VCR wear belt system, involving parts, involvement and frequent start-stop, serious wear and tear, coupled with a lack of proper maintenance and adjustment, therefore, becomes the VCR fault occurs in the most parts. QD9service manual download site
 QD9service manual download site
A, wear belt system working condition QD9service manual download site
 QD9service manual download site
Wear a belt system is shown in figure 1: QD9service manual download site
 QD9service manual download site
Wear path for: used for rod and reel tension - into the end limit guide post - all erasing head to damping pulley - > into the end of the rotating guide pin, into the end the inclined guide pillar - drum - the end the inclined guide pillar - out side rotating guide pin - component/control head (including erasing head, playback head, control head) - the end limit guide post - main shaft/pressure pulley - > the reel. QD9service manual download site
 QD9service manual download site
Panasonic NV series VHS - M type recorder adopts parallel biaxial cassette tape, tape speed of 23.4 mm/s, video head to 12050 '21.2 "tilted to the rotation speed of 1500 r/min spiral scan. Walk in the tension zone system, drum, leading institutions such as under the servo circuit and, with the help of some of the cylindrical fixed guide pillar and rotating guide pin to tape winding with Ω form in the video on the drum, to establish a stable walking system, in this system to realize the video signal of the magnetic a electricity conversion (replay) or a magnetic switch (record). Among them a stable state of tape is the key, must meet the following three conditions: 1. The tape of the geometric center line, in the end of the inclined guide pillar the breakthrough point and the end of the inclined guide pillar cut out point relative to the datum (substrate) parallel to tape box height should be equal. 2. The tape from for reel exported to input the entry of the inclined guide pillar and exported from the end of the inclined guide pillar to reel of the population should be parallel to the datum. 3. In the process of the whole tape, tape should not bending and buckling occurred.

 5    1 2 3 4 5 Next Last