CAB PXQ Series User manual

Service Manual
PX Q
MADE IN GERMANY
Print Module

2 2
Service Manual
for the following products
Family Type
Print Module PX Q PX Q4L
PX Q4R
PX Q4.3L
PX Q4.3R
PX Q6.3L
PX Q6.3R
Edition: 07/2020 - Part No. 9003595
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
Windows is a registered trademark of the Microsoft Corporation.
Editor
Regarding questions or comments please contact cab Produkttechnik GmbH & Co. KG.
Topicality
Due to the constant further development of our products discrepancies between documentation and product can occur.
Please check www.cab.de for the latest update.
Terms and conditions
Deliveries and performances are effected under the General conditions of sale of cab.
Germany
cab Produkttechnik GmbH & Co KG
Karlsruhe
Phone [phone]
www.cab.de
USA
cab Technology, Inc.
Chelmsford, MA
Phone [phone]
www.cab.de/us
Taiwan
cab Technology Co., Ltd.
Taipei
Phone [phone]
www.cab.de/tw
China
cab (Shanghai) Trading Co., Ltd.
Guangzhou
Phone [phone]
www.cab.de/cn
France
cab Technologies S.à.r.l.
Niedermodern
Phone [phone]
www.cab.de/fr
Mexico
cab Technology, Inc.
Juárez
Phone [phone]
www.cab.de/es
China
cab (Shanghai) Trading Co., Ltd.
Shanghai
Phone [phone]
www.cab.de/cn
South Africa
cab Technology (Pty) Ltd.
Randburg
Phone [phone]
www.cab.de/za

3
Table of Contents
1 Introduction............................................................................................................................................4
1.1 Instructions...............................................................................................................................................4
1.2 General Safety Instructions......................................................................................................................4
1.3 Protective Devices ...................................................................................................................................5
1.4 Handling Electricity ..................................................................................................................................5
1.5 Procedure in Case of Accidents ..............................................................................................................5
1.6 Environment.............................................................................................................................................5
2 Preparation.............................................................................................................................................6
2.1 Tools.........................................................................................................................................................6
2.2 Removing and Installing the Rear Cover .................................................................................................6
3 Maintenance ...........................................................................................................................................7
3.1 Cleaning by the Operator.........................................................................................................................7
3.2 Cleaning the Label Sensor.......................................................................................................................7
4 Replacing Assembly Units.................................................................................................................... 8
4.1 Replacing the Printhead...........................................................................................................................8
4.2 Replacing the Rollers and the Dispense Edge.......................................................................................10
4.3 Replacing the Slipping Clutches .............................................................................................................11
4.4 Replacing the Label Sensor...................................................................................................................13
4.5 Replacing the PCB CPU........................................................................................................................14
4.6 Replacing the Power Supply Unit...........................................................................................................15
5 Adjustments .........................................................................................................................................16
5.1 Measuring and Adjusting the Winding Torques......................................................................................16
5.1.1 Measuring the Winding Torques.......................................................................................................16
5.1.2 Adjusting the Winding Torques.........................................................................................................18
5.2 Adjusting the Printing Mechanism..........................................................................................................19
5.2.1 Preparing the Printer for Adjustment ................................................................................................19
5.2.2 Aligning the Printhead to the Print Roller..........................................................................................20
5.2.3 Adjusting the Printhead Pressure.....................................................................................................21
5.2.4 Adjusting the Distance of the Printhead from the Paper Guiding Edge............................................21
5.2.5 Adjusting the Transfer Ribbon Feed Path.........................................................................................22
5.2.6 Final Test..........................................................................................................................................22
5.3 Adjusting the Belt Tension at the Main Drive Motor ...............................................................................23
5.4 Adjusting the Head Switches .................................................................................................................24
5.5 Adjusting the Automatic Ribbon Saver...................................................................................................25
5.5.1 Setting the Eccentrics.......................................................................................................................25
5.5.2 Adjusting the Magnetic Clutch..........................................................................................................26
6 Troubleshooting and Error Treatment................................................................................................ 27
6.1 Failure of Device Functions....................................................................................................................27
6.2 Permanent Hardware Faults..................................................................................................................27
7 Block Diagram......................................................................................................................................28
8 Layout Diagram PCB CPU................................................................................................................... 29
9 Index......................................................................................................................................................30

4 4
1 Introduction
1.1 Instructions
Important information and instructions in this documentation are designated as follows:
Danger!
Draws attention to an exceptionally great, imminent danger to your health or life due to hazardous
voltages.
!
Danger!
Draws attention to a danger with high risk which, if not avoided, may result in death or serious injury.
!
Warning!
Draws attention to a danger with medium risk which, if not avoided, may result in death or serious injury.
!
Caution!
Draws attention to a danger with low risk which, if not avoided, may result in minor or moderate injury.
!
Attention!
Draws attention to potential risks of property damage or loss of quality.
i
Note!
Advices to make work routine easier or on important steps to be carried out.



Environment!
Gives you tips on protecting the environment.
Handling instruction
Reference to section, position, illustration number or document.
Option (accessories, peripheral equipment, special ttings).
Time Information in the display.
1.2 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.
N
Danger!
Double pole/neutral fusing.
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.
!
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.

5
1 Introduction
1.3 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.
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.
1.4 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.
1.5 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.
1.6 Environment



Obsolete assemblies contain valuable recyclable materials that should be sent for recycling.
Send to suitable collection points, separately from residual waste.
Send the parts for recycling.

6 6
2 Preparation
2.1 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 Part-No. 5540932)
• Distance caliber 0,1 mm (cab Part-No. 5961064)
Standard tools:
• Screw driver Torx, size TX 10
• Allen key 1,5 mm
• Allen key 2,5 mm (included)
• Phillips-head screwdriver, size 1
• Snap ring pliers ZGG 0
• Snap ring pliers ZGG 1
• Socket wrench 5
• Socket wrench 5,5
• Cylindrical dynamometer (spring scale), 0 - 10 N
• Digital circuit analyzer
2.2 Removing and Installing the Rear Cover
!
Attention!
The rear cover or cables can be damaged via careless handling.
Move cable out of the risk area.
Put cover into the guiding complete.
1
2
Figure 1 Removing and installing the rear cover
Removing the cover:
1. Loosen two screws (2).
2. Remove the cover (1) in the arrow direction.
Installing the cover:
1. Move cover (1) against the arrow direction to the device.
2. Make sure that all cables are out of the risk area at the edges of cover.
3. Move the cover (1) complete in the circumferential guiding.
4. Fix the cover (1) with the screws (2) and tighten the screws.

7
3 Maintenance
3.1 Cleaning by the Operator
The following cleaning work is described in the “Mounting Instructions“:
• Cleaning the device.
• Cleaning the printhead.
• Cleaning the print roller .
3.2 Cleaning the Label Sensor
31 2
34 5
Figure 2 Cleaning the label sensor
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.
1. Unplug the device from the electrical outlet and remove the rear cover.
2. Remove the material from the printer.
3. Disconnect the cable (4) from the connector (5) of the label sensor (3) .
4. Loosen the screw (2) with the Allen key (1).
5. Push the label sensor (3) in the arrow direction and remove it to the backside
6. Clean the label sensor and the sensor units (3) with brush or cotton swab soaked in pure alcohol.
7. Move label sensor (3) against the arrow direction in the former position.
8. Connect the cable (4) to the connector (5) .
9. Mount the rear cover and restore all connections.
10.Adjust the label sensor Mounting Instructions.
11. Tighten the screw (2) .

8 8
4 Replacing Assembly Units
4.1 Replacing the Printhead
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.
1
2
3
4
3
4
5
1 Data connector
2 Power connector
3 Threaded holes
4 Catching holes
5 Heating line
Figure 3 Structure of the printhead
!
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 (1, 2).
Do not touch heating line (5) with hard objects or your hands.

9
4 Replacing Assembly Units
66
7 8
33
4499
Figure 4 Replacing the printhead
Dismounting the Printhead
1. Remove the media from the printer.
2. Lock the printhead.
3. Loosen two screws (6).
4. Open the printhead locking and if necessary remove the printhead from the pins (9).
5. First unplug the power cable (8), followed by the data cable (7).
Mounting the Printhead
1. First connect the data cable (7), followed by the power cable (8).
2. Place the printhead into the printhead assembly and insert the pins (9) into the holes (4).
3. Press down the printhead carriage and x the printhead with the screws (6) at the carriage using the threaded
holes (3).
4. Clean the heating line with the cleaning cloth included in the contents of delivery.
5. Reload labels and transfer ribbon.

10 10
4 Replacing Assembly Units
4.2 Replacing the Rollers and the Dispense Edge
7c4 5 7a 8 7b 9 9 9 101010
1 2 3
611 11 11
Figure 5 Replacing the rollers and the dispense edge
1. Unlock the levers (1,3) to lift the printhead and the pinch roller. Open the locking system (8) and swing it down.
2. Loosen the screws (11) and the washers (10) and remove the ball bearings (9) from the bearing plate (2).
3. Pull out the rollers (7) and/or the dispense edge (6).
4. Insert new rollers (7) and push them onto the hexagonal ends of the concerning axles (5) while turning slightly.
5. Insert the dispense edge (6) through the bearing plate (2) into the notch (4).
6. Insert the ball bearings (9) into the bearing plate (2) and secure them with the screws (11) and the washers (10).