Toshiba B-EP4DL Series User manual

PRINTED IN JAPAN
TOSHIBA Potable Printer
B-EP4DL SERIES
Document No. EO18-33023
Original Sep., 2008
(Revised )
Maintenance Manual

WARNING!
Follow all manual instructions. Failure to do so could create safety hazards such as fire or
electrocution.
NOTE:
Failure to follow manual instructions or any unauthorized modification, substitution orchange to
this product will void the limited product warranty.

EO18-33023
(Revision Date: Dec. 16, 2008)
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.
Copyright © 2008
by TOSHIBA TEC CORPORATION
A
ll Rights Reserved
570 Ohito, Izunokuni-shi, Shizuoka-ken, JAPAN
TABLE OF CONTENTS
Page
1. UNPACKING .............................................................................................................. 1- 1
1.1 Procedure ........................................................................................................................1- 1
1.2 Checks.............................................................................................................................1- 1
2. MAJOR UNIT REPLACEMENT.................................................................................. 2- 1
2.1 Replacing the CPU PC Board .........................................................................................2- 1
2.2 Replacing the LCD Unit ...................................................................................................2- 8
2.3 Replacing the Peel-off Roller...........................................................................................2- 9
2.4 Replacing the Peel-off Sensor.......................................................................................2- 10
2.5 Replacing the Drive PC Board.......................................................................................2- 12
2.6 Replacing the Battery Terminal .....................................................................................2- 13
2.7 Replacing the Stepping Motor .......................................................................................2- 14
2.8 Replacing the Print Head...............................................................................................2- 15
2.9 Replacing the Cover Open Switch and Media Sensor (Lower) .....................................2- 17
2.10 Replacing the Media Sensor (Upper) ............................................................................2- 19
2.11 Replacing the Platen Ass’y............................................................................................2- 21
3. TROUBLESHOOTING................................................................................................ 3- 1

1. UNPACKING EO18-33023
1.1 Procedure
1- 1
1. UNPACKING
1.1 Procedure
1) Open the carton.
2) Unpack the accessories from the carton.
3) Unpack the printer.
NOTE: Keep the carton and pad for future transportation of the printer.
1.2 Checks
1) Check for damage or scratches on the machine.
2) Confirm that none of the accessories are missing.

2. MAJOR UNIT REPLACEMENT EO18-33023
2.1 Replacing the CPU PC Board
2-1
2. MAJOR UNIT REPLACEMENT
WARNING!
1. Disconnect the power cord before installing the main parts.
2. Be careful not to injure your fingers when replacing the main parts.
CAUTION!
1. Since a lot of small moulded parts are used in this printer, care must be taken not to damage or lose
them.
2. Be careful not to damage the print head while removing and reassembling.
3. In the United States, used lithium ion batteries should be returned to the store where you bought the
machine. (USA only)
4. LITHIUM ION BATTERYDISPOSE OF PROPERLY
Caution: Do not handle damaged or leaking lithium ion battery.
5. Before handling the main parts, be sure to discharge static electricity in human body through other
metals. Failure to do this may damage the CPU PC board, print head, etc..
NOTES:
1. Before replacing the main parts, print out the maintenance counter values and the parameter values and keep
the printout. (Refer to Section 4.2 Diagnostics Test in the System Mode Manual.)
After replacing, restore the setting according to the printout.
2. Use precision screwdrivers for replacing the precision components which are installed into the printer.
2.1 Replacing the CPU PC Board
1) Turn off the printer.
2) Slide the Battery Lever in the direction of the arrow, and remove the Battery Pack from the printer.
3) Remove the four Tapping Screws from the Bottom Cover.
Battery Lever
Battery Pack
T-3x10 Screw
T-3x10 Screw

2. MAJOR UNIT REPLACEMENT EO18-33023
2.1 Replacing the CPU PC Board
2-2
4) Press the Top Cover Open Button to open the Top Cover.
5) Remove the Left Side Cover in the direction of the arrow.
6) Remove the Right Side Cover and the Front Cover in the direction of the arrow, respectively.
NOTE: The Gears shown in the picture below are not secured and are easily removed. Be carefu
l
not to drop and break or lose them.
Top Cover
Top Cover Open Button
Left Side Cover
Gea
r
Right Side Cover
Front Cove
r

2. MAJOR UNIT REPLACEMENT EO18-33023
2.1 Replacing the CPU PC Board
2-3
7) Remove the Front Cover.
6) Disconnect all Connectors and FPC Cable from the CPU PC Board.
NOTE: Before disconnecting the FPC Cable, release the Connector Lock.
7) Disconnect the Earth Terminal from the Drive PC Board.
Front Cover
CPU PC Board
FPC Cable
Connector Lock
CPU PC Board
Drive PC Board
Earth Terminal

2. MAJOR UNIT REPLACEMENT EO18-33023
2.1 Replacing the CPU PC Board
2-4
8) Open the Hooks, then remove the CPU PC Board from the Front Cover.
9) Remove the screw, then remove the Earth Terminal.
10) Replace the CPU PC Board with a new one, then reassemble in the reverse order of removal.
Hook
Hook
CPU PC Board
T-2x5 Screw
Earth Terminal

2. MAJOR UNIT REPLACEMENT EO18-33023
2.1 Replacing the CPU PC Board
2-5
11) Close the front cover.
12) Mount the left side cover to the printer while fitting the tabs on the left side cover into the slots of the printer
enclosure.
Fit the tabs A to D into the slots A’ to D’.
Front Cover
Tab Tab B Tab C Tab D
A
’
B’
C’
D’
NOTES:
1. Make sure that the pins on the both sides of the front cover are fit in position, as shown in the
pictures below.
2. Do not reassemble the Front Cover while the Top Cover Open Button is pressed. Doing so may
cause the Top Cover not to open.
Pin
Top Cover Open Button
Good No Good

2. MAJOR UNIT REPLACEMENT EO18-33023
(Revision Date: Dec. 16, 2008)
2.1 Replacing the CPU PC Board
2-6
13) Mount the right side cover to the printer while fitting the tabs on the right side cover into the slots of the
printer enclosure.
Fit the tabs A to C into the slots A’ to C’.
NOTE:
It is easy to mount the left side cover if you fit the tabs from the LCD side in order, then secure the bottom
side. Be careful not to catch the cable by the cover while reassembling.
Tab
A
Tab BTab C
A
’
B’
C’
NOTE:
It is easy to mount the right side cover if you fit the tabs from the LCD side in order, then secure the
bottom side. Be careful not to catch the cable by the cover while reassembling.
Right Side Cover
Left Side Cove
r

2. MAJOR UNIT REPLACEMENT EO18-33023
(Revision Date: Dec. 16, 2008)
2.1 Replacing the CPU PC Board
2-7
NOTES:
1. After replacing the CPU PC Board, refer to the Setting Operation Manual or System Mode Manual an
d
perform the following operations.
1. Perform a RAM clear.
2. Perform the sensor adjustment.
2. After replacing the CPU PC Board, perform an LED check in the system mode and make sure the LED
lights properly. If the LED does not light properly, this may result from the disconnection of the
harness from the CPU PC board, the unset battery, or the run-down battery, etc. Make sure the
connection of the cables and the battery status. When they are correct, the LED failure may result
from the initial failure of the CPU PC board and replace the CPU PC board with a correct one.
Regarding the procedures for the LED check, refer to Section 4.2.3 in the System Mode Manual.

2. MAJOR UNIT REPLACEMENT EO18-33023
2.2 Replacing the LCD Unit
2-8
2.2 Replacing the LCD Unit
1) Remove the Right Cover, Left Cover, Front Cover and CPU PC Board. (Refer to Section 2.1 Replacing the
CPU PC Board.)
2) Remove the three screws, then remove the LCD Unit.
3) Replace the LCD Unit with a new one, then reassemble in the reverse order of removal.
4) After replacing the LCD unit, perform an LCD check in the system mode and make sure none of dots are
missing. Regarding the procedures for the LCD check, refer to Section 4.2.4 in the System Mode Manual.
If the LCD does not display clearly, refer to Section 4.4.2 in the System Mode Manual and perform an LCD
density setting.
When the LCD dots are missing, make sure the LCD cable is surely connected to the CPU PC board. If the
connection of the cable is correct, the dot missing may result from the initial failure of the LCD and replace
the LCD unit with a correct one.
T-2x5 Screw Screw
LCD Unit
All backlights off
(3 seconds)
All backlights on
(3 seconds)

2. MAJOR UNIT REPLACEMENT EO18-33023
2.3 Replacing the Peel-off Roller
2-9
2.3 Replacing the Peel-off Roller
1) Remove the Right Cover, Left Cover and Front Cover. (Refer to Section 2.1 Replacing the CPU PC
Board.)
2) Remove the two Roller Clips with a straight slot screwdriver, then remove the Peel-off Roller Ass’y.
3) Remove the two Peel-off Rollers and the two Roller Clips from the Roller Shaft.
4) Replace the Peel-off Roller with a new one, then reassemble in the reverse order of removal.
Roller Clip
Straight Slot
Screwdriver
Peel-off Roller
Roller Clip
Peel-off Roller
Roller Shaft
NOTE: Be careful of the orientation of the Roller Clips as shown in the picture below when reassemblin
g
the Peel-off Rollers.
Roller Clip
Roller Clip

2. MAJOR UNIT REPLACEMENT EO18-33023
2.4 Replacing the Peel-off Sensor
2-10
2.4 Replacing the Peel-off Sensor
1) Remove the Right Cover, Left Cover and Front Cover. (Refer to Section 2.1 Replacing the CPU PC
Board.)
2) Disconnect the Connector from the CPU PC Board.
3) Pull out the Cover Shaft, then remove the Peel-off Sensor Unit.
4) Release the Peel-off Sensor Cover from the Hooks.
5) Remove the Peel-off Sensor.
Cover Shaft
Hook
Peel-off Sensor Unit
Hook
Peel-off Sensor Cover
Peel-off Sensor
Peel Off Sensor Unit
Connector
CPU PC Board

2. MAJOR UNIT REPLACEMENT EO18-33023
2.4 Replacing the Peel-off Sensor
2-11
6) Replace the Peel-off Sensor with a new one, then reassemble in the reverse order of removal.
NOTES:
1.Be careful of the orientation of the Peel-off Springs as shown in the picture below when reassemblin
g
the Peel-off Sensor Unit.
2. After replacing the Peel-off Sensor, refer to the Setting Operation Manual or System Mode Manua
l
and perform the following operations.
zPerform the sensor adjustment.
Peel-off Spring L Peel-off Spring R
Peel-off Sensor Unit

2. MAJOR UNIT REPLACEMENT EO18-33023
2.5 Replacing the Drive PC Board
2-12
2.5 Replacing the Drive PC Board
1) Remove the Right Cover, Left Cover and Front Cover. (Refer to Section 2.1 Replacing the CPU PC
Board.)
2) Disconnect all Connectors and FPC Cable from the Drive PC Board.
3) Remove the Drive PC Board from the Guide.
5) Replace the Drive PC Board with a new one, then reassemble in the reverse order of removal.
Drive PC Board
Drive PC Board
Guide
NOTE: Before disconnecting the FPC Cable, release the Connector Lock.
Connector Lock FPC Cable
Drive PC Board

2. MAJOR UNIT REPLACEMENT EO18-33023
2.6 Replacing the Battery Terminal
2-13
2.6 Replacing the Battery Terminal
1) Remove the Right Cover, Left Cover and Front Cover. (Refer to Section 2.1 Replacing the CPU PC
Board.)
2) Remove the Drive PC Board. (Refer to Section 2.5 Replacing the Drive PC Board.)
3) Hold down the Hook and remove the Battery Terminal upward.
4) Replace the Battery Terminal with a new one, then reassemble in the reverse order of removal.
Hook
Battery Terminal

2. MAJOR UNIT REPLACEMENT EO18-33023
2.7 Replacing the Stepping Motor
2-14
2.7 Replacing the Stepping Motor
1) Remove the Right Cover, Left Cover and Front Cover. (Refer to Section 2.1 Replacing the CPU PC
Board.)
2) Remove the two screws.
3) Disconnect the Connector from the Drive PC Board.
4) Remove the Stepping Motor.
Replace the Stepping Motor with a new one, then reassemble in the reverse order of removal.
Stepping Motor
SMW-3x8 Screw
Stepping Motor
Drive PC Board
Connector

2. MAJOR UNIT REPLACEMENT EO18-33023
2.9 Replacing the Cover Open Switch and Media Sensor (Lower)
2-15
2.8 Replacing the Print Head
1) Remove the Right Cover, Left Cover and Front Cover. (Refer to Section 2.1 Replacing the CPU PC
Board.)
2) Release the Hooks, then remove the Media Sensor Holder Ass’y upward.
3) Remove the right and left E-Rings.
NOTE: Carefully remove the E-Rings in order not to damage the Print Head Element.
4) Remove the right and left Shafts.
Media Sensor Holder
E-Ring
Print Head
Shaft E-Ring Shaft
CAUTION!
1. Before handling the print head, be sure to discharge static electricity in human body through other
metals. Failure to do this may damage the print head element.
2. Never touch the print head element directly by hands or hard objects. Doing so will damage the
element, causing a dot missing and a print failure.
Media Sensor Holder Ass’y
Hook

2. MAJOR UNIT REPLACEMENT EO18-33023
(Revision Date: Dec. 16, 2008)
2.9 Replacing the Cover Open Switch and Media Sensor (Lower)
2-16
5) Disconnect the Head FPC from the Print Head Connector.
NOTE: When reassembling the Head FPC, the contact portion should be faced upward.
6) Remove the Print Head Ass’y.
7) Disconnect the Head FPC Cable from the Drive PC Board Connector.
8) Replace the Print Head and Head FPC Cable with a new one, then reassemble in the reverse order of
removal.
Head FPC Cable
Drive PC Board
Print Head Connector
Head FPC
NOTES:
1. After replacing the Print Head, refer to the Setting Operation Manual or System Mode Manual an
d
perform the following operations.
zPerform a RAM clear.
2. After replacing the Print Head, perform the print head broken element check and make sure none o
f
the elements are broken. (Refer to Section 4.2.2 in the System Mode Manual.)
Also perform a test print and make sure the print qualit
y
is correct. (Refer to Section 4.6 in the System
Mode Manual.) If the print tone is dark or light, perform the print tone fine adjustment. (Refer to
Section 4.5.4 in the System Mode Manual.) If the media is smudged, this may result from the
smudged print head. In the case, refer to the Owner’s Manual and clean the print head.