Citizen CBM-1000 User manual

CITIZEN
Service Manual
Model: CBM1000
Line Thermal Printer
Rev. 1.00 Newly issued on Sep. 14. 1999
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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-sized, line thermal printer developed for a variety of applications. It
has abundant built-in features, and can be used as a data communication terminal, POS terminal,
kitchen terminal and for other applications. Prior to using the printer, read this manual thor-
oughly to understand 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 facilitate 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 anywhere
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-defined characters and logos into flash memory.
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 flatAC adapter type.
12. Use of 58 mm wide paper rolls possible by using the partition supplied.

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1. HANDLING AND MAINTENANCE OF PRINTER ..........................................................................5
2. SPECIFICATIONS ...............................................................................................................................6
2.1 Basic Specifications ....................................................................................................................6
3. DISASSEMBLY AND REASSEMBLY ................................................................................................7
3.1 Disassembly Procedure...............................................................................................................8
3.1.1 Disassembly Procedure for Main Body.........................................................................8
3.1.2 Disassembly Procedure for Mechanism Unit.............................................................12
3.2 Reassembly Procedure..............................................................................................................17
3.3 Lubrication................................................................................................................................18
3.3.1 Lubricant.......................................................................................................................18
3.3.2 Where to Lubricate.......................................................................................................18
4. TROUBLESHOOTING ......................................................................................................................19
4.1 Troubleshooting Procedure..………………………………………………………………..………19
4.2 Troubleshooting Guide.. ..…………………………………………………………………….……..19
5. SERVICE PARTS LIST......................................................................................................................23
5.1 Parts List for Mechanism.........................................................................................................23
5.2 Disassembly Drawing...............................................................................................................25
5.3 Parts List for Control PCB Assy .............................................................................................27
5.3.1 Control PCB Assy ......................................................................................................27
5.4 Parts Layout Drawing..............................................................................................................30
5.4.1 Control PCB Assy (Serial Interface D-sub 25)............................................................30
5.4.2 Control PCB Assy (Parallel Interface) ........................................................................31
5.4.3 Operation PCB Assy.....................................................................................................32
5.4.4 Sensor PCB Assy...........................................................................................................33
5.4.5 PNE PCB Assy in PNE Lever Assy.............................................................................34
6. DRAWING...........................................................................................................................................35
6.1 Block Diagram..........................................................................................................................36

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6.2 Circuit Diagram........................................................................................................................37
6.2.1 Control PCB Assy (Serial Interface D-sub 25)............................................................37
6.2.2 Control PCB Assy (Parallel Interface) ........................................................................38
7. OUTER DIMENSION ........................................................................................................................39
TFor the auto cutter unit (ACS-130), see the separate Service Manual.

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See the User’s Manual coming with the printer body.

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Model
Item CBM1000–RF120S/A
CBM1000–PF120S/A CBM1000–RF230S/A CBM1000–PF230S/A CBM1000–RF024D CBM1000–PF024D
Printing system Line thermal dot printing method
Printing width 72 mm/576 dots, (54 mm/432 dots) *1
Dot density 8 × 8 dots/mm (203 dpi)
Printing speed 100 mm/sec (Fastest, print density level 2), (800 dot lines/sec)
Printing columns FontA: 48/42/36/30 columns (12 × 24)
Font B: 64/56/48/40 columns (9 × 24)
Character size FontA: 1.25 × 3.00 mm; Font B: 0.88 × 3.00 mm
Character types Alphanumeric characters, unternational characters, Codepages PC437,
Katakana, PC850, PC860, PC863, PC865, PC852, PC866, PC857, and
Windows codepage
Logo registration/print Capable of registering user-defined characters and logos into flash mem-
ory.
Bar code types UPC-A/E, JAN(EAN) 13/8 column, ITF, CODE 39, CODE 128, CODE-
BAR, CODE 93
Line spacing 4.23 mm (1/6 inch); selectable using commands.
Paper Thermal paper roll: 80 mm (58 mm) × ø83
Interface Serial (RS-232C)
Parallel (IEEE 1284 and Centronics compliant)
Input buffer 4K bytes (72 bytes selectable with a DIP switch)
Supply voltage S type: AC 120/230 V ±10%;A type/D type: DC 24 V ±7%
Power consumption 100 W (Max.)
AC adapter spec. Rated input :AC 120 ~ 240 V, 50/60 Hz, 120 VA
Rated output: DC 24 V, 1.9 A —
Type 31AD-U 31AD-E —
Weight S type: Approx. 2.0 Kg; A type/D type: Approx. 1.4 Kg
Outer dimensions S type: 145(W) × 190 (D) × 157 (H) mm
A type/D type: 145(W) × 190 (D) × 114 (H) mm
Operating temperature
and humidity 5 ~ 40ºC, 35 ~ 85 % RH (No dew condensation)
Storage temperature
and humidity -20 ~ 60ºC, 10 ~ 90% RH (No dew condensation)
Reliability Printing head life:
Pulse resistance: 1 × 108pulses (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 re-
commended 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
*1Represents the value when a 58 mm wide paper roll is used (User selectable).
*2Represents the safety standards acquired when CBM-made adapters (31AD series) are used.

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For maintenance operations, note the following:
Notes:
(1) Do not disassemble/reassemble or adjust the machine, if it functions properly. Particularly,
do not loosen screws on any component, unless necessary.
(2) After completing an inspection and before turning on the power, be sure to check that there is
no abnormality.
(3) During maintenance, be careful not to leave parts or screws unattached or loose inside the
printer.
(4) When handling the thermal head or electronic component, do not use gloves or other aids
which can easily cause static electricity.
(5) When disassembling or reassembling, check wires and cables for any damage. Do not run
them into a narrow space or set them in improper positions.
(6) After reassembling, apply lubricant as required.
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(1) Philips screwdrivers #1 and #2
(2) Tweezers
(3) Round nose pliers
(4) Cutting nipper
(5) Brush for lubrication

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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 Adap-
trer Built-in Type)
(1) Disconnect the power connector from
the unit.
(2) Remove the four screws M3 ×8 (ST)
and detach the power case SA.
2. Removing the Printer Cover SA
(1) Open the printer cover SA.
(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 part “C”.
Power Connector
Power Case SA
M3×8 (ST)
Printer Cover SA
M3×8 (BT)
B
A
C

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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 opera-
tion panel connector from the control
PCB assy, and remove the top cover SA.
Note on reassembling:
When reassembling the top cover SA,
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 assy.
(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.
Operation Panel
Connector
M3×6 (ST)
Top Cover SA
Power Switch Cable Holder
Mechanism Unit M3×6 (ST)
Bottom Chassis
Square Hole
Square Hole
B

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5. Removing the Control PCBAssy
(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.
(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).
Control PCB Assy
M3×6 (ST)
Power Switch
Switch Guide
Bottom Chassis SA
Cord is fixed.
Tie
Ferrite Core
AC Adapter
Power
Connector
Rubber Foot Power Case

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7. Removing the Tear Bar
(1) Open the printer cover.
(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
printer cover.
8. Removing the Operation Panel SAand 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 Operation PCBAssy
(1) Remove the operation panel SA.
(2) Remove the one screw M2.6 × 6 (BT)
and detach the operation PCB assy.
(3) Peel off the operation sheet from the
operation panel.
Printer Cover
Tear Bar
M2.6×6 (BT)
Operation PCB Assy
Operation Sheet
Operation Panel
Top Cover
Front Cover
Operation Panel SA

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10. Removing the Serial IF Plate
(1) Remove the control PCB assy.
(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.
(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 the top chassis SA.
Serial IF Plate
M3×6
(ST, EXT, TW)
Bottom Chassis
Projection
Rubber Foot
Top Chassis SA
E-Ring, 2
Head Cable Assy
Chassis Shaft
Brake Disc
Top Chassis SA
Brake

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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.
Note on reassembling:
Pass the connector A and B through the
holes A and B on the main chassis, re-
spectively.
Center Frame SA
M3×6 (BT)
Main Chassis
Center Frame SA
Platen Bushing
Platen SA
Flat Surface
Pressure Arm
Main Chassis

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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.
6. Removing the Lock Levers
(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.
Main Chassis
Idle Gear
Reduction Gear
Gear Holder
M3×6 (ST)
Auto Cutter SA
Main Chassis
M3×6 (ST)
Lock Lever-R-SA
Main Chassis
EXT Spring-01
Ejector
Lock Lever-L-SA

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7. Removing the Pressure Arms
(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 main 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
detach the brake.
Notes on reassembling:
Reassemble the brake in the direction
shown in the figure.
When reassembling the stepping motor,
position it so that its cable runs down-
ward as shown in the figure.
M3×6 (ST)
Main Chassis Pressure Arm-R
EXT Spring-01
Pressure Arm-L
M3×6 (ST)
Main Chassis
Brake
M3×4
Stepping Motor

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9. Removing the Top Chassis SA
(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 connectorsA 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.
(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 inward.
When inserting the platen gear, align
its hole with the D-cut on the platen
shaft.
Platen Gear
Platen
Platen Bushing
E-Ring, 4
Head Cover
M3×6 (ST)
Cable Holder
M3×4
Damper
Wire Cover
M2.6×6 (BT)
Thermal Head
Roller
Top Chassis
Head Cable Assy
Head Cover

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11. Removing the Center Frame
(1) Remove the PNE lever assy, sensor
plate, guide roller and DIP SW cover
block.
(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 and pull
out the auto cutter in the direction
shown by the arrow.
(2) Pull out safety cover shaft from the cut-
ter plate and safety cover.
(3) Remove the EXT spring-03.
(4) Detach the safety cover from the cutter
plate.
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Reassemble each part in the reverse order of the disassembly procedure described in Section 3.1.
If notes on reassembling are written, follow them.
PNE Lever Assy
Slider
Center Frame
Guide Roller
DIP SW Cover
Sensor Plate
M2.6×6 (BT)
Sensor PCB Assy
Safety Cover
M3×4
EXT Spring-03
Auto Cutter
Cutter Plate
Safety Cover Shaft

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Apply the specified lubricant to the indicated places.
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Grease: Molykote EM-10L
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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)
(See the following figure.)
E. Sliding parts of the pressure arm-R/L (3 places on both sides)
(See the following figure.)
F. U-shaped grooves of the main chassis, where the platen bushings are engaged (2 places
on both sides)
(See the following figure.)

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When a trouble occurs, confirm its phenomenon, locate a defective part in accordance with 4.2
Troubleshooting Guide, and troubleshoot as described below.
lPhenomenon: Find a trouble phenomenon in this column. If there are multiple
phenomena, take all the corresponding items into consideration.
This allows you to specify a hidden defective part.
lCause: Lists as many possible causes as possible. Guess a trouble cause out
of them and take its check method to specify the trouble cause.
lCheck Method: Describes a check method to specify a trouble cause.
lRemedy: Troubleshoot by taking a remedy described in this column.
By troubleshooting in accordance with the above-mentioned procedure, you can troubleshoot ef-
ficiently with fewer misjudgments.
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Phenomenon Cause Check Method Remedy
The AC adapter is not
connected. Connect the specified AC adapter.
Check whether any un-
specified power has
been used so far.
Use the specified AC
adapter.
No power
(POWER lamp not
illuminated) The fuse is gone.
Check whether the
specified fuse is used. Use the specified fuse.
The control PCB assy is
defective. Replace the control PCB assy.
The fuse immedi-
ately goes again
after replacing with
new one. The circuit drive power
is abnormal. With a DC voltmeter, measure the circuit
drive voltage.
Replace the control PCB
assy.
TIf the fuse is gone with the specified AC voltage supplied to the AC adapter, it is likely that the
thermal head unit or control PCB assy is defective. Replace either defective one. Incidentally,
check the wiring of the drawer and interface cable.

CBM1000 Service Manual
– 20 – CITIZEN
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Phenomenon Cause Check Method Remedy
Faulty DC output volt-
age from the AC
adapter
Check whether the
specified AC adapter is
used.
Use the specified AC
adapter.
Faulty control PCB assy Replace the control PCB
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.
No printing
Faulty thermal head Replace the thermal
head.
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.
Partly not printed
Faulty thermal head Replace the thermal
head.
Faulty DC output volt-
age 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 head Replace the thermal
head.
Foreign substance is
adhered to the thermal
head.
Check whether any for-
eign substances are
adhered to the thermal
head.
Dip a cotton swab or
soft cloth in ethyl alco-
hol and wipe the foreign
substances with them.
Non-recommended pa-
per is used. Check whether the pa- per being used meets
the specification.
Replace it with the
specified paper.
Faint printout or
uneven printout
Faulty mounting of the
platen roller Check mounting condi- tion of the platen roller. Mount the platen roller properly.