Brother Gt3 Manual

 
 
GT-3 Series 
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7. Troubleshooting 
 
CAUTION 
 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 seriously damaged by this. 
 Do not put your hands inside the covers while the printe r’s power is turned on, otherwise...

 
 
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7-1. Solving Printer Problems 
Use the table below to help solve printer problems. 
Problem Cause Solution 
Cannot send print data from the 
PC. You have selected the wrong 
printer.  Confirm the selected printer, and select the correct 
one.  
 
USB cable not connected  Disconnect  and re-connect the USB 2.0 cable   
 Your PC and OS do not satisfy 
the requirements of GT-782.  See “1-3-3. Software Information and check your PC 
properties.  
 
Using an USB cable...

 
 
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Problem Cause Solution 
GT-3 does not turn on. There is no power. Check the power cable connections. 
  The Front Cover is open or not 
closed properly.  Close the Front Cover properly.   
An error occurred just after 
turning on GT-3. 
An error occurred. 
Check the error code with 7-4. Error Messages and 
restart GT-3. If the error is not cleared, please contact 
Brother or your dealer. 
GT-3 cannot read data from 
USB flash drive.  No USB flash drive is...

 
 
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7-2. Solving Print Quality Problems 
Use the table below to solve print quality problems. 
Problem Cause Solution 
The graphic applications’ 
settings are not appropriate. 
Maybe CYMK mode is being 
used for data. See “4-2 Setting the Applications’ Print Condition and 
modify the artwork. 
The print condition is not 
appropriate. (less saturation) 
See “4-3. Setting the Printer Driver Condition” and 
select proper Color Processing to adjust saturation 
and...

 
 
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Problem Cause Solution 
The outlines of printed image 
are not clear, or texts and 
outlines are printed doubled. The Platen height may be wrong 
with a too large gap. 
Adjust the Platen height to make the clearance 
between the Clearance Sensor and the surface of the 
Print Heads app. 2 mm. See 4-5. Placing the T-shirt 
on the Platen. When Platen Lowering Set (option) 
is used, put them back to the original parts or lay 
something on the Platen. 
Print Heads...

 
 
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7-2-1. Procedure for Solving the Print Quality Problems 
Follow the procedure (Step 1 to 7) below until the print quality problem is solved. 
 
The following steps are shown with CMYK Print Heads and do the same in case of White Print Heads.   
 
Step 1: Confirm the amount of remaining Ink in the Ink Cartridge and execute Normal Cleaning. 
Head Cleaning, with flushing fresh ink, can solve most of print quality problems. Check the nozzles by test printing of Nozzle...

 
 
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Step 4: Confirm the conditions of mis-firing.   
(1)  Print the Nozzle Check Pattern, and check which Print Head has the problem (see 7-2-3. Checking Print Quality with 
Nozzle Check Pattern ). 
(2)  If the missing positions (nozzles) are  fixed, then go to Step 5. If the missing posit ion shift every time you print Nozzle 
Check Pattern, then maybe some tiny air bubbles are in t he Print Head Nozzles. Execute Powerful Cleaning and confirm 
with Nozzle Check...

 
 
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7-2-2. Cleaning the Print Heads 
Your printer automatically cleans its Print Heads every 24 prints (you can change the frequency; see “7-2-5. Changing the 
Auto Cleaning Setting”), or when your printer has not been used  for more than two hours. The auto-cleaning starts when you 
press the Print Button in these situations. However, t he auto-cleaning may not be enough and cannot solve print quality 
problems (e.g. stripes/ banding appears on the printed image)....

 
 
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(3)  Place a sheet of paper (A4 or letter size) at the right corner of the Platen as shown below. Use adhesive tape to make the 
paper flat. You can use a T-shirt instead of paper.   
 
 
Paper of A4/ Letter size  
 
 
 
 
 
 
 
 
 
 
 
0081Y 
 
(4)  Select [ Test Print ] with the Up/Down Bu tton from the menu and then press the OK Button. 
(5)  Press the Up/Down Button to select either “Nozzle Ch eck CMYK”, or Nozzle Check White and then press the OK 
Button. The...

 
 
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White:  
Like CMYK shown in the previous page, the Print Heads of W1 W2 (GT-381: one in W1, two in W2) have the problem. 
The Print Heads need to be cleaned (better to execute [ All Whites] , see “7-2-2. Cleaning the Print Heads”). 
     
 
 
 
GT-3 has multiple White Heads (4 on GT-381, 2 on GT-361) and mis-firing is not so severe compared with the one 
with CMYK Print Heads. See the left print result on paper and  some of the nozzles are not fired, but the...