Plotter Repair Service History — West Palm Beach, FL

Problem: HP DesignJet 500 (24", model C7769B) presented with color accuracy issues during printing.

Solution: Installed customer-supplied printheads, cleaned the unit, and tested output. Color issues resolved and machine returned to normal operation.

Problem: HP DesignJet 500 24" (C7769B) produced output in light blue only, indicating multiple printhead failures across all color channels.

Solution: Diagnosed failed printheads on all four channels and a worn carriage belt with exposed cord. Replaced the 24" carriage belt (C7769-60182) and all four printheads (C4810A, C4811A, C4812A, C4813A). Oiled the carriage rod, cleaned the plotter, and verified full-color output.

Problem: HP DesignJet 500 42" plotter would not power on properly; unit initialized and moved the carriage assembly left-to-right before halting with System Error 21:10.

Solution: Technician diagnosed System Error 21:10 as a failed service station (C7769-60374) and identified a worn cutter assembly (C7769-60163) as a secondary issue. Customer declined repair after receiving the quote.

Problem: HP DesignJet 800 (42") reporting intermittent system error 81:01, indicating a vertical-axis jam condition.

Solution: Diagnosed intermittent error 81:01 on the HP DesignJet 800. Confirmed spindle and media loading were not the source. Error 81:01 on the 500/510/800/815 series involves the vertical axis assembly — potential failed components include the heavy metal roller assembly, gear assembly, clutch/motor, or en

Problem: HP DesignJet T120 24" plotter presented with an ink cartridge leak inside the unit, with contamination concerns precluding on-site service.

Solution: Technician transported the unit to the shop for evaluation. The approximately 9-year-old plotter showed significant wear throughout; assessment identified the need for printhead C1Q10A, service station CQ890-67108BM, cutter assembly CQ890-67108, and all four ink cartridges (CZ131A cyan, CZ131A magen

Problem: HP DesignJet T520 36" displayed an 'Unplug Printer' error message, indicating a critical printhead or ink system fault.

Solution: Replaced the printhead kit (C1Q10A) and black ink cartridge (CZ133A), then performed a major ink system cleanup to clear the fault and restore normal operation.

Problem: HP DesignJet T2500 wide-format plotter was crumpling media during the feed cycle, causing repeated paper jams.

Solution: Inspection revealed several felt pads on the front of the star wheel bar had displaced from their seats, disrupting media control. Pads were reseated, the carriage rail was cleaned and lubricated, and the cutter assembly was visually confirmed sharp and serviceable. Print and feed testing confirmed

Problem: HP DesignJet 800 wide-format plotter presented with a worn carriage belt requiring replacement.

Solution: Installed customer-supplied carriage belt on the HP DesignJet 800. Technician noted a leaking service station and a broken carriage ink tube cover; customer was advised of both conditions and elected to defer those repairs.

Problem: HP DesignJet T730 36" reported error code 0042-0117, indicating a carriage belt system fault.

Solution: Inspection found the carriage belt loose but intact — no torn teeth. The right-side pulley was missing its retaining cap, causing the belt to slip off. Flipping the pulley roller was ruled out due to risk of the component falling into the service station. The pulley was sourced and replaced; unit te

Problem: HP DesignJet 500 42" (C7770B) returning error codes 81:01 and 56:03 during printhead alignment.

Solution: Carriage rod was cleaned and lubricated, but errors persisted. Inspection revealed all installed printheads were aftermarket or refurbished. With non-HP printheads identified as the likely cause of both abnormal errors, the customer was advised to replace them with genuine HP printheads. The custome