TEC B-470 SERIES User manual

PRINTED IN JAPAN
TEC Thermal Printer
B-470 SERIES
Original Feb., 1994
(Revised )
Document No. EM18-33011
Maintenance Manual

NOTES: 1. Manual instructions must be followed when installing option kits or adding cables
to avoid system failures and to insure proper performance and operation.
2. Failure to follow manual instructions or any unauthorized modification,
substitution or change to this product will void the limited product warranty.
WARNING!
Follow all manual instructions. Failure to do so could create safety hazards such as fire or
electrocution.

TABLE OF CONTENTS
1. UNPACKING ...........................................................................................1- 1
1.1 Procedures ......................................................................................1- 1
1.2 Checks.............................................................................................1- 1
2. MAJOR UNIT REPLACEMENT ..............................................................2- 1
2.1 Replacing the PS Unit, I/F PC Board and CPU PC Board ..............2- 2
2.2 Replaceing the Stepping Motor .......................................................2- 4
2.3 Replacing the Ribbon Motors ..........................................................2- 5
2.4 Replacing the Take-up Motor ..........................................................2- 5
2.5 Replacing the Solenoid....................................................................2- 7
2.6 Replacing the Print Head.................................................................2- 8
2.7 Replacing the Platen and Feed Roller............................................2- 11
2.8 Replacing the Paper Sensor...........................................................2- 13
2.9 Replacing the Ribbon Back Tension Block.....................................2- 13
2.10 Replacing the Pinch Roller Shaft Ass'y ..........................................2- 14
2.11 Correcting Skew Priting ..................................................................2- 16
3. INSTALLATION PROCEDURE FOR
THE OPTIONAL EQUIPMENTS ..........................................3- 1
3.1 High Speed PC Interface Board (B-4800-PC-QM) ..........................3- 1
3.2 Cutter Module (B-4205-QM) ............................................................3- 3
3.3 Memory Module...............................................................................3- 5
3.4 Ribbon Saving Module (B-4905-R-QM)...........................................3- 6
3.5 Strip Module (B-4905-H-QM)...........................................................3- 8
3.6 I/F PC Board (B-4700-IO-QM)........................................................3- 11
3.7 Fanfold Paper Guide Module (B-4905-FF-QM) ..............................3- 12
4. MECHANISM DESCRIPTIONS ...............................................................4- 1
4.1 Cutter Drive (Cut mode) ..................................................................4- 1
4.2 Harness Wiring ................................................................................4- 2
5. TROUBLESHOOTING.............................................................................5- 1
6. DIAG. TEST OPERATION.......................................................................6- 1
7. PROGRAM DOWN LOAD.......................................................................7- 1
7.1 DOS VERSION................................................................................7- 1
7.2 WINDOWS VERSION .....................................................................7- 4
EM18-33011
(Revision Date: Feb. 10, 2000)
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 Authorized Service representative with regard to any queries you may
have in this manual.
Page
Copyright © 2000
by TOSHIBA TEC CORPORATION
All Rights Reserved
570 Ohito, Ohito-cho, Tagata-gun, Shizuoka-ken, JAPAN

1-1
1. UNPACKING EM18-33011
(Revision Date: Sep. 14 '95)
1.1 Procedure
1. UNPACKING
1.1 Procedure
1) Open the carton.
2) Unpack the accessories from the carton.
3) Unpack the side pad (L)/(R) and the printer from the carton.
4) Place the printer on the level surface.
Owner's Manual
1.2 Checks
1) Check for damages or scratches on the machine.
2) Confirm that none of the accessories are missing.
NOTE: Keep the carton and side pads for later transport.
Side Pad (L)
Power Cord
Supply Holder
Carton
Side Pad (R)
Rear Pad
Thermal Printer
Unpacking Procedure
Fig. 1-1

2-1
2. MAJOR UNIT REPLACEMENT EM18-33011
(Revision Date: Dec. 09 '94)
2. MAJOR UNIT REPLACEMENT
2. MAJOR UNIT REPLACEMENT
CAUTION:
1.NEVERseparatetheribbonmotorsfromtheattachingplate,(bracket)because doing so will
change their adjustment. (See Fig. 2-8)
2.NEVER remove the two screws painted red on the side of the print block. (See Fig. 2-13)
3.NEVER remove the four screws on the side of the print block. (See Fig. 2-13)
4. NEVER remove the four screws painted red fixing the right plate and reinforcing plate. (See
Fig. 2-16) However, the machine with a serial number of 4Txxxxxx or later is not equipped
with the red screws because of the change in the right plate shape.
5.NEVER remove unmentioned screws because doing so will change their adjustment.
1) Turn the power off.
2) Open the top cover to remove the four FL-3x5 screws. Slide the top cover to the left to release the
damper and remove the top cover.
3) Remove the seven screws (FL-4x5 and B-4x5) to remove the left side cover.
4) Disconnect the FAN motor connector from the PS unit.
WARNING!
Disconnect the power cord before replacing the main parts.
Fig. 2-1
NOTE: Instructions to remove the top cover and left side cover are omitted from each removal/
installation procedure provided below.
■Lubrication
CAUTION: 1.Lubrication: During parts replacement
2.Kinds of oil: FLOIL G-488: 1kg kan (Part No. 19454906001)
Any machine is generally in its best condition when delivered; therefore, it is necessary to try to keep
this condition. Unexpected failure occurs due to lack of oil, debris or dust. To keep its best condition,
periodically clean the machine and apply proper kinds of oil to each part in which lubrication is needed.
Although the frequency of lubrication varies according to how much the machine is used, at least it is
necessary to lubricate before the machine becomes dry. It is also necessary to wipe off excessive oil
as it collects dirt.
CAUTION: Donotspraytheinsideoftheprinterwithlubricantsunsuitableoilcandamagethe
mechanism.
Top Cover
Screw (FL-3x5)
Screw (FL-4x5)
Left Side Cover
FAN Motor
Screw (B-4x5) Damper

2-2
2. MAJOR UNIT REPLACEMENT EM18-33011
(Revision Date: Oct. 14 '94)
2.1 Replacing the PS Unit, I/F PC Board and CPU PC Board
2.1 Replacing the PS Unit, I/F PC Board and CPU PC Board
CAUTION: Replace only with same type and ratings of fuse for continued protection against
risk of fire.
1) Remove the three FL-4x6 screws and disconnect the two connectors to detach the PS unit.
2) Remove the FL-3x5 screw and the four locking supports to remove the I/F PC board.
3) Disconnect the 9 connectors from the CPU PC board.
4) Remove the six screws (SM-3x6B, SM-3x6C) to detach the CPU PC board from the printer.
5) Replace the PS unit, I/F PC board and CPU PC board. Insert the connectors correctly and install in
the reverse order of removal above. Do not mount the left side cover and top cover.
6) Make sure to adjust the various voltages after replacing the CPU PC board.
Fig. 2-2
Fig. 2-3
Locking Support
Connector
Screw (FL-4x6)
PS Unit
Screw (FL-4x6)
Screw (FL-3x5)
I/F PC Board
Screw (SM-3x6B)
CPU PC Board
Screw (SM-3x6B)
Connector
Connector
Connector
Screw (SM-3x6B)
Screw (SM-3x6C)
Connector
Screw (SM-3x6B)
Connector

2-3
2. MAJOR UNIT REPLACEMENT EM18-33011
7) Adjust the ribbon end sensor.
Use the following Ribbons; TTM-78 (Maker:
Fujicopian)
(1) Set the ribbon so that the ribbon end sensor
can detect the ribbon. Turn the power on.
(2) TurntheVR1so thatthe voltagebetween Pin
1 (GND) and Pin 7of CN12 is 3.0 –0.2V with
an oscilloscope.
(3) Turn the power off and mount the left side
cover and top cover.
(Revision Date: Feb. 10, 2000)
2.1 Replacing the PS Unit, I/F PC Board and CPU PC Board
8) Adjust the black mark sensor.
As the black mark sensor is adjusted by key entries in system mode, refer to page 6-38 for the
adjustment procedure.
9) Adjust the feed gap sensor.
Asthefeedgapsensorisadjustedbykeyentriesinsystemmode,refertopage6-39fortheadjustment
procedure.
CAUTION: Be careful when replacing the CPU PC board, since a non-resettable counter
(IC13) is installed on this board. (Refer to Section 6.2.1 Maintenance Counter
Printing.)
If this counter should be reset, replace IC13.
Fig. 2-4
Fig. 2-5
VR1
GND
Voltage
3.0 –0.2 V
Range: 1 V / 0.2 m sec.

2-4
2. MAJOR UNIT REPLACEMENT EM18-33011
(Revision Date: Apr. 05 '94)
2.1 Replacing the Stepping Motor
2.2 Replacing the Stepping Motor
1) Remove the two black screws to detach the front plate, remove the two FL-4x6 screws to detach the
belt cover.
Fig. 2-6
2) Unclamp and disconnect the connector from CN13 on the CPU PC board.
3) Remove the two SM-4x10C screws, loosen the two belts from the pinion gear, and remove the
stepping motor.
4) Whenreplacingthesteppingmotor,placetheplatenbeltfirstthenthefeedrollerbeltaroundthepinion
gear so that the partition is positioned between two belts. Hold down the stepping motor at 3.5 kg ±
300 g force and secure it so that the belts have no slack or disengagement.
5) Reassemble in the reverse order of removal.
Fig. 2-7
Belt Cover
Screw (FL-4x6)
Black Screw
Front Plate
Screw (SM-4x10C)
Feed Roller Belt
Partition
Platen Belt
Clamp
CPU PC Board
CN13
Pinion Gear
Stepping Motor
PS Unit

2-5
2. MAJOR UNIT REPLACEMENT EM18-33011
(Revision Date: Apr. 05 '94)
2.3 Replacing the Ribbon Motors
2.3 Replacing the Ribbon Motors
CAUTION: NEVERseparatetheribbonmotorsfromtheattachingplatebecausedoingsowill
change their adjustment.
1) Disconnect the connector and remove the two SM-3x5B screws to detach the ribbon motors.
Fig. 2-8
2) Replace the ribbon motors, then align the dowels to attach the ribbon motors. Reassemble in the
reverse order of removal.
2.4 Replacing the Take-up Motor
CAUTION: NEVERseparatethetake-upmotorfromthebracketbecausedoingsowillchange
the adjustment.
NOTE: The following procedure can be employed without removing the top cover and left side cover.
1) Remove the four FL-3x5 screws to detach the motor cover.
2) Remove the connector for the rewind full sensor (LED).
3) Disconnect the connector from the CN1 on the PWM PC board and remove the two FL-3x5 screws
to detach the take-up motor.
Fig. 2-9
4) Replace the take-up motor, then align the dowels to attach the motor cover and rewind full sensor
(Tr).
Dowels
Attaching Plate
FLOIL G-488
FLOIL G-488
Attaching Plate
Ribbon Motor
Screw (SM-3x5B)
Connector (Red)
Connector (Black)
Screw (SM-3x5B)
Connector (CN1)
Screw (FL-3x5)
Screw (FL-3x5)
PWM PC Board
Bracket
Take-up Motor
Connector
Ribbon Motor
Motor Cover

2-6
2. MAJOR UNIT REPLACEMENT EM18-33011
(Revision Date: Apr. 05 '94)
2.5 Replacing the Solenoid
2.5 Replacing the Solenoid
NOTE: The following procedure can be employed without removing the top cover and left side cover.
1) Before removing the ribbon stopper, check its attaching direction for later installation. Remove the
ribbon stopper from the ribbon shaft on which the ribbon is wound.
2) RemovethetwoSM-4x8Bscrews,disconnecttheconnectorCN1ontheRSVPCboardtodetachthe
solenoid unit.
Fig. 2-10
3) RemovethetwoSM-3x5BscrewsanddisconnecttheconnectorCN2ontheRSVPCboardtodetach
the solenoid.
Fig. 2-11
Connector CN1 (3 pin) Solenoid Attaching Plate Screw (SM-4x8B)
Ribbon Stopper
Ribbon Shaft
CN2 (2 pin)
RSV PC Board
Print Block
Connector CN2 (2 pin)
RSV PC Board
Solenoid
Solenoid Attaching Plate
Screw (SM-3x5B)

2-7
2. MAJOR UNIT REPLACEMENT EM18-33011
NOTE: Makesuretoremoveanydustthatappearsduringremovalorinstallationbecauseitmayaffect
the print quality.
4) Replace the solenoid and attach it to the solenoid attaching plate.
5) Assemble the solenoid unit so that the head up link engages the spring pin.
2.5 Replacing the Solenoid
CAUTION: Take care to orient the screw so that they are vertically aligned with the solenoid
attaching plate.
6) Reasemble in the reverse order of removal.
Fig. 2-12
Solenoid
Spring Pin
Head Up Link

2-8
2. MAJOR UNIT REPLACEMENT EM18-33011
2.6 Replacing the Print Head
CAUTION:
1.NEVER touch the element when handling the print head.
2.NEVERtouch the connector pins toavoid a breakdown of theprint head by static electricity.
3.NEVER remove the two screws painted red on the side of the print block.
4.NEVER remove the four screws on the side of the printer block.
5.NEVER remove the print block, otherwise it requires the adjustment of the position when
reassembling.
NOTE: The following procedure can be employed without removing the top cover and the left side
cover.
2.6.1 Old type print head
1) Turn the head lever clockwise to lower the print head. Remove the two SM-4x8B screws.
2) Turn the head lever counter clockwise and disconnect the two connectors to detach the print
head from the print block.
(Revision Date: Feb. 01 '96)
2.6 Replacing the Print Head
3) Replace the print head, connect the connectors and install it in the print block.
4) Turn the head lever clockwise. Push the print head and secure it temporarily.
Follow the procedure on the next page.
Fig. 2-13
Print Block
Head Lever
Connector
Print Head
Screw (SM-4x8B)
Connector
Screws painted red
(NEVER remove these screws.)
Screws
(NEVER remove these screws.)

2-9
2. MAJOR UNIT REPLACEMENT EM18-33011
■Adjusting the print head position
1Fit the jig in the platen and strip shaft.
2Pressthejigatanangleof45 untilitissungagainsttheprinthead. Thensecuretheprinthead.
(Revision Date: Feb. 01 '96)
2.6 Replacing the Print Head
3Remove the jig.
4Refer to page 6-42 and clear the maintenance counter.
5Refer to page 6-30 and perform test print.
NOTE: Use caution to prevent damage to the element during adjustment of the print head.
Fig. 2-14
Jig Strip Shaft
Platen
Jig
Strip Shaft Platen
Ceramic
Print Head

2-10
2. MAJOR UNIT REPLACEMENT EM18-33011
2.6.2 New type print head
NOTE: Never loosen screws other than two SM-4x8B.
1) Turn the head lever clockwise to lower the print head. Remove the two SM-4x8B screws.
2) Turn the head lever counterclockwise and disconnect the two connectors to detach the print
head from the print block.
(Revision Date: Feb. 01 '96)
2.6 Replacing the Print Head
3) Replace the print head and connect the connectors.
4) Align the two holes A in the middle of the print head with the print head position adjusting pins
provided in the print block and fit the print head into the print block.
5) Turn the head lever clockwise and secure the print head with screws in the holes B .
NOTE: Use caution to prevent damage to the element during print head adjustment.
■Adjusting the print head position
When print tone becomes light from using special paper with improper print head position,
please follow the procedure below and adjust the print head position.
NOTE: Neverloosenscrews C unlessprintpositionfineadjustmentisrequiredbecause
they have been adjusted properly. Doing so will change the adjustment.
Fig. 2-15
Screw (SM-4x8B)
Print Block
Head Lever
Connector
Print Head
Connector
Screws painted red
(NEVER remove these screws.)
Screws
(NEVER remove these screws.)

2-11
2. MAJOR UNIT REPLACEMENT EM18-33011
(1) Loosen the screws c securing the print head position adjusting pin.
(2) Loosen the screws b one by one, slightly move the print head backward or forward, and
then tighten the screws b and c . Ensure that the print head is parallel to the platen. If
not, print tone will be uneven.
(3) Make a test print and if necessary, repeat Step 2) until the printer prints properly.
2.7 Replacing the Platen and Feed Roller
CAUTION:
1. NEVER remove the four screws painted red fixing the right plate and reinforcing plate. (See
Fig. 2-16)
2.The pinch roller belt assembled inside the printer does not need to be replaced because it
receives less load.
1) Remove the front plate and belt cover. (See Fig. 2-6.)
2) Turn the head lever counterclockwise, then release the ribbon shaft holder plate.
(Revision Date: Feb. 01 '96)
2.6 Replacing the Print Head
Fig. 2-16
Print Head Bracket
Print Head
(securing the print head)
(securing the adjusting pin)
(Print Head Position
Adjusting Pin)
Fig. 2-17
E-ring (M3)
Hold Shaft
Ribbon Shaft Holder Plate
Head Lever

2-12
2. MAJOR UNIT REPLACEMENT EM18-33011
3) Disconnect the connector for the strip sensor (LED).
4) Remove the six screws (FL-4x6, B-4x12 and P-3x12) to detach the right plate Ass’y.
(Revision Date: Sep. 29 '95)
2.7 Replacing the Platen and Feed Roller
NOTE: The machine with a serial number of 4Txxxxxx or later is not equipped with the red screws
because of the change in the right plate shape.
5) Loosen the two screws (SM-4x8B) fixing the stepping motor to loosen the platen belt and feed roller
belt.
6) Remove the platen belt to detach the platen. Remove the feed roller belt to detach the feed roller.
7) Remove both bearings from the platen or feed roller.
8) Replace the platen and feed roller, put on the belt and assemble it with the printer. The longer belt
is the platen belt.
9) Attach the right plate.
10) Hold down the stepping motor and secure it so that the belts have no slack or disengagement.
11) Reassemble in the reverse order of removal.
Fig. 2-18
Fig. 2-19
Screws painted red
(NEVER remove these screws.)
Right Plate
Screw (B-4x12)
Screw (FL-4x6)
Screw (B-4x12)
Screw (P-3x12)
Strip Sensor (LED)
Connector
Feed Roller Belt
Holder
Feed Roller (Gray)
Holder
Platen (Black)
Holder
Platen Belt

2-13
2. MAJOR UNIT REPLACEMENT EM18-33011
2.8 Replacing the Paper Sensor
2.8 Replacing the Paper Sensor
NOTE: Turn the knob until the paper sensor reaches full forward.
1) Disconnect the connector for the strip sensor (LED) to remove right plate ass’y. (See Figs. 2-17 and
2-18.)
2) Disconnect the connectors for the paper sensor.
3) Remove M1.5 E-ring, M3 washer and paper sensor unit.
4) Remove M1.5 E-ring, turn the knob counter clockwise, then remove the paper sensor.
Fig. 2-20
5) Replace the paper sensor and reassemble in the reverse order of removal.
6) After replacing the paper sensor, refer to page 6-32/6-33 and adjust the voltage.
2.9 Replacing the Ribbon Back Tension Block
1) Turn the head lever counterclockwise, then release the ribbon shaft holder plate.
2) RemovetheM3E-ringandthetwoM3washerstoremovetheribbonbacktensionblock. Atthistime,
removethebacktensionstopperandribbonbacktensionwasherfromtheribbonbacktensionblock.
Fig. 2-21
Connector (2 pin)
Washer (M3)
(24A62101030)
E-ring (M1.5)
(24A64250F50) E-ring (M1.5)
(24A64250F50)
Paper Sensor
Sensor Shaft
Knob
Ribbon Back Tension Washer
Back Tension Stopper
Ribbon Back Tension Block
Washer (M3)
(24A62101030)
E-ring (M3)
(24A64050030)
Connector (4 pin)
3) Replace the ribbon back tension block and reassemble in the reverse order of removal.

2-14
2. MAJOR UNIT REPLACEMENT EM18-33011
(Revision Date: Sep. 29, '95)
2.10 Replacing the Pinch Roller Shaft Ass'y
2.10Replacing the Pinch Roller Shaft Ass’y
1) Turn the head lever to position 3, and release the ribbon shaft holder plate.
2) Remove the black screw to detach the media guide plate.
Fig. 2-22
3) Remove the SM-4x8B screw to detach the spring plate.
4) Remove the six B-4x12 screws to detach the pinch roller cover.
5) Remove the E-5 E-ring to loosen the pinch roller belt, and remove the pinch roller shaft ass’y.
6) After replacing the pinch roller shaft ass’y, make the following adjustment while you reassemble the
pinch roller shaft ass’y in the reverse order of removal.
Fig. 2-23
Media Sensor
Printer Block Base
Media Guide Plate
Black Screw
(HAA-0004001)
SM-4x8B
Spring Plate
B-4x12
Pinch Roller Cover
W-8
Pinch Roller Shaft Ass'y
Pinch Roller Cover
Pinch Roller Belt
E-5
1.5 ~ 2.5 mm

2-15
2. MAJOR UNIT REPLACEMENT EM18-33011
■Adjustment
1. Install the pinch roller unit so it parallels the base. If it does not, change the engaging position of the
pinch roller belt and the pulley.
2. Attach the jig to the platen, feed roller and pinch roller shaft as shown in the figure below.
Then attach the pinch roller cover to the pinch roller frame with the three B-4x12 screws.
Then secure the pinch roller frame with the three B-4x12 screws.
NOTES: 1. Replace the platen and the feed roller prior to attaching the jig.
2. Attach the jig while the pinch roller frame is tentatively attached to the main frame with the
B-4x12screws. SecurethepinchrollercovertothepinchrollerframewiththethreeB-4x12
screws, then tighten the other side of the screws.
3. The flat top of the pinch roller frame must be installed in parallel to bosses on the printer
frame.
Check
1 Check if excessive load is applied to the jig after the above NOTE 2.
(For example, check if the pinch roller frame moves when the jig is removed.)
2 Checkthatthereisnogapcausedbyaslantshaftbetweenthepinchroller andthefeed
roller when the pinch roller is lowered.
(Revision Date: Sep. 29, '95)
2.10 Replacing the Pinch Roller Shaft Ass'y
Fig. 2-24
Fig. 2-25
Pinch Roller Belt
Pinch Roller Unit
Pulley
Pinch Roller Cover
B-4x12 (6 screws)
Jig

2-16
2. MAJOR UNIT REPLACEMENT EM18-33011
3. Turn the head lever clockwise to lock the pinch roller shaft ass’y. Attach the spring plate to the pinch
roller frame with the two SM-4x8B screws, pushing the spring plate toward the rear of the printer.
(Revision Date: Sep. 29, '95)
2.10 Replacing the Pinch Roller Shaft Ass'y
NOTE: Check that the pinch roller shaft ass’y moves up and down smoothly when turning the head
lever clockwise/counterclockwise.
4. Install the media guide plate to the printer so there is a 1.5 to 2.5 mm gap between the media guide
plate and the printer block base.
2.11Correcting Skew Printing
• If media still skews after adjusting the pinch roller shaft ass’y with the jig, follow the procedure below
to correct the skew problem.
1. Check if the media skews right or left.
2. Loosen the B-4x12 screw to move the pinch roller cover to the front or rear of the printer depending
on the skew direction.
When the media skews right, move the pinch roller cover to the front.
When the media skews left, move the pinch roller cover to the rear.
• Ifapaperskewproblemshouldoccurwhenusingrollswoundwithlabelsfacingoutsideaftercompleting
the modification, adjust the paper guide as follows.
* In case the label skews to the right side of the print head, move the guide downward.
* In case the label skews to the left side of the print head, move the guide upward.
Fig. 2-26
Pinch Roller Shaft Ass'y
Pinch Roller Frame
SM-4x8B
Spring Plate
Guide Plate
Fig. 2-27
Fig. 2-28