Emerson vcr #vcr755

have you tryed to clean the ace head??? The ace head means audio-control-erase. and is on the right side of the mechanism. this head looks like a big cassette type head and is statioary. This head can be cleaned just like an 8-track{remember those??}or cassette head by applying rubbing alcohol to a q-tip and clean the head from top to bottom. this head also may need cleaning if your tapes seem to speed up and slow down for no reason and at random. Thats because the lower part of the head is the control head and that gives the machine pulses to tell the machine what speed the tape is recorded in then the capstain motor has an fg sensor(freqency generator} and they all go thru a comparitor and the sum of both pulses gives the machine the proper speed setting. Hope this was laid out in understandable english. Good Luck