MIMAKI UCJV300 Maintenance manual

You can also download the latest manual from official website.
MIMAKI ENGINEERING CO., LTD.
https://mimaki.com/ D203178-27
Original instructions

TABLE OF CONTENTS
2
Maintenance
1. Maintenance Precautions ........................................................... 4
2. Maintenance Items and Timing................................................... 5
Items Required for Maintenance........................................................... 5
3. Maintenance Procedure.............................................................. 6
Ink Maintenance ................................................................................... 6
Wiper Cleaning ..................................................................................... 6
Cap Rubber Cleaning ........................................................................... 8
NCU Cleaning....................................................................................... 9
Carriage Underside Cleaning ............................................................. 10
Cleaning the Mist Filter ....................................................................... 11
Ink Discharge Channel Cleaning ........................................................ 12
Media Sensor Cleaning ...................................................................... 13
Media Holder Cleaning ....................................................................... 14
Jam Sensor Cleaning ......................................................................... 14
Platen Cleaning .................................................................................. 15
Cover (Exterior) Cleaning ................................................................... 16
When Not in Use for Extended Periods .............................................. 16
4. Consumable Item Replacement ............................................... 19
Wiper Replacement ............................................................................ 19
Cap Absorber Replacement ............................................................... 20
Mist Filter Replacement ...................................................................... 21
LED Glass Replacement .................................................................... 22
Exhaust Fan Filter Replacement ........................................................ 23
Pinch Roller Replacement .................................................................. 24
Media Holder Replacement ................................................................ 25
Media Cutter Replacement ................................................................. 27
Waste Ink Tank Replacement............................................................. 28
About the Media Cutter....................................................................... 31
Pen Line Replacement ....................................................................... 32

3
Maintenance
To ensure years of precise performance, maintain this product periodically based on frequency of use.
Read the maintenance precautions thoroughly before maintaining this product.

1. Maintenance Precautions
4
1. Maintenance Precautions
• This machine includes parts that must be replaced periodically. We therefore recommend taking
out a maintenance contract. Clean this machine and replace consumable items to prevent
quality defects and accidents.
• Clean periodically. Debris and dust will accumulate on electrical components when this machine
is used for extended periods. There is a risk of failure, electric shock, or fire due to current
leakage.
• Do not clean by blowing—e.g., avoid using air blowers. Doing so may lead to failure, electric
shock, or fire involving the machine if airborne debris or dust gets inside electrical components.
Wipe using a soft cloth soaked in dilute detergent and thoroughly wrung out. A vacuum cleaner
may also be used for cleaning.
• Do not allow liquids to get inside the product. Otherwise there is a risk of failure, electric shock,
or fire.
• The UV-LED unit becomes extremely hot. Do not touch the unit until it cools down after turning
off the LED.
• For heavy soiling, wipe using a soft cloth soaked in dilute detergent and thoroughly wrung out.
• Pay close attention to ventilation and be sure to wear safety glasses, gloves, and a mask when
handling ink, maintenance liquid, waste ink, or other solutions used with this machine. Leaking
ink may adhere to the skin or get into the eyes or mouth.
• Never touch the print head nozzle surface. Do not allow water or alcohol to come into contact
with the print nozzle surface. This will increase the risk of machine failure or printing defects
(e.g., nozzle clogging or deflection).
• Do not use cotton swabs to clean around the head or carriage. Fibers from cotton swabs may
adhere to the head nozzle surface and lead to printing defects (e.g., nozzle clogging or
deflection).
• Be careful to avoid splashing ink or maintenance liquid on the covers. Exposure to splashing ink
or maintenance liquid may damage or deform the cover.
• Do not use benzine, thinner, or any chemical agent containing abrasives. Use of these
chemicals may result in damage to or deformation of parts.
• Do not move the carriage by hand. To move the carriage, use the carriage out function on the
menu.

2. Maintenance Items and Timing
5
2. Maintenance Items and Timing
Timing Item
At the end of the work
day
Clean the wiper and wiper bracket. "Wiper Cleaning"(P. 6)
Clean the wiper cleaner. "Wiper Cleaning"(P. 6)
Clean the cap rubber. "Cap Rubber Cleaning"(P. 8)
Clean the NCU. "NCU Cleaning"(P. 9)
Clean the underside of the UV-LED lamp. "Carriage Underside
Cleaning"(P. 10)
Clean the underside of the carriage. "Carriage Underside Cleaning"(P. 10)
Mist filter 1
Soak up ink with a paper towel. "Cleaning the Mist Filter"(P. 11)
Clean the media sensor. "Media Sensor Cleaning"(P. 13)
Clean the jam sensor. "Jam Sensor Cleaning"(P. 14)
At the end of the work
week
Ink pad in the waste ink holder under the wiper
Soak up ink with a paper towel. "Wiper Cleaning"(P. 6)
Mist filter 2
Soak up ink with a paper towel. "Cleaning the Mist Filter"(P. 11)
Clean the ink discharge channel. "Ink Discharge Channel Cleaning"(P. 12)
Clean the platen. "Platen Cleaning"(P. 15)
Clean the cover (exterior). "Cover (Exterior) Cleaning"(P. 16)
Check the waste ink levels in the waste ink tank.
When noticeably dirty Replace with new exhaust fan filter. "Exhaust Fan Filter
Replacement"(P. 23)
Replace the exhaust fan box.
When not used for
more than a week
Clean the wiper and cap and wash the ink discharge channels. After cleaning,
store without turning off the main power supply. "When Not in Use for
Extended Periods"(P. 16)
Periodically Shake the Ink bottle. "Ink Maintenance"(P. 6)
Items Required for Maintenance
To order replacement consumable items, contact your local dealer or our service office.
For more information on consumable items, refer to our website. https://mimaki.com/supply/inkjet.html
• Avoid storing this product in locations accessible to children.

3. Maintenance Procedure
6
3. Maintenance Procedure
Ink Maintenance
If ink constituents are sedimented, the ink density may become uneven. We recommend shaking the Ink
bottle periodically to keep printing consistent.
UV ink: once a month.
White ink: once a day.
lShake the Ink bottle
1Shake the Ink bottle to the left and right slowly at least 20 times.
• Tighten the ink bottle lid securely, then shake the bottle slowly from left to right to ensure that the
ink moves inside, holding the ink bottle lid with a paper towel.
Repeat the procedure.
• Shake slowly. If the bottle is shaken too violently, ink may leak out or the air mixed in the
ink may cause nozzle clogging.
• If the ink bottle is partially used, tilt it slowly until the ink bottle is upright.
Wiper Cleaning
The wiper wipes off ink adhering to the print head nozzle surface. Continuing to use the dirty wiper may
cause the wiper to which dried ink and dust are attached to rub against the nozzle surface, leading to printing
defects (e.g., nozzle clogging or deflection).
• Be careful to avoid leaving fragments from the cleaning stick behind when cleaning. These
fragments will increase the risk of printing defects (e.g., nozzle clogging or deflection).
1On the LOCAL mode screen, select [MENU] > [Maintenance], then press the [ENTER] key.
• The Maintenance menu is displayed.
2Select [Station] > [Carriage Out] > [Station Maint.], then press the [ENTER] key.
• The carriage moves over the platen.
3Open the front cover.

3. Maintenance Procedure
7
4Remove the wiper.
• Hold the lugs on both sides of the wiper bracket, then pull out the wiper.
Lug
5Clean the wiper and bracket.
• Wipe off any ink and dust adhering using a cleaning stick moistened with maintenance liquid. Wipe
off the maintenance liquid. Make sure none remains.
Wiper
Bracket
• Replace dirty or warped wipers with new ones. "Wiper Replacement"(P. 19)
6Clean the wiper slider.
• Wipe off any ink and dust adhering using a cleaning stick moistened with maintenance liquid. Wipe
off the maintenance liquid. Make sure none remains.
7Reattach the wiper at the original position.
Lug

3. Maintenance Procedure
8
8Cleaning the wiper cleaner.
• Wipe off any ink and dust adhering using a cleaning stick moistened with maintenance liquid. Wipe
off the maintenance liquid. Make sure none remains.
Wiper cleaner
• Only clean the front side of the wiper cleaner. There is no need to clean the backside.
• Do not remove the wiper cleaner from the bracket.
• After cleaning is completed, check to confirm that the wiper cleaner is not facing up.
OKOK No goodNo good
• Soak up ink in the waste ink holder with a paper towel once a week. Doing so may result
in leaking ink.
• Do not remove the absorbent material in the absorbent material case. Doing so may result
in leaking ink.
9Once cleaning is complete, close the cover, then press the [ENTER] key.
Cap Rubber Cleaning
The cap prevents the print head nozzle surface from drying out. Continuing to use a dirty cap may affect ink
take-up and lead to print defects (e.g., nozzle clogging, deflection).
• Be careful to avoid leaving fragments from the cleaning stick behind when cleaning. These
fragments will increase the risk of printing defects (e.g., nozzle clogging or deflection).
1On the LOCAL mode screen, select [MENU] > [Maintenance], then press the [ENTER] key.
• The Maintenance menu is displayed.

3. Maintenance Procedure
9
2Select [Station] > [Carriage Out] > [Station Maint.], then press the [ENTER] key.
• The carriage moves over the platen.
3Open the front cover.
4Clean the cap rubber.
• Wipe off any ink and dust adhering using a cleaning stick moistened with maintenance liquid. Wipe
off the maintenance liquid. Make sure none remains.
Cap rubber
5Check to confirm that the cap slider is not tilted once cleaning is complete.
• If the cap slider is tilted, move the slider block to the left or right to correct the tilt.
6Close the front cover, then press the [ENTER] key.
NCU Cleaning
The NCU uses a sensor to monitor the ink droplets ejected from the print head nozzles. Continuing to use
the dirty NCU may prevent the nozzle check function from operating correctly.
• Be careful to avoid leaving fragments from the cleaning stick behind when cleaning. These
fragments will increase the risk of printing defects (e.g., nozzle clogging or deflection).
1On the LOCAL mode screen, select [MENU] > [Maintenance], then press the [ENTER] key.
• The Maintenance menu is displayed.
2Select [Station] > [Carriage Out] > [Station Maint.], then press the [ENTER] key.
• The carriage moves over the platen.
3Open the front cover.

3. Maintenance Procedure
10
4Clean the NCU.
• Wipe off any ink and dust adhering using a cleaning stick moistened with maintenance liquid. Wipe
off the maintenance liquid. Make sure none remains.
• Insert the cleaning stick as far as the line shown in the illustration.
5Once cleaning is complete, close the cover, then press the [ENTER] key.
Carriage Underside Cleaning
The underside of the carriage becomes coated with ink wiped off by the wiper. Continuing to use the dirty
carriage underside will rub dried ink and attached dust on to the media, resulting in contaminated prints.
The print head uses an extremely delicate mechanism. Take great care when handling it.
• Be careful to avoid leaving fragments from the cleaning stick behind when cleaning. These
fragments will increase the risk of printing defects (e.g., nozzle clogging or deflection).
1On the LOCAL mode screen, select [MENU] > [Maintenance], then press the [ENTER] key.
• The Maintenance menu is displayed.
2Select [Station] > [Carriage Out] > [Head Maint.], then press the [ENTER] key.
• The carriage moves to the maintenance space.
3Open the maintenance covers.

3. Maintenance Procedure
11
4Clean the UV-LED lamp.
• Wipe off any ink adhering using a cleaning stick moistened with maintenance liquid. Wipe off the
maintenance liquid. Make sure none remains.
5Clean around the print head.
• Wipe off any ink and dust adhering using a cleaning stick moistened with maintenance liquid. Wipe
off the maintenance liquid. Make sure none remains.
Clean the print head sides (dark red area) using
a cleaning stick.
Never touch the nozzle
surface!
Clean using a cleaning stick or soft cloth.
• Never touch the print head nozzle surface.
6Once cleaning is complete, close the cover, then press the [ENTER] key.
Cleaning the Mist Filter
The mist filter absorbs the mist generated when ink droplets are discharged from the print head. Continuing
to use it when it is dirty will result in contaminated prints.
Mist filter 1
Mist filter 2
1On the LOCAL mode screen, select [MENU] > [Maintenance], then press the [ENTER] key.
• The Maintenance menu is displayed.

3. Maintenance Procedure
12
2Select [Station] > [Carriage Out] > [Head Maint.], then press the [ENTER] key.
• The carriage moves to the maintenance space.
3Open the maintenance covers.
4Remove the mist filter.
• To remove the mist filter, pull the knob to the front while pushing the tabs in the direction indicated
by the arrow.
Claw
Handle
Handle
Claw
5Clean the filter.
• Remove the filter and press down on it with a paper towel to remove dirt.
• Wipe off the dirt adhering to the filter case.
• Replace the mist filter if it gets very dirty—for example, due to liquefaction of ink adhering
to the filter.
"Mist Filter Replacement"(P. 21)
6Reattach the mist filter in its original position.
7Once cleaning is complete, close the cover, then press the [ENTER] key.
Ink Discharge Channel Cleaning
Clean the ink discharge channel regularly to prevent clogging of the ink discharge channel below the cap.

3. Maintenance Procedure
13
1On the LOCAL mode screen, select [MENU] > [Maintenance], then press the [ENTER] key.
• The Maintenance menu is displayed.
2Select [Station] > [Disway Wash], then press the [ENTER] key.
• The carriage moves over the platen.
• “Fill the Liquid. Exit Next [ENT]” appears on the display.
3Open the front cover.
4Fill the cap with maintenance liquid.
• Use a syringe to draw up some maintenance liquid and fill it until it almost overflows from the cap.
5Close the front cover, then press the [ENTER] key.
• Pump tube (ink discharge channel below the cap) washing starts.
Media Sensor Cleaning
Media sensors are located on the rear cover and carriage underside. The media cannot be detected
correctly if dust or debris accumulates on the sensors. Remove any debris using cotton swabs or a soft cloth.
Rear of product Carriage underside
lCleaning the carriage underside sensor
1On the LOCAL mode screen, select [MENU] > [Maintenance], then press the [ENTER] key.
• The Maintenance menu is displayed.
2Select [Station] > [Carriage Out] > [Head Maint.], then press the [ENTER] key.
• The carriage moves to the maintenance space.

3. Maintenance Procedure
14
3Open the maintenance covers.
4Clean the media sensor.
5Once cleaning is complete, close the cover, then press the [ENTER] key.
Media Holder Cleaning
• Turn off the main power and unplug the power cable before carrying out maintenance.
• Do not allow liquids to get inside the product. Otherwise there is a risk of failure, electric shock,
or fire.
Continuing to use the dirty platen will prevent proper feeding of the media. It will also cause dried ink and
attached dust to rub against the head nozzle surface and lead to print defects (e.g., nozzle clogging,
deflection).
Media holder
• For heavy soiling, wipe using a soft cloth soaked in dilute detergent and thoroughly wrung out.
Jam Sensor Cleaning
The jam sensor is located on the side of the UV-LED unit on the right side of the carriage. If ink stains or dust
accumulate in the sensor unit, it may cause a media jam. Clean it with paper towels.
1On the LOCAL mode screen, select [MENU] > [Maintenance], then press the [ENTER] key.
• The Maintenance menu is displayed.
2Select [Station] > [Carriage Out] > [Head Maint.], then press the [ENTER] key.
• The carriage moves to the maintenance space.

3. Maintenance Procedure
15
3Open the front cover and maintenance cover.
4Clean the jam sensor unit.
• Clean the Jam Sensor from both the front cover side and the maintenance cover side, focusing on
the lower part of the Jam Sensor.
• Wipe off the ink and dust with a paper towel moistened with maintenance fluid. Clean After the,
Wipe off the maintenance liquid.
Clean the jam sensor unit.
5Once cleaning is complete, close the cover, then press the [ENTER] key.
Platen Cleaning
• Turn off the main power and unplug the power cable before carrying out maintenance.
• Do not allow liquids to get inside the product. Otherwise there is a risk of failure, electric shock,
or fire.

3. Maintenance Procedure
16
Continuing to use the dirty platen will prevent proper feeding of the media. It will also cause dried ink and
attached dust to rub against the head nozzle surface and lead to print defects (e.g., nozzle clogging,
deflection).
• The grooves in which the media holder slides and the media is cut are susceptible to dust
accumulation. Remove any debris carefully.
• For heavy soiling, wipe using a soft cloth soaked in dilute detergent and thoroughly wrung out.
Cover (Exterior) Cleaning
• Do not allow liquids to get inside the product. Otherwise there is a risk of failure, electric shock,
or fire.
• For heavy soiling, wipe using a soft cloth soaked in dilute detergent and thoroughly wrung out.
When Not in Use for Extended Periods
Clean as follows if the product is not used for one week or longer:
Check beforehand
Is [Near End] or [Ink End] displayed?
• Maintenance liquid and ink is aspirated during the washing operation. Washing is not possible if an
error occurs during this process. Replace with new ink.
1On the LOCAL mode screen, select [MENU] > [Maintenance], then press the [ENTER] key.
• The Maintenance menu is displayed.
2Select [Station] > [Custody Wash], then press the [ENTER] key.
• The carriage moves over the platen.

3. Maintenance Procedure
17
3Open the front cover.
4Clean the wiper and bracket.
• "Wiper Cleaning"(P. 6)
5Press the [ENTER] key once cleaning is complete.
• “Cap Cleaning Completed (Next)[ENT]” appears on the display.
6Clean the cap rubber.
• "Cap Rubber Cleaning"(P. 8)
7Once cleaning is complete, close the cover, then press the [ENTER] key.
• “Fill the Liquid. Exit Next [ENT]” appears on the display.
8Fill the cap with maintenance liquid.
• Use a syringe to draw up some maintenance liquid and fill it until it almost overflows from the cap.
9Close the front cover, then press the [ENTER] key.
• Print nozzle washing starts. The elapsed time is displayed on the display. Nozzle washing takes
approximately one minute.
• Cleaning is performed automatically once print nozzle washing has ended.
• “Fill the Liquid. Exit Next [ENT]” appears on the display.
10 Open the front cover.
11 Fill the cap with maintenance liquid.
• Use a syringe to draw up some maintenance liquid and fill it until it almost overflows from the cap.
12 Close the front cover, then press the [ENTER] key.
• Pump tube (ink discharge channel below the cap) washing starts.

3. Maintenance Procedure
18
• Do not turn off the main power supply. Turning off the main power supply will disable the
automatic maintenance function (including nozzle clogging prevention function and ink
discharge channel cleaning function). This will increase the risk of print defects (e.g., nozzle
clogging, deflection).
• Do not leave media loaded on the platen. This may leave irregularities or ripples in the media.
• When this product is not in use, raise the clamp lever to separate the pinch rollers from the grid
rollers. Leaving the pinch rollers in the lowered position for an extended period of time may
cause the pinch rollers to become deformed. Deformation of the pinch rollers may prevent the
media from being fed correctly.
• Perform the following if the “Check Waste Ink Tank” message appears on the display.
"Waste Ink Tank Replacement"(P. 28)

4. Consumable Item Replacement
19
4. Consumable Item Replacement
To order replacement consumable items, contact your local dealer or our service office.
For more information on consumable items, refer to our website. https://mimaki.com/supply/inkjet.html
• When disposing of the product, contact an industrial waste disposal operator or dispose of the
product in accordance with the local laws and regulations.
• Avoid storing this product in locations accessible to children.
Wiper Replacement
This product maintains a count of the number of wiping cycles. The “Replace Wiper” message appears when
a preset count is reached. Replace dirty or warped wipers with new ones.
1“Replace Wiper” appears on the display.
2On the LOCAL mode screen, select [MENU] > [Maintenance], then press the [ENTER] key.
• The Maintenance menu is displayed.
3Select [Station] > [Replace Wiper], then press the [ENTER] key.
• The carriage moves over the platen.
4Open the front cover.
5Remove the wiper.
• Hold the lugs on both sides of the wiper bracket, then pull out the wiper.
Lug
6Clean the wiper slider.
• Wipe off any ink and dust adhering using a cleaning stick moistened with maintenance liquid. Wipe
off the maintenance liquid. Make sure none remains.

4. Consumable Item Replacement
20
7Mount a new wiper.
Lug
8Once replacement is complete, close the cover, then press the [ENTER] key.
• The wiper usage count is reset.
Cap Absorber Replacement
This product maintains a usage count. The “Replace Cap Absorber” message appears on the display when a
preset count is reached. (This is supported in firmware version 2.5 and later.)
If the cap absorber is very dirty or if ink drips on to the media, replace with a new cap absorber.
1The “Replace Cap Absorber” message appears on the display.
2On the LOCAL mode screen, select [MENU] > [Maintenance], then press the [ENTER] key.
• The Maintenance menu is displayed.
3Select [Station] > [Carriage Out] > [Station Maint.], then press the [ENTER] key.
• The carriage moves over the platen.
• The cap absorber usage count is reset.
4Turn off the power.
5Open the front cover.
6Remove the cap absorber.
• Push up the two tabs at the front to remove the cap absorber.
Cap absorber
• Avoid ink dripping when removing the cap absorber.