CAB A Series User manual

Service Manual
A+The Premium Class.
Label Printer

2 2
Family Type
A+ A2+
A4+
A4.3+
A6+
A8+
A4+M
Edition: 6/2008 - Part No. 9008508
Copyright
This documentation as well as translation hereof are property of
cab Produkttechnik GmbH & Co. KG.
The replication, conversion, duplication or divulgement of the
whole manual or parts of it for other intentions than its original
intended purpose demand the previous written authorization by
cab.
Trademark
Centronics®is a registered trademark of the Data Computer
Corporation.
Microsoft®is a registered trademark of the Microsoft Corporation.
Windows 2000®, 2003®, XP®are registered trademarks of the
Microsoft Corporation.
TrueTypeTM is a registered trademark of Apple Computer, Inc.
Editor
Regarding questions or comments please contact cab Produkt-
technik GmbH & Co. KG.
Topicality
Due to the constant further development of our products discrep-
ancies between documentation and product can occur.
Please check www.cabgmbh.com for the latest update.
Terms and conditions
Deliveries and performances are effected under the General
conditions of sale of cab.
Service Manual
for the following products
Germany
cab Produkttechnik
GmbH & Co KG
Postfach 1904
D-76007 Karlsruhe
Wilhelm-Schickard-Str. 14
D-76131 Karlsruhe
Telefon [phone]
Telefax [phone]
www.cab.de
[email protected]
France
cab technologies s.a.r.l.
Z.A. Nord du Val de Moder
F-67350 Niedermodern
Téléphone [phone]
www.cab-technologies.fr
[email protected]
USA
cab Technology Inc.
90 Progress Avenue Unit #2
Tyngsboro MA, 01879
Phone [phone]
www.cabtechn.com
[email protected]
Asia   

cab Technology Co, Ltd.
󰛥󰋅󰉸
󰄞󰄞󰄞
19F-1, No. 33, Sec. 1,
Min Sheng Road
Panchiao 220,
Taipei, Taiwan, R.O.C.
Phone [phone]
󰀄www.cabasia.net
[email protected]
Other subsidiaries on request.

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Table of Contents
1 Important Information............................................................................................................................4
1.1 General Safety Instructions......................................................................................................................4
1.2 Protective Devices ...................................................................................................................................4
1.3 Handling Electricity ..................................................................................................................................5
1.4 Procedure in Case of Accidents ..............................................................................................................5
2 Cleaning..................................................................................................................................................6
2.1 Cleaning by the Operator.........................................................................................................................6
2.2 Cleaning the Label Sensor A6+,A8+.......................................................................................................6
2.3 Cleaning the Label Sensor A4+M ............................................................................................................7
3 Replacing Assembly Units.................................................................................................................... 8
3.1 Tools.........................................................................................................................................................8
3.2 Removing and Installing the Plastic Cover...............................................................................................8
3.3 Replacing the Printhead...........................................................................................................................9
3.3.1 Replacing the Printhead A2+, A4+, A4.3+, A4+M ..............................................................................9
3.3.2 Replacing the Printhead A6+,A8+....................................................................................................10
3.4 Replacing the Print Roller and Rewind Assist Roller..............................................................................12
3.5 Replacing the Slipping Clutches ............................................................................................................13
3.6 Replacing the Label Sensor...................................................................................................................15
3.6.1 Replacing Standard Label Sensor A+ ..............................................................................................15
3.6.2 Replacing Label Sensor A4+M.........................................................................................................16
3.7 Replacing the PCB CPU........................................................................................................................17
3.8 Replacing the Power Supply Unit...........................................................................................................18
4 Adjustments .........................................................................................................................................19
4.1 Measuring and Adjusting the Winding Torques......................................................................................19
4.1.1 Measuring the Winding Torques.......................................................................................................19
4.1.2 Adjusting the Winding Torques.........................................................................................................22
4.2 Adjusting the Printing Mechanism..........................................................................................................23
4.2.1 Preparing the Printer for Adjustment ................................................................................................23
4.2.2 Adjusting the Printhead Position.......................................................................................................24
4.2.3 Adjusting the Printhead Pressure.....................................................................................................25
4.2.4 Adjusting the Transfer Ribbon Feed Path.........................................................................................26
4.2.5 Final Test..........................................................................................................................................26
4.3 Adjusting the Belt Tension at the Main Drive Motor ...............................................................................27
4.4 Adjusting the Head Switch.....................................................................................................................28
5 Troubleshooting and Error Treatment................................................................................................ 29
5.1 Failure of Device Functions....................................................................................................................29
5.2 Hardware Faults.....................................................................................................................................30
6 Block Diagram......................................................................................................................................31
7 Layout Diagram PCB CPU...................................................................................................................32
8 Index......................................................................................................................................................34

4 4
1 Important Information
1.1 General Safety Instructions
This service manual is intended for use by qualied service and maintenance personnel. For more operation and
conguration information, refer to the user or conguration manual.
Follow the general safety rules below:
Keep the area around the device clean at all times!
Work with safety in mind.
Parts of device that are removed during the maintenance work must be put in a safe place.
Avoid risks of tripping over.
Danger!
Danger to life and limb from increased current ow through metal parts in contact with the device.
Do not wear clothing with metal parts.
Do not wear jewelry.
Do not wear spectacles with metal frames.
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!
Warning!
Items of clothing drawn into the device by moving parts can lead to injuries.
Do not wear any items of clothing which could get caught by moving parts.
1.2 Protective Devices
!
Warning!
There is a risk of injury if protective devices are missing or defective.
Replace all protective devices (covers, safety notices, grounding cables etc) after maintenance work
has been completed.
Replace parts that have become defective or unusable.
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
Wear protective goggles for:
Knocking pins or similar parts in or out with a hammer.
Using spring hooks.
Inserting or removing springs, retaining rings or grip rings.
Using solvents, cleansers or other chemicals.
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1 Important Information
1.3 Handling Electricity
The following work may only be done by trained and qualied electricians:
Work on electrical components.
Work on an open device still connected to the mains supply.
General precautions before starting maintenance work:
Find out where the emergency and power switches are so that they can be quickly thrown in an emergency.
Disconnect the current supply before carrying out the following work:
Installing or removing power units.
Working in the immediate vicinity of open power supply components.
Mechanical check of power supply components.
Modifying circuits in the device.
Test the zero potential of the device parts.
Check the working area for possible sources of danger, such as wet oors, defective extension cables, defective
protective conductor connections.
Additional precautions in the case of exposed voltages:
Ask a second person to remain near the working site. This person must know where the emergency and power
switches are, and how to switch the current off if danger arises.
Only use one hand to work on electric circuits of devices that are switched on. Keep the other hand behind your
back or in your pocket.
This prevents electricity from owing through your own body.
1.4 Procedure in Case of Accidents
Act calmly and with great care.
Avoid danger to yourself.
Switch off power.
Request medical assistance.
Give rst aid, if necessary.
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2 Cleaning
2.1 Cleaning by the Operator
The following cleaning work is described in the “Operator's Manual“:
cleaning the device
cleaning the printhead
cleaning the print roller
cleaning the label sensor A2+ A4+
2.2 Cleaning the Label Sensor A6+, A8+
2 1
3
5
7
6
4
Fig. 1 Cleaning the label sensor A6+, A8+
Danger!
Risk of death via electric shock!
Before opening the housing cover, disconnect the device from the mains supply and wait at lease one
minute until the power supply unit has discharged.

Remove media from the printer.
Remove the Allen key (7) from its retainer.
Remove the rear cover of the printer.
Slide the label sensor assembly onto the tab (5) toward the rear cover until it stops.
Unplug the cable (2) from the plug on the rear end of the label sensor (1).
Press the latch (6) and slowly pull label sensor outward via the tab (5). That way the distance plate (3) is pushed
out of label sensor guide.
Clean label sensor and sensor units (4) with brush or cotton swab soaked in pure alcohol.
Push label sensor back via tab (5) .
Press the latch (6) and push the distance plate (3) into the guide of the label sensor.
Connect the cable (2) to the label sensor (1).
Pull the label sensor (1) via the tab (5) as far as possible toward the cover side.
This prevents the cable (2) from being pinched when installing the rear cover.
Install the rear cover of the printer.
Insert the Allen key (7) into its retainer.
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8.
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11.
12.
13.

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2.3 Cleaning the Label Sensor A4+M
1
5
2
423
Fig. 2 Cleaning the label sensor A4+M
Danger!
Risk of death via electric shock!
Before opening the housing cover, disconnect the device from the mains supply and wait at lease one
minute until the power supply unit has discharged.

Remove media from the printer.
Remove the Allen key (5) from its retainer.
Remove the rear cover of the printer.
Unscrew knurled thumb screw (1).
Unplug the cable (3) from the plug on the rear end of the label sensor (2).
Push the label sensor (2) so deep as possible into the guide prole toward the chassis.
Slide out the label sensor assembly (2) toward the back side cover.
Clean label sensor and sensor units (2) with brush or cotton swab soaked in pure alcohol.
Push label sensor back toward the print head side of printer so you can see the hole in the label sensor over the
long hole in the prole (guide).
Connect the cable (3) to the label sensor (2).
Attach knurled thumb screw (1).
Pull the label sensor (2) via knurled thumb screw (1) so far as possible toward cover side. This prevents the cable
(3) from being pinched when installing the rear cover.
Install the rear cover of the printer.
Adjust label sensor  operators manual a4+M.
Insert the Allen key (5) into its retainer.
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2.
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11.
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14.
15.
2 Cleaning

8 8
3 Replacing Assembly Units
3.1 Tools
Do not use any worn of damaged tools.
Only use tools and testing devices that are suitable for the task at hand.
cab special tools:
Test collar for transfer ribbon winder (cab item number: 5534199)
Standard tools:
Phillips-head screwdriver, size 1
Allen key 1,5 mm
Screw driver Torx, size TX 20
Snap ring pliers ZGG 0
Cylindrical dynamometer (spring scale), 0 - 10 N
Cylindrical dynamometer (spring scale), 0 - 25 N
Jaw wrench 8 mm
3.2 Removing and Installing the Plastic Cover
!
Attention!
The plastic cover can be damaged via careless handling.
Do not use force.
Do not twist the plastic cover when removing it or pressing it on.
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Fig. 3 Removing and installing the plastic cover
Removing the plastic cover :
Swivel the plastic cover up 90° and hold it in this position with both hands.
Carefully pull the hinges of the plastic cover out of the front mount and then the rear mount.
Put the plastic cover in a safe place.
Installing the plastic cover :
Place the hinges of the plastic cover onto the mounts with the open side downward.
First carefully press the rear hinge onto the respective mount and then do the same with the front hinge.
Swivel the plastic cover closed.
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3 Replacing Assembly Units
3.3 Replacing the Printhead
3.3.1 Replacing the Printhead A2+, A4+, A4.3+, A4+M
The printhead of the label printer can be replaced without the need for ne adjustment. The printhead must be
replaced if worn or when switching to a printhead with higher or lower resolution. For better differentiation, the print
heads have a label stating the printer type and resolution.
12
3
4
6
7
4
6
5
1 Head plate
2 Plug connection
3 Plug connection
4 Screw
5 Printing line
6 Pins
7 Printhead
Fig.4 Structure of the printhead A2+, A4+, A4.3+, A4+M
!
Attention!
The printhead (7) is adjusted on a head plate (1) and precisely aligned at the factory. Do not loosen the
screws (4) under any circumstances.
!
Attention!
The printhead can be damaged by static electricity discharges and impacts!
Set up printer on a grounded, conductive surface.
Ground your body, e.g. by wearing a grounded wristband.
Do not touch contacts on the plug connections (2, 3).
Do not touch printing line (5) with hard objects or your hands.
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89
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11
3
6
6
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1
4
74
Fig. 5 Removing and installing the printhead A2+, A4+, A4.3+, A4+M

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3 Replacing Assembly Units
Removing the printhead
Turn lever (10) counterclockwise to lift the printhead.
Remove labels and transfer ribbon from the printer.
Remove Allen key (11) from its retainer.
Lightly keep printhead mounting bracket (9) on the print roller with one nger and screw out screw (8) with the
Allen key and remove it and the washer.
Swivel printhead mounting bracket (9) upward.
Remove printhead from the printhead mounting bracket (9) if necessary.
Loosen both plug connections (2, 3) on the printhead and set printhead down on a clean, soft surface.
Installing the printhead
Attach plug connections (2, 3).
Position printhead in printhead mounting bracket (9) in such a way that the pins (6) are secured in the corre-
sponding holes in the printhead mounting bracket (9).
Lightly keep printhead mounting bracket (9) on the print roller with one nger and check for correct positioning of
the printhead mounting bracket (9).
Screw in screw (8) with washer with the Allen key and tighten it.
Reload labels and transfer ribbon.
3.3.2 Replacing the Printhead A6+, A8+
1
2
3
5
4
4
1 Printhead
2 Plug connection
3 Plug connection
4 Threaded hole
5 Printing line
Fig. 6 Structure of the printhead A6+, A8+
!
Attention!
The printhead can be damaged by static electricity discharges and impacts!
Set up printer on a grounded, conductive surface.
Ground your body, e.g. by wearing a grounded wristband.
Do not touch contacts on the plug connections (2, 3).
Do not touch printing line (5) with hard objects or your hands.
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