Service History — Silver Spring, MD — Page 2

Problem: Zebra ZT610 industrial thermal printer was due for scheduled preventive maintenance as part of a three-unit fleet service in Alexandria, VA.

Solution: Performed full preventive maintenance on the ZT610, including thorough cleaning of internal components. Unit was tested and confirmed operating within spec.

Problem: Zebra ZT510 thermal printer was due for scheduled preventive maintenance as part of a multi-unit fleet service.

Solution: Performed preventive maintenance on the Zebra ZT510, including full internal cleaning and functional testing to verify print quality and reliable operation.

Problem: Lexmark CS725 laser printer reported a 121 fuser error, indicating a fuser assembly failure requiring parts replacement.

Solution: Technician diagnosed the 121 fuser error on the Lexmark CS725, replaced the fuser kit, then cleaned and tested the unit to confirm normal operation. Two spare fuser assemblies (P/N 41X0252) were subsequently ordered and shipped to separate locations per the customer's request.

Problem: Rockville thermal printer facility required printhead replacements for multiple Datamax units.

Solution: Sourced and shipped one PHD20-2181-01-PB printhead (Datamax I-4206/I-4208/I-4210/I-4212/A-4212) and two PHD20-2240-01-PB 203dpi printheads (Datamax H-4212/A-4212 Mark II) to the customer's Rockville location.

Problem: Zebra ZT420 thermal printer in Annapolis reported a label jam condition affecting media feed.

Solution: Technician cleared the label jam, removed adhesive residue buildup from the media path, and tested the unit with third-party label stock to confirm reliable feed and print operation.

Problem: Zebra ZQ521 mobile thermal printer producing uneven output, with noticeably faded or light print across certain areas of the label.

Solution: Technician assessed the ZQ521 mobile thermal printer for inconsistent print density. Parts availability for this mobile unit was confirmed as limited; work order was closed accordingly.

Problem: Zebra ZD620 (ZD62142-D41L01EZ) presented for scheduled preventive maintenance (PM13) with a control panel replacement and media sensor inspection required.

Solution: Completed PM13 service on Zebra ZD620: replaced control panel (P1080383-241), confirmed media sensor unnecessary as unit operates exclusively in continuous mode, reconfigured media type setting to continuous, ran calibration, and verified output quality via test label prints.

Problem: HP LaserJet MFP M630 reporting error code 13.80.F0 with repeated paper jams occurring at the left corner of the paper path.

Solution: Technician inspected the M630, identified a broken B3M76A entrance sensor as the root cause. Replaced the faulty entrance sensor, a 3-Bin Stapling Mailbox, and an L2718A ADF Kit. Machine tested and confirmed operational after parts installation.

Problem: Brother HL-L8260cdw color laser printer in College Park was producing image defects — rollers leaving visible impressions on output pages.

Solution: Inspection identified a failed fuser assembly and worn tray 1 pickup roller and separation pad assemblies as the root cause of the impression defects. The customer declined repair and opted to source a replacement unit elsewhere.

Problem: Zebra 105SL thermal printer in Falls Church reported continuous label feeding — labels would not stop between print cycles.

Solution: Technician adjusted printer settings and calibrated the peel-off sensors. Unit was tested and confirmed operating correctly.

Problem: HP Color LaserJet Enterprise M553dn reported a toner-related error. The customer had emptied the waste toner bottle, but the error persisted after reinstallation.

Solution: Technician disassembled the waste toner bottle, thoroughly cleaned it, reassembled, and reinstalled it. The bottle reset correctly and the printer returned to normal operation.

Problem: Zebra 220Xi3 industrial thermal printer producing labels with horizontal lines across the print area, indicating printhead wear or ribbon path misalignment.

Solution: Replaced the printhead (203 DPI) and adjusted the ribbon strip plate on the Zebra 220Xi3. Printer was tested after repair and returned to proper print quality.

Problem: Zebra ZT510 thermal printer in Frederick, MD was due for its scheduled quarterly preventive maintenance service.

Solution: Technician performed quarterly PM on the Zebra ZT510, thoroughly cleaning the unit and completing all standard maintenance checks. Printer tested within normal parameters; no parts replacement required.

Problem: HP LaserJet M452nw in Bethesda reported persistent paper feed failures across trays 2 and 3, along with intermittent 59.0240 errors.

Solution: Inspection confirmed worn pickup rollers (RM2-5576), feed rollers (RM2-5577), and separation rollers (RM2-5881) in trays 2 and 3, plus a failing ITU (transfer belt, RM2-6454) triggering the 59.0240 fault. All four roller sets and the transfer belt were replaced, and the printer was cleaned and teste

Problem: Zebra ZT230 thermal printer in Washington, DC required replacement parts to return the unit to working order.

Solution: Replacement parts were sourced and shipped directly to the customer's location. Parts experienced a backorder delay before being delivered and installed on the ZT230.

Problem: Xerox Phaser 4622 reported a fuser error and adjust image error shortly after a fuser replacement.

Solution: Technician reset the fuser via Service mode and performed a memory reset. NVRAM reset was attempted for the drum but did not activate initialization, confirming a defective drum. All parts were replaced and settings, including counts, were reconfigured before the unit was returned to service.

Problem: Zebra 105SL (model 10500-3001-2000) presented with faded output on the right side of printed labels, indicating uneven print density across the printhead.

Solution: Technician performed a PM7-level preventive maintenance service on the Zebra 105SL and resolved the right-side fading issue, restoring uniform print density across the full label width.

Problem: HP LaserJet M426fdn tray 2 lift mechanism failed to raise paper to the feed position, preventing the printer from picking sheets.

Solution: Technician investigated the tray 2 lift assembly on the HP LaserJet M426fdn. The customer confirmed the tray issue resolved on its own and cancelled the service call, requesting a callback if the problem recurs.

Problem: Lexmark MS610 laser printer due for preventive maintenance; customer requested a replacement maintenance kit.

Solution: Maintenance kit sourced and ordered for the Lexmark MS610. Part shipped ground delivery to the customer's location to restore the printer to manufacturer-specified service intervals.

Problem: Xerox Phaser 6350 laser printer in Bethesda, MD producing pages dominated by red output, with horizontal red banding running down each printed page.

Solution: Inspection revealed the magenta drum unit heavily coated with red toner, contaminating the entire imaging unit. Replacement of the full imaging unit assembly (Part #108R00645, encompassing all drum units) was recommended. The customer was awaiting internal approval to proceed with repair or device r

Problem: Zebra 105SL 10500-3001-2000 thermal printer reported needing mainboard and printhead replacement during a PM28 preventive maintenance inspection.

Solution: Technician replaced the mainboard (34901-020M) and 300 DPI printhead (G32433M) on the Zebra 105SL. Parts were ordered, installed, and the unit was tested and returned to service.

Problem: Zebra 105SL industrial thermal printer presented at PM15 service interval requiring replacement of multiple critical components simultaneously.

Solution: Assessment revealed the unit needed a main board, printhead, take-label sensor, platen roller, ribbon take-up spindle, ribbon strip plate, toggle assembly, and ribbon roller — too many worn components to justify repair; unit was designated as a parts printer.

Problem: HP Color LaserJet Pro MFP M479fdn reported a fuser issue requiring a second service visit to complete the repair.

Solution: Replaced the fuser assembly (RM2-6460-000CN) and cleaned the scanner glass on the HP Color LaserJet Pro MFP M479fdn. Unit was tested and returned to full operation.

Problem: Zebra ZM400 thermal printer in Hyattsville, MD was due for a scheduled preventive maintenance visit (second in a five-visit series).

Solution: Technician performed scheduled PM on the Zebra ZM400, completing a full cleaning of internal components and functional testing to confirm proper operation.

Problem: HP LaserJet MFP M632fht in Laurel, MD required a maintenance kit at 673,016 page count.

Solution: Installed a complete maintenance kit on the HP LaserJet MFP M632fht. Remaining pickup roller and separation roller assemblies were stored in the printer's bottom storage bin. Cleaned and tested the unit to confirm proper operation.

Problem: Zebra 105SL thermal printer reported ribbon creasing, causing print quality defects.

Solution: Technician performed PM55 preventive maintenance and made multiple mechanical adjustments to eliminate ribbon creasing and restore consistent print output.

Problem: Zebra 105SL thermal printer producing multiple lines in print output. Unit showed signs of physical impact; LCD cover displaced and media sensor warped out of position.

Solution: Removed and cleaned ribbon guide, reseated warped media sensor, and repositioned displaced LCD cover. Installed customer-supplied spare parts initially, then replaced with ordered components: Ribbon Roller Kit P1006101, Toggle Assembly 35099M, and Ribbon Strip Plate 48017. Added three foot stands fr

Problem: Lexmark MS810dtn producing blurry output across all printed pages.

Solution: Diagnosed blurry output to an end-of-life image unit. Replaced the image unit, fuser assembly (40X7743), three pickup roller assemblies (40X7593), and three separation roller assemblies (40X7713) across Trays 1, 2, and 3. Fuser was at 10% life remaining; all pickup and separation rollers showed sign

Problem: Lexmark MX510de in College Park producing reduced-size copies, with scan lines also present on output.

Solution: Cleaned the scanner glass to eliminate scan lines. After exhausting all copy size settings in the on-device menu without resolution, accessed the printer's web portal and located the setting to restore copies to original scale. Output verified normal after adjustment.

Problem: Zebra GX430t thermal printer in Bethesda, MD was due for scheduled preventive maintenance as part of a multi-unit service agreement.

Solution: Performed preventive maintenance on Zebra GX430t at 550,629 inches of use. Cleaned internal components and reconfigured printer settings to manufacturer specifications.

Problem: Lexmark X658de laser printer producing faded output on one side of the page.

Solution: Firmware update and factory default reset did not resolve the one-sided fading. Contrast settings were adjusted, bringing print quality to an acceptable level for the customer.

Problem: HP LaserJet M607n at a Rockville, MD label-printing station was producing only half-page output and jamming repeatedly. A refurbished replacement unit sent to the site exhibited the same symptoms shortly after being brought online.

Solution: Technician evaluated both the original and replacement HP LJ M607n units on-site; both presented multiple faults. A tested spare HP LJ M607n was deployed as a loaner to restore label-printing operations. The two defective units were returned to the shop, where serviceable rollers, fusers, and other

Problem: HP Color LaserJet Flow MFP M577z reported intermittent paper jams and a knocking sound from the ADF during copying, with stretched image distortion on ADF-fed pages. Flatbed copies and direct prints were unaffected.

Solution: Replaced worn pickup roller assemblies and separation roller assemblies in trays 2 and 3. Installed replacement ADF assembly (part B5L47-67907) to resolve the feeding, image-stretching, and knocking issues. Cleaned and tested printer after repairs.

Problem: HP Color LaserJet M880 MFP in Bowie, MD reported error code 30.01.41 (scanner error), with the scanner showing no light or boot activity.

Solution: Technician reseated the formatter, SD/USB cables, and SCB board connections. Scanner error cleared after resets, but output shifted to all-pink pages. A firmware update resolved the pink-sheet symptom. Suspected intermittent power quality from nearby high-draw appliances; an APC LE1200 voltage regul

Problem: HP DesignJet T795 44" plotter in Greenbelt, MD reporting error 08:04 on startup; unit failed immediately upon pressing the menu button.

Solution: Ran carriage and Main PCA diagnostics; confirmed carriage failure code 02.1:10 with carriage stalled and immovable. Manually repositioned carriage — belt and clips undamaged. Oiled carriage rod, cleaned encoder strip. Initial firmware update failed; performed EEROM reset, after which firmware update

Problem: HP Color LaserJet M477fdw reported smudging on printed output accompanied by an audible squeaking noise during operation.

Solution: Technician diagnosed a failed fuser assembly as the cause of both the image smudging and squeaking. Repair required replacement of fuser assembly RM2-6418. The customer declined the repair; the call was closed without service performed.

Problem: Zebra ZT410 thermal printer presented for scheduled preventive maintenance. During cleaning, multiple blown diodes were found on the printhead and the printhead toggle was broken.

Solution: Technician cleaned the printhead and cleared paper dust accumulation. Inspection revealed multiple failed diodes on the printhead and a broken toggle bar; quoted replacement of the 203 dpi printhead (P1058930-009) and toggle bar with lift strap (P1058930-018). Customer deferred repairs pending appro

Problem: HP DesignJet Z3200 44" plotter presented with faded colors and would not print. Error 21:13 (Service Station) was found on initial diagnosis.

Solution: Replaced service station (Q6718-67025) and carriage belt (Q6659-60175). Installed 12 new ink cartridges and 6 new print heads across HP 70 and HP 73 series. Error 86:01 and 87:11 appeared; encoder strip was cleaned and reinstalled. PSU/main switch failure required full power supply replacement (Q671

Problem: Zebra 105SL thermal printer presented with a complete loss of power at a Laurel, MD facility.

Solution: Technician inspected the unit and diagnosed a failed power supply board. Part number P1019024 was sourced and installed on a return visit, restoring full operation to the printer.

Problem: HP LaserJet 4250 in Gaithersburg, MD presented with recurring lines on output and required a maintenance kit and solenoid replacement.

Solution: Installed maintenance kit and solenoid on the HP LaserJet 4250. Lines persisted post-installation; inspection revealed a third-party toner cartridge with toner contamination on the exterior. Swapping in a clean OEM-sourced cartridge eliminated the lines on internal test prints. Maintenance kit repla

Problem: Zebra GX430t thermal label printer in Arlington, VA was due for a scheduled preventive maintenance visit (second in a four-part service cycle).

Solution: Technician performed scheduled PM on the Zebra GX430t at 317,930 inches of use, including full internal cleaning and printer configuration verification.

Problem: HP Color LaserJet M479fdw reported a persistent paper jam error with no visible obstruction found during initial inspection.

Solution: Sensor flags tested functional. A fuser-related stuck-jam error code led the technician to disassemble the printer, where paper was found wrapped inside the fuser assembly. Paper was extracted, all rollers and the scanner glass were cleaned, and the unit was tested to confirm normal operation.

Problem: A Zebra 105SL thermal printer was due for preventive maintenance and required a thorough cleaning and configuration review.

Solution: Technician performed a PM24 preventive maintenance service on the Zebra 105SL (model 10500-3001-2000): cleaned internal components, adjusted printer settings, and verified proper operation through post-service testing.

Problem: Zebra ZT230 thermal printer in Takoma Park reported producing light print output, rated 3 out of 5 in severity.

Solution: Technician inspected the ZT230 and performed print quality testing; printer output verified within acceptable parameters upon evaluation.

Problem: Zebra ZT510 thermal label printer due for scheduled quarterly preventive maintenance (1 of 4).

Solution: Inspected platen roller, printhead, and drive belts and gears — all within spec. Cleaned ink buildup from the printhead. No additional issues found.

Problem: Zebra 220Xi4 industrial thermal printer in Falls Church, VA required a replacement printhead and media guide plate cover.

Solution: Replaced the printhead and sourced a compatible media guide plate from a donor Zebra 220Xi4 unit per the customer's request. Printer was tested and confirmed operational after repair.

Problem: HP LaserJet 8150n reported recurring paper jams.

Solution: Inspection of the paper transport path revealed rollers coated with a glue-like residue. Affected transport rollers were thoroughly cleaned and the printer was test-run to confirm jam-free operation.

Problem: HP Color LaserJet 5550 leaving excess toner on printed pages.

Solution: Inspection revealed a leaking OEM magenta cartridge. Cleaned residual toner from the printer interior. Demonstrated cartridge pre-installation inspection procedure to identify side leaks — a recurring issue with HP OEM cartridges sourced from low-cost suppliers. Replaced the MP tray pickup roller (s

Problem: Lexmark MS810n laser printer in Arlington, VA required a maintenance kit, one of two units at the location.

Solution: Replaced the fuser, tray 1 pickup roller assembly, and tray 1 separation roller assembly. Cleaned and tested the printer to confirm proper operation.

Problem: A Hyattsville, MD customer required four Zebra ZT510 thermal printers for their operation.

Solution: Four Zebra ZT510 industrial thermal printers were sourced and shipped ground directly to the customer's location in Hyattsville, MD.