SATO WS408DT User manual

WS4 DT Series Printer
Service Manual
WS408DT / WS412DT
WS4-DT-r02-17-02-17SM
© 2017 SATO Corporation. All rights reserved.

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Contents
1Introduction................................................................................................................................ 1
1.1 About This Manual ............................................................................................................ 1
1.2 Warnings and Cautions..................................................................................................... 1
2Maintenance............................................................................................................................... 2
2.1 Print Head Maintenance.................................................................................................... 2
3Spare Parts List.......................................................................................................................... 3
4Spare Parts Removal and Assembly.......................................................................................11
4.1 Top Cover..........................................................................................................................11
4.2 Platen Roller and Front Cover........................................................................................ 12
4.3 Main Board and Bottom Cover....................................................................................... 13
4.4 Mid Cover......................................................................................................................... 15
4.5 Motor ................................................................................................................................ 15
4.6 Sensors............................................................................................................................ 17
4.7 TPH................................................................................................................................... 20
5Printer Status and Interface Connection ............................................................................... 21
5.1 Printer Status Indication ................................................................................................. 21
5.2 Printer Connector Pin Assignment................................................................................ 22

1
1 Introduction
1.1 About This Manual
This service manual gives the information necessary for you to adjust and repair the WS4 DT printer. This
service manual is written only for SATO authorized service personnel. The information in this manual is
confidential to general users.
This service manual is used as an extension of the operator manual. For basic specification, Installation,
operation and configurations of the printer, refer to the operator manual of the WS4 DT printer.
1.2 Warnings and Cautions
Before doing maintenance, please notice the following:
Put the device in a safe place.
Please keep the device in a clean and dry area.
WARNING
When replace or install any parts, please check following:
Turn off power.
Disconnect the power cord of the AC Adapter.
Disconnect the USB cable.
CAUTION (Static Discharge)
The printer electronics are sensitive to static discharge.
Wear an anti-static wristband and attach it to the printer chassis.
CAUTION (Replace Parts)
Please do not wear jewelry.
Please do not get hands and parts wet.

2
2 Maintenance
2.1 Print Head Maintenance
Warning: Always turn off the printer before cleaning.
It is essential to keep print head clean if you want the best printing quality. We strongly recommend that
you clean the print head when loading a new media roll. If the printer is operated in critical environment or
the print quality declines, you need to clean the print head more frequently.
Keep in mind these things before you clean TPH:
Keep water away in case of corrosion on heating elements.
If you just finish printing, wait until the print head cools down.
Do not touch the print head with bare hands or hard objects.
Cleaning Steps:
1. Moisten a soft cloth or a cotton swab with ethyl alcohol.
2. Gently wipe the print head in one direction. That is, wipe it only from left to right or vice versa. Do not
wipe back-and-forth, in case dust or dirt attaches to the print head again.
Note: Print head warranty becomes void if print head’s serial number is
removed, altered, defected or made illegible, under any circumstance.

3
3 Spare Parts List
Parts Number
Description
Picture
WD204-001
PRINT HEAD (203dpi) WS408DT
WD301-001
PRINT HEAD (300dpi) WS412DT
59-WD2A1-001
ASSY-PLATEN-WS4DT-ST
59-WD2A2-001
ASSY-SENSORS-WS4DT
59-WT2A3-001
ASSY-MAIN-PCBA-WS4-LAN
(USB + LAN)
59-WT2A3-011
ASSY-MAIN-PCBA-WS4-STD
(USB + LAN + RS232C)

4
Parts Number
Description
Picture
59-WD2A3-001
ASSY-MOTOR-WS4DT
59-WD2A4-001
SW-PSU-WS4DT
59-WD2A4-011
SW-PSU-WS4DT-CN
59-WD2A5-001
ASSY-PANEL-PCBA-WS4DT
59-WD2A6-001
HRNS-PRINT-HEAD-WS4DT

5
Parts Number
Description
Picture
59-WD2A7-001
GEARS-WS4DT
59-WD2A8-001
SPRING-PRINT-HEAD-WS4DT
59-WD2A9-001
ASSY-TOP-COVER-WS4DT-ST
59-WD2B1-001
MID-COVER-WS4DT-ST
59-WD2B2-001
UPPER-CHASSIS-WS4DT
59-WD2B3-001
ASSY-MEDIA-HLDR-R-WS4DT-ST

6
Parts Number
Description
Picture
59-WD2B4-001
ASSY-MEDIA-HLDR-L-WS4DT-ST
59-WD2B5-001
BOTTOM-COVER-WS4DT-LAN
59-WD2B5-011
BOTTOM-COVER-WS4DT-STD
59-WD2B6-001
FRONT-COVER-WS4DT
59-WD2B9-001
PANEL-CABLE -WS4DT

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Parts Number
Description
Picture
59-WD2C1-001
LOWER-CHASSIS-WS4DT
59-WD2C2-001
RACK-HOLDER-SIDE-WS4DT
59-WD2C7-001
RACK-HOLDER-MID-WS4DT
59-WD2C4-001
LATCH-WS4DT
59-WD2C5-001
HINGE-COVER-WS4DT-ST

8
Parts Number
Description
Picture
59-WD2C6-001
SHAFT-LATCH-WS4DT
59-WD2A4-021
SW-PSU-WS4DT-EX1
59-WD2C7-001
POWER-CORD-WS4DT-CN
59-WD2C7-061
POWER-CORD-WS4DT-EX1
59-WD2C7-031
POWER-CORD-WS4DT-EU
(For EU, VN-NESIA and KR Area Code)

9
Parts Number
Description
Picture
59-WD2C7-011
POWER-CORD-WS4DT-UK
(For UK, SP and MY Area Code)
59-WD2C7-021
POWER-CORD-WS4DT-TH
59-WD2C7-041
POWER-CORD-WS4DT-IND
59-WD2C7-051
POWER-CORD-WS4DT-PA
59-WD2C7-071
POWER-CORD-WS4DT-BR

10
Parts Number
Description
Picture
59-WD2C7-081
POWER-CORD-WS4DT-AR

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4 Spare Parts Removal and Assembly
4.1 Top Cover
Open the top cover. (Figure A-1)
1Use screwdriver to loosen the 4 screws
which marked in orange. Disconnect cable
to feed button. (Figure A-1)
2Take off the top cover. (Figure A-2)
Warning:
Always turn off printer power before removal.
A-1
A-2

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4.2 Platen Roller and Front Cover
Platen Roller
1. Remove the dispenser plate by lifting it
upward. (Figure B-1)
2. Slightly push both pinches to release the
platen roller from printer module as shown
in Figure B-1, and then pull the two pinches
upward to take off the platen roller. (Figure
B-2)
Warning:
Always turn off printer power before removal.
B-1
B-2

13
4.3 Main Board and Bottom Cover
1. Put the printer up-side-down, loosen screws
to remove the power cover. Continue to
loosen the 4 screws which marked in yellow
to remove the bottom cover. (Figure C-1)
2. Disconnect all cables from MB then lift up
the whole printer module. (Figure C-2)
3. Use screwdriver to loosen the 2 screws
which marked in orange. Now, the main
board and bottom cover can be taken out
separately. (Figure C-3)
Warning:
Always turn off printer power before removal.
Caution:
When disconnect the power cord, please wait 10
seconds before removing any connectors from
the printer.
C-1
C-2

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C-3

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4.4 Mid Cover
1. Remove the main board and bottom cover
first
2. Pull the mid cover downward and take out it.
(Figure D-1)
Warning:
Always turn off printer power before removal.
Before replacing TPH, please wait for the
printer head temperature to cool.
D-1
4.5 Motor
1. Remove the mid cover of the printer first,
and then cut cable tie which locates the
cable of motor as shown in Figure E-1.
2. Using screwdriver to loosen the 3 screws
from the printer module. (Figure E-2)
3. Take the motor as shown in Figure E-3
Warning:
Always turn off printer power before removal.
Caution:
When disconnect the power cord, please wait
10 seconds after removing any connectors
from the printer.
Wait for the motor temperature to cool.
E-1

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E-2
E-3

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4.6 Sensors
Transmissive Sensor
1. Take off the top cover(refer to dissemble
the top cover). (Figure F-1)
2. Use screwdriver to loosen the 2 screws
which are marked in yellow, and draw out
the shaft from the latch. (Figure F-2)
3. Then we can see the Transmissive Sensor
and dissemble it. (Figure F-3)
Reflective Sensor
1. Remove the bottom cover main board
mid cover and motor. (Refer to the
procedure 4.3)
Then we can see the Reflective Sensor
which is marked in orange. (Figure F-4)
2. Dissemble the Reflective Sensor from
bottom side of the printer. (Figure F-4)
3. From upside of the printer to disconnect
the cable from the Reflective Sensor.
(Figure F-5)
Warning:
Always turn off printer power before
removal.
F-1
F-2

18
F-3
F-4