2Removing the Printhead Turn the power switch off and disconnect both the power cord and printer communications cable.Open Cover.Remove media and ribbon (if applicable).Unscrew Printhead mounting screw with flat-head screwdriver.
3Removing the printhead 1. Open Printhead LeverPrinthead Lever*Make sure you are appropriately grounded using proper anti-static procedures.Removing the printhead
4Right Printhead Assembly Cable 1. Holding the Printhead, carefully disconnect the left Printhead Assemblycable, then the right Printhead Assembly cable from the back of the Printhead.2. Remove the Printhead.Right Printhead Assembly CableLeft PrintheadAssembly Cable
5Installing the Printhead Turn the power switch off and disconnect both the power cord and the printer communications cable.Open the side cover.
6Right Printhead Assembly Cable Left Printhead Assembly Cable Carefully position the new Printhead under the Printhead mounting bracket and connect both Printhead cables into the appropriate ports.Right Printhead Assembly CableLeft Printhead Assembly Cable
7Alignment Posts on Mounting Bracket Position the alignment slots in the new Printhead with the alignment posts on the bottom of the mounting bracket. You should hear a “clicking sound” which signifies that the Printhead is securely in place. Tuck the Printhead cables behind the Printhead.Alignment Posts on Mounting BracketAlignment slotsIn Printhead
8Clean the Printhead using an alcohol swab, removing dirt or oil that may havebeen deposited during installation.Alcohol swabPrint line
10Printhead Mounting Screw Lower the Printhead Assembly.Close the Printhead lever and check for proper alignment.Close the side cover.Connect the power cord and printer communications cable.Turn power on.Printhead Mounting ScrewIf the print line is not parallel with the platen roller, check that the Printhead Assembly guides fit snug into the Printhead slots.
11Printhead Position Adjustment Loosen the four top screws, found at the rear of the Printhead Assembly (do not remove).If print is lighter toward one side of the label and Printhead has been correctly installed, perform the Printhead Position Adjustment.Top screwsPrinthead Position Adjustment
121. Adjust the two gold hex nuts found at the rear of the Printhead Assembly (as viewed from the rear of the Printer). Adjusting the gold hex nuts clockwise will move the Printhead toward the back. Making 1/8 turns will have a noticeable affect in the print quality.2. Adjust the hex nut on the same side as the lighter print. Adjust in one direction, printing a test label after each adjustment. If print begins to darken, continue until desired darkness is achieved. If print becomes lighter, adjust the hex nut the opposite direction until desired print darkness is reached.Gold hex nuts
13Toggle Position Adjustment Locking nutLoosen locking nut so the toggle can slide freely.Position the toggle so it distributes evenpressure across entire label.Upper knurled nutAdjusting nutThreads showing underneath the Adjusting nut
14Printhead Pressure Adjustment Too much pressure applied to the toggles will shorten the life of the Printhead. Choose the lowest pressure that produces the desired print quality, maximizing Printhead life.Printhead Pressure AdjustmentPrint several test labels at 2 ips by pressing SETUP/EXIT, scroll until Print Speed is displayed and select 2 ips.During the test printing, use the LCD panel to lower the darkness setting until the labels print gray instead of black.3. On the toggle assembly, loosen the Upper knurled nut found above the adjusting nut.4. Looking down at the printer, use the adjusting nut to increase (clockwise) or decrease (counter-clockwise) pressure until darkness is uniform across label.5. Once uniformity is achieved, adjust the darkness level on the LCD until printing is clear.6. Tighten the Upper knurled nut against the Adjusting nut.
15Perform this adjustment to help achieve even pressure Wear Plate AdjustmentWear Plate AdjustmentRun several test labels at 2 ips.During label testing, use the LCD panel to lower the darkness setting until the labels print gray instead of black.Use a 7/64 hex wrench to loosen the two hex nuts attached to wear plate.Perform this adjustment to help achieve even pressureSilver Adjustment KnobWear PlateTwo hex nuts
16Silver Adjustment Knob For even pressure across width of label, adjust the Silver Adjustment Knob with your hand or with a 7/16 wrench.Turning the Silver Adjustment Knob clockwise will increase pressure on the left side of label (as viewed from front of printer). Adjusting it counter-clockwise will increase pressure on right side of label.When gray print is even across label, tighten the two hex nuts to secure wear plate in place.On the LCD, increase darkness setting to achieve desired print quality.Silver Adjustment KnobWear PlateTwo hex nuts
17Calibrating the Darkness After the printer is turned on and self power test is completed, press the SETUP/EXIT button.If the LCD does not display DARKNESS, scroll forward or backward using the INCREMENT buttons (+ or -).Once DARKNESS is displayed on the LCD, press the INCREMENT buttons to increase or decrease the DARKNESS value.After printing a successful label at the desired darkness level, press the SETUP/EXIT button twice to save the changes and exit the setup mode.
18Zebra is a registered trademark of ZIH Corp Zebra is a registered trademark of ZIH Corp. All other trademarks are the property of their respective owners.(*) Contents Subject to Change Without Notice Doc. No. Z105SL-Instructions_082405