1" ÇÝÉèÉCÉÑÉNÉäÅ[ÉiÇÕéËëOï°å¸Ç…à⁄ìÆ

7.5.2.3 Others

0015-4490

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N

SERVICE MODE:

COPIER>FUNCTION>CLEANING>WIRE-CLN

Use it so that the machine causes the wire cleaner to make 5 round trips to automatically clean the charging wire when the primary charging wire or the transfer wire has been replaced.

COPIER>OPTION>BODY>W-CLN-P

Use it to specify the interval at which the primary charging wire is automatically cleaned in terms of the number of prints made.

7.5.3 Dust-Collecting Roller Bias 7.5.3.1 Overview

0015-4491

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N

The machine is equipped with a dust-colleting roller to collect stray toner occurring after development. The toner collected on its surface is removed by the work of a scraper.

The following item is associated with the dust-collecting roller bias control system:

1. turning on/off the dust-collecting roller bias

The following shows the construction of the dust-collecting roller bias:

Primary changing assembly DC controller PCB Wire

(to rear)

(to front) PRIMARY_CLEAN_OUT1 [1]

J103A

Wire cleaner PRIMARY_CLEAN_OUT2 [2]

Primary charging wire cleaning motor (M6)

F-7-16 The following signal is associated with the mechanism:

[1] dust-collecting roller bias remote signal; if '1', the dust-collecting roller bias turns on.

7.5.4 Pre-Transfer Charging Mechanism 7.5.4.1 Overview

0015-4492

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N

The following items are associated with the pre-transfer charging control system:

1. controlling the constant current level of the DC bias 2. controlling the fixed voltage level of the AC bias

3. controlling the output to suit the environment (fuzzy control)

The following shows the construction of the system associated with the pre-transfer charging control mechanisms:

F-7-17 The following signals are associated with the mechanism:

[1] Pre-transfer/separation charging leakage detection signal; when the current is too high or too low, '0'.

[2] Pre-transfer charging control signal; controls the DC bias current and AC bias voltage generated by the high-voltage PCB.

[3] Pre-transfer/separation charging remote signal; turns on/off the pre-transfer/separation current output.

7.5.4.2 Controlling the Output to Suit the Environment (fuzzy control)

0015-4494

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N

The pre-transfer charging current is optimized to suit the environment (i.e., reading of the environment sensor):

F-7-18 SERVICE MODE:

DC controller PCB High-voltage PCB

DC -1000V HVT_ROLLER_BIAS

[1] Dust-collecting

roller

Scraper

J102A J4502

DC controller PCB

HVT_POST [3]

SEPARATE-LEAK-DETECT [1]

High-voltage PCB

Pre-transfer charging wire

HVT_AC [2]

High-voltage AC transformer

AC+DC

J102A J4502 J4503

Low temperature High temperature

Pre-transfer current

COPIER>OPTION>BODY>FUZZY (turning on/off fuzzy control) 0: enable fuzzy control (default)

1: low humidity mode (for pre-transfer charging current level lower than standard) 2: normal humidity mode

3: high humidity mode (for pre-transfer charging current higher than standard)

When set to '1' through '3', the machine executes the appropriate modes independently of the reading of the environment sensor.

7.5.4.3 Pre-Transfer Charging Assembly Cleaning Mechanism

0015-4495

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N

The machine executes pre-transfer charging wire cleaning as follows using its associated mechanism:

Timing

1. when wire cleaning is executed in user mode.

2. when wire cleaning is executed in service mode (COPIER> FUNCTION> CLEANING> WIRE-CLN)*1.

3. after the end of cleaning, every 2,000 prints*2.

4. in a low temperature or high humidity environment, if the fixing roller is 160 deg C or less when the power is turned on.

*1: The machine executes cleaning when the primary charging wire or the transfer charging wire has been replaced.

*2: The default cleaning interval may be changed in service mode: COPIER> OPTION> BODY> W-CLN-P.

F-7-19 The following signals are associated with the mechanism:

[1] Pre-transfer charging wire cleaning motor normal direction signal; when '1', the wire cleaner moves toward the rear.

[2] Pre-transfer charging wire cleaning motor reverse direction signal, when '1', the wire cleaner moves toward the front.

7.5.4.4 Others

0015-4496

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N

SERVICE MODE:

COPIER>ADJUST>HV-TR>PRE-TR (entering output adjustment value for pre-transfer charging current) Enter the value indicated on the service label if you have initialized the RAM on the DC controller PCB.

COPIER>ADJUST>HV-TR>H-PRE-TR (entering offset value for pre-transfer high-voltage output of high-voltage unit)

Enter the value indicated on the label attached to the new high-voltage unit if you have replaced the high-voltage unit or initialized the RAM on the DC controller PCB.

COPIER>ADJUST>HV-TR>D-PRE-TR (entering offset value for pre-transfer high-voltage output of DC controller PCB)

Enter the value indicated on the label attached to the new DC controller PCB if you have replaced the DC controller PCB or initialized the RAM on the DC controller PCB.

COPIER>OPTION>BODY>W-CLN-P

Use it to set the interval of automatic cleaning of the pre-transfer charging wire in terms of the number of prints.

7.6 Drum Cleaner Unit

7.6.1 Overview

0015-4497

iR5065 / iR 5055 / iR5075 / iR5075N / iR5065N / iR5055N The following shows the components found in the drum cleaner unit:

Wire cleaner Wire

Pre-transfer charging assembly

Pre-transfer charging wire cleaning motor (M7) (toward rear)

(toward front) POST_CLEAN_OUT2 [2]

POST_CLEAN_OUT1 [1]

DC controller PCB J103A

In document Ir5075 Series Sm (Page 196-200)