Service History — Gaithersburg, MD

Problem: Zebra 105SL Plus reported continuously feeding labels without stopping — a symptom consistent with an improper media load.

Solution: Inspection confirmed labels were not correctly threaded through the media path. Technician reloaded the label stock per proper routing specs; continuous feeding stopped and no further issues were found.

Problem: Zebra 220Xi4 industrial thermal printer producing intermittent diagonal voids in print output.

Solution: Technician identified a thick line and indentation on the installed ribbon roll. Three replacement rolls were inspected; one showed multiple void areas in the ink layer. A defect-free roll was loaded, and the pressure toggle and tear plate were adjusted to eliminate voids. Print driver settings were

Problem: Customer required a new HP LaserJet M404dn and an additional paper tray to expand print capacity at their Potomac, MD location.

Solution: Sourced and delivered a new HP LaserJet M404dn along with a compatible extra paper tray to the customer's facility.

Problem: HP LaserJet M402dne warehouse unit was due for its third scheduled preventive maintenance service, with feed rollers flagged for replacement.

Solution: Replaced tray 2 pickup roller assembly and tray 2 separation roller assembly. Technician sourced a compatible roller from an M501 separation roller assembly and fitted it into the existing M402 housing. Cleaned and tested printer to confirm reliable feed performance.

Problem: Datamax thermal printer printheads required replacement at a Potomac, MD facility.

Solution: Supplied two Datamax DMX I-4208 printheads (PHD20-2181-01-PB) and two Datamax H-4212/A-4212 Mark II 203dpi printheads (PHD20-2240-01-PB) as a parts-only order.

Problem: HP LaserJet M604 reported persistent paper jams originating from Tray 2. Investigation revealed folded paper in the tray cassette creating a bind during the lift cycle, compounded by worn pickup and feed rollers.

Solution: Cleared the jam, removed and correctly loaded the folded media, replaced the Tray 2 pickup roller and both Tray 2 feed rollers, then cleaned and tested the printer to confirm reliable paper feed.

Problem: Zebra GX430t thermal printer due for scheduled preventive maintenance (visit 7 of 9 in service cycle).

Solution: Performed full PM on Zebra GX430t at 103,375 inches of use. Cleaned internal components and verified configuration settings.

Problem: HP LaserJet 2430dtn experiencing paper jams at the output stage, with sheets consistently getting caught in one corner on exit.

Solution: Technician inspected the HP LaserJet 2430dtn and identified extensive wear throughout the paper path, including the fuser assembly (RM1-1535), fuser gear kit (K24XX), Tray 2 and 3 pickup rollers (RL1-0540 / RL1-0542), and Tray 2 and 3 separation pads (RM1-1298). Given the scope of required repairs,

Problem: HP LaserJet M404dn unable to connect to the network.

Solution: Diagnosed failed formatter board as the root cause. Ordered and installed a replacement formatter (W1A53-60001). Performed a follow-up visit to complete network configuration and verify full connectivity. Printer tested operational.

Problem: Zebra GX430t thermal printer was due for a scheduled preventive maintenance visit (4 of 6) in a McLean, VA facility.

Solution: Technician performed scheduled PM on the Zebra GX430t at 1,216,266 inches of use — cleaning internal components and reconfiguring the printer to manufacturer specifications.

Problem: Intermec PX6i thermal printer reported with degraded print quality requiring printhead adjustment or cleaning at 203 dpi.

Solution: Printhead inspected and found heavily coated with debris. Cleaned printhead, adjusted pressure arm and printhead pressure. On follow-up visit, installed replacement 203 dpi printhead (PX6C011000000020) and verified internal test prints. Tension adjustment documented for customer reference.

Problem: Arlington, VA facility required five Zebra ZT510 thermal printers (model ZT510-42T010000Z) to expand label printing capacity.

Solution: Sourced and procured five Zebra ZT510-42T010000Z thermal printers through an authorized distributor; units were delivered and received at the customer's facility.

Problem: HP LaserJet M608 was tearing pages during the print cycle, indicating worn feed roller components in Tray 2.

Solution: Replaced the Tray 2 Roller Kit on the HP LaserJet M608 (page count: 23,144) and tested feed operation to confirm clean, tear-free output.

Problem: Lexmark MS810 displaying 'Replace unsupported cartridge' error, preventing print operations.

Solution: Replaced the defective toner cartridge with a compatible replacement from stock. Cleaned the printer and verified full functionality through test prints.

Problem: A Zebra ZM400 industrial thermal printer at a Herndon, VA facility was due for scheduled preventive maintenance, including cleaning and print pressure calibration.

Solution: Performed PM service on the Zebra ZM400: cleaned internal components, adjusted print head pressure, and tested the unit — printer returned to specification.

Problem: Lexmark XM3250 multifunction laser printer required on-site setup and installation at a temporary location, including USB connectivity and wireless card configuration.

Solution: Connected the Lexmark XM3250 to the PC via USB and verified print functionality. Instructed the customer on installing the wireless card and entering network credentials at the permanent site. Scanning setup was deferred for remote configuration by IT upon relocation.

Problem: HP Color LaserJet Pro M452dn reported an unlocatable paper jam and a detached component.

Solution: Detached component identified as a fuser star roller — cosmetic loss with no functional impact. Paper jam located and cleared from the fuser assembly. Covers removed during access revealed the paper tray set to A4, causing feed timing errors and the jam. On power-up, a supply memory error appeared w

Problem: HP LaserJet Enterprise MFP M630 reported recurring ADF jams by multiple users.

Solution: Technician found tape debris lodged in the ADF rollers, removed the obstruction, cleaned the rollers, reset roller counts, and calibrated the scanner. ADF tested clear with no further jams.

Problem: Datamax I-4212e thermal label printer in Greenbelt, MD was due for scheduled preventive maintenance.

Solution: Performed PM service on Datamax I-4212e — cleaned internal components per standard PM #18 procedure to restore reliable print performance.

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

Solution: Technician performed scheduled preventive maintenance on the Zebra GX430t at 621,563 inches of media usage. Unit was cleaned and reconfigured to manufacturer specifications.

Problem: Zebra ZT410 thermal printer in Frederick, MD intermittently throwing a ribbon-out error despite ribbon being properly loaded.

Solution: Inspection revealed the printhead heavily coated in airborne oil from the production environment, contaminating the ribbon sensor. Replaced the ribbon sensor (P1058930-037) and main board (P1058930-402) to restore reliable operation.

Problem: HP LaserJet 9040 reported toner cartridges depleting within one to two days of installation, recurring jams at the fuser, and light/faded print output.

Solution: Inspection revealed the installed toner cartridge was significantly underweight, indicating it was not new. The fuser area was confirmed as the jam location, and the main maintenance kit showed only 20% remaining. Replaced the main maintenance kit (C9152A), cleaned the printer interior, and reset th

Problem: HP LaserJet P4015 experiencing constant paper jams originating from Tray 2.

Solution: Inspection revealed the rear tray guide failing to hold position and a worn nudge roller. The rear adjustment was secured mechanically in place per customer request in lieu of tray replacement. Nudge roller replaced. Print quality and feed operation verified normal at ~326,800 page count.

Problem: Zebra ZT410 industrial thermal printer in Silver Spring, MD was due for scheduled preventive maintenance.

Solution: Technician performed preventive maintenance on the Zebra ZT410, including thorough cleaning of internal components. Unit was tested and confirmed operational upon completion.

Problem: HP LaserJet M607dn presenting multiple error codes alongside a persistent Tray 2 open error.

Solution: Formatter (K0Q14-60002) and EMMC card (5851-6436) were ordered and installed, but error conditions persisted. The customer was advised to replace the unit and ordered a new HP LaserJet M507, which the technician installed and tested on-site.

Problem: Zebra ZM400 thermal printer was due for its fourth quarterly preventive maintenance visit.

Solution: Technician cleared accumulated label debris, performed a full cleaning of internal components, and tested the unit. No parts replacement required.

Problem: Dell C3765 color laser printer presented with multiple concurrent issues requiring on-site evaluation in Laurel, MD.

Solution: Technician assessed the Dell C3765 and determined repair was not viable to proceed with at this time. No repair work performed; service call closed without charge.

Problem: HP LaserJet 600 M603 in Washington, DC repeatedly jammed at Tray 2, with paper stalling behind the multipurpose tray assembly.

Solution: Cleared the jam from behind the MP tray assembly. Replaced the Tray 2 pickup roller, both Tray 2 feed rollers, and the Tray 2 pickup solenoid pad. Cleaned and tested the printer to confirm reliable feed operation.

Problem: Zebra ZM400 thermal printer presented for scheduled preventive maintenance; unit required cleaning and printhead inspection.

Solution: Performed PM service on Zebra ZM400: cleared dust accumulation, cleaned platen roller, inspected printhead condition, and verified print quality through test output.

Problem: Zebra 105SL thermal printer reported for PM20 service. Labels had wrapped around the platen roller, causing severe roller damage.

Solution: Replaced destroyed platen roller, toggle, printhead, and media guide. Performed PM20 maintenance cycle and tested unit to confirm proper label tracking and print quality before returning to service.

Problem: HP Color LaserJet MFP M477fdw reported degraded print quality and abnormal noise during operation.

Solution: Technician performed a full internal cleaning and inspection. A recently replaced toner cartridge had already resolved the image defect and noise. Unit tested with strong output post-cleaning. Black toner cartridge was noted as near-depleted and flagged for replacement.

Problem: Zebra GX430t thermal label printer in Rockville, MD was due for its third of six scheduled preventive maintenance intervals.

Solution: Technician performed scheduled PM on the Zebra GX430t at 452,035 inches of use — cleaning internal components and verifying printer configuration to manufacturer specifications.

Problem: Lexmark C746 laser printer reported a low photo conductor unit warning, indicating the imaging components had reached end of service life.

Solution: Replaced the photo conductor units (C734X24G multi-pack) on the Lexmark C746, cleaned internal imaging components as needed, and reset the page count to restore normal operation.

Problem: Zebra ZT230 (203 dpi) in Alexandria produced smeared barcodes and unacceptable print quality exclusively on white label stock.

Solution: Technician verified print quality degraded only on white labels. Driver was misconfigured as direct thermal; switched to thermal transfer. Adjusted temperature and speed settings across multiple combinations — acceptable barcode output could not be achieved without text smearing. Customer was advise

Problem: Zebra 140Xi4 thermal printer in Falls Church was truncating printed content on the right side of labels. Unit was a callback for a recurring issue.

Solution: Technician adjusted printhead pressure on the Zebra 140Xi4 to correct right-side label cutoff.

Problem: Zebra GX430t thermal printer was due for scheduled preventive maintenance.

Solution: Performed preventive maintenance on the Zebra GX430t. Cutter assembly was inspected but could not be repaired during this visit.

Problem: Zebra ZT410 thermal printer brought in for scheduled cleaning service.

Solution: Cleaned internal components, calibrated the unit, and tested print output on the Zebra ZT410 — no faults detected.

Problem: HP LaserJet M606 reported a fuser error, indicating a defective fuser unit requiring replacement.

Solution: Technician delivered and installed a replacement fuser on the HP LaserJet M606. The defective unit was retrieved and returned for inspection.

Problem: HP LaserJet Pro M521 MFP presented with Tray 2 stuck and unable to slide fully into the printer on day of delivery.

Solution: Inspection revealed the middle of three paper-lifting springs in the Tray 2 cassette had popped loose, preventing full tray seating. The technician re-seated the spring, cleaned the tray assembly, and verified normal operation.

Problem: A Zebra 170Xi4 300 DPI thermal printer in Falls Church was producing dark shadow lines across specific label stock while printed text appeared normal.

Solution: Technician adjusted pressure plungers, removed the front plate, verified full printhead seating, and reseated printhead connections. Resistance was confirmed within spec. The same labels printed cleanly on a second unit; other label stock produced quality output on this printer. The customer opted t

Problem: HP LaserJet M607 in Chevy Chase, MD reported persistent paper jams affecting normal operation.

Solution: Installed a full maintenance kit on the HP LaserJet M607 at 21,135 page count. Cleaned internal paper path components and tested the printer to confirm jam-free operation.

Problem: Zebra 105SL thermal printer in Chevy Chase, MD required preventive maintenance, including printhead, platen roller, and ribbon strip plate replacement.

Solution: PM25 service performed on Zebra 105SL. Technician quoted replacement of 203 DPI printhead (G32432-1M), platen roller (G32011M), and ribbon strip plate (48017). Quote was issued; no response received and case was closed.

Problem: HP LaserJet MFP M632 experiencing random, repeated power cycling — rebooting without warning, dropping fax connections, and losing network connectivity. Firmware had already been updated and environmental factors ruled out prior to the service call.

Solution: Technician diagnosed the root cause as a failing formatter board (J8J61-60001) and fax card (A2W77-67910). No active error codes remained in the event log. Customer elected to replace the unit rather than proceed with component-level repair.

Problem: HP Color LaserJet MFP E877z reported recurring paper jams. Initial error log indicated a fuser jam, though the root cause was not immediately confirmed.

Solution: On-site inspection determined the stacker assembly had been installed incorrectly. The bin-full sensor flag had not been removed per installation instructions. The technician removed the flag, restoring correct sensor operation. Post-correction testing produced no further jams.

Problem: Zebra ZT410 (ZT41042-T210000Z) platen roller pulling in flat box labels but feeding roll labels normally; humidity-damaged label stock suspected as a contributing factor.

Solution: Inspected toggle assembly on the ZT410 and found excessive, uneven pressure — left side significantly lighter than right. Adjusted toggle points to optimal print pressure to prevent label pull-in. Confirmed media sensor completing calibration despite marginal performance. Noted cutter intermittent d

Problem: Zebra 140Xi4 (203 dpi) reported printing only on the left side of the label, leaving the right portion blank.

Solution: Technician identified a loose printhead tension/tilt screw as the root cause. Screw was tightened and printhead tension adjusted to restore full-width, even print coverage across the label. No additional issues found.

Problem: HP LaserJet P4014 reported with fuser failure at approximately 320,060 page count.

Solution: Replaced the fuser unit on the HP LaserJet P4014. Also replaced two RM1-0037 pickup rollers in Tray 2 during the same service visit.

Problem: Zebra ZT230 thermal printer at a Laurel, MD facility was not printing.

Solution: Technician cleaned and calibrated the ZT230. Media sensing mode was incorrectly set to reflective; corrected to transmissive, restoring normal print operation.

Problem: HP LaserJet 8150n reported recurring paper jams originating in the left door, with jams propagating into the right door as well.

Solution: Diagnosed defective rollers in the face-down delivery assembly. Replaced the face-down Delivery Assembly (RG5-1874-000CN) and tested the printer through multiple cycles, confirming clean paper path through both doors.

Problem: HP Color LaserJet MFP M477fnw produced loud abnormal noise during operation at a Germantown, MD office.

Solution: Technician cleaned the unit and diagnosed worn fuser (RM2-6431) and Tray 2 roller set (RM2-5576 pickup, RM2-5577 feed, RM2-5581 separation). Customer elected to replace the machine rather than proceed with repairs.