Be aware that chip resetters are printer model/line specific. For example, the old 9800 series uses a different chip resetter than the 9900 series---even though they share the same maintenance tank models! Make sure you have the correct chip resetter for your printer. I use recycling materials (maintenance tank refills) from Tastar Supply, who also sells maintenance tank recycling "kits" and chip resetters.
I've also been able to use an old 4800 printer to "reset" tanks. I've used the old chip resetter for the 48/78/9800, place the tank in the 4800, fire it up. Remove the tank and then it works in the 9900. Go figure. 4800 refuses to die, and is the world's largest chip resetter. I've since acquired the new 9900 chip resetter and admire its small and sleek design compared to the 4800.
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