Question about Televison & Video
Bought used Proscan PSVR81 VCR. No manual, no remote control.
VCR was working fine. One day pulley for drive belt fell off, drive belt came lose and a tape got all unwound inside the unit. Opened unit, removed tape, put pully and belt back. The VCR mechanism works, but now cannot get clear picture.when playing tape. Audio is fine, but video have streaking lines across picture as would be when poor trackin occurs. Can't find any tracking control.
If the fast forward button is pressed, the video appears perfect at the instant just before it fast forwards. Otherwise video not working properly. Is there an alignment procedure to perform when replacing belt?
This is a problem with the process called 'tape loading' - pulling the tape loop out of the cassette and wrapping it around the spinning video drum, engaging the capstan and pinch roller and reel rotation. Check all the belts above and below the deck. Belts can appear to be firm but if they do not return immediately to their relaxed length when you stretch them 25%, they will need to be replaced. With the cover off, observe the behavior when you hit play. (You may need to put a piece of cardboard over the cassette to block external light from interfering with the start/end tape sensors). Assuming this is a basic VCR (no instant start features), you should see: 1. The video head drum begins to spin. 2. the roller guides move smoothly on the tracks, wind the tape around the drum, and stop snuggly pressed against the 'V-stopper' at the end of the tracks. 3. The pinch roller moves into position and presses the tape against the capstan. 4. The tape begins to move and is wound up by the takeup reel. 5. The picture and sound appear on the TV. With a 'rapid or quick start' (or it may be called something else) transport, the tape moves to a half-loaded position when the cassette is inserted. This is at an intermediate position partially pulled out of the cassette but not wrapped around the drum. On VCRs with a real-time counter and/or index search capabilities, the tape will be in contact with the control head. With an 'instant start' transport, the tape will fully load around the spinning drum when the cassette is inserted but the capstan will not engage and no tension will be applied to the tape until you press PLAY or REC. (After about 5 minutes, the drum will stop and it may unload to the half loaded or unloaded position.) Note that for VCRs with a real-time counter and/or index search capabilities, the tape must be in contact with the control head (but not the video heads) for all relevant modes. These VCRs (which include many modern units) must therefore pull the tape at least partly out of the cassette. In all cases, the completion of the sequence results in approximately the same mechanical configuration during PLAY. Several likely possibilities when it shuts down: 1. Everything occurs as above, picture and sound appear for a few seconds, but then the VCR unloads the tape, ejects the cassette, goes into REW mode, stops, or shuts off. Two common causes: The takeup reel does not turn and tape spills into the machine. This is sensed by the microcontroller which aborts record or play and attempts to save your valuable cassette. Most likely cause: old/dirty idler tire. As a test, turn the idler tire inside-out. The fresh surface will now work well enough to confirm this diagnosis and will continue working long enough for your replacement idler tire to arrive. See the section: "General guide to VCR cleaning and rubber parts replacement". The takeup reel is turning properly but
Posted on Nov 22, 2005
SOURCE: My VCR is playing too fast
try recording on a blank tape and setting the tape speed to SP (standard play). you should also see options for (LP-long play) and SLP (super long play). I think your machine is stuck on SLP option. if no-go, look for a manual on the web.
Posted on May 27, 2007
SOURCE: Mitsubishi vcr HS-U770
More likley it's not the little white thingy but the belt that drives it. Take the bottom off and get that broken belt out and runn down to the VCR / Tv repair shop and see if they have a new belt
Posted on Mar 07, 2008
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