Citizen CT-S281 Series User manual

Service Manual
LINE THERMAL PRINTER
MODEL CT-S281 Series
Rev. 1.00 Issued on January 13, 2009

CT-S281 SERIES Service Manuall
CITIZEN is a registered trade mark of CITIZEN HOLDINGS CO., LTD., Japan.
CITIZEN es una marca registrada de CITIZEN HOLDINGS CO., LTD., Japón.
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REVISION
Rev. Date Page Comment
1.00 2009/ 1/ 13 Newly issued

CT-S281 Service Manual
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CONTENTS
INTRODUCTION.......................................................................................................................................3
1. DISASSEMBLY AND REASSEMBLY...............................................................................................3
1.1 Tools Used.........................................................................................................................................3
1.2 Disassembly Procedure...................................................................................................................4
1.2.1 Removing “UNIT, MAIN PCB”..................................................................................................4
1.2.2 Removing “AUTO CUTTER”......................................................................................................8
1.2.3 Removing “UNIT, MECHANISMS”...........................................................................................9
1.2.4 Removing “CASE U”................................................................................................................10
1.2.5 Removing “UNIT, PLATEN”....................................................................................................11
1.2.6 Removing “BLADE,FIXED”......................................................................................................12
1.2.7 Removing “SA,SUB PCB PE SENSOR”...................................................................................13
1.2.8 Removing “UNIT,PNE SENSOR”............................................................................................14
1.2.9 Removing “CONDUCTOR,LED”..............................................................................................15
1.2.10 Removing “PAPER CUTTER” ..............................................................................................16
1.2.11 Removing “CAP, CASE U”...................................................................................................16
2. Memory Switch Setting.................................................................................................................17
3. TROUBLESHOOTING.......................................................................................................................18
3.1 Error Indication...............................................................................................................................18
3.2 Troubleshooting Procedure...........................................................................................................20
3.3 Troubleshooting Guide..................................................................................................................20
4. SERVICE PARTS LIST.....................................................................................................................23
4.1 Parts LIST for Mechanism.............................................................................................................23
4.2 List of Electric Part.........................................................................................................................27
4.3 Parts Configuration........................................................................................................................28
4.3.1 Main Control Board (Serial)....................................................................................................28
4.3.2 Main Control Board (USB)......................................................................................................29
5. CIRCUIT DIAGRAM.........................................................................................................................30
5.1 Main Control Board........................................................................................................................30
5.1.1 Main Control Board (CPU)......................................................................................................30
5.1.2 Main Control Board (Memory)...............................................................................................31
5.1.3 Main Control Board (Export)..................................................................................................32
5.1.4 Main Control Board (Head)....................................................................................................33
5.1.5 Main Control Board (Motor)...................................................................................................34
5.1.6 Main Control Board (Senor)...................................................................................................35
5.1.7 Main Control Board (Interface).............................................................................................36
5.1.8 Main Control Board (Power)..................................................................................................37
5.2 PNE Sensor......................................................................................................................................38
5.3 Operation Panel..............................................................................................................................38

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INTRODUCTION
This manual describes the disassembly, reassembly, and maintenance procedures of CT-S281SERISS.
1. DISASSEMBLY AND REASSEMBLY
Notes the following items when maintaining the printer.
• Do not disassemble, reassemble, or adjust the printer unnecessarily when the printer operation is
satisfactory.
• Do not loosen the screws fixing each component carelessly.
• After finishing inspection, perform checking for normality before turning on the printer.
• Pay attention not to leave the part or screws used for maintenance inside the printer.
• When handling the print head and electronic components, pay attention to static electricity.
• When disassembling or reassembling the printer, check the wiring and cord for damage. Pay attention not
to lay the wiring and cord by force.
• Lubricate the components as necessary when reassembling them.
1.1 Tools Used
• Phillips screwdriver #0, #1, and #2
• Tweezers

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1.2 Disassembly Procedure
1.2.1 Removing “UNIT, MAIN PCB”
< Attention at reassembly >
Don't catch the cable of “UNIT,MECHANISMS”
between the cases.
< Attention at reassembly >
Don't catch the cable between the cases.
3. Remove “CASE U” backward.And remove
“CASE U” from “CASE L”.
< Attention at disassembly / reassembly >
“CASE U” and “CASE L” are fixed with hook.
Carefully disassemble, and reassemble it so as
not to dama
g
e it.
1. Open “COVER”. And remove the two
“SCREW,PHT
(
BT#3
)
,M3.0×8” of the bottom.
2. The rear side of “CASE U” is opened a little.
SCREW
,
PHT
(
BT#3
),
M3.0×8
CASE U
CASE L

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5. Remove the two
“SCREW,PHT
(
BT#3
)
,M3.0×8”.
< Attention at reassembly >
Pass cabe of “SA,SUB PCB OPE-PANE” the under
throu
g
h “UNIT
,
MECHANISMS”.
< Attention at reassembly >
Insert the connector to the last minute.
< Attention at disassembly >
The connector is floated with tweezers.Insert the
connector to the last minute. And the connector
is
p
ulled out carefull
y
so as not to dama
g
e it.
4. Remove cable from “UNIT, MAIN PCB”.
S
A
,SU
B P
C
B
O
PE-PANE
UNIT
,
MECHANISMS
SCREW
,
PHT
(
BT#3
),
M3.0×8

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< Attention at reassembly >
Don’T insert FFC diagonally.And insert FFC to
the last minute.
6. Remve UNIT,MECHANISM .And remove
cable , FFC from “UNIT,MAIN PCB”.
UNIT,MAIN PCB
FFC
CN9 UNIT
,
PNE SENSOR
CN5 MECHANISMS
CN4 MECHANISMS
CN10 SA
,
SUB PCB OPE-PANE
CN7 AUTO CUTTER
CN6 SA
,
SUB PCB PE SENSOR

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8. Remove “INSULATOR”to careful “UNIT,MAIN PCB”.
< Attention at reassembly >
Don
’
t float the power
switch.
7. The power switch of “UNIT,MAIN PCB” is floated from “CASE L” a little.
Power switch
IN
SU
LAT
O
R

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1.2.2 Removing “AUTO CUTTER”
<Attention at reassembly>
Hang “AUTO CUTTER” on the Projections.
<Attention at reassembly>
The position of the cable of “AUTO CUTTER” is
as follows.
2. Widen “FRAME” a little, remove , “AUTO CUTTER”.
< Attention at disassembly >
Do not transform “FRAME”by expanding it in
excess.
1. Remove the two
“SCREW,PHT(ST#3),M3.0×6”.
SC
REW
,
PHT
(S
T#
3),
M
3
.
0
×
6
FRAME
A
U
T
O
CU
TTER

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1.2.3 Removing “UNIT, MECHANISMS”
< Attention at reassembly >
Turn the cable of “MLT4280KS-281” to the cable
of “AUTO CUTTER”
< Attention at reassembly >
Pass FFC through the hole of the “FRAME”.
1. Remove the two “SCREW,No.0,PHT(ST#3),M2.0×4”.
SCREW
,
No.0
,
PHT
(
ST#3
),
M2.0×4 MLT4280KS-281

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1.2.4 Removing “CASE U”
1. Remove “COVER” from “CASE U”.
< Attention at disassembly / reassembly >
Don't have the stopper of “COVER”, because it
has the possibility of damaging.
COVER

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1.2.5 Removing “UNIT, PLATEN”
2. Remove the one side of “SA, PLATEN ECR” and “SA, PLATEN ECR”.
1. Remove the two “SCREW,PHT(BT#3),M3.0×8”.
SCREW
,
PHT
(
BT#3
),
M3.0×8
U
NIT
,
PLATEN
SA
,
PLATEN ECR

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1.2.6 Removing “BLADE,FIXED”
< Attention at reassembly >
Fix
“
Fix Brade
”
to the two Projections.
1. Remove “SCREW,No.0,PHT(BT#3),M2×4” and “BLADE,FIXED”.
SC
REW
,
N
o
.
0,
PHT
(
BT#
3),
M2×4 BLADE
,
FIXED
H
O
LDER PLATEN TE

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1.2.7 Removing “SA,SUB PCB PE SENSOR”
< Attention at reassembly >
Fix “SA,SUB PCB PE SENSOR” to the
Pro
j
ection.
< Attention at reassembly >
Confirm the correct operation by pushing “SA,SUB
PCB PE SENSOR
”
.
< Attention at reassembly >
Pass “SA,SUB PCB PE SENSOR” like the
Mark.
1. Remove “SCREW,PHT(BT#3),M2.6×5” and “SA,SUB PCB PE SENSOR”.
SC
REW
,
PHT
(
BT#
3),
M2.
6
×
5
S
A
,SU
B P
C
B PE
S
EN
SO
R

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1.2.8 Removing “UNIT,PNE SENSOR”
< Attention at reassembly >
Confirm the correct operation by pushing
“UNIT,PNE SENSOR”.
< Attention at reassembly >
Hang the cable of “UNIT,PNE SENSOR” on the
hook.
2. Remove “UNIT,PNE SENSOR” from the Projection of “CASE U”.
1. Remove the two “SCREW,PHT(BT#3),M2.6×5” and “SPRING,PNE HOLDER”from the
Pro
j
ection of “CASE U”.
SC
REW
,
PHT
(
BT#
3),
M2.
6
×
5
S
PRIN
G,
PNE H
O
LDER
UNIT
,
PNE SENSOR

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1.2.9 Removing “CONDUCTOR,LED”
2. Remove “CONDUCTOR,LED” and “CONDUCTOR,LED”.
< Attention at disassembly / reassembly >
Note the lock.
< Attention at disassembly / reassembly >
Treat Operation Panel Assy carefully, because
LED of Operation Panel has the possibility of
dama
g
in
g
.
1. Remove the two “SCREW,PHT(BT#3),M2.6×5”.
SCREW,PHT(BT#3),M2.6
×
CONDUCTOR,LED
SA
,
SUB PCB OPE-PANE

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1.2.10 Removing “PAPER CUTTER”
1.2.11 Removing “CAP, CASE U”
< Attention at reassembly >
“SPRING BAR” shrinks. Insert one of “SPRING BAR” in “CASE U”. shrink the other “SPRING BAR” with the
fingernail,and insert it in “CASE U” .
1. Remove “CAP, CASE U”carefully, because it has the possibility of damaging.
< Attention at disassembly / reassembly > Treat Manual cutter carefully, because it is sharp.
1. Remove the two “SCREW,No.0,PHT(BT#1),M2×5” and “PAPER CUTTER”.
SC
REW
,
N
o
.
0,
PHT
(
BT#1
),
M2×
5
PAPER
CU
TTER
SPRING BA
R
C
AP
,
C
A
S
E
U

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2. Memory Switch Setting
It is registered in the printer as follows by the option of the factory. They are different by the model, and
not possible to change
(1) Printer Name of the self-printing
(2) Printer Name of the self-printing
(3) Initial value
However, the above-mentioned is unrelated to the function it. It is possible to correspond by changing the
Memory Switch.
Destination
Memory Switch Setting is as follows.
CT-S 281 RS J - WH - PX
Table Destination
Destination MSW9-1
Code Page MSW9-2 Int’Char Set MSW9-3 Kanji
J : Japan Katakana Japan ON
U/E: US/EU/Other PC437 U.S.A OFF
PNE Sensor
Memory Switch Setting is as follows.
CT-S 281 RS J - WH - PX
Table PNE Sensor
PNE Sensor MSW2-8
PNE Sensor
No mark : Without sensor ON Invalid
P : PNE sensor OFF Valid
< Attention >
“CT-S281***-**-PX “is voidable by Memory Ssitch Setting.
“CT-S281***-**” is not made effective only by Memory Ssitch Setting. It is necessary to exchange
MAIN PCB and add PNE Sensor.

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3. TROUBLESHOOTING
3.1 Error Indication
zPaper end
Paper out is detected in two steps: paper near-end and paper end. ERROR LED will light when the
paper is empty. If paper end is detected, refill the paper. If the printer cover is open, a paper-end is
detected.
zCover open
During printing, do not open the platen. If you open the printer cover accidentally, the ERROR LED
blinks. Check the paper, pull the paper straightforward several cm (or inches) out of the printer, and
then close the Platen. Printing resumes automatically. Sending a command to resume printing may be
required depending on the memory switch setting.
zThermal head overheat
When you print dense characters or dark image, the head temperature rises. If the head temperature
exceeds a specified level, the printer stops printing operation and waits till the head temperature is
lowered. During waiting, the ERROR LED blinks. When the head temperature is lowered, printing
resumes automatically.
zCutter lock
If the cutter blade stops operating due to paper jam or the like, the ERROR LED blinks. Remove the
cause of the trouble and press the FEED button. If the blade still does not move and the printer cover
cannot be opened, do not open the paper cover forcibly. Open Cutter Gear Cover and turn Cutter Gear
under the protection seat in the direction of arrow.
When you find that both ends of the blade reached the lowest position, stop turning the screwdriver.
Open the cover and follow the procedure of removing jam or other cause of trouble.
Cutter Gear
Cutter Gear Cover

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Lighting and blinking status of each error including the above is shown below.
Caution: In many cases, “Low voltage error” is caused by blown F3 fuse.Please check the conduction of
F3 fuse.
Content of Error POWER LED
(Green) ERROR LED (Red) PAPER LED (orange)
[1] Head overheat error
ON
OFF
1) Error to recover
automatically
[2] Platen open error
MSW3-8 OFF:
With automatic return set
ON
OFF
[1] Platen open error
MSW3-8 ON:
With recoverable feature
set
ON OFF
2) Recoverable
error
[2] Cutter lock error
ON
OFF
[1] Memory check error
ON OFF
[2] Low voltage error
ON
OFF
3) Not recoverable
error
[3] High voltage error
ON
OFF
[1] Paper near end
ON OFF ON
[2] Paper end
ON ON ON
[3] Cover open
ON ON OFF
4) Other state
[4] Waiting for macro
execution
ON OFF