Service History — Bakersfield, CA — Page 3

Problem: HP LaserJet M606 producing a black vertical line down every printed page.

Solution: Identified a defective toner cartridge — still showing 100% life — as the source of the vertical line artifact. Replaced the cartridge, four pickup rollers, and eight feed rollers. Print quality and feed performance confirmed normal after testing.

Problem: Zebra ZT230 thermal printer in Delano, CA reported not printing.

Solution: Technician cleaned the ZT230 (model ZT23042-T01A00FZ), performed diagnostic testing, and restored normal print operation.

Problem: HP Color LaserJet MFP M477fnw reported producing a loud, heavy noise with dragging — source intermittent and deeper than a typical pickup roller issue.

Solution: Technician replaced two low toner cartridges; two additional colors had been replaced the prior week with no improvement. Transfer belt, fuser, and drive assembly were identified as likely causes, but repair costs were projected to exceed the unit's value. Customer elected to replace the printer.

Problem: Sato M10e thermal printer reported with a failed printhead requiring replacement.

Solution: Technician confirmed printhead failure on the Sato M10e and replaced the printhead to restore thermal print capability.

Problem: HP LaserJet M402dne reported paper jams and abnormal noise during operation.

Solution: Cleared jam found in the duplex tray and confirmed no additional jammed media. Inspection revealed Tray 3 feed and separation rollers worn smooth at 83,967 pages. Replaced pickup roller assembly (RM2-5741-000CN) and separation roller assembly (RM2-5745-000CN). Tray 2 rollers within spec.

Problem: HP Color LaserJet MFP M577z reported image quality defects traced to two tears in the ITU, with additional feed issues in Trays 2 and 3.

Solution: Replaced the ITU (B5L24-67901), two Tray 2 and 3 pickup roller assemblies (RM2-0064), and two separation roller assemblies (RM2-0062). Cleaned and tested the printer to confirm proper image output and reliable paper feed from all affected trays.

Problem: Zebra 105SL Plus thermal printer in Wasco, CA required printhead replacement.

Solution: Technician assessed the Zebra 105SL Plus and ordered two replacement printheads to restore full thermal print quality.

Problem: Lexmark MC2535 MFP in Tehachapi, CA would not scan to email via the ADF, though copy and fax functions through the ADF operated normally.

Solution: Diagnostics confirmed the ADF stalled on scan-to-email attempts. The printer produced a Scan Log citing Connection Failure (could not resolve server address) and Connection Failure (email server not configured). The customer was advised to reconfigure the scan-to-email settings via Micro

Problem: HP LaserJet MFP M4555 required ADF maintenance kit replacement — part two of a two-part service visit.

Solution: Installed the ADF maintenance kit on the HP LaserJet MFP M4555, then cleaned and tested the unit. The administration icon had been removed from the control panel display by IT — a common configuration to restrict end-user changes — preventing a configuration page print for total page count. Copy out

Problem: HP Color LaserJet MFP M477fnw reported error code 59.C0, indicating a motor startup failure preventing normal operation.

Solution: Technician power-cycled the unit, removed and reseated all imaging units, then unplugged the printer and allowed a full capacitor discharge before reconnecting. The printer initialized to Ready state. Machine was cleaned and verified with 60+ test prints.

Problem: HP LaserJet 8150 brought in for general cleaning and preventive maintenance, including inspection and replacement of worn paper-feed rollers.

Solution: Performed full cleaning and maintenance on the HP LaserJet 8150. Inspected roller assemblies; received only one replacement RF5-1834-000 roller against a required quantity of four. Applied roller rejuvenator to dry existing rollers to restore elasticity and reduce jam risk. Supplemented with three r

Problem: HP LaserJet M806 presented for scheduled maintenance; page count indicated a maintenance kit was due.

Solution: Installed the CZ245A maintenance kit and reset the page count. Printer was tested and confirmed fully operational after service.

Problem: Two Zebra GX430t thermal printers in Arvin, CA were due for scheduled preventive maintenance.

Solution: Technician performed preventive maintenance on both Zebra GX430t units, servicing internal components to manufacturer standards.

Problem: Zebra 140xiIII Plus industrial thermal printer producing faint output with visible lines running through printed tickets.

Solution: Cleared stuck labels from the platen roller, cleaned the printhead, and adjusted tear bar, pressure, darkness, and speed settings. Printhead was worn beyond adjustment and replaced with a G48000M 203 DPI unit; printer was cleaned and tested following the swap.

Problem: A Zebra 105SL thermal printer was brought in for a PM20 service interval and was found to require printhead replacement.

Solution: Technician performed PM20 maintenance on the Zebra 105SL and replaced the 300 DPI printhead. Unit was tested and confirmed operational following the repair.

Problem: HP Color LaserJet M775 MFP reported making noise when paper exited the machine.

Solution: No noise was reproduced during the site visit; the customer noted it had stopped the previous day. Newly installed remanufactured toners were identified as the likely cause, requiring a break-in period. The call was monitored for one week with no callback received, confirming the noise resolved once

Problem: Zebra ZT420 thermal printer in Delano, CA brought in for service with unspecified performance issues.

Solution: Technician performed thorough cleaning to remove heavy label adhesive residue and gum buildup throughout the printer, then tested operation to confirm proper function.

Problem: Customer in Arvin, CA required a replacement HP LaserJet M608n laser printer.

Solution: A recertified HP LaserJet M608n was sourced and shipped directly to the customer site as a demo/replacement unit.

Problem: Lexmark CX421adn multifunction laser printer reported with connectivity issues at a Bakersfield, CA office.

Solution: A replacement Lexmark CX421adn color MFP was sourced and shipped directly to the customer's location to restore printing operations.

Problem: HP LaserJet M630 reporting error 30.03.22 (scanner calibration failure) with recurring 41.03.05 paper size/type mismatch errors dating back several months.

Solution: Performed scanner calibration to clear the 30.03.22 error. Resolved recurring 41.03.05 mismatch codes by reconfiguring all trays from 'Any' to 'Plain Paper'. Confirmed firmware was current at version 4.11.2.1. Cleaned the machine and verified full functionality through test prints.

Problem: SATO CL-412e label printer with rewinder due for scheduled quarterly preventive maintenance.

Solution: Performed quarterly PM on SATO CL-412e (S/N: 2M030443). Cleaned printhead, cleared label and paper dust from interior, and inspected feed belts and drive gears.

Problem: Zebra GX430T thermal label printer was due for scheduled preventive maintenance (PM cycle #12).

Solution: Technician performed a full internal cleaning of the Zebra GX430T and verified operation post-service. Unit tested within normal parameters on completion.

Problem: Lexmark MX410de MFP experienced a toner dump, resulting in internal toner contamination requiring thorough cleaning.

Solution: Technician transported the MX410de to the shop, cleared the toner dump, and compressed air cleaned the internal assembly. Unit was tested and returned to the customer in full working condition.

Problem: Lexmark MS610 laser printer in Tehachapi experiencing persistent paper jams traced to worn tray 1 pick tires and a failed tray 1 separation roller assembly.

Solution: Replaced tray 1 pick tires (set of 2, p/n 41X0958) and tray 1 separation roller assembly (p/n 40X8444); cleaned internal paper path and tested printer to confirm jam-free operation.

Problem: Four Zebra GX430t thermal printers in Maricopa were due for scheduled preventive maintenance.

Solution: Technician performed preventive maintenance on all four Zebra GX430t units, servicing internal components to restore optimal print quality and extend operational life.

Problem: Sato B-EX6T1-T Tag thermal printer in Shafter, CA was due for the first of four scheduled preventive maintenance intervals.

Solution: Technician performed PM cycle 1 of 4 on the Sato B-EX6T1-T Tag printer, completing a thorough cleaning of internal components and verifying operation. Unit tested within acceptable margins at close of service.

Problem: Fleet of Sato thermal printers at a Delano, CA facility required scheduled weekly preventive maintenance.

Solution: Technician performed weekly PMs on Sato thermal printers per established maintenance worksheet, servicing the full on-site fleet.

Problem: Zebra ZM400 thermal printer due for scheduled preventive maintenance as part of an ongoing multi-unit PM program.

Solution: Performed interior cleaning on the Zebra ZM400 (ZM42Z-2001-4100D) and tested the unit. PM completed as fifth of eight scheduled services.

Problem: Zebra ZD420 thermal printer required a printhead replacement.

Solution: A 300 dpi replacement printhead was sourced and shipped directly to the customer for self-installation.

Problem: HP Color LaserJet M751dn reported blurry image output. The yellow toner cartridge would not latch, indicating a failed cartridge rail system.

Solution: Replaced the cartridge rail system (RM2-1354). Also installed a network switch and reloaded drivers on two additional printers that had lost network and USB connectivity.

Problem: Zebra GX430t thermal label printer was due for a scheduled preventive maintenance visit (third in a four-service cycle).

Solution: Technician performed preventive maintenance on the Zebra GX430t at approximately 917,604 inches of use, cleaning internal components and reconfiguring the printer to manufacturer specifications.

Problem: Zebra ZT230 thermal printer in Tehachapi reported unable to print.

Solution: Technician ran manual calibration, set the sensor mode to transmissive, cleaned the unit, and verified print output restored.

Problem: Zebra ZT410 thermal printer at a Shafter facility experiencing a communication failure across all interfaces.

Solution: Diagnostics isolated the fault to the main board. A replacement main board and full printer were quoted; the ZT410 main board and power supply were confirmed universal across configurations by Zebra support.

Problem: Zebra GX430t thermal label printer in Wasco, CA was due for scheduled preventive maintenance (visit 4 of 7 in a multi-unit service agreement).

Solution: Technician performed full PM on the Zebra GX430t at 599,308 inches of use — cleaning internal components and reconfiguring printer settings to manufacturer specifications.

Problem: Zebra 140xi4 industrial thermal printer presented with multiple issues, including an active ribbon configuration and a broken screw lodged in the print mechanism hardware.

Solution: Removed the ribbon strip plate and extracted the broken screw from the print mechanism hardware. Reconfigured the unit from thermal transfer to direct thermal mode and tested print output to confirm proper operation.

Problem: Zebra ZT410 thermal printer displayed a persistent 'Media Out – Load Media' error, halting label output at a Bakersfield industrial facility.

Solution: Technician performed a thorough cleaning of the ZT410's internal components and inspected the media path, feed mechanism, and sensors. The unit was operating in a heavily contaminated environment; debris buildup was cleared and all systems were verified before returning the printer to service.

Problem: Zebra ZT510 thermal printer reported alignment issues, with media contacting the media sensor during operation.

Solution: Adjusted the media guide angle to correct media tracking. Cleaned the unit and tested print alignment to confirm proper media path through the sensor.

Problem: Labels produced by the Sato M84 Pro thermal printer were not scanning — output failed barcode verification.

Solution: Replaced the media sensor, printhead, and media spindle guide on the Sato M84 Pro. Recalibrated, cleaned, and tested the unit to confirm scan-ready label output.

Problem: HP LaserJet M605 (E6B70A) reported recurring duplexer jams disrupting two-sided print jobs.

Solution: Technician cleared the jam from the duplexer assembly on the HP LaserJet M605 at 214,680 page count. Duplex printing restored to normal operation.

Problem: HP LaserJet M605dn laser printer needed for deployment at a Shafter, CA location.

Solution: New HP LaserJet M605dn sourced from in-stock inventory and arranged for direct delivery to the customer's site.

Problem: HP Color LaserJet M283fdw producing smudged, fuzzy output and making abnormal noise during operation.

Solution: Cleaned the printer and ADF scanner lens. Identified ECO-compatible toner cartridges as the source of image quality issues. Cleaning the ADF lens resolved streaking during copy and scan jobs.

Problem: Zebra ZD621 thermal printer presented with a broken media holder assembly, the second of two units reported with this fault.

Solution: The media holder assembly was deemed non-serviceable for cost-effective repair. The unit was designated a parts printer; the intact cover and latch were harvested and used to restore the companion ZD621. The cannibalized unit was labeled with its known defective components and returned to the custom

Problem: HP LaserJet P4515n reported recurring paper jams with the rear door jamming under load.

Solution: Technician confirmed the jam condition, replaced the fuser assembly, inspected rollers — found serviceable — and reset the maintenance kit counter.

Problem: A Zebra ZT510 industrial label printer in Wasco, CA was due for a scheduled quarterly preventive maintenance visit.

Solution: Technician inspected and tested the ZT510, confirmed proper media calibration, removed a stuck label from the platen roller area, and verified drive belts and gears were in good condition. Print quality confirmed satisfactory at completion.

Problem: SATO thermal printers at a Buttonwillow facility were due for scheduled preventive maintenance.

Solution: Technician performed preventive maintenance on multiple SATO thermal printers, servicing printheads, platen rollers, and internal transport components to manufacturer specifications.

Problem: Sato CL608e thermal printer presented multiple faults requiring sensor and logic board diagnostics.

Solution: Technician tested switches — confirmed serviceable — then replaced the faulty logic board using a compatible board sourced from a CL408e unit. Following the board swap, calibration was performed and the printer was restored to full operation.

Problem: Sato CL412e thermal printer on a rewinder setup was throwing a persistent ribbon end error despite ribbon being present.

Solution: Cleaned all sensors of accumulated paper dust — error persisted. Confirmed drive belt integrity, then identified the take-up spindle slipping on the used-ribbon core. Adjusted tension springs with no improvement; tested an alternate core, which reduced slipping. Ribbon seating directly on the spindl

Problem: HP Color LaserJet MFP M775 repeatedly jammed at the fuser, persisting after manual jam clearing and multiple power cycles. Error codes 13.B9.D4, 13.B9.A1, and 13.B9.FF were logged.

Solution: Technician inspected the transfer belt path and identified debris obstruction near the fuser. Replaced the fuser kit (CE514A) and Tray 2 roller kit (CE710-69007K), then verified operation with test prints and copies.

Problem: HP LaserJet P3005x producing a vertical line down the left side of every printed page.

Solution: Diagnosed a failing fuser assembly as the source of the vertical line defect. Replaced the fuser (RM1-3717), Trays 2 & 3 pickup rollers (RM1-3763), and Trays 2 & 3 separation roller assemblies (RM1-3738). Cleaned and tested the printer to confirm clean output.

Problem: Customer in Maricopa, CA required a replacement for an aging Lexmark MS810 laser printer.

Solution: Sourced and fulfilled a new Lexmark MS821n monochrome laser printer, shipped to the customer to replace the existing MS810 unit.