Service History — Columbia, SC — Page 3

Problem: Lexmark CX331 reported intermittent paper jams, creasing during feeding, and false empty-tray errors despite paper being loaded.

Solution: Technician cleaned the feed tires, registration rollers, and pickup components, then ran a 50-page test to confirm consistent, jam-free paper feed.

Problem: Zebra 220xi4 wide-format thermal printer producing half-width labels; ribbons installed were approximately 12 inches wide for an 8-inch media path and wound in the wrong direction.

Solution: Technician identified incorrect ribbon width and orientation as the root cause. Correct high-resin ribbon stock was required before full diagnostics could be completed. Parts identified for the repair included a media guide plate, ribbon strip plate with static brush, and an extra toggle assembly.

Problem: A Lexmark MS821 laser printer in Columbia, SC experienced recurring printhead errors that interrupted operation multiple times per week; reboots provided only temporary relief.

Solution: The technician cleaned the printer's metal contact points using an eraser and isopropyl alcohol, then cleared dust from the surrounding connections, resolving the intermittent error and returning the unit to consistent operation.

Problem: HP LaserJet M602 reported jamming and inconsistent paper feeding, with a horizontal void appearing across consecutive pages.

Solution: Diagnosed horizontal void as a transfer roller issue. Cleaned the machine, installed a customer-supplied fuser maintenance kit, replaced feed rollers, and tested print output. Advised that the Tray 3 cassette unit (CE998A) should be replaced if feed issues recur.

Problem: Lexmark CS725de in West Columbia, SC reporting errors on the color imaging kit and transfer module.

Solution: Replaced the color imaging kit (74C0Z50), black imaging unit (74C0Z10), and image transfer unit (40X9929) to clear imaging and transfer module errors.

Problem: Canon MF743CDW laser printer in Cayce, SC presented with recurring paper jams requiring diagnostic evaluation and parts assessment.

Solution: Technician diagnosed the MF743CDW (fuser assembly as root cause) and replaced fuser assembly RM2-6418. Unit was tested post-repair and returned to normal operation.

Problem: HP LaserJet M632 displayed a persistent 49.38.0C firmware error, preventing the printer from completing its startup sequence after a prompted restart.

Solution: Technician formatted the hard drive and installed updated firmware on-site. Coordinated with the customer's IT team to restore network configuration. Device tested and returned to normal operation.

Problem: Sato CL4NX thermal printer producing ribbon wrinkles, affecting print quality at a Chapin, SC distribution center.

Solution: Cleaned the CL4NX (203 dpi), adjusted the label guide, and removed an overfilled used ribbon core. Identified a bent ribbon plate and worn platen roller as root causes. On a follow-up visit, replaced the platen roller (R37901501) and AJ ribbon plate (P52985001), restoring normal ribbon tracking and

Problem: Zebra 105SL Plus reported a media sensor calibration failure, preventing reliable media detection during print operations.

Solution: Replaced the media guide and manually adjusted the media sensor sensitivity setting. Calibration was verified through post-repair testing.

Problem: HP Color LaserJet M452DN reported a tray 2 jam error with no visible paper jam present in the tray.

Solution: Replaced the tray 2 pickup, feed, and separation rollers from a maintenance kit. Cleaned and tested the printer; jam error cleared and device returned to normal operation.

Problem: HP DesignJet T1200 plotter in Lugoff, SC persistently displayed error code 47:01 after each restart, with the carriage moving to home position then jumping.

Solution: On-site inspection revealed a broken gear on the Starwheel Motor housing. Technician also observed secondary errors 79:04 and 86:01 during reboots. Replaced the Starwheel Motor (Q6718-67017) and Starwheel Support Assembly left and right lifters (Q5669-67054). Unit tested and returned to working cond

Problem: Zebra ZT610 (300 dpi, ZT61043-T010100Z) in Orangeburg, SC due for scheduled quarterly preventive maintenance.

Solution: Technician performed full preventive maintenance on the Zebra ZT610 (300 dpi). Unit was cleaned throughout and tested; printer confirmed operational and ready for return to service.

Problem: HP LaserJet P4015 in Elgin, SC reported constant tray 2 paper jams during a scheduled preventive maintenance visit.

Solution: Found and removed torn paper lodged in the tray 2 registration assembly. Jam cleared; printer verified operational with no additional issues detected.

Problem: Zebra ZM400 thermal printer was due for scheduled quarterly preventive maintenance. Printhead wear was also flagged as a concern based on prior technician notes.

Solution: During follow-up, the printhead on the 203 dpi ZM400 was ordered and subsequently installed on a separate unit. The original ZM400 was removed from the production floor and repurposed as a spare, so PM service was not performed on this visit.

Problem: HP LaserJet 4350dtn reported frequent paper jams and toner not adhering to the page.

Solution: Swapped toner cartridge and fuser with a customer-supplied 4250 unit to isolate the fault. Cleaned the machine, then installed a Q5421A fuser maintenance kit on the 4350dtn and reset the page counter. Tested to confirm proper operation. A second Q5421A kit was left on-site as an emergency spare.

Problem: A Sato M10e thermal printer was brought in with a failed printhead requiring replacement.

Solution: Replaced the printhead on the Sato M10e, then cleaned the unit and performed a full functional test to confirm proper print quality and operation.

Problem: HP LaserJet MFP M830 presented with multiple issues, including a paper jam in the fuser assembly caused by a torn heat roller mylar sleeve.

Solution: Removed the defective fuser. A warranty replacement was processed with the vendor; the initial unit shipped was an incorrect HP LJ M606 fuser and was returned. The correct HP LJ M830 fuser was received, installed, cleaned, and tested to confirm proper operation.

Problem: HP LaserJet M806 reported producing unusual noise and leaving toner streaks on printed pages.

Solution: Technician reseated the toner cartridge and ran test prints. Rollers inspected and found in good condition. Print quality restored; root cause attributed to an improperly seated toner cartridge.

Problem: HP LaserJet 4250 producing consistent horizontal lines across printed pages.

Solution: Diagnosed horizontal banding as caused by a depleted toner cartridge. Replaced the toner cartridge, cleaned the printer, and confirmed clean output on test pages.

Problem: Sato thermal printers at a Lugoff, SC facility were due for scheduled weekly preventive maintenance.

Solution: Technician performed weekly preventive maintenance on the Sato thermal printer fleet per the established PM schedule.

Problem: A Zebra 170Xi3 Plus 300 dpi industrial thermal printer in Irmo, SC required platen roller replacement.

Solution: Technician installed a new platen roller (part G46278M), then cleaned and tested the printer to confirm proper operation.

Problem: HP DesignJet T790 (CR652A) presented with multiple issues: ink delivery failures, a broken carriage belt clip, and two printheads producing failed test patterns across both color channels.

Solution: Technician oiled the carriage rod, replaced two failed printheads, and identified third-party remanufactured inks as the root cause of ink system degradation. Customer switched to genuine HP inks, which resolved remaining issues and prevented further damage to the ink tube assembly.

Problem: Zebra GX430t thermal printer in Winnsboro, SC was due for scheduled preventive maintenance as part of an ongoing multi-unit PM program.

Solution: Technician performed preventive maintenance on the Zebra GX430t at 1,345,418 inches of use, including thorough cleaning and configuration of the unit.

Problem: A Camden, SC facility requested an on-site inventory and condition evaluation of their HP and Zebra thermal printer fleet across two buildings to determine repair needs, PM requirements, and recommended spare parts to stock.

Solution: The technician inventoried and evaluated all HP and Zebra thermal printers at the main building and an auxiliary automotive building. Two units were identified with active problems; repair quotes and compatible replacement pricing were prepared for the customer's review.

Problem: Multiple Sato thermal printers presented with concurrent issues at a West Columbia, SC facility, requiring a multi-trip service engagement.

Solution: Replaced two printheads, replaced gap sensor, performed deep cleaning, corrected an inverted output assembly by installing missing screws, and repaired additional components using available parts stock. Work completed across three on-site visits totaling ten hours.

Problem: Zebra ZT410 (203 dpi) reported rollers dislodging during operation due to a missing retaining screw, causing unreliable media handling.

Solution: Technician inspected the ZT410, then replaced the printhead (P1058930-009), platen roller (P1058930-080), and fully worn peel assembly (P1058930-098). Missing screw was addressed, machine cleaned, and unit tested and returned to service.

Problem: Lexmark MS821n laser printer in Camden, SC reported as not pulling paper from the tray.

Solution: On-site diagnosis confirmed no mechanical feed fault. Root cause was a paper size/type mismatch between the print driver, applications, and printer settings. IT staff were advised to align Universal or Letter size consistently across software and hardware configurations.

Problem: Zebra ZT220 thermal label printer producing light, faded print on labels.

Solution: Adjusted darkness setting to 30 after printhead cleaning and pressure adjustment failed to resolve faded output. Printhead assessed as near end of life; 203 DPI printhead replacement quoted but deferred by the customer pending a planned equipment upgrade.

Problem: Lexmark XS734de producing marks along the sides of printed pages, with occasional page creasing also reported.

Solution: Replaced the photo conductor unit from customer stock to address print quality defects. Inspection revealed the fuser (115V, 40X5093) and transfer belt (40X5096) at 20% remaining life on a 10-year-old unit; waste toner box (C734X77G) also noted. Customer declined further repairs after reviewing the

Problem: Zebra GX430t thermal label printer due for scheduled preventive maintenance (visit 4 of 5 in service cycle).

Solution: Performed scheduled PM on Zebra GX430t at 1,322,799 inches of use. Cleaned internal components and verified printer configuration to manufacturer specifications.

Problem: Customer in West Columbia, SC required three new Zebra ZT411 thermal printers to expand or replace existing print operations.

Solution: Three Zebra ZT411 thermal printers were sourced and ordered new, with units shipped directly to the customer's location.

Problem: HP Color LaserJet M477 in Lexington, SC presented with ADF failure — the feeder motor activated but no paper movement occurred, returning the printer to ready state. Tray 1 and Tray 2 rollers were also worn smooth.

Solution: Technician diagnosed a failed ADF assembly and slick pickup rollers in both trays. Repair quote issued for ADF whole assembly (CF377-60104), Tray 1 pickup roller (RL1-2593), Tray 1 separation pad (RM2-6406), Tray 2 pickup roller (RM2-5576), Tray 2 separation roller (RM2-5881), and Tray 2 feed roller

Problem: HP LaserJet M806 reached 'Ready' status but would not accept print jobs from the customer's network environment.

Solution: Technician tested the internal mini switch and network port — both confirmed functional. Printing via the web portal succeeded, isolating the fault to the AS400 system configuration rather than the printer hardware.

Problem: Zebra ZD620 thermal printer presented with a broken top cover left latch and damaged media holder, rendering the unit non-operational.

Solution: Unit was decommissioned as a parts source. Technician stripped the top cover left latch assembly, cutter, control panel, and platen roller for parts recovery.

Problem: HP LaserJet M4345 MFP reported scanner malfunction. Unit was also missing the output bin, delivery assembly, and Tray 2 cassette, with worn feed components throughout.

Solution: Technician found the scanner assembly manually locked; unlocking it restored full scanner function. Replaced Tray 2 pickup roller (RM1-0036), two Tray 2 separation rollers (RM1-0037), ADF pickup roller assembly, ADF separation pad, output bin (RM1-0940), delivery assembly (RM1-1047), Tray 2 cassette

Problem: Zebra ZT410 thermal label printer in a transportation office was producing loud noise during operation.

Solution: Inspection revealed heavy adhesive buildup along the label path. Technician cleaned residual adhesive from all label path surfaces; friction-caused noise ceased after cleaning.

Problem: Zebra 105SL thermal printer presented with a damaged platen roller showing cuts and a missing printhead, requiring scheduled PM service.

Solution: Replaced the cut platen roller and installed a new printhead. Adjusted the take-label sensors and tested the unit to confirm proper operation.

Problem: HP Color LaserJet MFP M277dw brought in with reported multiple issues; upon inspection, no mechanical or print-quality defects were found.

Solution: Performed full cleaning of scanner glass and paper feed rollers on HP CLJ MFP M277dw. Tested all functions; device operating within normal parameters.

Problem: HP Color LaserJet MFP M577dnm reported leaving smudges on printed output.

Solution: Technician diagnosed the root cause as a failing ITU (transfer belt B5L24-67901), tray 2 pickup roller assembly RM2-0062, and tray 2 separation roller assembly RM2-0064. The initially shipped toner cartridge was not required. All three replacement parts were ordered for installation.

Problem: HP LaserJet MFP M521dn ADF would not pick up paper, leaving the document feeder unresponsive.

Solution: Inspected ADF connectors and cleaned the unit. Replaced tray 2 roller (RM1-6323), tray 2 separation pad (RM1-6303), and ADF (A8P79-65014). First replacement ADF misfed and jammed; second arrived with a torn ribbon. Third ADF unit installed and tested fully operational.

Problem: Zebra ZT230 in Elgin, SC displayed a persistent ribbon error message despite being configured for direct thermal printing, which requires no ribbon.

Solution: Identified that the ZT230's print mode had been set incorrectly to thermal transfer. Switched the configuration back to direct thermal mode and tested the unit to confirm the ribbon error cleared.

Problem: A legacy Zebra 140xi2 industrial thermal printer, several generations old and predating USB/Ethernet connectivity, was evaluated during a scheduled PM cycle.

Solution: Unit was designated a parts printer. Usable components were stripped and used to complete repairs on two Zebra 140xi3 printers. Remaining hardware retained for future PM and service support on the 140xi series.

Problem: A fleet of Sato thermal printers at an Orangeburg, SC facility required scheduled weekly preventive maintenance service.

Solution: Technician performed weekly preventive maintenance on the Sato thermal printer fleet per established PM schedule, servicing each unit to manufacturer standards.

Problem: HP LaserJet Pro M401DNE reported smearing on printed output.

Solution: Inspection revealed fuser ghosting with a worn roller and pad, and a dry, rough transfer roller. Given the extent of component wear, the customer elected to replace the unit rather than perform maintenance kit service.

Problem: Zebra 105SL thermal label printer in Orangeburg, SC was due for scheduled quarterly preventive maintenance.

Solution: Technician performed quarterly PM: inspected print quality, cleared internal dust buildup, and verified all drive mechanisms — all components operating within spec.

Problem: Zebra 105SL Plus (PM 32) presented requiring a media sensor replacement and a 300 DPI printhead replacement.

Solution: Installed a new 300 DPI printhead and media sensor kit on the Zebra 105SL Plus. Cleaned the unit thoroughly and tested to confirm proper operation.

Problem: Lexmark MB2650adwe displaying a Maintenance Kit Low message, indicating end-of-life wear on internal feed and fusing components.

Solution: Installed a full maintenance kit on the Lexmark MB2650adwe, replacing the fuser, tray 1 pick tires, tray 1 separation roller assembly, transfer roller, and MP tray pickup roller and separation pad. Sourced serviceable used pick tires for tray 2, cleaned the tray 2 separation roller assembly, and cle

Problem: Zebra GX430t thermal label printer in Newberry, SC was due for scheduled preventive maintenance as part of an ongoing multi-unit service plan.

Solution: Technician performed full preventive maintenance on the Zebra GX430t at 68,995 inches of use, including cleaning internal components and reconfiguring printer settings to manufacturer specifications.

Problem: An HP LaserJet Enterprise M609x was cutting off the top of barcodes when printing on 3-part paper.

Solution: Print speed was reduced to prevent multi-part sheets from sticking together. Template border sizing was flagged for IT correction. Print darkness was increased per customer request. On a follow-up visit, a J8J87A maintenance kit was installed to address roller wear contributing to paper sticking fro

Problem: HP Color LaserJet Flow MFP M880 presented with intermittent scan failures, ADF paper jams during scanning, undelivered scan-to-email jobs, and a fuser kit below 10% remaining life.

Solution: Replaced ADF roller kit, MP tray roller kit, fuser kit, and hard drive. Configured printer post-repair and tested all functions including scan-to-email delivery.