Zebra 3742 Service Manual

980357-001 Rev. A©2001 Zebra Technologies Corporation272227423742DesktopThermal PrintersService Manual

ModelsThere are several models of the printer, each of which look similar but have different ribbon andmedia handling features.LP models print using d

ConventionsThis manual uses the following notations to call attention to important information.ICON / SYMBOL MEANINGWARNING - critical safety informat

Environmental and Shock ProtectionExtreme temperature and humidity fluctuations or mishandling can damage the printer and powersupply.Allow 30 minutes

CLEANING AND MAINTENANCEThe printers are manufactured and tested under a strict quality management program. ZebraTechnologies uses only high quality

Cleaning the Media PathKeep the inside of your printer clean as needed, by using a brush, vacuum or air blower along themedia path (except the print h

Cleaning the Print HeadOver time, the print head becomes contaminate resulting in poor print quality. After usingfive rolls of media or ribbon, rub t

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TROUBLESHOOTING GUIDEPROBLEMS SOLUTIONSStatus indicator doesnot light when powerswitch is on (I)1. Check power connections from the printer to the out

PROBLEMS SOLUTIONSPrinter appears to beworking with theindicator lightGREEN, but nothingis printed.1. Check the connections between the printer and th

PROBLEMS SOLUTIONSPrinter firmware mustbe updated.The printer firmware is updated by way of the parallel port.1. Use the download utility to send firm

Print Head LifeThe print head on the left is brand new. The print head in the center has been run over a millioninches and has been cleaned after eac

REQUIRED TOOLSMake use of the following tools while performing replacement procedures:•Phillips driver #0•Phillips driver #1•Phillips driver #2•Slot-h

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REPLACING PARTSTo access some parts, you need to dissemble other parts; therefore, other procedures must befollowed before and after performing a part

16 980357-001 Rev. A200PackingMaterials290PrintHead203RollHubs204Ribbon Take-Up Clutch205RibbonSupply Clutch202EnclosureLatch207MediaFrame201RubberFe

Packing Materials Replacement 980357-200ATo ship or store the printer, make sure all components are packed as shown.Move the printer carefully. While

Rubber Foot Replacement 980357-201ARemovalUse tweezers to pull the foot 1234 free ofthe bottom case.AssemblyPush the new foot into its receptacle !unt

Enclosure Latch Replacement 980357-202ARemovalUse a slotted screwdriver to push orneedle-nose pliers to pull the latch 12 free ofthe bottom case.Assem

Ribbon Roll Hub Replacement 980357-203ABoth the front and rear assemblies are on the left side of the carriage and are replaced with the samesteps.Pre

Ribbon Take-Up Clutch Replacement 980357-204APreparationsOpen the cover, then remove media and any ribbon from the printer.Removal1. Remove the retain

FOREWARDThis manual provides installation and operation information for the LP 2722, TLP 2722, LP 2742,TLP 2742 and TLP 3742 series printers, manufact

Ribbon Supply Clutch Replacement 980357-205ARemovalThe compression spring 3 has considerable force. Hold the assembly as you begin to remove it.1. Us

Front Bezel, Cutter Replacement 980357-206APreparationsProtect against static discharge. Your work area must be static-safe and includea properly grou

Media Frame Replacement 980357-207APreparationsProtect against static discharge. Your work area must be static-safe and includea properly grounded con

Label Taken Sensor Replacement 980357-208APreparationsProtect against static discharge. Your work area must be static-safe and includea properly groun

Feed Button/LED Replacement 980357-209APreparationsFollow the removal steps of the Media Frame Replacement procedure (980357-207).Removal1. Use a slot

Ribbon Out Sensor Replacement 980357-210APreparationsProtect against static discharge. Your work area must be static-safe and includea properly ground

Ribbon Out Sensor Replacement (continued) 980357-210AInstallation1. Insert the connector through the carriage from the top to the bottom. Route the r

Battery Replacement 980357-211APreparationsProtect against static discharge. Your work area must be static-safe and includea properly grounded conduct

Print Mechanism Replacement 980357-212APreparationsProtect against static discharge. Your work area must be static-safe and includea properly grounded

Print Mechanism Replacement (continued) 980357-212ARemoving the Mechanism1. Follow the removal steps of the Media Frame Replacement procedure (980357-

TRADEMARKSLP 2722, TLP 2722, LP 2742, TLP 2742 and TLP 3742 are of Zebra Technologies Corporation.Windows and MS-DOS are registered trademarks of Micr

Transmissive Gap Sensor Replacement 980357-213AThe sensor has two parts: one above and one below the media path.Preparations1. Do the removal steps o

Transmissive (Gap) Sensor Replacement (continued) 980357-213ARemoval of Bottom Sensor1. Use a #0 Phillips driver to remove thescrew 3 that holds the s

Black Line Sensor Replacement 980357-214APreparations1. Do the removal steps of the Label FrameReplacement procedure (980357-207).2. Do the removal st

Upgrades to Memory and Real Time Clock Option 980357-215AThese procedures outline the steps to access and replace SRAM memory, IE flash program memory

Upgrades to Memory and Real Time Clock Option - Continued 980357-215AAssembling the PrinterFollow the assembly steps of the Media Frame Replacement pr

Main Printed Circuit Board Assembly (PCBA) Replacement 980357-216APreparationsProtect against static discharge. Your work area must be static-safe and

Main Printed Circuit Board Assembly (PCBA) Replacement 980357-216AAssembling the Printer1. Perform the assembly steps of the PrintMechanism Replacemen

Platen Motor Replacement 980357-217APreparations1. Do the removal steps of the Media FrameReplacement procedure (980357-207).2. Do the removal steps o

Latch, Left Replacement 980357-218APreparations1. Do the removal steps of the Media FrameReplacement procedure (980357-207).2. Do the removal steps of

Latch, Left Replacement 980357-218AAssembly1. Turn the shaft " so that the flat of the end faces upward.2. Align the latch 3 so that the flat sid

Media Cautions & Tips1) Always use high quality, approved labels and tags. Approved suppliescan be ordered from your dealer. For the name of a dea

Latch, Right Replacement 980357-219APreparations1. Do the removal steps of the Media Frame Replacement procedure (980357-207).2. Do the removal steps

Latch, Right Replacement 980357-219AAssembly1. Turn the shaft $ so that the flat of the end faces upward.2. Align the latch 2 so that the flat side of

Platen Parts 980357-220AThe platen is not a field replaceable item.Accessing the platen would require you to first follow the removal steps of the Med

Print Head Replacement 980357-290APreparationsProtect against static discharge. Your work area must be static-safe and includea properly grounded cond

Print Head Replacement 980357-290ASwapping the Cables1. Follow the removalsteps of the MediaFrame Replacementprocedure (980357-207)2. Detach the topca

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CONTENTSINTRODUCTION 1Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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INTRODUCTIONIf you are a field engineer or technician, this manual helps you with routine maintenance,troubleshooting and procedures for replacing par