Service History — Ventura, CA — Page 3

Problem: HP LaserJet MFP M682 produced a loud gear grinding noise when attempting to print, followed by a 13.B2.D2 paper jam error with no visible jam present.

Solution: Technician found the tray 2 pickup roller installed backwards; reseated it correctly and replaced worn rollers in trays 2, 3, and 4 using OEM roller kits (B5L24-67904, RM2-1275-000, RM2-6772-000). All trays tested jam- and noise-free after service.

Problem: Zebra ZD620 thermal printer presented with three vertical dark bands across printed output and a worn platen roller, reported during a PM26 preventive maintenance visit in Westlake Village.

Solution: Technician identified the platen roller as defective and the vertical dark bands as potentially printhead-, cable-, or board-related. Tested two replacement printheads and a replacement platen roller sourced from parts units; print quality normalized. Verified output and closed.

Problem: Zebra thermal printers in Malibu were due for preventive maintenance.

Solution: Technician performed preventive maintenance on multiple Zebra thermal printers: cleaned internal components, calibrated each unit, and verified operation through post-service testing.

Problem: Zebra ZT510 thermal printer producing smudged images, flagged during scheduled preventive maintenance cycle at a Santa Clarita facility operating multiple units.

Solution: Replaced ribbon on unit three of six ZT510 printers to correct image smudging. Cleaned internal components and verified print quality before moving to remaining units in the fleet.

Problem: Zebra 140Xi4 thermal printer in Santa Clarita required a preventive maintenance service, including printhead replacement.

Solution: Replaced the 203 DPI printhead on the Zebra 140Xi4 and tested operation. Parts replaced included the printhead, platen roller, toggle, ribbon sensor, and media sensor as part of a full PM4 service.

Problem: Zebra ZT421 thermal printer in Agoura Hills reported printhead failure, one of six units requiring service.

Solution: Technician replaced the printhead on the Zebra ZT421 using stock supplied by the customer, restoring print operation.

Problem: Lexmark CS725 laser printer reported recurring paper jams at an Ojai, CA location.

Solution: Inspection revealed the unit was operating with an incorrect power cord, causing voltage irregularities affecting fuser performance. The customer replaced it with the correct cord; fuser temperature was then adjusted, and the printer was cleaned and tested.

Problem: Lexmark XM3150 MFP displayed a 'Connection Error' when attempting to scan to email or a network folder. Print and copy functions were unaffected.

Solution: Diagnosed the error as a corrupt or broken network path, likely caused by an automatic server software update that invalidated the scan-to-email/network-folder configuration. The technician cleaned the unit and advised the customer to have their IT support re-establish the scan destination settings.

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

Solution: Performed preventive maintenance on the Zebra GX430t at 154 inches of use. Cleaned internal components and reconfigured printer settings to manufacturer specifications.

Problem: HP Color LaserJet M553dn in Moorpark, CA reported toner not bonding to paper.

Solution: Fuser assembly (B5L35A) replaced at 10% life remaining. Tray 2 and Tray 3 pickup and separation roller kits (RM2-6577 ×2) also installed. Printer cleaned and tested with no further issues.

Problem: Brother MFC-8900OCDW laser printer brought in with a drum error; the issue persisted even after the customer had installed a brand-new replacement drum.

Solution: Diagnosed persistent drum fault on the Brother MFC-8900OCDW. Reset all parts and supplies counters, cleaned internal components, and tested the printer to confirm normal operation.

Problem: Zebra ZT411 thermal printer required calibration. Labels were being pulled into the platen roller due to overtightened media toggles.

Solution: Performed a manual calibration via power cycle. Adjusted media toggles to correct tension, preventing labels from feeding into the platen roller. Reset darkness setting to align with toggle pressure. Verified output with test prints.

Problem: Printronix T8206 thermal printer experiencing recurring label jams, labels wrapping around the platen roller, and ink residue buildup on the printheads shortly after installation of a new label stock.

Solution: Diagnosed root cause as incompatibility between new thin-backed labels and existing hardware. Yellow ink from label face was transferring onto printheads prematurely; thin backing caused jams and wrap-around on platen rollers and cutter. Adjusted media guides to reduce curl-related feed issues, docu

Problem: A Zebra ZT421 thermal printer in Santa Paula was due for a scheduled preventive maintenance visit (5 of 5 in service cycle).

Solution: Technician cleaned the printhead and internal components, then performed full functional testing. No replacement parts were required to restore proper operation.

Problem: HP Color LaserJet M277dw MFP in Moorpark producing streaks on copies and scans when originals were fed through the ADF.

Solution: Technician identified the streaking as isolated to ADF-originating scans. Cleaned the ADF scanner glass, performed a general cleaning of the unit, and confirmed streak-free output through test copies.

Problem: HP LaserJet 4250n in Simi Valley producing smudged and ghosted output across all print jobs.

Solution: Technician diagnosed concurrent failures: a defective toner cartridge, a worn fuser (RM1-1082), a worn transfer roller (RM1-0699), worn pickup rollers (RM2-6046) in trays 2 and 3, and worn separation rollers (RM2-5642) in trays 2 and 3. All flagged components were replaced, the printer was cleaned,

Problem: Zebra GX430t thermal label printer in Agoura Hills was due for scheduled preventive maintenance (session 4 of 6).

Solution: Technician performed preventive maintenance on the Zebra GX430t at 1,456,611 inches of print history, including thorough cleaning and configuration of the printer.

Problem: OKI C331 laser printer in Fillmore would not initialize, hanging at the fuser warm-up stage across multiple boot attempts.

Solution: Performed a factory reset and cycled power directly from a wall outlet, bypassing the surge protector. Removed toner cartridges, drum, transfer belt, and fuser; cleaned all metal and light sensor contacts throughout. Reinstalled all components and the printer initialized normally.

Problem: HP LaserJet P4015 reported multiple issues, including paper jams and degraded print quality.

Solution: Installed an HP CB388A fuser maintenance kit (110/120V) on the HP LaserJet P4015 at page count 188,723. Reset the maintenance counter and verified jams were cleared and print quality restored.

Problem: Lexmark T640 laser printer in Moorpark producing loud screeching, knocking, and jamming during operation.

Solution: Inspection revealed broken clips from the fuser wand cover causing screeching; a lodged clip had also damaged the fuser, resulting in intermittent jams and knocking. Technician cleaned transfer roller, replaced leaking toner with customer-supplied spare, and installed replacement fuser (parts 40X259

Problem: HP Color LaserJet Pro M454dn reported error code 13.09.14, indicating a paper jam or feed failure in the Santa Clarita, CA location.

Solution: Technician resolved error code 13.09.14 on the HP CLJ M454dn via remote phone support. No on-site visit was required; the fix was completed over the phone.

Problem: Zebra ZT421 thermal printer was depositing adhesive residue from labels onto internal components, with damaged parts requiring replacement.

Solution: Technician replaced the media shelf (P1058930-048) on the Zebra ZT421, then performed a thorough cleaning and functional test to confirm proper label feed and no further adhesive transfer.

Problem: HP Color LaserJet Enterprise M750 producing a recurring magenta spot at the trailing edge of printed pages.

Solution: Identified a defective magenta toner cartridge as the source of the trailing-edge spot. Replaced the cartridge from customer stock and verified output — magenta levels confirmed within acceptable range with no further defects.

Problem: HP DesignJet 800 42" reported a carriage belt failure requiring replacement.

Solution: Replaced the carriage belt on the HP DesignJet 800 42" (model C7780B). Cleaned the plotter mechanically and tested operation to confirm proper carriage movement and print function.

Problem: Zebra GX430t thermal printer in Moorpark, CA was due for a scheduled preventive maintenance visit (3 of 4 in the current PM cycle).

Solution: Technician performed preventive maintenance on the Zebra GX430t at 458,851 inches of usage, including full cleaning of internal components and printer reconfiguration to manufacturer specifications.

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

Solution: Performed scheduled preventive maintenance on the Zebra ZM400. Cleaned internal components and validated operation with customer test print. Service completed as part of a coordinated 8-unit PM cycle.

Problem: Zebra ZM400 thermal printer in Ojai was due for a scheduled preventive maintenance service.

Solution: Technician performed preventive maintenance on the Zebra ZM400, including a full internal cleaning and functional test to confirm proper operation.

Problem: HP LaserJet M602 reported recurring paper jams and excessive paper curl at output.

Solution: Replaced fuser maintenance kit on HP LaserJet M602. Cleaned internal paper path components and tested for proper feed and output. Paper curl and jamming resolved.

Problem: HP Color LaserJet M680 MFP producing intermittent vertical lines along the side of printed and copied pages; issue could not be consistently reproduced during initial diagnostic visits.

Solution: Technician performed multiple on-site diagnostic sessions, updated firmware from FS4 to FS3 interface version, cleaned the scanner glass, and verified network re-configuration following firmware flash. Intermittent lines in prints and copies resolved after glass cleaning and firmware update.

Problem: Zebra ZT610 thermal printer failing to maintain calibration and back-feeding on every label feed cycle, even after a previous media belt replacement.

Solution: Replaced the main board (P1083320-124) and media sensor (P1083320-047). Cleaned the printhead to eliminate a white line artifact, configured the unit on the network, and tested label feeding and calibration.

Problem: HP Color LaserJet M553 brought in for cleaning. During service, a 59.00.F0 error was discovered.

Solution: Technician cleaned the unit and identified a 59.00.F0 fuser drive error. A fuser drive assembly was ordered and installed, but the fault persisted. Further required components were deemed not cost-effective; the customer elected to replace the printer.

Problem: Zebra 110Xi4 thermal printer in the shipping department would not calibrate and the printed image ran off the label; duplicate labels were being produced.

Solution: Inspection revealed a label lodged against the media sensor, preventing calibration. The printer also had a failed print head, drive belt, and platen roller. Serviceable components were harvested from a second out-of-service 110Xi4 unit; the print head, drive belt, and platen roller were installed,

Problem: Lexmark MS810 laser printer in Camarillo presented for scheduled maintenance kit service, one of two units at the location.

Solution: Replaced the fuser, tray 2 pickup roller assembly, and tray 2 separation roller assembly. Cleaned and tested the printer to confirm proper operation.

Problem: Xerox VersaLink C405dn laser printer in Thousand Oaks reporting error codes 062-380 and 062-386.

Solution: Technician diagnosed errors 062-380 and 062-386 as a failed document scanner assembly. Estimate was submitted; the customer did not respond, and the call was closed.

Problem: HP Color LaserJet MFP M479fdw reported a persistent paper jam halting operation.

Solution: Technician located and cleared a paper jam at the fuser assembly, cleaned the paper path, and tested the unit to confirm normal operation.

Problem: Zebra 105SL thermal printer in Santa Clarita producing poor print quality on label output.

Solution: Technician confirmed a defective printhead by cross-testing in a second 105SL unit. Replaced printhead (part #32432-1M). On follow-up visit, adjusted the printhead pressure and ribbon strip plate alignment, then verified output quality by running a full production batch and confirming barcode scan r

Problem: HP Color LaserJet M553 in Santa Paula due for scheduled preventive maintenance.

Solution: Performed PM cycle on HP Color LaserJet M553. Cleaned internal components and feed rollers, inspected for wear, and tested print output. Unit returned to normal operation.

Problem: A Toshiba B-SX5T Horticulture Series thermal printer in Agoura Hills required scheduled PM4-level preventive maintenance service.

Solution: Technician performed a PM4 preventive maintenance service on the Toshiba B-SX5T Horticulture Series, completing a thorough internal cleaning and post-service functional test with confirmed acceptable print quality.

Problem: A Zebra 140Xi4 industrial thermal printer was producing light, poor-quality print output. Adjustments to printhead pressure and darkness settings failed to resolve the issue.

Solution: Technician consulted with Zebra support and confirmed the printhead (Part No. 140-801-00000, 203 DPI) was failing. On return visit, the defective printhead was replaced, the unit was cleaned, and output quality was verified and restored.

Problem: Lexmark MS810 laser printer in Moorpark, CA was due for preventive maintenance and required a full maintenance kit replacement.

Solution: Technician installed a Lexmark MS810 maintenance kit, cleaned internal components as needed, and tested the printer to confirm proper operation.

Problem: Datamax DMX-I-4310e thermal printer required scheduled preventive maintenance, with reported issues including ribbon creasing and poor print quality on small #1 font labels.

Solution: Cleaned interior, printheads, and platen rollers. Resolved ribbon creasing via pressure dial and level adjustments. Reduced print speed for small-label stock. Improved small-font legibility through pressure and heat/darkness calibration. Noted units configured for direct thermal mode despite ribbon

Problem: Datamax 4212 thermal printer required a printhead replacement.

Solution: Technician sourced and ordered a replacement printhead for the Datamax 4212, with the part shipped ground to the customer's location.

Problem: HP LaserJet M3035 in Fillmore reporting recurring ADF jams at the top document feeder — a callback following a prior ADF repair.

Solution: Technician installed a second new ADF Paper Pickup Assembly, cleaned the feeder path, and tested the unit. The ADF fed correctly during the visit. Customer was advised that continued issues would warrant replacing the full ADF assembly.

Problem: HP LaserJet P4015dn would not initialize past the memory count on startup; an engine test confirmed the print engine was functional, isolating the fault to the formatter board.

Solution: Replaced formatter (CB438-69002); unit initially came up ready, but the fault recurred across multiple formatter replacements. DC Controller (RM1-4582) was identified as a contributing factor. After determining further repair was not cost-effective, the unit was replaced with a refurbished HP P4015d

Problem: HP Color LaserJet CM6040 MFP reported producing wrinkled output across print jobs.

Solution: Diagnosed media path on HP CLJ CM6040 MFP at approximately 658,283 page count. Identified root cause of wrinkling and completed necessary repairs to restore print quality.

Problem: HP LaserJet 8100 reported multiple issues, including abnormal noise traced to the fuser and a worn groove on the tray 3 pickup rollers.

Solution: Tray 3 was removed to restore immediate operation via tray 2. Returned to install C3914A main maintenance kit, reset the page count, and tested both trays to confirm normal operation.

Problem: Zebra QLN420 mobile thermal printer reported platen roller wear and grip issues requiring scheduled PM32 preventive maintenance service.

Solution: Replaced the platen roller assembly using kit P1050667-008 (QLN420 platen/gear with holder, linered). Unit was tested post-replacement and confirmed operational.

Problem: HP Color LaserJet 500 MFP M575 presented with recurring paper jams, horizontal lines in output, and persistent error codes 31, 48, and 44.

Solution: Diagnostics identified the transfer kit as the source of print-line defects. Error 31 pick faults occurred frequently in the ADF but the feeder remained operable. Error 31 codes were traced to a mismatched formatter board and/or incompatible firmware — a known complication on refurbished CD645A/CD64

Problem: HP LaserJet 2430n in Moorpark, CA presented with toner dumping and worn feed components requiring inspection and part replacement.

Solution: Replaced 110–127V fuser (RM1-1401-000CN), two Tray 2 pickup rollers (RL1-0542-000CN), two separation pads (RM1-1298) covering Trays 2 and 3, and a fuser gear kit (Q5956-67940) to ensure gear compatibility. Cleaned unit and tested after repair.

Problem: HP Color LaserJet CP3525dn displayed 'DownLD File Now SEND RFU UPGRADE ON USB DEV PORT' and failed to print.

Solution: Formatter board was replaced, but the printer presented an additional underlying fault. The customer declined further diagnosis and repair was discontinued.