What are the power input specifications for the HP Photosmart 6520?
The HP Photosmart 6520 supports two power configurations: model CQ191-60018 requires 200-240 Vac (+/- 10%) input voltage, and model CQ191-60017 supports 100-240 Vac (+/- 10%) input voltage. Both models operate at an input frequency of 50/60 Hz (+/- 3 Hz). HP recommends connecting the printer directly to a wall outlet. (Page 3)
From the official HP Photosmart 6520 E All-in-One Printer manual, page 3
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