Brother GT-341 Instruction Manual page 150

7. Troubleshooting
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").
<Note>
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 actual print quality on the right print on pretreated T-shirt is enough.
One or two Mis-firing with each Print Head (left) but the normal print (right) is OK.
Execute Head Cleaning if you have the print as shown in the below:
Left: Several continuous nozzles are missing like a "band" with GT-381.
Right: The same position in the multiple Print Heads are missing (W1 and W3) with GT-381.
140 GT-3 Series