Toshiba Tec Bev4g Manual

							3. REPLACING THE IMPORTANT PARTS EO18-33025 
(Revision Date: Mar. 27, 2009) 
3.4 Replacing the Platen Ass’y
 
3-9 
3.4 Replacing the Platen Ass’y 
1.  Refer to section 3.1 to open the top cover. 
2.  Release the platen holder tabs from the lower inner cover and vertically raise them. 
3.  Remove the platen ass’y. 
 
 
 
 
 
 
 
 
 
4.  Replace the platen ass’y with a new one, then reassemble in the reverse order of 
removal. 
 
 
 
5.  After replacing, perform a diagnostic test print or print a sample label to make sure the 
printer performs correctly for the following points. 
 •  The label is issued correctly. 
 •  No noise is generated during the print operation. 
 •  None of blurred print, smudge, etc. is generated. 
 
 
 
Platen Holder Tab
Platen Ass’y  
						

							3. REPLACING THE IMPORTANT PARTS EO18-33025 
(Revision Date: Mar. 27, 2009) 
3.5 Replacing the Print Head Ass’y
 
3-10 
3.5 Replacing the Print Head Ass’y 
 
 
 
 
3.5.1 B-EV4T model 
1.  Refer to section 3.1 to open the top cover. 
2.  Open the ribbon access cover. 
 
 
 
3.  Remove the two screws which secure the print head ass’y. 
 
 
 
 
 
Ribbon Access  Cover
Screw 
CAUTION! 
1.  NEVER touch the element when handling the Print Head. 
2.  NEVER touch the connector pins to avoid a breakdown of the Print Head by static 
electricit
y.  
Print Head Ass’y
Screw  
						

							3. REPLACING THE IMPORTANT PARTS EO18-33025 
(Revision Date: Mar. 27, 2009) 
3.5 Replacing the Print Head Ass’y
 
3-11 
4.  Remove the connector from the print head ass’y. 
5.  Remove the print head ass’y. 
 
 
 
6.  Replace the print head ass’y with a new one, then reassemble in the reverse order of 
removal. 
 
             [ Print head element side ]             [ Print head bracket side ] 
    
 
 
NOTE:  Do not disassemble the print head assy which contains the bracket and the spring 
plate. 
7.  After replacing, perform a diagnostic test print or print a sample label to make sure the 
printer performs correctly for the following points. 
 •  Printing is performed correctly. 
 •  None of dot missing is generated. 
 •  None of blurred print, stain, chipped bar code or characters, wrinkle, smudge, 
uneven print, etc. is generated. 
 •  Reading the bar code is possible. 
  
 
Connector
Print Head Ass’y 
Spring Plate 
Bracket 
						

							3. REPLACING THE IMPORTANT PARTS EO18-33025 
(Revision Date: Mar. 27, 2009) 
3.5 Replacing the Print Head Ass’y
 
3-12 
3.5.2 B-EV4D model 
1.  Refer to section 3.1 to open the top cover. 
2.  The print head block is secured to the top inner cover with the latches. 
Push both sides of the bracket and pull the print head block. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Bracket
Print Head Block
Top Inner Cover
Latch 
						

							3. REPLACING THE IMPORTANT PARTS EO18-33025 
(Revision Date: Mar. 27, 2009) 
3.5 Replacing the Print Head Ass’y
 
3-13 
3.  Remove the two pins which secure the print head ass’y. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4.  Remove the connector from the print head ass’y. 
5.  Remove the print head ass’y. 
 
 
 
 
 
 
 
 
 
 
 
 
NOTE:  Do not bend or damage the spring plates when removing and reassembling the 
print head ass’y. 
 
 
 
 
 
 
 
 
 
 
Pin 
Print Head Ass’yPin
ConnectorPrint Head Ass’y
Print Head Ass’y
Spring Plate  
						

							3. REPLACING THE IMPORTANT PARTS EO18-33025 
(Revision Date: Mar. 27, 2009) 
3.5 Replacing the Print Head Ass’y
 
3-14 
6.  Replace the print head ass’y with a new one, then reassemble in the reverse order of 
removal. 
 
             [ Print head element side ]             [ Print head bracket side ] 
    
 
 
Be careful of the following points when reassembling the print head ass’y.    Hook both 
openings on the bracket to the bosses.    It is easy to assemble the bracket by hooking one 
opening at a time.    Also, do not touch or scratch the print head element. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NOTE:  Do not disassemble the print head assy which contains the bracket and the spring 
plate. 
7.  After replacing, perform a diagnostic test print or print a sample label to make sure the 
printer performs correctly for the following points. 
 •  Printing is performed correctly. 
 •  None of dot missing is generated. 
 •  None of blurred print, stain, chipped bar code or characters, wrinkle, smudge, 
uneven print, etc. is generated. 
 •  Reading the bar code is possible. 
 
Spring Plate 
Bracket
BossBracketBracket
Head 
Element  
						

							
3. REPLACING THE IMPORTANT PARTS EO18-33025 
(Revision Date: Mar. 27, 2009) 
3.6 Replacing the Stepping Motor
 
3-15 
3.6 Replacing the Stepping Motor 
1.  Refer to section 3.2 to remove the lower cover. 
2.  Disconnect the stepping motor connector from the main board. 
3.  Use the Phillips screwdriver to remove the 2 screws. 
 
 
 
 
 
4.  Remove the stepping motor.    The plasti c parts for mounting the stepping motor and 
thermistor appear. 
 
 
 
 
 
 
 
 
 
 
SM-3x10 Screw
Stepping Motor
Stepping Motor 
Connector (JP14) 
Thermistor  
203 DPI model 
motor mounting 
location 300 DPI model 
motor mounting 
location  
						

							3. REPLACING THE IMPORTANT PARTS EO18-33025 
(Revision Date: Mar. 27, 2009) 
3.6 Replacing the Stepping Motor
 
3-16 
5.  Replace the stepping motor with a new one, then reassemble in the reverse order of 
removal.    Be sure to apply FLOIL to the gear when reassembling. 
 
 
 
NOTE:  
Make sure that the stepping motor is mounted in the correct position and the thermal 
conductive grease is applied to the thermistor to keep good contact with the stepping 
motor case. 
 
6.  After replacing, perform a diagnostic test print or print a sample label to make sure the 
printer performs correctly for the following points. 
 •  Printing is performed correctly. 
 •  No noise is generated during the print operation. 
 
 
LUBRICATION
Gear: FLOIL 
						

							3. REPLACING THE IMPORTANT PARTS EO18-33025 
(Revision Date: Mar. 27, 2009) 
3.7 Replacing the Gear Cover
 
3-17 
3.7 Replacing the Gear Cover 
1.  Refer to section 3.2 to remove the lower cover. 
2.  Use the Phillips screwdriver to remove the 4 screws. 
3.  Remove the gear cover. 
4.  Remove the each gear. 
 
 
 
 
NOTE:  Between 200 dpi printer and 300 dpi printer, the number of gears and the position 
of the motor pulley differ.    Be careful of the orientation of the gear when replacing. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SM-3x6 Screw
Gear Cover 
LUBRICATION
Gear: FLOIL
300dpi model 
200dpi model
 
LUBRICATION
Gear: FLOIL
Motor Pulley
Motor Pulley 
						

							3. REPLACING THE IMPORTANT PARTS EO18-33025 
(Revision Date: Mar. 27, 2009) 
3.7 Replacing the Gear Cover
 
3-18 
5.  Replace the gear cover and the each gears with a new one, then reassemble in the 
reverse order of removal.    Be sure to apply FLOIL to the gear when reassembling.