Section 3.5 of a Spanish repair course on the ultrasonic cleaning tank, a 395 KB PDF within the workshop equipment chapter. No device model is given. Ultrasonic baths are used to remove corrosion and residues from liquid-damaged motherboards with isopropyl alcohol or a dedicated cleaning fluid. Technicians should remove the battery, shields where possible and sensitive parts such as microphones, speakers or vibrators first, and dry the board fully before powering it. The document opens in any PDF viewer.
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