This video is not a training video and does not carry anything other than video recording of the intermediate test of HP LaserJet 1010 - CNFD731316.
During the maintenance, a breakdown of the thermal film was detected, which was replaced with a new one.
An intermediate start of the printer showed that the crackling was eliminated and the printer prints. According to the configuration sheet, the printer mileage is 53041 pages.
I am finishing assembling the device and preparing a pre-sale video review.