Service History — Knoxville, TN — Page 3

Problem: An HP Latex 335 wide-format printer in Talbott, TN required installation of a replacement drive/tensioner belt. The part had already been sourced and was on-site.

Solution: The technician installed the on-site replacement drive/tensioner belt on the HP Latex 335, restoring the printer to full operation.

Problem: HP LaserJet Enterprise 600 M601n at a Gatlinburg front desk location reported degraded print quality at approximately 514,439 page count.

Solution: Inspection identified worn RM1-0037 pickup rollers (two required) and heavy debris accumulation on solenoids and sensor flags. A parts-and-labor quote was submitted; the customer did not authorize repair and the call was closed.

Problem: HP LaserJet 4250n toner door was extremely difficult to open and close; Tray 3 also exhibited misfeeds due to a missing cassette guide plate.

Solution: Diagnosed toner door binding caused by plastic hinges rubbing against guide rails. Lubricated hinges and rails to restore smooth operation. Noted Tray 3 cassette guide plate absent; customer confirmed the tray is not in active use. Guide plate installation recommended if the tray is put back into se

Problem: HP LaserJet M608 producing light, smudged, and slightly blurry output; fine-line details lacked boldness and ghost images appeared on the page.

Solution: Cleaned the machine at 73K pages since the last maintenance kit. Replaced the fuser maintenance kit; ghost images and fuser jams persisted, prompting a swap to the original fuser followed by a warranty replacement fuser, which resolved the ghost imaging. Compatible toner was exchanged for an OEM car

Problem: Zebra ZT510 thermal printer was due for its quarterly preventive maintenance visit (4th of 5 scheduled PM intervals) at an Oak Ridge facility.

Solution: Technician performed quarterly PM on the Zebra ZT510 (203 dpi). Initial inspection revealed a worn printhead; machine was cleaned and tested. On the follow-up visit, the printhead (P1083347-005) was replaced, the unit was cleaned, and final testing confirmed full operation.

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

Solution: Performed full PM on Zebra GX430t. Cleaned internal components, verified and adjusted configuration settings, and repaired the media cutter assembly.

Problem: Zebra ZT410 thermal printer in Jefferson City, TN not feeding labels or ribbon; drive system found binding during diagnosis.

Solution: Technician identified failed drive motor bearings catching internally; replaced drive motor (P1058930-040). Ribbon take-up spindle (P1058930-045) also replaced after respool spindle failed to engage. Firmware updated with no improvement. Zebra Level 2 support consulted; main board or power supply ci

Problem: HP Color LaserJet M452dw producing image quality defects traced to the cyan toner cartridge.

Solution: Diagnosed image issue on HP Color LaserJet M452dw (page count: 33,758). Defective cyan toner cartridge identified as root cause. Printer cleaned and tested; customer advised to replace the cyan toner cartridge.

Problem: HP LaserJet 4250 in Harriman, TN presented with a vertical line running down the right side of printed pages. The customer also requested a general cleaning.

Solution: A near-depleted toner cartridge was identified as the cause of the vertical line defect. Swapping in a compatible replacement cartridge resolved the image quality issue. Inspection revealed the fuser (RM1-1082), transfer roller (RM1-0699), swingplate assembly (RM1-0043), Tray 2/3 pickup rollers (RM1

Problem: HP LaserJet M602 producing light print along the side of pages, indicating a toner delivery or cartridge fault.

Solution: Inspected the HP LaserJet M602 and identified a defective toner cartridge as the cause of light-sided output. Replaced the faulty cartridge with a new unit; copy quality returned to normal across all tests. Machine also had a previously installed fuser and roller set. Cleaned the printer and confirm

Problem: HP LaserJet MFP E52645 reported error 98.00.00 — a firmware or disk fault — halting normal operation at a Knoxville pre-registration location.

Solution: Attempted partial disk clean; secondary error 99.09.66 appeared. Performed Erase/Unlock procedure, reformatted the disk, and reloaded firmware. Printer initialized to Ready. Reconfigured all device features, cleaned the unit, and verified full operation through testing.

Problem: HP LaserJet Pro 400 M401 reported intermittent connectivity failures traced to the formatter board.

Solution: Formatter board inspected; a loose cable connection was identified — reseating the cable temporarily restored connectivity. Formatter replaced, but issues persisted. A second replacement formatter was installed and IT was engaged to resolve the network connection on their end.

Problem: Zebra 105SL thermal printer in Pigeon Forge, TN reached end of serviceable life and was designated for disposal following a PM4-level assessment.

Solution: Technician performed a PM4 discard evaluation on the Zebra 105SL, recovered all viable salvageable components, and decommissioned the unit for disposal.

Problem: HP LaserJet 4200 on a production floor reported feed issues, with the page count at 581,443 — indicating heavily worn internal rollers.

Solution: Technician replaced three rollers on the HP LaserJet 4200, restoring reliable paper feed for continued high-volume production use.

Problem: Canon imageCLASS MF6160dw in Chattanooga experienced repeated jams during duplex printing; inspection revealed worn gearing within the duplexer assembly.

Solution: The technician replaced the worn duplexer assembly, restoring reliable two-sided printing to the Canon imageCLASS MF6160dw.

Problem: HP LaserJet Enterprise MFP M528 reporting a 98.00.0C error code on boot, suspected firmware or hard drive/formatter fault.

Solution: Relocated device to an isolated outlet away from nearby charging equipment; error persisted. Performed half-erase and full-erase routines, then loaded updated firmware via thumb drive. Diagnosed faulty hard drive/formatter (part 1PV64-60002) and replaced it. IT was engaged to reconfigure the device

Problem: HP Color LaserJet Enterprise Flow MFP M682 printing with heavy cyan contamination across all pages — cyan toner leaking onto transfer kit and output.

Solution: Identified a leaking cyan toner cartridge as the root cause. Cleaned the printer interior to remove cyan toner residue. Replaced the cyan toner cartridge once the correct replacement arrived, then inspected and confirmed the previously installed transfer kit was undamaged. Print quality tested and v

Problem: Zebra 105SL 200DPI thermal label printer producing missing print on labels during quarterly preventive maintenance visit.

Solution: Inspected printhead and platen roller; platen roller was serviceable with no damage. Printhead showed no debris but print defect persisted after cleaning, confirming printhead failure. Replaced printhead (part G32432-1M); ribbon take-up spindle was not advancing — removed and reloaded ribbon. Post-s

Problem: Zebra ZD620 thermal printer in Oak Ridge, TN reported cutter and media sensor faults, requiring a scheduled PM and component-level evaluation.

Solution: Technician performed PM service and replaced the cutter, printhead, and platen roller using donor parts. Confirmed media sensor replacement unnecessary — unit runs continuous media only. Clear cover also replaced.

Problem: Brother MFC-L6900DWG laser printer reported not feeding paper; ADF also pulling multiple sheets per pass.

Solution: Cleaned the machine, then replaced the ADF separation roller assembly (D001R9001) and ADF pick roller assembly (D00227001). Tested feed performance across both the main tray and ADF; issue resolved.

Problem: HP LaserJet M528 reported error code 98.00.00, indicating a hard drive fault. The paper cassette tray was also failing, with a broken lift indicator.

Solution: Replaced the hard drive (5851-6712) and reloaded firmware. The cassette tray (RM2-5690) was inspected; after evaluating a replacement unit, the technician determined the original tray was more practical to repair and restored it to working condition. Device tested and returned to service.

Problem: HP DesignJet T510 42" plotter would not connect to the network and refused to print jobs.

Solution: Tested a JetDirect 600 from stock — pingable but Java via web portal was failing. Reinstalled the JetDirect 635 and coordinated with the customer's IT team, who confirmed DHCP had been experiencing issues. Advised reconfiguring to a static IP; IT applied the change and print connectivity was confirm

Problem: Lexmark MS810 laser printer in Sevierville, TN required an urgent maintenance kit — fuser and roller assemblies needed replacement.

Solution: Technician delivered one fuser unit, five pickup roller assemblies, and five separation roller assemblies to the customer site for the Lexmark MS810.

Problem: Zebra ZT230 thermal printer in Alcoa, TN was unable to establish a wireless network connection.

Solution: Technician diagnosed a faulty wireless card and replaced it from available stock. Connectivity was restored; remaining network configuration was deferred to the customer's IT team to complete printer setup.

Problem: Zebra 140xi4 thermal printer in Maryville, TN reported printing off center.

Solution: Technician adjusted the media shift setting and replaced a broken supply spindle to correct lateral print alignment.

Problem: Zebra ZT410 thermal printer in Maryville, TN reported a persistent no-ribbon error.

Solution: Diagnosed fault to a failed printhead. Replaced with OEM printhead P1058930-009 (203 dpi), then calibrated and tested the unit to confirm error clearance and proper ribbon detection.

Problem: Zebra 105SL (model 10500-2001-0070) submitted for scheduled preventive maintenance as unit 12 of a 19-printer fleet serviced at a Powell, TN facility.

Solution: Performed full PM on the Zebra 105SL, including cleaning and functional testing. Transferred a compatible media guide from another unit in the fleet to restore proper media alignment. Printer was bench-serviced off-site and returned to the customer location upon completion.

Problem: Zebra ZD620 thermal printer submitted for PM12 preventive maintenance; platen roller required service.

Solution: Replaced worn platen roller, updated device settings, performed full cleaning, and tested output before returning the unit to service.

Problem: HP Color LaserJet M477 presented with multiple issues requiring on-site diagnosis.

Solution: Replaced the fuser assembly. Advised the customer on proper media selection for thicker paper stocks and configured the workstation's print driver settings to match the heavier media type.

Problem: Zebra 110xi4 in Lenoir City, TN reported a head-open sensor error and displayed a persistent 'Ribbon In' fault when configured for Direct Thermal mode, preventing the unit from printing.

Solution: Bench diagnostics confirmed a faulty ribbon sensor or logic board triggering the false 'Ribbon In' alert in Direct Thermal mode. Switching the print method to Thermal Transfer cleared the fault and restored clean output. With no ribbon loaded, the printer performs correctly in Thermal Transfer mode

Problem: HP DesignJet T730 reported ink leaking internally; customer noted the service station sponge was saturated and paper-recognition errors were present.

Solution: Removed cover and inspected the service station. Cleaned the line sensor and checked the belt. Replaced the service station (F9A30-67052) and line sensor (CQ890-67001). Tested the unit and confirmed normal operation.

Problem: Lexmark MX410de laser printer in Gatlinburg, TN presented for the second session of a scheduled general maintenance service.

Solution: Technician completed general maintenance (session 2 of 2) on the Lexmark MX410de. No mechanical or print-quality issues were identified during the service visit.

Problem: Zebra 105SL Plus industrial thermal printer was due for a PM4-level preventive maintenance service at a Knoxville facility.

Solution: Technician performed a full PM4 preventive maintenance cleaning on the Zebra 105SL Plus. Unit was tested and confirmed operational following service.

Problem: HP LaserJet M750dn (Model D3L09A) required on-site installation, hardware assembly, and network configuration at a Harriman, TN business.

Solution: Unboxed the M750dn and optional Tray 3, assembled both units onto the pre-positioned 500-sheet stand, connected power, and configured network settings. Verified connectivity by pinging the printer on the customer network. Printer arrived without toner; the vendor was notified and arranged shipment d

Problem: A Zebra 105SL (model 10500-3001-2000) in Maryville, TN was due for a PM21 preventive maintenance service and presented with a media guide requiring replacement.

Solution: Performed PM21 service on the Zebra 105SL. Replaced the media guide using customer-supplied stock, then calibrated the unit and adjusted the tear-off setting to restore proper media handling.

Problem: Zebra 105SL Plus thermal printer in Oak Ridge reported poor print quality.

Solution: Replaced printhead with unit from customer stock, then cleaned and tested the printer. Premature printhead failures traced to airborne particulate contamination; the facility environment was heavily soiled. Customer was advised to keep the top lid closed at all times to limit particle ingress.

Problem: Sato Horticulture Series tag printer brought in for scheduled preventive maintenance (PM visit 5 of 6).

Solution: Performed PM service on Sato Horticulture Series tag printer. Cleaned internal components and tested print quality; unit passed close-margin verification.

Problem: HP DesignJet Z2100 24" reported color calibration failures, producing inaccurate output across print jobs.

Solution: Replaced the printhead from stock inventory on the HP DesignJet Z2100 24" (Q6675D). Post-replacement calibration verified color accuracy within acceptable margins. Repair completed in approximately one hour.

Problem: Customer requested procurement of a new HP LaserJet M507n laser printer with an additional paper tray for their Knoxville, TN location.

Solution: New HP LaserJet M507n and supplemental paper tray sourced and shipped separately to the customer's site, with staggered delivery dates confirmed.

Problem: A Zebra 105SL industrial thermal printer in Alcoa, TN was due for a PM10 preventive maintenance service.

Solution: Technician performed a PM10 cleaning service on the Zebra 105SL, adjusted printer settings, and verified correct operation through post-service testing.

Problem: HP Color LaserJet Pro MFP M477fnw requiring replacement under prior service agreement for a recertified unit sold earlier in the year.

Solution: Shipped an OEM replacement HP M477fnw MFP directly to the customer. Arranged pickup of the defective unit for return to the service office for repair. Customer advised to keep the replacement boxed until needed.

Problem: Zebra S4M thermal printer producing labels with missing print in multiple locations across the label surface.

Solution: Inspected printer condition; found no physical damage to platen roller or printhead. Cleaned printhead — missing print persisted in multiple zones. Replaced printhead (Kit Print Mechanism 203 dpi, part #G20067-104M). Adjusted pressure and darkness settings to restore full print quality.

Problem: Toshiba B-SX5T Horticulture Series thermal printer brought in for scheduled PM (visit 4 of 4); inspection revealed a failed printhead requiring replacement.

Solution: Performed full PM service including cleaning. Diagnosed failed printhead and identified replacement unit (part #7FM01641100). Customer sourced the printhead independently at a lower price; call closed without technician-supplied part installation.

Problem: Zebra ZT510 thermal printer in Powell, TN reporting a persistent paper-out error despite media being properly loaded.

Solution: Technician repositioned the media sensor, reseated the sensor cable, and cleaned the sensor. Unit tested and confirmed operational after adjustments.

Problem: HP LaserJet P4015 in Newport, TN reported false jam errors from Tray 2 and paper jams beneath the toner cartridge when feeding from Tray 1.

Solution: Verified feed rollers were in good condition. Confirmed recurring false jams from Tray 2 and a consistent jam point under the toner cartridge on Tray 1 feeds. Unit was flagged for parts harvesting. Batch of P4015 units also presented maintenance kit errors and tray feed issues across multiple device

Problem: Customer required a new Lexmark MS821n laser printer procured and delivered to their Knoxville, TN location.

Solution: New Lexmark MS821n laser printer sourced and shipped directly to the customer's site in Knoxville, TN.

Problem: Zebra 105SL thermal printer presented with cuts in the lower peel roller, requiring inspection and part replacement.

Solution: Technician confirmed damage to the lower peel roller, replaced the component, cleaned the unit, and tested to verify proper operation.

Problem: Customer requested a preventative maintenance visit on an HP DesignJet Z5600 44" plotter. The unit was operational; the PM was overdue and the customer wanted a technician to inspect it.

Solution: Performed a full preventative maintenance service on the HP DesignJet Z5600 44". Cleaned internal components, inspected mechanical and print systems, and confirmed the unit was operating to specification.

Problem: Canon imageCLASS MF733Cdw reported a persistent paper jam error message.

Solution: Technician traced the fault to an accordion-style jam inside the fuser unit. The jam was cleared, the fuser cleaned, and the printer tested to confirm normal operation.

Problem: A Zebra ZM400 industrial thermal printer in Jefferson City, TN was due for a scheduled preventive maintenance service.

Solution: Technician performed preventive maintenance on the Zebra ZM400, including full internal cleaning and functional testing to restore the unit to manufacturer performance standards.