Toshiba Bsx4t Manual

							8. PERIODIC MAINTENANCE PROCEDURE EO18-33012A 
8. PERIODIC MAINTENANCE PROCEDURE 
 
8- 4 10. Conduct the following tests and make sure that there is no problem. 
(1) Print test with TOSHIBA TEC-approved media and ribbon.  (Print tone, print head position, 
etc.) 
(2) Paper skew 
 When the Strip Module is used; 
 If the label skews when using the built-in Rewinder unit, turn the adjustment knob of the 
rewinder guide plate to correct the label feed.  Clockwise turn moves the rewinder guide plate 
forward and counterclockwise turn moves it backward. 
· When labels skew to the right: 
 Loosen the SM-4x8 screw with a phillips-head screwdriver.  Turn the adjustment knob 
clockwise, and tighten the SM-4x8 screw when the rewinder guide plate is positioned 
correctly. 
· When labels skew to the left: 
 Loosen the SM-4x8 screw with a phillips-head screwdriver.  Turn the adjustment knob 
counterclockwise, and tighten the SM-4x8 screw when the rewinder guide plate is 
positioned correctly. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(3) Print start position adjustment (Horizontal: media position, vertical: sensor 
adjustment/adjustment by issuing commands.) 
(4) Communication test 
(5) Abnormal noise 
(6) Confirm that there are not any other errors. 
11. Close the top cover. 
12. Clean the outside of the printer. 
13. Fill out a report form.  Hand it to the manager and obtain a signature.  Adjustment Knob SM-4x8 Screw  
						

							9. TROUBLESHOOTING EO18-33012A 
9. TROUBLESHOOTING 
 
9- 1 9. TROUBLESHOOTING 
Problems Cause Solution Power does not 
turn ON. 1. Input voltage to the printer is not 
within the rated voltage. (Check by 
CN1 on the PS unit.) 
2. Output voltage from the printer is 
not within the rated voltage.  [Check 
that the voltage between +24V pins 
(1, 2 and 6) and PG pins (3, 7 and 
8) of CN4 on the PS unit is 24V.  
And check that the voltage between 
+5V pin (5) and SG pin (4) is 5V.] 
3. No voltage to the MAIN PC board.  
[Check that the voltage between 
+27V pins (1, 2 and 6) and PG pins 
(3, 7 and 8) of CN501 on the MAIN 
PC board is 24V.  And check that 
the voltage between +5V pin (5) and 
LG pin (4) is 5V.] 
4. Failure of MAIN PC board.  Replace the power cable or power 
inlet.  
 
Replace the PS unit. 
 
 
 
 
 
 
Replace the power harness. 
 
 
 
 
 
 
Replace the MAIN PC board.  LED or LCD does 
not light. 1. Failure of the panel PC board or 
operation panel 
2. Failure of the operation panel 
harness 
3. Failure of the MAIN PC board Replace the panel PC board or 
operation panel. 
Replace the operation panel harness. 
Replace the MAIN PC board.  Poor printing 1. Poor media quality. 
 
2. Dirty print head 
3. The print head block is not set 
completely.  Use the media approved by 
TOSHIBA TEC. 
Clean the print head. 
Close the print head block 
completely.  Printer does not 
print.  1. Print head failure 
2. Connection of the print head 
connector is incomplete, a bad 
contact, or broken elements. 
3. Failure in rewinding/feeding of the 
ribbon. 
4. Failure of the MAIN PC board. 
5. Failure of the software 
6. Failure of the printer cable.  Replace the print head. 
Connect the harness completely, or 
replace the harness. 
 
Replace the ribbon take-up motor, 
ribbon feed motor or MAIN PC board. 
Replace the MAIN PC board. 
Check the program. 
Replace the printer cable.  Dot missing 1. Broken print head element 
2. Broken print head cable wires 
3. Failure of the MAIN PC board Replace the print head. 
Replace the print head harness. 
Replace the MAIN PC board. Blurred print 1. Poor media quality. 
 
2. Dust is on the media. Use only TOSHIBA TEC-approved 
media. 
Clean the print head and remove any 
dust from the media.  
						

							9. TROUBLESHOOTING EO18-33012A 
9. TROUBLESHOOTING 
 
9- 2 Problems Cause Solution Ribbon wrinkle 1. Poor ribbon quality. 
 
2. Ribbon is not rewound or fed 
smoothly. Use only TOSHIBA TEC-approved 
ribbon.  
Replace the ribbon rewind motor or 
ribbon feed motor.  Media feed failure 1. Media is not set properly. 
2. Poor media quality 
 
3. Improper adjustment of the feed gap 
sensor or black mark sensor. 
4. Threshold is improper.  
5. Failure of the feed gap sensor or 
black mark sensor 
6. The cutter mechanism is not 
installed properly. 
7. Failure of the stepping motor. Set the media properly. 
Use the media approved by 
TOSHIBA TEC. 
Re-adjust the sensor.  
 
Set the threshold correctly. 
Replace the feed gap sensor or black 
mark sensor.  
Install the cutter module properly.  
 
Replace the stepping motor or MAIN 
PC board.  Communication 
error 1. Failure of the communication cable 
2. Failure of the RS-232C connector 
3. Failure of the communication 
connector 
4. Failure of the PC or application 
software 
5. Failure of the MAIN PC board Replace the cable. 
Replace the connector 
Replace the connector. 
 
Modify the program. 
 
Replace the MAIN PC board.   
  
						

							10. MAJOR UNIT REPLACEMENT EO18-33012A 
10.1 POWER SUPPLY UNIT 
 
10- 1 10. MAJOR UNIT REPLACEMENT 
 
 
 
NOTE: Be sure to disconnect all cables of the printer from the PC and the option devices. 
Never remove the screws fixing the printer block. (See Caution in Section 3.) 
 
10.1 POWER SUPPLY UNIT 
1) Remove the side panel (L). (Refer to Section 3.2.) 
2) Disconnect the power supply harness from CN19 on the Main PC board. 
3) Remove the SMW-3x6 and the two SMW-4x6 screws to detach the power supply unit from the 
printer. 
 
 
 
 WARNING! Turn the power off and disconnect the power cord before replacing the main parts. 
Power Supply Unit 
SMW-3x6 Screw  SMW-4x6 Screw CN19  Main PC Board   SMW-4x6 Screw  
						

							10. MAJOR UNIT REPLACEMENT EO18-33012A 
10.1 POWER SUPPLY UNIT 
 
10- 2 4) Disconnect the power harness from the power supply unit.  
5) Replace the power supply unit with a new one, then reassemble in the reverse order of removal. 
 
 
 Power Supply Unit  Power Harness  
						

							10. MAJOR UNIT REPLACEMENT EO18-33012A 
10.2 MAIN PC BOARD
 
 
10- 3
 
10.2  MAIN PC BOARD 
1)  Remove the side panel (L). (Refer to Section 3.2.) 
2)  For the B-SX5T series, remove the expansion I/O board. (Refer to Section 4.) 
3)  Disconnect all the cables from the MAIN PC board. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NOTE:  The cables are connected to the following connectors as standard (without option). 
B-SX4T: CN8, 9, 12, 13, 16, 17, 19, 23, 50 – 53 
B-SX5T: CN3, 4, 8, 9, 11 – 13, 15 – 17, 19, 20, 23, 50 – 53 
  
						

							10. MAJOR UNIT REPLACEMENT EO18-33012A 
10.2 MAIN PC BOARD 
 
10- 4 4) Remove the four SMW-3x6 screws to detach the Main PC board from the printer. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5) Replace the Main PC board with a new one, then reassemble in the reverse order of removal. 
 
 
 
 
 SMW-3x6 Screw 
Main PC Board    Main PC Board   
						

							10. MAJOR UNIT REPLACEMENT EO18-33012A 
10.3 PANEL PC BOARD AND LCD UNIT 
 
10- 5 10.3 PANEL PC BOARD AND LCD UNIT 
 10.3.1 LCD 
1) Remove the side panel (L). (Refer to Section 3.2.) 
2) Remove the operation panel ass’y. (Refer to Section 3.4.) 
3) Remove the two LCD harnesses, the four TT-2x6 screws, and the two TT-3x8 screws from 
the LCD. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4) Detach the LCD from the operation panel ass’y. 
 
 
 
 
 
 
 
 
5) Replace the LCD with a new one, then reassemble in the reverse order of removal. 
NOTE: When reassembling, lead the LCD harness through the space as the picture below 
shows.  Failure to do this may cause the cover to catch the harness.  Also secure the 
LCD together with the ground wire. 
 
 Operation Panel Ass’y 
TT-3x8 ScrewTT-2x6 Screw
TT-2x6 ScrewLCD Harness LCD   Operation Panel Ass’y  LCD Harness 
Space  LCD 
Ground Wire    
						

							10. MAJOR UNIT REPLACEMENT EO18-33012A 
10.3 PANEL PC BOARD AND LCD UNIT 
 
10- 6  10.3.2 Panel PC Board 
1) Remove the side panel (L). (Refer to Section 3.2.) 
2) Remove the operation panel ass’y. (Refer to Section 3.4.) 
3) Remove the two LCD harnesses and the six TT-3x8 screws from the LCD. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4) Detach the panel PC board from the operation panel ass’y. 
 
 
 
 
 
 
 
 
5) Disconnect the LCD harness from the panel PC board. 
 
 
 
 
 
 
 
 
 
 
 
6) Replace the panel PC board with a new one, then reassemble in the reverse order of removal. 
NOTE: When reassembling, lead the LCD harness through the space.  Failure to do this may 
cause the cover to catch the harness. (Refer to Section 10.3.1.) 
 
 LCD Harness 
TT-3x8 Screw  TT-3x8 Screw 
Panel PC Board  Operation Panel Ass’y  LCD Harness Panel PC Board   
						

							10. MAJOR UNIT REPLACEMENT EO18-33012A 
10.4 STEPPING MOTOR 
 
10- 7 10.4 STEPPING MOTOR 
1) Remove the side panel (L). (Refer to Section 3.2.) 
2) Disconnect the stepping motor harness from CN16 on the Main PC board. 
3) Remove the stepping motor harness from the cable clamp and the bush. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4) Remove the two SMW-4x8 screws from the stepping motor.  And then detach the stepping motor 
from the printer while taking the two timing belts off the pulley. 
 
 CN16 
Main PC Board Cable ClampBush 
Stepping Motor Harness Stepping Motor    SMW-4x8 Screw  SMW-4x8 Screw Pulley 
Timing Belt  Timing Belt
Stepping Motor