Service History — Naperville, IL

Problem: HP LaserJet MFP M631h reported print streaking and intermittent ADF feed failures resulting in paper jams.

Solution: Replaced a defective toner cartridge with a unit from customer stock, resolving the streaking. ADF feed failures were traced to pages with scotch tape applied — the tape caused roller slip and feed timeouts. Plain media fed without issue. Customer was advised to use the flatbed glass for any taped o

Problem: Zebra ZT510 thermal printer presented for scheduled quarterly preventive maintenance as part of an ongoing PM cycle.

Solution: Technician performed quarterly PM on the ZT510 (203 dpi), thoroughly cleaning the unit. No parts replacement required. Printer tested and confirmed operating within spec.

Problem: Zebra 110Xi3 Plus thermal printer reported a ribbon error and was missing its tear bar during a scheduled PM visit in Bartlett, IL.

Solution: Technician resolved the ribbon error, sourced and installed a replacement tear bar, then tested the unit to confirm proper operation.

Problem: Zebra 105SL thermal printer presented with a failed printhead and incorrect language configuration on the operator menu.

Solution: Technician replaced the printhead using on-site stock, then matched the menu language setting to a reference unit to restore English. Device tested and confirmed operational.

Problem: Customer requested procurement of a new Lexmark MS821dn laser printer for a dealership location in Joliet, IL.

Solution: New Lexmark MS821dn (S/N: 406412401LMVM) sourced from in-stock inventory and delivered to the customer's IT department.

Problem: HP LaserJet M806x reported repeated paper jams occurring at the fuser assembly shortly after a prior fuser installation.

Solution: Inspection revealed the fuser heat roller had developed a hot spot that melted its coating after approximately 83,660 pages — less than one month of use. A known-good used fuser was installed temporarily to restore operation. The defective unit was returned under warranty, and a new OEM fuser was in

Problem: Zebra ZT410 thermal printer presented with a broken toggle bar handle, along with darkness and creasing issues affecting print quality.

Solution: Replaced the toggle bar assembly (P1058930-018, includes lift strap), adjusted media pressure points to correct print darkness and creasing, then verified no remaining issues.

Problem: Customer requested routine maintenance cleaning on a Zebra ZT410 thermal printer at a Villa Park, IL facility.

Solution: Technician cleaned, calibrated, and tested the Zebra ZT410. No mechanical or print-quality issues were found during the service visit.

Problem: Zebra 110Xi4 300 dpi thermal printer reported printhead failure, resulting in degraded or absent print output.

Solution: Technician swapped the 300 dpi printhead (part no. 113-801-00200) using the customer's spare unit, cleaned the printer, and verified output through test prints.

Problem: HP LaserJet MFP M830 was not sending or receiving faxes despite a previously installed fax card and modem replacement.

Solution: Replaced the formatter board (CF367-67915). Network setup required coordination after the new board's MAC address triggered a security DHCP restriction. Telecom inspection confirmed the root cause was a faulty fax line.

Problem: Zebra GX430t thermal printer in Elmhurst, IL was due for scheduled preventive maintenance.

Solution: Technician performed preventive maintenance on the Zebra GX430t at 621,539 inches of use, including cleaning internal components and verifying printer configuration.

Problem: Lexmark MS810n in Orland Park repeatedly pulling multiple pages from the tray, causing persistent misfeeds during high-volume invoice printing.

Solution: Installed tray 2 separation and feed rollers; replaced tray 1 plate assembly and feed roller. Misfeeds persisted due to the multipurpose tray being unsuited for the print volume. An additional tray (40G0802) was added for invoice runs. When the new tray began jamming, the technician found a white co

Problem: Zebra 105SL thermal printer in Lisle, IL was printing continuous labels without stopping — a runaway feed condition disrupting labeling output.

Solution: Technician identified incorrect label feed settings as the root cause, adjusted the configuration parameters, and verified proper single-label output through test prints.

Problem: HP LaserJet M425 in Tinley Park, IL required fuser unit replacement.

Solution: Fuser unit sourced and ordered for the HP LaserJet M425; part shipped directly to the customer's location.

Problem: Zebra 105SL thermal printer not receiving print jobs through the parallel port. Other parallel-port printers on-site printed without issue, isolating the fault to this unit.

Solution: Diagnosed a failed main logic board on the Zebra 105SL. Replaced the board with OEM part #34901-020M. Unit was cleaned and inspected post-installation. Parallel/serial-only architecture limited live print testing due to absence of legacy-port hardware.

Problem: HP LaserJet P4015x reported repeated paper jams.

Solution: Service call was scheduled but cancelled by the customer before the technician arrived on site. No service was performed.

Problem: Zebra GX430t thermal printer in Romeoville, IL was due for its second of three scheduled preventive maintenance visits, with a cutter issue present.

Solution: Technician performed scheduled PM, cleaning and reconfiguring the GX430t. Cutter issues were resolved during the service visit.

Problem: HP LaserJet 500 MFP M525 displaying a persistent 49.38.0C firmware error on bootup, occurring at 100% screen load even after power cycling.

Solution: Cleared the print queue and cycled power; error persisted. Disconnected fax and Ethernet cables and cycled power again with no change. Confirmed the flatbed scanner laser was functional. Diagnosed a likely formatter board and hard drive failure — the error occurred during a scan, and scans are writt

Problem: Zebra ZT510 thermal printer presented with a detached tear bar and a damaged platen roller showing visible cuts along the roller surface.

Solution: Technician reattached the detached tear bar and identified the platen roller as requiring replacement due to cuts. Replaced the platen roller (P1083347-012) and tested the unit to confirm proper operation.

Problem: Zebra 140Xi4 (203 dpi) in Romeoville reported print quality issues, including faded output and darkness inconsistencies across thermal labels.

Solution: Technician cleaned the printhead and adjusted printer settings. Darkness issues were traced to a combination of AS400 configuration, media type, and printhead wear. Printhead was replaced with a 203 dpi unit; labels scanned post-replacement but remained faded at maximum darkness setting of 30. Custo

Problem: HP Color LaserJet 5550 presented with recurring paper jams, most pronounced under heavy toner coverage. Moisture in the paper stock and toner bonded to the pressure roller were contributing factors.

Solution: Replaced the fuser assembly (Q3984A) after an initial replacement unit arrived with a bent metal bracket and could not be seated. Installed the corrected fuser, reoriented paper to letter-R in the tray, replaced two pickup rollers (RF5-3338-000CN), and cleaned the interior. Tested with no further ja

Problem: Zebra 140xi3 presented during scheduled preventive maintenance with a failed printhead, malfunctioning ribbon sensor, and suspected main board fault.

Solution: Technician performed PM inspection and diagnosed the need for a 203 DPI printhead (G48000M), main board (47004M), and ribbon sensor (G46665M). Parts were quoted; unit awaiting customer authorization to proceed with component replacement.

Problem: Zebra 170Xi4 (300 dpi) in Woodridge, IL reported dark lines across printed labels.

Solution: Technician cleaned the printhead and adjusted platen pressure with no improvement, then reseated the printhead and reduced darkness and print speed settings. Print quality returned to acceptable output with no remaining defects.

Problem: AMT XL6350 laser printer reported with a non-responsive button on the upper-left section of the control panel.

Solution: Technician disassembled and cleaned the control panel; the button remained non-responsive after servicing. Call closed pending customer approval to proceed with further repair.

Problem: Zebra S4M thermal printer in Wheaton, IL presented with a worn platen roller requiring replacement — one of a multi-unit batch service deployment.

Solution: Technician replaced the platen roller on the Zebra S4M, then cleaned the unit and ran print tests to confirm proper media feed and print quality.

Problem: Zebra ZT410 thermal printer in Villa Park reported recurring calibration failures and media misfeeds.

Solution: Technician could not replicate the misfeed on arrival but identified a broken cover on the media sensor assembly responsible for black-mark alignment. Replaced the media sensor kit and verified calibration and feed operation with no further issues.

Problem: Customer in Glen Ellyn required a refurbished Zebra ZM400 thermal printer to replace an aging unit.

Solution: Installed and configured a refurbished Zebra ZM400 (ZM400-2001-0200T). Network was set to static IP, then switched to DHCP per the customer's preference. Retained the old printer's network card and printhead as requested. Ran internal test prints to verify operation.

Problem: A Zebra 105SL thermal printer in Elmhurst required scheduled PM37 preventive maintenance, including replacement of the ribbon strip plate, printhead, and drive components.

Solution: Technician replaced the ribbon strip plate (MG 48017), 300 DPI printhead (G32433M), main drive belt (45189-22), and media rewind belt (45189-2). All parts were installed and tested to confirm proper operation.

Problem: Zebra ZT220 thermal printer at a Downers Grove facility was due for scheduled preventive maintenance as part of a multi-unit fleet service program.

Solution: Technician performed PM service on the Zebra ZT220, thoroughly cleaning the interior of the unit and testing print output to confirm proper operation.

Problem: HP LaserJet Managed E50045dw reported as requiring a maintenance kit.

Solution: Technician installed the maintenance kit on the HP LaserJet Managed E50045dw and tested the unit. Network re-enrollment was completed by the customer upon their return, confirming no failures on the network.

Problem: HP LaserJet M551 reported to have a tray order issue requiring a parts order.

Solution: A replacement part was ordered and shipped ground to the customer site to resolve the tray order issue on the HP LaserJet M551.

Problem: HP Color LaserJet CP3525 reporting a 59.F0 error. Fault occurred consistently at the start of calibration cycles but not during standard print jobs.

Solution: Emptied the toner collection unit and confirmed the 59.F0 error reproduced on manual calibration. Replaced the transfer belt kit (CC468-67927); fault persisted, indicating a defective transfer belt assembly. Customer retained the replacement belt and elected to replace the unit.

Problem: Intermec PX6i thermal printer reported print quality issues, including voids and degraded output.

Solution: Technician cleaned the PX6i and tested print output on a 203 dpi printhead (part PX6C010000000020). Print quality verified good with no voids present.

Problem: HP LaserJet 500 MFP M525 ADF would not grab paper. Customer was running stacks of carbon paper and regular paper with receipts taped to each sheet through the ADF for duplex scanning.

Solution: Replaced the ADF maintenance kit (CF117A) despite approximately 80% remaining life, as no alternative solution could be identified for the non-standard media being fed. Customer tested both paper types post-replacement and confirmed normal operation.

Problem: Zebra 105SL thermal printer producing faint vertical lines through printed output, rendering approximately 50% of labels unreadable. New ribbon and roller cleaning had no effect.

Solution: Installed a spare printhead to isolate the defect and confirmed the original printhead as the root cause. Inspected labels, which showed signs of prior moisture exposure. Replaced the printhead (203 DPI, G32432-1M) and toggle assembly (35099M) to restore proper pressure balance. Tested across multip

Problem: HP Color LaserJet MFP M477fdw reported jamming at the rear of the unit. Page count was approximately 30,800.

Solution: On arrival, jams had temporarily stopped. Configuration, usage, and supplies status pages were printed — output appeared light, indicating fuser wear. A cleaning page then jammed before the fuser in the duplex path, confirming a worn fuser. Replacement of the duplex fuser (RM2-6418-000CN) was recomm

Problem: HP LaserJet M608 in Plainfield, IL presented with a non-functional control panel display and no network response.

Solution: Diagnosed a broken J2 4-pin connector at the display. Replaced the display assembly, display connector harness, and trays 2–4 roller kits (RM2-1259 display, J8J70-67904 roller kits). Cleaned and tested the printer; all functions restored.

Problem: HP LaserJet 4250tn producing black streaks and ghosting images on printed pages.

Solution: Installed Q5421A Maintenance Kit components and replaced the RM1-0043 Swing Plate Assembly. Tested the printer post-repair; streaking and ghosting resolved.

Problem: HP LaserJet P4015 arrived due for a maintenance kit replacement, with a page count of 345,020 indicating worn consumables throughout.

Solution: Installed maintenance kit (CB509A) and reset the page count. Fuser was set to high-heat level 1 to address toner-bonding issues on carbon paper. A subsequent tray 3 jam was traced to dry pickup rollers and a faulty solenoid (RK2-0269); new-style rollers were installed in all trays and the tray 3 sol

Problem: HP LaserJet M521DN in Romeoville, IL presented for scheduled preventive maintenance at approximately 15,540 pages on the page count.

Solution: Performed full PM service on the HP LaserJet M521DN. Cleaned internal components and tested the unit; print quality and mechanical operation verified close to manufacturer spec.

Problem: Zebra S4M thermal printer in Carol Stream, IL reported with a worn platen roller causing print quality or media feed issues. Printhead condition also flagged during inspection.

Solution: Technician replaced the platen roller on the Zebra S4M. Inspection revealed the printhead also required replacement; a quote was issued but the customer did not respond, and the call was closed with the printhead service pending.

Problem: Lexmark MS810 laser printer in Romeoville, IL was due for a maintenance kit replacement.

Solution: A genuine Lexmark MS810 maintenance kit was sourced and expedited to the customer's location to restore the printer to factory-specified operating condition.

Problem: Zebra ZT510 thermal printer required replacement; existing equipment was at end of service life with multiple failing components including media sensor, ribbon/head open sensor, print mech latch, and print mech assembly.

Solution: Technician quoted repair parts and new printer options. The customer selected a new Zebra ZT510 203dpi (ZT51042-T010000Z), which was sourced and shipped directly to the Schaumburg facility for customer self-installation.

Problem: HP Color LaserJet CP3525 reported leaking cyan toner and would not print.

Solution: Vacuumed residual toner from the printer interior, replaced the defective cyan toner cartridge, and inspected the unit — no additional faults found.

Problem: HP LaserJet M602 in Bolingbrook, IL reported repeated paper jams and an unexpected paper size error, with occasional mashed text appearing on printed pages.

Solution: Replaced the Tray 2 pickup roller and Tray 2 feed rollers using customer-supplied stock, then cleaned and tested the unit. Mashed text on output pages pointed to a suspect toner cartridge; the customer swapped it with a cartridge from an adjacent M602, after which jams and print defects ceased.

Problem: Zebra 105SL thermal printer in Carol Stream reporting a PM17 Printhead Open error, preventing normal print operations.

Solution: Replaced the printhead closed actuator using a customer-supplied part. Verified error cleared and confirmed no additional issues were present.

Problem: Customer in Plainfield, IL required two new HP LaserJet M507n monochrome laser printers.

Solution: Two HP LaserJet M507n units were sourced and shipped to the customer's location.

Problem: HP LaserJet 4350dtn reported producing ghosting artifacts on printed output.

Solution: Technician verified the ghosting condition and identified a faulty fuser as the cause. Replaced the fuser assembly, cleaned the unit as needed, and reset the page count.

Problem: HP LaserJet M609 producing faded images, marks on the page, missing images, a vertical white line on the right side, and random horizontal fading across the page.

Solution: Removed a toner slip left inside the toner cartridge, which cleared the vertical white line. Persistent horizontal fading was traced to a faulty toner cartridge after cleaning the mirror, swapping the fuser, and cleaning the transfer roller yielded no improvement. A replacement toner cartridge was i

Problem: HP Color LaserJet 5550DN in Joliet, IL reported print queue errors and persistent printing failures that did not clear through control panel or electronic component resets.

Solution: Diagnosed an RFU load error requiring formatter board replacement. Installed replacement formatter (Q7725-68002) and a 32GB flash firmware card with updated firmware. Page count reset following parts replacement. Device tested and closed.