Replay images appear when the machine noise, and distorted in the vertical direction, and sometimes slight friction "hissing" sound can be heard, serious when electronic search will display head jam like "X" characters and flashing. BzMservice manual download site
 BzMservice manual download site
The above phenomenon is estimated to be replay video head can not correctly cut tape scanning track signal. According to the drum rotating friction "hissing" sound, the preliminary judgment fault in the drum. Teardown, inspection found that the drum at the top three traction adjusting screw has been artificially adjust, causing internal drum motor rotating transformer ferrite magnetic core of biased towards a certain direction, making smaller internal and external core clearance, and rotation of the drum motor resistance, which produces "hissing" sound of friction. Using a screwdriver turn the drum on top three traction adjusting screw, with handle (not too big) screwing, respectively, with the hand on the rotating drum resistance, don't feel them one by one to three screws into the screwing in half a circle. After the adjustment of commissioning to normal, troubleshooting.BzMservice manual download site