Toshiba B-SX6T Series User manual

PRINTED IN JAPAN
TOSHIBA Thermal Printer
B-SX6T/SX8T SERIES
Document No. EO18-33017
Original Mar., 2006
(Revised )
Maintenance Manual

EO18-33017
TABLE OF CONTENTS
Page
1. UNPACKING--------------------------------------------------------------------------------------------------------1- 1
1.1 Procedure ----------------------------------------------------------------------------------------------------1- 1
1.2 Checks--------------------------------------------------------------------------------------------------------1- 2
2. MAIN UNIT REPLACEMENT-----------------------------------------------------------------------------------2- 1
2.1 Replacing the MAIN PC Board -------------------------------------------------------------------------2- 2
2.2 Replacing the PS Unit-------------------------------------------------------------------------------------2- 3
2.3 Replacing the Stepping Motor --------------------------------------------------------------------------2- 5
2.4 Replacing the Ribbon Motors ---------------------------------------------------------------------------2- 7
2.5 Replacing the Print Head -------------------------------------------------------------------------------------2- 8
2.6 Replacing the Solenoid (Standard on the B-SX8T, Option for the B-SX6T) ----------------2- 9
2.7 Replacing the Platen ------------------------------------------------------------------------------------------2-11
2.8 Replacing the Roller Belt and Feed Roller----------------------------------------------------------2-12
2.9 Replacing the Media Sensor -------------------------------------------------------------------------------2-14
2.10 Periodic Maintenance Procedure--------------------------------------------------------------------------2-15
3. MECHANISM DESCRIPTION----------------------------------------------------------------------------------3- 1
3.1 Cutter Driver-------------------------------------------------------------------------------------------------------3- 1
3.1.1 Replacing the Cutter Arm and Clutch -----------------------------------------------------------------3- 2
4. TROUBLESHOOTING -------------------------------------------------------------------------------------------4- 1
CAUTION!
1. This manual may not be copied in whole or in part without prior written permission of TOSHIBA
TEC.
2. The contents of this manual may be changed without notification.
3. Please refer to your local Authorised Service representative with regard to any queries you
may have in this manual.
Copyright © 2006
by TOSHIBA TEC CORPORATION
A
ll Rights Reserved
570 Ohito, Izunokuni-shi, Shizuoka-ken, JAPAN

1. UNPACKING EO18-33017
1.1 Procedure
1- 1
1. UNPACKING
1.1 Procedure
1. Open the carton.
2. Take out the accessories from the carton.
3. Take out the side pads (L) and (R ) and the printer from the carton.
4. Place the printer on a level surface.
A
ccessory Pad
Holder Base
Start-up CD-ROM
Supply Loading Instruction
Safety Precaution
Quality Control Report
Warranty Disclaimer Sheet
Holder Shaft
Side Pad (L) Print Head Cleaner
Left/Right Side Holders
Printer
Side Pad (R)
Thumbscrew (M-4x6)
Carton
Media Holders

1. UNPACKING EO18-33017
1.2 Checks
1- 2
5. Remove the tapes from the printer.
1.2 Checks
1. Check for damage or scratches on the printer.
2. Confirm that none of the accessories are missing. The parts below are provided as accessories.
NOTE: Keep the carton and pads for later transport.

2. MAIN UNIT REPLACEMENT EO18-33017
2. MAIN UNIT REPLACEMENT
2- 1
2. MAIN UNIT REPLACEMENT
1. Turn the power off and disconnect the Power Cord.
2. Open the Right Side Cover and Top Cover.
3. Remove the six screws (FL-4x6, B-4x6, and B-3x8) to detach the Left Side Cover.
4. Remove the B-3x8 screw to remove the Bottom Plate.
NOTE: Instructions to open the Top Cover and Right Side Cover and to remove the Left Side Cover are omitted
from each removal/installation procedure provided below.
Lubrication
All machines are generally delivered in their best condition. Efforts should be made to keep them that way.
Lack of oil, or the presence of debris or dust, may cause an unexpected failure. To maintain in optimal
operating condition, periodically clean the machine and apply the proper kinds of oil to each part in which
lubrication is needed.
Although the frequency of lubrication varies according to how often the machine is used, as a minimum it is
necessary to lubricate before any part becomes dry. It is also necessary to wipe off excessive oil or it will
collect dirt.
WARNING!
Turn the power off and disconnect the power cord before replacing the main parts.
CAUTION!
1. DO NOT separate the ribbon motors from the attachment plate (bracket), as doing so will change
their adjustment. (See Section 2.4 REPLACING THE RIBBON MOTORS.)
2. DO NOT remove the two screws painted in red on the side of the print block.
3. DO NOT remove screws unless directed to do so in this manual. Removing screws may change
pre-set adjustments.
B-4x6 Screw
B-3x8 Screw
Left Side Cover
Bottom Plate
Top Cover
FL-4x6 Screw
Right Side Cover
B-3x8 Screw
CAUTION!
1. Lubrication: During parts replacement
2. Kinds of oil: FLOIL G-488: 1kg can (Part No. 19454906001)
3. Do not spray the inside of the printer with lubricants. Unsuitable oil can damage the mechanism.

2. MAIN UNIT REPLACEMENT EO18-33017
2.1 Replacing the MAIN PC Board
2- 2
2.1 Replacing the MAIN PC Board
1. Disconnect the all connectors from the MAIN PC Board.
2. Remove the three screws (FL-3x5 and SM-3x6) from the MAIN PC Board.
3. Remove the four screws (SMW-3x6 and SMW-3x6*) to separate the MAIN PC Board from the
Attachment Plate.
4. Replace the MAIN PC Board with a new one, and reassemble in the reverse order of removal.
CAUTION!
Replace only with the same type and rated fuse for continued protection against risk of fire.
SM-3x6 Screw
FL-3x5 Screw
SMW-3x6 Screw
A
ttachment Plate
MAIN PC Board
B-3x6* Screw
SMW-3x6 Screw

3.MAIN UNIT REPLACEMENT EO18-33017
2.2 Replacing the PS Unit
2- 3
2.2 Replacing the PS Unit
1. Disconnect the reactor cable from the Reactor and remove it from the cable clamp.
2. Remove the two FL-4x6 screws to detach the PS Unit. Pushing the AC power inlet from behind will ease
the removal of the PS Unit.
Reacto
r
Reactor Cable PS Unit
Cable Clamp
FL-4x6 screw
PS Unit

3.MAIN UNIT REPLACEMENT EO18-33017
2.2 Replacing the PS Unit
2- 4
2. Disconnect the PS Cable from CN1 connector of the PS Unit.
3. Replace the PS Unit with a new one, and reassemble in the reverse order of removal. When
reassembling, place the PS Cable into Notch (A) and Notch (B). Then, pass the Reactor cable through
Notch (C).
PS Uni
t
PS Cable
CN1 connector
PS Cable
Notch (C)
Reactor Cable
Notch (B)
PS Cable
PS Cable
Notch (A)

3.MAIN UNIT REPLACEMENT EO18-33017
2.3 Replacing the Stepping Motor
2- 5
2.3 Replacing the Stepping Motor
1. Remove the four FL-4x6 screws to detach the Front Plate.
2. Disconnect the cable from CN500 on the MAIN PC Board.
3. Remove the two SM-4x8 screws, take the two belts off the Pinion Gear, and remove the Stepping Motor.
4. Replace the Stepping Motor with a new one.
(1) At this time, place the Platen Belt around the Pinion Gear first, then the Feed Roller Belt, so that the
partition is positioned between the two belts.
Stepping Motor
FL-4x6 Scre
w
FL-4x6 Screw
FL-4x6 Screw
CN500
SMW-4x8 Screw
MAIN PC Board
Front Plate
Feed Roller Belt
Partition
Platen Belt
Pinion Gear

3.MAIN UNIT REPLACEMENT EO18-33017
2.3 Replacing the Stepping Motor
2- 6
(2) Temporarily attach the Stepping Motor, by tightening the two screws, in order of A and B.
(3) Using a tension gauge, press down the Stepping Motor with 34.3N
• cm ±2.94N • cm force.
While pressing down the Stepping Motor, tighten the screws A and B, in order.
Make sure that the Platen Belt and Feed Roller Belt have no slack, are engaged, and evenly tense.
5. Reassemble in the reverse order of removal.
First, tighten
Screw A.
Secondly, tighten
Screw B.
34.3N • cm ±2.94N • cm force

3.MAIN UNIT REPLACEMENT EO18-33017
2.4 Replacing the Ribbon Motors
2- 7
2.4 Replacing the Ribbon Motors
1. Disconnect the connectors and remove the two SMW-3x5 Screws to detach the Ribbon Motors.
2. Replace the Ribbon Motors with new ones. When installing the Ribbon Motors, align the dowel pins with
the dowel holes in the Ribbon Motor Attachment Plate.
3. Reassemble in the reverse order of removal.
FLOIL G-488
Dowel Pins
Connector (Black)
FLOIL G-488
Ribbon Motor
SMW-3x5 Screw
SWM-3x5 Scre
w
Connector (White)
A
ttachment Plate
CAUTION!
DO NOT separate the Ribbon Motor from the Attachment Plate, as doing so will change their
adjustment.
Ribbon Motor Attachment Plate

3.MAIN UNIT REPLACEMENT EO18-33017
2.5 Replacing the Print Head
2- 8
2.5 Replacing the Print Head
NOTE: The following procedure can be done without removing the Left Side Cover.
1. Remove the two B-4x6 screws to detach the Head Cover Plate.
2. Pull the Front Shaft to the right side to remove it.
3. Turn the Head Lever counterclockwise to raise the Print Head.
4. Remove the Head Fixing Screw and pull out the Print Head.
5. Disconnect the two cables and remove the Print Head.
NOTE: DO NOT separate the Print Head from the bracket.
6. Replace the Print Head with a new one, and reassemble in the reverse order of removal.
7. Refer to the System Mode Manual to clear the Maintenance Counter and perform a test print.
CAUTION!
1. DO NOT touch the thermal element when handling the Print Head.
2. DO NOT touch the connector pins to avoid damage to the Print Head by static electricity.
3. DO NOT remove the two screws painted in red on the side of the Print Block.
Head Lever
Head Fixing Scre
w
B-4x6 Screw
Head Cover Plate
Print Head
Front Shaft

3.MAIN UNIT REPLACEMENT EO18-33017
2.6 Replacing the Solenoid (Standard on the B-SX8T, Option for the B-SX6T)
2- 9
2.6 Replacing the Solenoid
(Standard on the B-SX8T, Option for the B-SX6T)
NOTE: The following procedure can be done without removing the Left Side Cover.
1. Remove the two SMW-4x8 screws, detach the connectors, and remove the Solenoid Unit (R).
2. Remove the two SMW-4x8 screws, disconnect the cables from CN1, CN2, and CN3 on the RSV2 PC
Board and detach the Solenoid Unit (L).
3. Remove the two SMW-4x8 screws from each of the Solenoid Units (L) and (R) to detach the Solenoid.
4. Replace the Solenoid and attach it to the Solenoid Attachment Plate. Be careful of the differences in
length of the Solenoid Cables when installing the Solenoid.
5. Assemble the Solenoid Unit so that the Head Up Link engages the spring pin.
NOTE: Be sure to remove any dust that appears during removal or installation because it may affect the print
quality.
CN3
SMW-4x8 Screw
Connector
Solenoid Unit (L)
Solenoid Unit (R)
CN2 (Solenoid R)
RSV2 PC Board
CN1
(Solenoid L)
Spring Pin
Solenoid
Head Up Link
Solenoid

3.MAIN UNIT REPLACEMENT EO18-33017
2.6 Replacing the Solenoid (Standard on the B-SX8T, Option for the B-SX6T)
2- 10
6. Remove the Head Cover Plate. (Refer to Section 2.5.)
7. Insert piled 10 pieces of tag paper of 8 inches or 6 inches (203.2 mm or 170.6 mm) in width, 0.16 mm in
thickness (I-BEST-S is recommended.) between the Print Head and the Platen. Then, turn the Head
Lever to the LOCK position.
8. Push and hold the Head Up Link against the Solenoid (c), and then press and fit the Solenoid Unit
snugly to the Head Up Link (d). Secure the Solenoid Unit with the screws.
9. Reassemble in the reverse order of removal.
CAUTION!
Orient the screws so that they are vertically aligned with the Solenoid Attachment Plate.
Push
Platen
Print Head
Push
Thickness: 1.6 mm
Head Up Link Solenoid Unit

3.MAIN UNIT REPLACEMENT EO18-33017
2.7 Replacing the Platen
2- 11
2.7 Replacing the Platen
1. Remove the Front Plate. (See Section 2.3.)
2. Loosen the two SMW-4x10 screws securing the Stepping Motor.
3. Remove the FL-4x6 screw to detach the Platen Positioning Plate.
4. Take the Platen Belt off the Platen Pulley, move the Platen fully to the right, and remove it from the left
end.
5. Replace the platen with a new one, and then install the Platen and place the Platen Belt around the
Platen Pulley.
6. Install the Platen Positioning Plate.
7. Press down on the Stepping Motor with 34.3N • cm ±2.94N • cm force and secure it so the Platen Belt and
the Feed Roller Belt have no slack, are engaged and evenly tense. (For details, refer to Section 2.3.)
8. Reattach the remaining parts in the reverse order of removal.
Platen
Platen Positioning Plate
Platen Belt
Platen Pulley
FL-4x6 Screw

3.MAIN UNIT REPLACEMENT EO18-33017
2.8 Replacing the Roller Belt and Feed Roller
2-12
2.8 Replacing the Roller Belt and Feed Roller
1. Lower the Pinch Roller Lever.
2. Remove the Plastic Head Screw to detach the Ribbon End Sensor Plate.
3. Remove the FL-3x5 screw, cut the Cable Band, and remove the Head-up Switch.
4. Detach the connector of the Ribbon End Sensor.
5. Remove the Pinch Roller Block.
NOTE: Fit both sides of the studs into the notches when installing the Ribbon End Sensor Plate.
6. Remove the four E-5 retaining rings, Pinch Roller Holder, Bush, Pinch Roller Washer, and then Roller
Belt.
FL-3x5 Screw
Ribbon End Sensor Plate
Head Up Switch
Plastic Head Screw
Notch
Pinch Roller Lever
Pinch Roller Block
Cable Band
Roller Belt
Pinch Roller Washer
E-5
Bush
Pinch Roller Holde
r
Connector
E-5
Stud

3.MAIN UNIT REPLACEMENT EO18-33017
2.8 Replacing the Roller Belt and Feed Roller
2-13
7. Remove the two FL-4x6 screws and detach the Media Plate.
8. Remove the two FL-4x6 screws and detach the Media Guide Unit.
9. Loosen the two SMW-4x10 screws securing the Stepping Motor.
10. Remove the two screws to detach the Feed Roller Positioning Plate.
11. Take the feed Roller Belt off the Feed Roller, move the Feed Roller fully to the left and remove the
Feed Roller from the right end.
NOTE: Fit both sides of the studs into the notches when installing the Media Guide Unit.
12. After replacing the Feed Roller with a new one, install it and place the Feed Roller Belt around the Feed
Roller Pulley.
13. Install the Feed Roller Positioning Plate.
14. Press down on the Stepping Motor with 34.3N
• cm ±2.94N • cm force and secure it so the Platen Belt
and the Feed Roller Belt have no slack, are engaged and evenly tense. (For details, refer to Section
2.3.)
15. Reattach the remaining parts in the reverse order of removal.
Stud
FL-4x6 Screw
Notch
Media Plate
FL-4x6 Scre
w
Feed Roller
Positioning Plate Media Guide Unit
Feed Roller Belt
Feed Roller
Feed Roller Pulley

3.MAIN UNIT REPLACEMENT EO18-33017
2.9 Replacing the Media Sensor
2-14
2.9 Replacing the Media Sensor
1. Disconnect the four connectors from the fixed and movable media sensors.
2. Remove the two FL-4x6 screws and the Sensor Holder to detach the Media Sensor Unit.
3. Turn the knob of the Sensor Shaft clockwise and remove the Movable Media Sensor.
4. Remove the E-3 retaining ring from the Sensor Shaft and detach the Lower Fixed Media Sensor.
5. Remove the Plastic Head Screw to detach the Media Guide Plate.
6. Remove the two SMW-3x6 screws, then release the Upper Fixed Media Sensor from the Clamp, and
remove it.
7. Replace the Fixed and Movable Media Sensors, and reassemble in the reverse order of removal.
CAUTION!
1. When using the Fixed Sensor, line up the Feed Gap Sensors between the Upper and Lower
sensors.
2. When shipped from the factory, the Black Mark Sensor is positioned at the center of the effective
print area and the Feed Gap Sensor is located 10 mm left of the center, as viewed from the front.
Fixed Media Sensor
Media Guide Plate
Movable Media Sensor
FL-4x6 Screw
Connecto
r
Knob
E-3
Media Sensor Unit
Clamp
Media Guide Plate
Plastic Head Screw
Connector
SMW-3x6 Screw
Upper Fixed Media Sensor
NOTE:
A
fter replacing the Media Sensor, a sensor adjustment is required. Refer to the System Mode Manual,
Section 2.5 Sensor Adjustment.

3.MAIN UNIT REPLACEMENT EO18-33017
2.10 Periodic Maintenance Procedure
2-15
2.10 Periodic Maintenance Procedure
All machines are generally delivered in their best condition. To maintain optimal operating condition and
help gain maximum performance and life of machines, we would recommend you to conduct periodic
maintenance. Doing this is also effective in preventing unexpected troubles and avoiding wasteful system
down, by which more benefit is produced to your customers and greater reliance is placed on the product
quality.
Please refer to the following general maintenance procedure and perform periodic servicing.
NOTE: Before starting the periodic maintenance, be sure to read carefully and understand the Service Manuals,
especially warnings, cautions, and adjustment.
1. Ask an operator or a manager about any machine trouble.
2. Check the run distance on the Maintenance Counter
3. Unplug the Power Cord, and then open the Printer Cover.
4. Clean the inside of the printer.
1) The entire inside of the printer should be cleaned.
2) Wipe the Platen and the Feed Roller with a cloth moistened with alcohol.
3) Clean the Print Head Elements with a Print Head Cleaner.
(Please instruct your customers to clean them daily.)
4) Clean the Sensors.
5) Remove paper debris or label glue from the media path.
5. Apply FLOIL G-488 to the specified parts.
1) Apply grease to the Cutter Unit using a soft cloth.
6. Confirm that the problem occurs as reported, and then take corrective action.
7. Replace the following parts periodically, if necessary. The following table shows approximate product life
for each part.
No. Part Name Part No. Standard interval of replacement
1 Ribbon Motor 7FM01600000 730 km
2 Ribbon Saving Module ----------- 1,000,000 times
3 Platen 7FM01589000 50 km
FLOIL G-488
Clutch
Arm
FLOIL G-488

3.MAIN UNIT REPLACEMENT EO18-33017
2.10 Periodic Maintenance Procedure
2-16
8. Confirm each part adjustment. Make any necessary adjustments.
9. Conduct the following tests and make sure that there is no problem.
1) Print test with TOSHIBA TEC specified media and ribbon (Print tone, print head position, etc.)
2) Paper skew
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.
10. Mount the Top Cover.
11. Clean the outside of the printer.
12. Fill out a report form. Hand it to the manager and obtain a signature.