This manual describes the disassembly, reassembly, and maintenance procedures of the line
thermal printer CBM1000. It is intended for field maintenance men.
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The CBM1000 is a compact-siz ed, line t herma l print er de velo pe d for a variety of a pplic atio ns. It
has abundant built -in fea tures, and ca n be used as a data comm unicat ion term inal, POS term inal,
kitchen terminal and for other applications. Prio r to using the printer, read this manual thoroughly to underst and its contents.
1. Paper drop-in mechanism; when supplying or replacing paper rolls, all you have to do is just
drop a paper roll into the printer and close its cover. This will facilita t e paper handling and
head cleaning greatly.
2. High speed (100 mm/s), and low-noise thermal printing.
3. Front-side paper ejection method, which allows the printer to be installed and used anyw here
with few restrictions.
4. Hermetic covering structure, which helps prevent any foreign matter or liquid from getting
into the printer.
5. Built-in input buffer.
6. Bar-code printing (Possible using special commands).
7. Page mode, which allows you to lay out pages freely.
8. Registration of user-def ined characters and logos into flash mem o ry.
9. Built-in Drawer Kick-Out interface.
10. Auto cutter mechanism provided as a standard unit.
11. Selection possible, as required, from two types: Easy-to-handle, built-in power supply type,
and lightweight f lat AC adapter type.
12. Use of 58 mm wide paper rolls possible by using the partition supplied.
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CBM1000 Service Manual
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1.HANDLING AND MAINTENANCE OF PRINTER ..........................................................................5
BAR, CODE 9 3
Line spacing4.23 mm (1/6 inch); sel e ct able using commands.
PaperThermal paper roll: 80 mm (58 mm) × ø83
InterfaceSerial (RS-232C)
Parallel (IEEE 1284 and Centronics compliant)
Input buffer4K bytes (72 bytes selectable with a DIP switch)
Supply voltageS type: AC 120/230 V ±10%; A type/D type: DC 24 V ±7%
Power consumption100 W (Max.)
AC adapter spec.Rated input : AC 120 ~ 240 V, 50/60 Hz, 120 VA
Rated output: DC 24 V, 1.9 A
—
Type31AD-U31AD-E—
WeightS type: Approx. 2.0 Kg; A type/D type: Approx. 1.4 Kg
Outer dimensionsS type: 145(W) × 190 (D) × 157 (H) mm
A type/D type: 145(W) × 190 (D) × 114 (H) mm
Operating temperature
5 ~ 40ºC, 35 ~ 85 % RH (No dew condensation)
and humidity
Storage temperature
-20 ~ 60ºC, 10 ~ 90% RH (No dew condensati on)
and humidity
ReliabilityPrinting head life:
Pulse resistance: 1 × 10
8
pulses (Print ratio 12.5%)
Wear resistance: 100 km (At normal temperature/humidity with re-
commended thermal paper)
Auto cutter life:
500,000 times of cutting (At normal temperature/humidity with recommended thermal paper)
Safety Standard *
2
UL, C-UL, FCC Class-A
TUV, GS, CE marking
UL, C-UL, FCC
Class-A, TUV, GS,
CE marking
*1 Represents the value when a 58 mm wide paper roll is used (User selectable).
2
*
Represents the safety standards acquired when CBM-made adapters (31AD series) are used.
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CBM1000 Service Manual
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For maintenance operat ions, note the following:
Notes:
(1) Do not disassemble/reassemble or adjust the machine, if it functions properly. Particularly,
(2) After completing an inspection and before turning on the power, be sure to check that there is
(3) During maintenance, be careful not to leave parts or screws unattached or loose inside the
(4) When handling the thermal head or electronic component, do not use gloves or other aids
(5) When disassembling or reassembling, check wires and cables for any damage. Do not run
(6) After reassembling, apply lubricant as required.
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(1) Philips screwdrivers #1 and #2
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do not loosen screws on any component, unless necessary.
no abnormality.
printer.
which can easily cause static electricity.
them into a narrow space o r set t hem in improper positions.
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(2) Tweezers
(3) Round nose pliers
(4) Cutting nipper
(5) Brush for lubrication
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CBM1000 Service Manual
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Disassembly procedure consists of the following two sections.
• Main body
• Mechanism
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1. Removing the Power Case SA (for AC Adaptrer Built-in Type)
(1) Disconnect the power connector from
the unit.
(2) Remove the four screws M3 ×8 (ST)
and detach the powe r c ase SA.
Power Connector
2. Removing the Printer Cover SA
(1) Open the printer cov e r S A.
(2) Unhook the parts “A” and detach the
printer cover SA.
(3) Remove the two screws M3 × 8 (BT).
While opening the parts “B”, remove
the par t “C”.
×
M3
8 (ST)
Power Case SA
C
B
Printer Cover SA
×
8 (BT)
M3
A
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3. Removing the Top Cover SA
(1) Remove the printer cover SA.
(2) Remove the two screws M3 × 6 (ST).
While unhooking the part “B” of the
frame from the top cover SA, lift the top
cover. At this time, avoid the power
switch.
(3) Unhook the operation panel cable from
the cable holder, disconnect the operation panel connector from the control
PCB assy, and remove the top cover SA.
Note on reassembling:
When reassembling the top cover SA,
B
CBM1000 Service Manual
Square Hole
Top Cover SA
M3×6 (ST)
Operation Panel
Connector
be sure that the part “B” of the frame is
securely inserted into the square hole
at the back of the top cover SA as
shown in the figure.
4. Removing the Mechanism Unit
(1) Remove the top cover SA.
(2) Remove the two screws M3 × 6 (ST).
(3) Disconnect the five connectors “A to E”
from the control PCB a ssy.
(4) Lift the front part of the mechanism
unit a little and remove the mechanism
unit by disengaging it from two square
holes on the bottom chassis.
Power Switch
Bottom Chassis
Square Hole
Cable Holder
Mechanism Unit
M3
×
6 (ST)
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CBM1000 Service Manual
5. Removing the Control PCB Assy
(1) Remove the mechanism unit.
(2) Remove the two screws M3 × 6 (ST).
(3) Lift the front part of the control PCB
assy to disengage the power switch
from the switch guide of the bottom
chassis SA.
Then pull the control PCB assy toward
you to remove it.
6. Removing the AC Adapter
(1) Remove the power case SA.
Control PCB Assy
M3×6 (ST)
Power Switch
Switch Guide
Bottom Chassis SA
(2) Cut the tie for the power cord.
(3) Detach the AC adapter from the power
case by lifting it upward.
(4) Detach the power cord of the AC adap-
ter from the power case SA.
(5) Remove the power connector of the AC
adapter by passing it through the hole
on the power case SA.
(6) Remove the four rubber feet from the
power case.
Note on reassembling:
Run the cable of the AC adapter as
shown in the figure. At this time, run
it so that the ferrite core is located as
shown in the figure (approx. 200 mm
from the end of the power connector).
Cord is fixed.
Tie
Ferrite Core
AC Adapter
Power
Connector
Rubber Foot
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Power Case
CITIZEN
7. Removing the Tear Bar
(1) Open the printer cov e r.
(2) Remove the tear bar from the printer
cover SA by pulling it as shown in the
figure.
Note on reassembling:
When reassembling, press-fit it to the
CBM1000 Service Manual
Printer Cover
printer cover.
8. Removing the Operat ion Panel SA and Front Cover
(1) Remove the top cover.
(2) Remove the operation panel SA to the
front by pushing its back.
(3) Remove the front cover.
9. Removing the Operat ion PCB Assy
(1) Remove the operation pane l SA.
(2) Remove the one screw M2.6 × 6 (BT)
Tear Bar
Top Cover
Front Cover
Operation Panel SA
M2.6×6 (BT)
Operation PCB Assy
and detach the operat ion PCB assy.
(3) Peel off the operation sheet from the
operation panel.
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Operation Sheet
Operation Panel
CITIZEN
CBM1000 Service Manual
10. Removing the Serial IF Plate
(1) Remove the control PCB as sy.
(2) Straighten the projections of the serial
IF plate and remove it from the bottom
chassis SA. (For serial IF type)
(3) Remove the one screw M3 × 6 for frame
ground (FG) and rubber feet from the
bottom chassis.
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1. Removing the Top Chassis SA
(1) Remove the Mechanism Unit referring
to 3.1.1-4 “Removing the Mechanism
Unit”.
(2) Unhook the head cable assy.
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M3
(ST, EXT, TW)
6
Rubber Foot
Top Chassis SA
Top Chassis SA
Serial IF Plate
Projection
Bottom Chassis
E-Ring, 2
Chassis Shaft
Brake Disc
(3) Disengage the E-ring 2 at the left end
of the chassis shaft.
(4) Pull out the chassis shaft to the right.
(5) While disengaging the projection of the
brake from the brake disc of the top
chassis SA, remove t he top chassis SA.
Brake
Head Cable Assy
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CBM1000 Service Manual
2. Removing the Platen SA
(1) While pushing the pressure arm
downwardly, turn the platen bushing
by 90 degrees in either direction.
(Then, the flat surfaces of the left side
platen bushing are set in vertical.)
(2) Lift the left side platen SA to disengage
it from the U-shaped groove on the
main chassis.
(3) Pull the platen SA to the left to remove
it from the main chassis.
3. Removing the Center Frame SA
(1) Remove the four screws M3 × 6 (BT).
(2) Remove the center frame SA from the
main chassis by lifting it upward.
Main Chassis
Pressure Arm
Platen Bushing
Platen SA
Center Frame SA
Center Frame SA
Flat Surface
Note on reassembling:
Pass the connector A and B through the
holes A and B on the main chassis, respectively.
M3×6 (BT)
Main Chassis
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CBM1000 Service Manual
4. Removing the Gears
(1) Remove the two screws M3 × 6 (ST)
and remove the gear holder.
(2) Remove the reduction gear and idle
gear from the gear holder, in that order.
Note on reassembling:
Apply grease (Molykote EM-10L) to the
shafts of the gear holder.
5. Removing the Auto Cutter SA
(1) Remove the four screws M3 × 6 (ST)
and remove auto cutter SA.
Main Chassis
Idle Gear
Reduction Gear
Gear Holder
M3×6 (ST)
Auto Cutter SA
Main Chassis
6. Removing the Lock Lev ers
(1) Remove the EXT spring-01.
(2) Pull out the ejector.
(3) Remove the lock lever-R-SA from the
right end of the lock lever-L-SA.
(4) Remove the lock lever-L-SA by pulling
it to the left.
M3×6 (ST)
EXT Spring-01
Main Chassis
Lock Lever-L-SA
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Lock Lever-R-SA
Ejector
CITIZEN
7. Removing the Pressure Arms
CBM1000 Service Manual
(1) Disengage the EXT spring-01 from the
pressure arm-L and then remove the
pressure arm-L from the main chassis.
(2) Disengage the EXT spring-01 from the
pressure arm-R and then remove the
pressure arm-R from the m ain chassis.
(3) Remove the one screw M3 × 6 (ST) from
the main chassis.
Note on reassembling:
Securely insert the pressure arm-L/R
into the screw heads.
8. Removing the Stepping Motor and Brake
(1) Remove the two screws M3 × 4 and de-
tach the stepping motor .
(2) Remove the one screw M3 × 6 (ST) and
Main Chassis
Main Chassis
Pressure Arm-R
M3×6 (ST)
EXT Spring-01
Pressure Arm-L
M3×6 (ST)
Brake
detach the brake.
Notes on reassembling:
Reassemble the brake in the direction
shown in the figure.
When reassembling t he ste pping m otor,
position it so that its cable runs downward as shown in the figure.
M3×4
Stepping Motor
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9. Removing the Top Chassis SA
CBM1000 Service Manual
(1) Unhook the head cable assy from the
cable holder.
(2) Detach the wire.
(3) Remove the two screws M2.6 × 6 (BT)
and detach the head cover.
(4) Remove the two screws M3 × 4 and de-
tach the thermal head. Then, discon-
nect the two connectors from the ther-
mal head.
(5) Remove the head cable assy by passing
its connectors A and B from the holes A
and B on the top chassis.
(6) Remove the one screw M3× 6 (BT) and
detach the damper block.
(7) Remove the roller from the damper.
10. Removing the Platen
(1) Disengage the two E-ring 4 from both
ends of the platen shaft.
Top Chassis
Cable Holder
Thermal Head
Head Cable Assy
M3×6 (ST)
Damper
M2.6×6 (BT)
M3×4
Roller
Head Cover
Wire Cover
Head Cover
Platen Bushing
E-Ring, 4
(2) Pull out platen gear from the left side
platen bushing.
(3) Pull out both platen bushings and dis-
engage the two E-ring 4 from the
platen.
Notes on reassembling:
Insert the two platen bushings so that
their flat surfaces face inw ard.
When inserting the platen gear, align
its hole with the D-cut on the platen
shaft.
Platen
Platen Gear
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11. Removing the Center Frame
(1) Remove the PNE lever assy, sensor
plate, guide roller and DIP SW cover
block.
CBM1000 Service Manual
Slider
DIP SW Cover
(2) Remove the one screw M2.6 × 6 (BT)
and detach the sensor PCB assy.
(3) Remove the slider from the DIP SW
cover.
Note on reassembling:
When reassembling the sensor PCB
assy, hook its one end and then install
it with the screw.
12. Removing the Auto Cutter and Its Peripheral Parts
(1) Remove the two screws M3 × 4 an d pull
out the auto cutter in the direction
shown by the arrow.
(2) Pull out safety cover shaft from the cut-
Auto Cutter
ter plate and safety cover.
Sensor Plate
PNE Lever Assy
Safety Cover
Center Frame
Guide Roller
×
M2.6
Sensor PCB Assy
Cutter Plate
M3×4
6 (BT)
(3) Remove the EXT spring-03.
(4) Detach the safety cover from the cutter
plate.
EXT Spring-03
Safety Cover Shaft
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Reassemble each part in t he reverse or der of the disa ssembly procedure descri bed in Sect ion 3.1.
If notes on reassembl ing are written, follow them.
A.Platen bushings and the platen shafts (2 places each)
B.Gear shafts of the gear holder (2 places)
C.Sliding surface of the brake disc
D. Lock shaft parts of the lock lever-R/L (2 places on both sides)
E. Sliding parts of the pressure arm-R/L (3 places on both sides)
F. U-shaped grooves of the main chassis, where the platen bushings are engaged (2 places
When a trouble occurs, confirm its phenomenon, locate a defective part in accordance with 4.2
Tro ub leshooting Guide, and troubleshoot a s des cribed below.
Phenomenon:Find a trouble phenomenon in this column. If there are multiple
l
Cause:Lists as many possible causes as possible. Guess a trouble cause out
l
Check Method: Describes a check method to specify a trouble cause.
l
Remedy:Tro ubleshoot by taking a remedy described in this column.
l
By troubleshooting in accordance with the above-mentioned procedure, you can troubleshoot efficiently with fewer misjudgments.
The fuse immediately goes again
after replacing with
new one.
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phenomena, take all the corresponding items into consideration.
This allows you to s pecify a hidden defect iv e part.
of them and take its check method to specify the trouble cause.
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The AC adapter is not
connected.
The fuse is gone.
The control PCB assy is
defective.
The circuit drive power
is abnormal.
Check whether any unspecified power has
been used so far.
Check whether the
specified fuse is used.
With a DC voltmeter,
measure the circuit
drive voltage.
Connect the specified
AC adapter.
Use the specified AC
adapter.
Use the specified fuse.
Replace the control P CB
assy.
Replace the control P CB
assy.
If the fuse is gone with the specified AC voltage supplied to the AC adapter, it is likely that the
T
thermal head unit or control PCB assy is defective. Replace either defective one. Incidentally,
check the wiring of the drawer an d interface cable.
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CITIZEN
CBM1000 Service Manual
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PhenomenonCauseCheck MethodRemedy
Faulty DC output voltage from the AC
adapter
Check whether the
specified AC adapter is
used.
Use the specified AC
adapter.
Faulty control PCB a ssyReplace the control P CB
assy.
Faulty connection of the
thermal head connector
Check connection of the
thermal head connector.
Connect the thermal
head connector prop-
erly. Or replace the
head cable assy.
Faulty thermal headReplace the thermal
head.
Partly not printed
Faulty connection of the
thermal head connector
Check connection of the
thermal head connector.
Connect the thermal
head connector prop-
erly. Or replace the
head cable assy.
Faulty thermal headReplace the thermal
head.
Faint printout or
uneven printout
Faulty DC output voltage from the AC
adapter
Check whether the
specified AC adapter is
used.
Use the specified AC
adapter.
Low DC output voltage
from the AC adapter
Check the DC voltage
with a DC voltmeter.
Supply the specified AC
voltage to the AC
adapter.
Faulty thermal headReplace the thermal
head.
Foreign substance is
adhered to the thermal
head.
Non-recommended paper is used.
Check whether any foreign substances are
adhered to the thermal
head.
Check whether the paper being used meets
Dip a cotton swab or
soft cloth in ethyl alco-
hol and wipe the foreign
substances with them.
Replace it with the
specified paper.
the specification.
Faulty mounting of the
platen roller
Check mounting condi-
tion of the platen roller.
Mount the platen roller
properly.
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CBM1000 Service Manual
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PhenomenonCauseCheck MethodRemedy
Paper is not fed or
fed irregularly
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Faulty connection of the
motor connector
Check connection of the
motor connector.
Defective motorMeasure the supply
voltage with a DC volt-
meter or oscilloscope.
Faulty DC output voltage from the AC
adapter
Low DC output voltage
from the AC adapter
Check whether the
specified AC adapter is
used.
Check the DC voltage
with a DC voltmeter.
Connect the connector
correctly.
If the supply voltage is
normal, replace the motor.
Use the specified AC
adapter.
Supply the specified AC
voltage to the AC
adapter.
Faulty control PCB a ssyReplace the control P CB
assy.
Faulty mounting of the
platen roller
Paper feed failureCheck whether or not
Check mounting condition of the platen roller.
the paper is jamming or
torn and caught in the
Mount the platen roller
properly.
Eliminate unnecessary
paper in the paper path
and set paper pro perly.
paper path.
Foreign substance in
the gear
Remove the gear holder
and check for any for-
Eliminate the foreign
substance.
eign substance caught
in the gears.
Broken gearRemove the gear holder
and check for any
If the gear is broken,
replace it with new one.
breakage of the gears.
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CITIZEN
CBM1000 Service Manual
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presence of paper .
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PhenomenonCauseCheck MethodRemedy
Faulty paper sensorCheck whether the ER-
ROR lamp flickers
Replace the sensor PCB
assy.
when paper is out.
Foreign substance is
attached to the paper
sensor.
Check whether any foreign substances are
adhered to the paper
Remove the foreign
substance.
sensor.
Faulty connection of the
paper sensor connector
Check connection of the
paper sensor connector.
Connect the connector
correctly.
Does not detect
paper near-end
status.
Faulty paper near-end
sensor
Foreign substance is
attached to the paper
near-end sensor.
Check whether the ERROR lamp flickers
when paper is out.
Check whether any foreign substances are
adhered to the paper
Replace the paper near-
end sensor.
Remove the foreign
substance.
near-end sensor.
Faulty connection of the
paper near-end sensor
connector
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PhenomenonCauseCheck MethodRemedy
The cutter does not
function.
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Faulty connection of the
auto cutter connector
Faulty DC output voltage from the AC
adapter
Defective auto cutterMeasure the supply
Paper feed failure
(Paper jam)
Check connection of the
paper near-end sensor
connector.
Check connection of the
auto cutter connector.
Check whether the
specified AC adapter is
used.
voltage with a DC voltmeter or oscilloscope.
Check whether or not
the paper is jamming or
torn and caught in the
Connect the connector
correctly.
Connect the connector
correctly.
Use the specified AC
adapter.
If the supply voltage is
normal, replace the
auto cutter.
Eliminate unnecessary
paper in the paper path
and set paper pro perly.
paper path.
If the no-paper condition is not detected while the printer is running out of the recording paper, it
T
will print without t he paper, leading to a trouble of the head, and s o on.
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CBM1000 Service Manual
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Ref. No.Parts No.DescriptionQ'tyRemarks
1E 4002-590Bottom Chassis1
2E 6302-370
3E 70010990Control PCB Assy (P)1
4E 70010995Control PCB Assy (R)
5
7E 4002-600Main Chassis1
8E 8017-110Stepping Motor1
9E 8032-120Pressure Arm-R1
10E 8021-130Pressure Arm-L1
1123G74985EXT Spring-013
12E 8012-030Lock Lever-R-SA1
13E 8013-040Lock Lever-L-SA1
14E 6602-140Ejector1
15E 6602-150Brake1
E 6601-410Serial IF Plate1
Rubber Foot (f10´3)
1/2
4
17E 8019-200Reduction Gear1
18E 8516-030Idle Gear1
19E 8500-100Gear Holder1