Brother GT-3 Series User manual

GT-3 Series Service Manual
Please read this manual before making any adjustments.
GARMENT PRINTER
GT-3 Series US suppo sa.com/Garmentprinters/rt homepage http://www.brother-u

This service manual is intended for GT-3 series; be sure to read the GT-3 Series instruction manual before this manual.
Carefully read the “SAFETY INSTRUCTIONS” below and the whole of this manual to understand this product before you start
maintenance.
As a result of research and improvements regarding this product, some details of this manual may not be the same as those
for the product you purchased.
If you have any questions regarding this product, please contact a Brother dealer.
SAFETY INSTRUCTIONS
[1] Safety indications and their meanings
This instruction manual and the indications and symbols that are used on the printer itself are provided in order to ensure safe
operation of this printer and to prevent accidents and injury to yourself or other people. The meanings of these indications and
symbols are given below.
Indications
DANGER The instructions which follow this term indicate situations where failure to follow the
instructions will result in death or serious injury.
WARNING The instructions which follow this term indicate situations where failure to follow the
instructions could result in death or serious injury.
CAUTION The instructions which follow this term indicate situations where failure to follow the
instructions may result in minor or moderate injury.
Symbols
· · · · · This symbol ( ) indicates something that you should be careful of. The picture inside the triangle
indicates the nature of the caution that must be taken.
(For example, the symbol at left means “beware of injury”.)
· · · · · This symbol ( ) indicates something that you must not do.
· · · · · This symbol ( ) indicates something that you must do. The picture inside the circle indicates the
nature of the thing that must be done.
(For example, the symbol at left means “you must make the ground connection”.)
[2] Notes on safety
DANGER
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet
before opening the right side cover. Do not touch the high-voltage area in the control box as high voltage can result
in severe injury.
WARNING
Basic precautions
To prevent accidents and problems, do not modify
the machine yourself.
Brother will not be held responsible for any accidents
or problems resulting from modifications made to the
machine.
Do not handle the power cord with wet hands,
otherwise it may cause electric shocks.
GT-3 Series i

GT-3 Series
ii
WARNING
Installation
Do not set up the printer in a dusty environment. If
dust collects inside the printer, it may cause fire or
electric shocks or problems with correct operation.
Be sure to connect the ground. If the ground
connection is not secure, you run a high risk of
receiving a serious electric shock, and problems with
correct operation may also occur.
Do not bend the cords excessively or fasten them
too hard with staples or anything similar to secure
cords, otherwise there is the danger that fire or
electric shocks could occur.
Printing
If a foreign object gets inside the printer, immediately
turn off the power switch and disconnect the power
cord, and arrange for a service call to resolve.
If you continue to use the printer while there is a
foreign object inside, it may result in fire or electric
shocks or problems with correct operation.
Do not allow the printer to come into contact with
liquids, otherwise it may cause fire or electric shocks
or problems with correct operation.
If any liquid gets inside the printer, immediately turn
off the power switch and disconnect the power cord.
Contact Brother to arrange a service call to resolve.
Do not use the printer when smoke or a bad odor
coming from the printer, otherwise it may cause fire
or electric shocks or problems with correct
operation.
Immediately turn off the power switch and
disconnect the power cord, and arrange for a
service call to resolve.
CAUTION
Environmental requirements
Use the printer in an area which is free from
sources of strong electrical noise such as electrical
line noise or static electric noise.
Sources of strong electrical noise may cause
problems with correct operation.
Any fluctuations in the power supply voltage should
be within ±10% of the rated voltage for the printer.
Voltage fluctuations which are greater than this
may cause problems with correct operation.
The power supply capacity should be greater than
the requirements for the printer’s power
consumption.
Insufficient power supply capacity may cause
problems with correct operation.
The ambient temperature should be within the
range of 18C to 30C during use.
Temperatures which are lower or higher than this
may cause problems with correct operation.
The relative humidity should be within the range of
45% to 85% during use, and no dew formation
should occur in any devices.
Excessively dry or humid environments and dew
formation may cause problems with correct
operation.
Use the printer in a place which is adequately
ventilated.
A slight odor is generated when the printed articles
are being fixed by heat.
In the event of an electrical storm, turn off the
power and disconnect the power cord from the wall
outlet.
Lightning may cause problems with correct
operation.

CAUTION
Installation
Setting up and moving of the printer should only be
carried out by a qualified technician.
The printer machine weighs approximately 111 kg
(245 lb). Transporting and setting up of the printer
should be held in proper way.
The machine may fall down and cause injury.
The printer must be used on a suitable stable
surface, otherwise it may tip over or fall down and
cause injury.
Furthermore, the table that supports the printer
should be at least 137 cm (53.9 inch) in width and
104.5 cm (41.1 inch) in depth, and should be able to
bear a weight of 150 kg (330 lb) or more.
Do not set up the printer in a place where it will be
affected by vibration. It may become unbalanced
and fall down, which cause injury or damage to the
printer.
Do not connect the power cord until setup is
complete, otherwise the printer may operate if the
power switch is turned on by mistake, which could
result in injury.
Do not climb onto the printer or place heavy objects
on top of it, otherwise it may become unbalanced
and tip over or fall down and cause injury.
Printing
This printer should only be used by operators who
are appropriately trained in its operation.
Ensure there is adequate space left for safe working.
The Platen moves forward while operating and it
may be injured.
Do not handle the platen while printing. If your hand
gets caught between the platen or the T-shirt tray
and the covers, it may be injured.
Do not move the Platen by hand.
The Printer may be mechanically and electrically
damaged.
Do not put your hands inside the covers while the
printer’s power is turned on, otherwise your hands
may touch against moving parts and this may result
in injury.
When a problem occurs with the operation of the
printer, contact the place of purchase or a qualified
technician.
Maintenance
Wait at least 1 minute after turning off the power
switch before opening the front cover.
Do not touch the head heat sink as it may be HOT
and may cause a burn.
Be careful not to get your fingers caught when
closing the front cover, otherwise it may result in
injury to your fingers.
Do not move the Platen by hand.
The Printer may be mechanically and electrically
damaged.
Do not disassemble the ink cartridge.
Disassembly, assembly, maintenance and inspection
of this printer should only be carried out by qualified
technicians.
Ask your Brother dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
Turn OFF the power switch and disconnect the
power cable before carrying out the following
operations. The printer may start operating if
incorrectly operated, resulting in possible injury.
- Inspection, adjustment or repair
Turn OFF the power switch before plugging in or
removing the power cord.
Failure to observe this may result in Control Box
malfunction.
Always return any removed safety protection devices
to their original location, and ensure that they are
functioning normally.
Take care not to let the liquids: Ink, Wash Liquid,
Maintenance Solution, Pretreatment or waste liquid
come into contact with your eyes or onto your skin,
otherwise inflammation can result. In case of contact
with eyes, do not rub but immediately rinse the eyes
with water.
Furthermore, do not drink the liquids: Ink, Wash
Liquid, Maintenance Solution, Pretreatment or waste
liquid under any circumstances, as they can cause
vomiting and diarrhea.
Keep the liquids out of the reach of children.
Be sure to wear protective goggles and gloves when
handling the grease, so that they do not get into
your eyes or onto your skin. If the grease gets into
your eyes or onto your skin, inflammation can result.
Furthermore, do not drink or eat the grease. They
may cause diarrhea or vomiting.
Keep the grease out of the reach of children.
When replacing parts and installing optional
accessories, be sure to use only genuine Brother
parts.
Brother will not be held responsible for any
accidents or problems resulting from the use of
non-genuine parts.
GT-3 Series iii

[3] Warning labels
The following warning labels appear on the printer.
Please follow the instructions on the labels at all times when using the printer. If the labels have been removed or are
difficult to read, please contact your nearest Brother dealer.
1
GT-3 Series
iv
2
4
3
5 6
9
10 Watch your fingers, or you may be
injured.
11 High temperature warning display
7
12 Be sure to connect the ground. If
the ground connection is not
secure, you run a high risk of
receiving a serious electric shock,
and problems with correct
operation may also occur.
8

Wash Li
q
uid
Grease
Ink Cartridge Pretreatment (5kg)
Maintenance Solution (5kg)
Pretreatment (20kg)
Waste Ink Tank
0085Y
GT-3 Series v

Table of Contents
1. About GT-3 Series··································1
1-1. Specifications.....................................................1
1-2. Software Specifications.....................................1
1-3. Identifying Your Printer’s Parts..........................2
1-3-1. Front................................................................2
1-3-2. Right................................................................3
1-3-3. Rear.................................................................3
1-3-4. Inside of the Front Cover ..............................4
1-3-5. Upper part of the Maintenance Unit ............5
1-3-6. Under the Platen.............................................6
1-3-7. Control Panel ................................................7
1-3-7-1. Display .......................................................8
1-3-7-2. Menu list.......................................................9
2. Setting up GT-3 Series························11
2-1. Setup Requirements..........................................11
2-1-1. Environment....................................................11
2-1-2. Required Tools...............................................12
2-1-3. Other Requirements.......................................12
2-1-4. Consumable Requirements and Options.....13
2-2. Unpacking..........................................................14
2-2-1. Unpacking Procedure....................................14
2-2-2. Transportation of GT-3...................................15
2-2-3. Installing Waste Ink Tank...............................16
2-2-4. Removing protection materials......................16
2-3. Levelling GT-3....................................................18
2-4. Setting up GT-3 Series......................................19
2-4-1. Installing the Print Heads...............................19
2-5. Preparing your PC.............................................25
2-5-1. When you have GT-541 / GT-782................25
2-5-2. PC preparation: For Windows XP (32 bit)....25
2-5-3. Connection with USB 2.0 Cable:
For Windows XP.......................................................26
2-5-4. Network Settings: For Windows XP..............28
2-5-4-1. Assignment of your computer’s
Address …………………………………… 28
2-5-4-2. Assignment of GT-3’s IP Address .............31
2-5-4-3. GT-3 Setting on the LAN............................33
2-5-5. PC Preparation: For Windows Vista / Windows 7
/ Windows 8 (32 bit / 64 bit)..............................40
2-5-6. Connection with USB 2.0 Cable: Windows Vista
/ Windows 7 / Windows 8.................................41
2-5-7. Network Settings: For Windows Vista / Windows
7 / Windows 8 ..................................................42
2-5-7-1. Assignment of your computer’s
Address..........................................................42
2-5-7-2. Assignment of GT-3’s IP Address .............45
2-5-7-3. GT-3 Setting on the LAN............................47
2-5-8. Troubleshooting ............................................54
2-5-8.1 Windows 7 / Windows 8 will not recognize the
GT-3 Printer Driver after you connect to your PC
with USB cable..................................................54
2-6. Preparation and Check before Use..................60
2-6-1. Installing Ink Cartridge....................................60
2-6-2. Installing Ink....................................................62
2-6-3. Test Print .........................................................65
2-6-4. Head Cleaning................................................67
2-6-5. FiringAdjustment of the Print Heads ............68
2-6-6.Aligning the Print Position of White / Color Print
Heads.................................................................72
3. Operation························································75
3-1. Menu...................................................................75
3-1-1. User Menu /Advanced Menu........................75
3-1-2. Supplementary description of the User
Menu..........................................................................75
3-1-2-1. Test Print....................................................76
3-1-2-2. Maintenance Parts Exchange..................76
3-1-2-3. Tube Cleaning...........................................77
3-1-3. How to go toAdvanced Menu.......................77
3-1-4. List of Advanced Menu..................................77
3-1-5. Description of theAdvanced Menu...............78
3-1-5-1. CR Origin Sensor Adjustment..................78
3-1-5-2. Firmware Update ......................................78
3-1-5-3. Output Check ............................................78
3-1-5-4. Input Check ...............................................78
3-1-5-5. Temperature Adjustment..........................79
3-1-5-6. Solid Print...................................................79
3-1-5-7. Log Level...................................................79
3-1-5-8. Pump Pressure.........................................80
3-2. Firmware Update...............................................82
3-2-1. The difference between GT-3 Firmware
Update (PC) and USB Flash Drive..................82
3-2-2. How to Update from USB Flash Drive..........82
3-2-3. Countermeasure for Cancelled Update........83
3-2-3-1 Confirmation of Cancelled conditions.......83
3-2-3-2. Restart the updates except Main
GT-3 Series

GT-3 Series
program..............................................................83
3-2-3-3. Update with Boot System program..........83
3-2-3-4 Upgrade in Flash ROM writing error.........84
3-3. GT-3 Service Tool..............................................85
3-3-1. Precautions of using GT-3 Service Tool.......85
3-3-2. Resetting "Clean Tube W" Warning..............85
3-3-3. Demonstration Mode......................................86
3-4. Getting Log File and Analysis...........................86
3-4-1. Precautions of getting Log File......................86
3-4-2. Getting Log File..............................................87
3-4-3. View Log File with GT-3 Service Tool...........87
4. Solving Print Quality Problems··89
4-1. Checking the Cause of Misfiring.......................90
4-1-1. Detailed Check Flow......................................91
4-1-2. Heavy misfiring in printing (Checking Cracks
inside the Tube) ...............................................98
4-1-3. Faded Print by Dryness (Changing the
Wipe Frequency)...............................................100
4-1-4. Cleaning the Tubes and Print Heads
(White/Color Tube Cleaning)............................101
5. Regular Maintenance···························106
5-1. Cleaning.............................................................108
5-1-1. Cleaning the Print Head Caps and Wiper
Blades.................................................................108
5-1-2. Cleaning the Print Head Nozzles..................110
5-1-3. White Ink Maintenance..................................112
5-1-4. Cleaning the inside of the printer...................113
5-1-5. Cleaning the Encoder Strip............................113
6. Replacing Parts·········································116
6-1. Replacing the Printer Parts...............................117
6-1-1. Required Tools...............................................117
6-1-2. Assembling/Disassembling the Covers........118
6-1-3. Assembling/Disassembling of the Platen.....123
6-1-4. Platen Belt and Reduction Belt......................128
6-1-5. Adjusting the tension of Platen Belt and
Reduction Belt...................................................133
6-1-6. Platen Motor ...................................................135
6-1-7. Platen Pulley Ball Bearing..............................139
6-1-8. Platen Origin Sensor......................................142
6-1-9. Adjustment of the Platen Sensor Dog...........144
6-1-10. Platen Top Plate and Shoulder Bar............147
6-1-11. Leveling of the Platen Top Plate..................150
6-1-12. Carriage Motor..............................................153
6-1-13. Carriage Driving Parts..................................155
6-1-14. Encoder Strip................................................158
6-1-15. Sensor Flap..................................................162
6-1-16. Assembling / Disassembling of the
Maintenance Unit ............................................165
6-1-17. Wiper Cleaner...............................................171
6-1-18. Checking and Adjusting the Wiper
Blade Assy.........................................................173
6-1-19. Pump Tube...................................................178
6-1-20. Suction Pump Assy......................................183
6-1-21. Replace the Pump Sensor..........................188
6-1-22. Cap Rubber..................................................190
6-1-23. Cassette SW Harness Assy........................192
6-1-24. Sensor for the CL Drive Cam......................194
6-1-25. Motor of the CL Drive Cam..........................196
6-1-26. Wiper Sensor................................................198
6-1-27. Adjusting the Height of Wiper Blade...........200
6-1-28. Adjusting the position of Wiper Blades.......203
6-1-29. Wiper Motor..................................................205
6-1-30. Waste Ink Tubes..........................................206
6-1-31. Solenoid for Head Cleaning ........................211
6-1-32. Ink Supply Mechanism ................................213
6-1-33. Replacing the Filter on the Print Head........220
6-1-33-1. Replacing the Filter for CMYK..............220
6-1-33-2. Replacing the Filter for White...............223
6-1-34. Ink Switch Dog .............................................226
6-1-35. Tubes............................................................232
6-1-36. Needles.........................................................267
6-1-37. Ink Retrieval Unit (GT-381/
GT-361 only) ........................................................273
6-1-38. Print Heads...................................................279
6-1-39. Print Head FFC............................................288
6-1-40. Waste Ink Units............................................292
6-1-41. Exhaust Fan .................................................299
6-1-42. Removing the Needle Felt...........................301
6-1-43. Felts on Cartridge Base...............................307
6-2. Replacing the Electrical Parts...........................309
6-2-1. Precautions in Adjustment.............................309
6-2-2. Control Box, Operation Panel, PCBs............310
6-2-3. Motors, Solenoids, Sensors and Switches...311
6-2-4. Control Box Assy............................................313
6-2-5. Connectors .....................................................314
6-2-6. Connector Locations......................................314
6-2-7. Main PCB Assy..............................................318
6-2-8. EMC Filter.......................................................322
6-2-9. Speaker...........................................................322
6-2-10. Power Unit....................................................323
6-2-11. Surge Absorber PCB Assy..........................324
6-2-12. Control Box Assy..........................................325

GT-3 Series
6-2-13. Panel Body Assy..........................................330
6-2-14. Panel PCB Assy...........................................332
6-2-15. USB Host PCB Assy....................................334
6-2-16. Encoder PCB Assy......................................335
6-2-17. Maintenance PCB Assy...............................336
6-2-18. Carriage PCB Assy......................................337
6-2-19. Ink Sensor PCB Assy..................................339
6-2-20. Ink Switch PCB Assy...................................340
6-2-21. Lithium Battery..............................................342
6-2-22. FFC...............................................................343
7. Transporting the GT-3 Series /
Required Maintenance for Long-term
Storage····································································346
7-1. Transporting the GT-3 Series...........................346
7-2. Required Maintenance for Long-term
Storage .....................................................................350
8. Error Code List··········································354
8-1. Interpreting the Display......................................354
8-2. Warnings............................................................354
8-3. Error Messages .................................................356
9. Block Diagram of the Control
Circuit·······························································365

1. About GT-3 Series
GT-3 Series 1
1. About GT-3 Series
1-1. Specifications
仕様
Printing method Direct-to-Garment Color Inkjet Printer
Dimensions 1370 (W) ×1045 (D) × 660 (H) mm (53.9” × 41.1” × 26.0”)
Machine weight Approx. 111 Kg (245 lb)
Maximum print area 355.6 mm × 406.4 mm (14”x16”)
Ink type Water-based pigment ink
Ink color Up to 5 colors CMYKＷ
(GT-341: 4 colors CMYK, GT-361/GT-381 5 colors CMYKW)
Print head type On demand piezo print head
Number of print heads 4 (GT-341), 6(GT-361), 8(GT-381)
Resolution 600 dpi × 600 dpi, 1200 dpi × 1200 dpi
Print direction Bi-directional, Uni-directional
Output Printer driver (USB cable, File output)
Environment
For storage: Temperature: 32 °F to 104°F (0 °C to 40 °C) Humidity: 20 % to 85 % (no condensation)
Operating your printer: Temperature: 50 °F to 95 °F (10 °C to 35 °C)
Humidity: 45 % to 85 % (no condensation)
For the best print
result: Temperature: 64 °F to 86 °F (18 °C to 30 °C)
Humidity: 45 % to 85 % (no condensation)
Power supply Single-phase100V, 50/60 Hz (JP)
120 V, 50/60 Hz (US)
230 V, 50/60 Hz (EU, Oceania)
Power consumption 0.4 A (average)
Ink cure Conveyor oven (recommended) : 3.5 minutes at 160°C (320°F
Head press: 35 seconds at 180°C (356°F)
Time and temperature may vary depending on which manufacturer’s dryer is
used.
Pretreatment
(GT-361/GT-381) Pretreatment is necessary to print with White ink. Apply either with a roller or a spray, or applying devices in a certain amount of Pretreatment and be sure to
cure with the Heat Press with higher pressure. (35 seconds at 180°C (356°F))
1-2. Software Specifications
Supported OS Latest Windows XP 32bit,
Windows Vista, Wndows 7, Windows 8 (32 bit / 64 bit)
Supported interface USB 2.0, USB flash drive
Minimum system
requirements
256 MB RAM (512 MB or more is recommended)
128 MB free disk space (256 MB or more is recommended)
1 GHz CPU
Recommended Applications
for precise output Adobe Photoshop, Adobe Photoshop Elements, Adobe Illustrator, CorelDRAW, Paint Shop Photo Pro

1. About GT-3 Series
1-3. Identifying Your Printer’s Parts
1-3-1. Front
0043Y
No. Name Description
1 Platen Holds the T-shirt to be printed.
2 Platen Sheet Prevents a T-shirt from slipping so that an image is printed on your desired
position.
3 T-shirt Tray Keeps the T-shirt parts hanging from the Platen (e.g. sleeves) on this
T-shirt Tray.
4 Front Cover Open this to work on the inside of your printer, after you turn OFF the
printer. (If you open the Front Cover while operating, the power
automatically turns off.)
5 Stop Lever Unlocks the lock of the Front Cover. Keep pushing it to release the lock
when you close the Front Cover.
6 Control Panel Indicates the status of the printer. Use this to operate your printer.
See “1-3-7. Control Panel” for the details.
7 Power Switch Turns on/off your printer.
8 Shoulder Bar Adjusts the T-shirt position.
9 USB flash drive Slot Inserts USB flash drive.
10 Ink Cartridge Slots Load the Ink Cartridges of the appropriate color: from the left side W1, W2,
W3, W4, Black (K), Magenta (M), Cyan (C), Yellow (Y).
11 Ink Cartridge Storage Stores the new Ink Cartridges.
12 Guard Bar Keeps the loading space of the Platens.
13 Clearance Sensor
(Obstruction Sensor) Cancels an operation for safety, if it detects obstructions on the Platen. When you lower the platen for printing thicker materials, use Platen Button
on the Control Panel and check the movement if the material does not hit
the flap of the Clearance Sensor. The sensor will not work when the
clearance between the print head and the material is too wide (the platen is
too low). Confirm the platen height by referring "4-5. Placing the T-shirt on
the Platen" in the Instruction Manual.
14 Model Plate Indicates the serial number of the product.
2GT-3 Series

1. About GT-3 Series
1-3-2. Right
0044Y
No. Name Description
1 Exhaust slot The outlet of the Exhaust Fan. Do not cover; Leave the space of 20
cm or more to release the exhaust air.
1-3-3. Rear
0045Y
No. Name Description
1 AC cord socket Inserts AC cord.
2 USB port Inserts USB cable to PC.
3 LAN port Inserts LAN cable to PC.
4 Rear Cover Covers the Platen moving area.
5 Waste Ink Tube Drains the waste ink. Adjust the Tube length so that the Tube should go
straight down into the tank, without hitting the edge at the bottom.
6 Waste Ink Tank Holds the waste ink. Be aware of the room.
GT-3 Series 3

1. About GT-3 Series
1-3-4. Inside of the Front Cover
Cancel any operation, restore the Platens and turn off your printer before opening the Front Cover.
Lift the Front Cover with both hands until the lock is set when opening. Keep pushing the Stop Lever to
release the lock and close the Front Cover with both hands.
<Note>If you open the Front Cover while operating, the power automatically turns off.
0046
Y
0047Y
No. Name Description
1 Print Heads (Front) Jets the Color Ink to the platen.
From the left black, magenta, cyan, and yellow.
2 Print Heads (Back) Jets the White Ink to the platen.
From the left W1, W2, W3 and W4.
3 Filter Cover, Fan Filter,
Exhaust Fan Absorbs ink mist inside the printer. Exchange the Fan Filter inside the Filter Cover at the timing when you exchange Wiper Cleaner. See
"6-1-4. Replacing the Fan Filter" in the Instruction Manual.
4 Roller Felts Protects the roller by wiping off the surface. Exchange the Fan Filter
inside the Filter Cover at the timing when you exchange Wiper
Cleaner. See "6-1-5. Replacing the Roller Felts" in the Instruction
Manual.
5 Carriage Guide Shaft This may be covered with ink mist and dust. Keep Clean to move the
Carriage smoothly. See "5-1-4. Cleaning the inside of the printer".
4GT-3 Series

1. About GT-3 Series
1-3-5. Upper part of the Maintenance Unit
0048Y
No. Name Description
1 Caps (Front: Color side) Cover the surface of the Print Heads and absorb ink in head cleaning.
From the left black, magenta, cyan, and yellow.
2 Caps (Back: White side) Cover the surface of the Print Heads and absorb ink in head cleaning.
From the left W1, W2, W3, and W4.
3 Wipers (Color / White) Wipe off the waste ink on the surface of Print Heads. Keep them clean
for print quality at the timing when you exchange Wiper Cleaner. See
"6-1-2. Replacing the Wiper Cleaner and Cleaning the Caps / Wipers”
in the Instruction Manual.
4 Wiper Cleaner
(Front: Color side)
5 Wiper Cleaner
(Back: White side)
Removes the waste ink on the Wiper. Exchange regularly and keep
them clean for print quality, at the timing when you open the new ink
cartridge or when you see the warning on the display of Control Panel.
Remove the projections of both sides and lift it up. See "6-1-2.
Replacing the Wiper Cleaner and Cleaning the Caps / Wipers" in the
Instruction Manual.
6 Flushing Plate Sponge
Flushing Plate Felt Hold the flushed ink for keeping print quality. Exchange them at the timing when you exchange Wiper Cleaner. See "6-1-3. Replacing the
Flushing Plate Sponge and Flushing Plate Felt" in the Instruction
Manual.
GT-3 Series 5

1. About GT-3 Series
1-3-6. Under the Platen
0049Y
No. Name Description
1 Platen Fixing Lever Fixes the Platen.
Tighten/Loosen this lever to install/uninstall the Platen and to adjust the
Platen height.
<In case [B] that you cannot rotate Platen Fix Lever (1) by hitting the
Platen (3)>
Move the Platen Height Adjustment Lever (2) to the A position in the right
image and loose the Platen Fixing Lever (1). When you pull out the Lever
(1), you can turn it with no load so that move the Lever (1) to
easy-to-operate position. Then tighten the Lever (1) to fix the Platen.
2 Platen Height
Adjustment Lever Adjusts the Platen height. Left most position "A" is the normal T-shirt position.
Check the exact height with Platen Button on Control Panel when you print
on thicker material. The adequate clearance between the Flap Sensor and
the printed material is app. 2 mm. See "4-5. Placing the T-shirt on the Platen”
in the Instruction Manual.
Ink mist may spreads inside the printer If you print with wider clearance, the
ink mist will spread inside the printer and the printing material, and may
damage the sensors.
3 Bush Platen Shaft
4 Platen Positioning Plate Fixes and holds the Platen.
<Note>
You can use Lower-the-Platen Assy (option) when you regularly print thicker material, which can lower the
platen by 13 mm than the standard height. See "4-4-3. Lowering the Platen height" in the Instruction Manual.
6GT-3 Series

1. About GT-3 Series
1-3-7. Control Panel
0050Y
No. Name Description
1 Error Lamp OFF: no errors
ON: one or more errors have been detected. See "8. Error Code List".
2 Power Lamp ON: shows the power is ON.
3 Head Cleaning
Button Cleans all the Print Heads with normal cleaning. (The number of cleaning depends on the model).
4 Platen Button Loads / Ejects the Platen. Press this button when you check the adequate height
of the Platen after you change the height. See "4-5. Placing the T-shirt on the
Platen" in the Instruction Manual.
5 Stop Button Cancels printing or Print Head cleaning.
Returns to Standby mode.
6 Up Button Selects the previous (upper) item. Increases a numeric value. Opens the Menu
display.
7 Down Button Selects the next (lower) item. Decreases a numeric value. Opens the Menu
display.
8 OK Button Executes the selected command. Opens the Menu display. Clears the error
status.
9 Back Button Returns to the previous display. Opens the Menu display.
10 Display Displays the Job Comment of the print data received, the status of the printer, and
the menu items for various settings.
11 Print Button Indicates the print data status and starts the print.
OFF: No print data has been received
Flashing: Receiving a print data
ON: Print data is ready to print.
<Note>
On machine initialization these lamps have a 30-second self check time.
GT-3 Series 7

1. About GT-3 Series
1-3-7-1. Display
The following image indicates that GT-3 has received a print data and ready to print. The Display indicates
Job, printer status and the information needed for printing operations.
01e0026Y
No. Item Shown Description
1 Job Name Shows the indentified name of the print data, which is automatically set by
Printer Driver.
2 Job Comment Shows the 30 characters of the Job Comment set by the operator with
Printer Driver.
3 Amount of Ink
Required Shows how much ink (cc) is required for making one print of the received data.
Shows warning message(s) if necessary.
4 Platen Size Shows Platen Size set by Printer Driver.
5 Number of Platen
Move Shows the number of the Platen Move (loading/unloading) in printing one
print data.
6 Number of Print Shows the number of prints completed of the print data.
7 Printer Status Shows the printer status.
8 Amount of Ink
Remained Shows amount of ink remained in each cartridge, from the left, W1, W2, W3, W4 , Black (K), Magenta (M), Cyan (C) and Yellow (Y).
It flashes when ink is low. Prepare the new cartridge(s).
9 Uni-Directional Print
Icon Shows when the printer or the print data is set to Uni-directional printing.
10 Number of White
Print Head Icon Shows how many White Print Heads are used in printing one print data.
11 Resolution Icon Shows the resolution of the print data.
<Note> When one or more errors are detected, error message(s) will be displayed instead.
8GT-3 Series

1. About GT-3 Series
GT-3 Series 9
1-3-7-2. Menu List
Push either one of the OK Button, Up Button, Down Button and Back Button to go into the Menu.
Menu Content
Head Cleaning
Executes Head Cleaning of either one by one or of all four Print Heads.
See "7-2-2. Cleaning the Print Heads" in the Instruction Manual.
Normal: normal mis-firing
Powerful: After cleaning the Print Head nozzles, when normal head cleaning
does not work.
Test Print
Prints to check mis-firing and print quality.
Nozzle Check CMYK / W: shows mis-firing
Standard Check CMYK / W: shows general print quality
Whiteness: confirms the white quality
Head Test CMYK / W: confirms which print head is broken
Daily Cleaning White Flushes the " thinner and white-less" dull White Ink caused by sinking white pigment. See "6-2-1. Daily Cleaning White for replacing dull White Ink" in the
Instruction Manual.
Print Data Load Reads a print data (AR3 file) in USB flash drive. The inside folder shows with [...].
Print Direction
Sets the print direction. This setting is prior to Printer Driver setting.
Auto：Default Bi-directional, Printer Driver setting is available.
Always Uni-Directional: always prints Uni-directionally.
Always Bi-Directional: always prints bi-directionally. See "7-2-4. Changing the
Print Direction" in the Instruction Manual.
Maintenance
Goes into the Maintenance submenu.
White Tube Cleaning:
Cleans the pigment in White Print Heads and Tubes. See "4-1-4. Cleaning the
Tubes and Print Heads (White/Color Tube Cleaning)".
Load White: Loads White Ink into the Tubes filled with Maintenance Solution
after White Tube Cleaning. See "4-1-4. Cleaning the Tubes and Print
Heads (White/Color Tube Cleaning)".
Initial Cleaning:
Loads ink into the empty new Tubes and Print Heads. CMYK ink is loaded
directly into Tubes. Maintenance Solution is required before White ink.
Maintenance Parts Exchange: See "6-1-2" to "6-1-7" in the Instruction Manual.
Reset CMYK Filter: Resets the warning after you replace K/C or M/Y Filter with
the new.
Nozzle Cleaning: Select this menu when you cannot solve mis-firing. See
"7-2-6. Cleaning the Print Head Nozzles" in the Instruction Manual.
CR Encoder Strip Cleaning:
See “5-1-5. Cleaning the Encoder Strip” or "6-1-7. Cleaning the Encoder
Strip" in the Instruction Manual.
Head Replacement:
See "6-1-38. Print Heads“ or “7-2-7. Replacing the Print Head" in the
Instruction Manual.
Color Tube Cleaning:
See "4-1-4. Cleaning the Tubes and Print Heads (White/Color Tube
Cleaning)"
Log Copy to USB:
See "3-4. Getting Log File and Analysis”.

1. About GT-3 Series
10 GT-3 Series
Menu Content
Printer Setting
Goes into the Printer Setting.
LCD Contrast: Adjusts the Display contrast.
See "3-4-1. Adjusting the Display Contrast" in the Instruction Manual.
Speaker Volume: Adjusts the speaker volume. See "3-4-2. Adjusting the
Speaker Volume" in the Instruction Manual.
Temperature: Sets Fahrenheit / Centigrade. See "3-4-3. Temperature" in the
Instruction Manual.
Auto Cleaning Interval: See "7-2-5. Changing the Auto Cleaning Setting " in the
Instruction Manual.
CR Speed Adjustment: Adjusts the increase/decrease of the Carriage speed.
See "7-2-9. Adjusting the CR Speed" in the Instruction Manual.
Flushing Interval: Adjusts the number of lines (interval) to flush ink in printing.
See "7-2-10. Adjusting the Flushing Interval" in the Instruction Manual.
Flushing Volume: Adjusts the ink volume in flushing. See "7-2-11. Adjusting the
Flushing Volume" in the Instruction Manual.
Daily Cleaning W Setting: Adjusts the amount of White Ink that is flushed in Daily
Cleaning White. See "7-2-12. Adjusting the amount of White Ink in Daily
Cleaning White" in the Instruction Manual.
Auto Job Delete: Deletes the print data automatically after the print number
which is set with Printer Driver is finished. Default is OFF.
GT-341 mode (No White): Sets the printer to stop all the operation of White
Heads. See "6-2-５. Required Maintenance for the Long Storage" in the
Instruction Manual.
Total Print Shows the number of prints.
Platen Reset Restores the Platen.
Language Sets the language shown on the display. See "3-4-4. Language" in the Instruction
Manual.
Version Shows versions of the firmware.

2. Setting up GT-3 Series
2. Setting up GT-3 Series
2-1. Setup Requirements
2-1-1. Environment
[cm]
0051
Y
Locate your printer taking the following into account.
1. The printer in installed in environmentally-acceptable conditions. (Refer to “1. About GT-3 Series”.)
2. Avoid exposure to direct sunlight, dust, extremes of humidity. (Using the humidifier in dry conditions is
strongly recommended for print quality).
3. Never use an extension cable.
4. A working space must be left around the printer.
Minimum space of 100 cm (39.4 inch) on the front and the right. Keep away from the right side of the
Exhaust Fan at least by 20 cm (7.9 inch).
5. The body size is approximately 137 cm × 104.5 cm × 66 cm. (53.9” × 41.1” × 26.0”), and the weight is
approximately 111 kg (245 lb).
6. The table that supports the printer should be at least 137 cm (53.9 inch) in width and 104.5 cm (41.1
inch) in depth, and should be able to bear a weight of 150 kg (330 lb) or more. Its tabletop must be level.
GT-3 Series 11