What is the frequency requirement for the HP LaserJet Pro MFP M25-M27?
The HP LaserJet Pro MFP M25-M27 requires a power supply of 50/60 Hz. This applies to both the 100-127 Vac and 220-240 Vac voltage ranges. (Page 2)
From the official HP Laserjet Pro Mfp M25 M27 manual, page 2
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