Question about Sony SLV-940HF VCR

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FLICKERS AT START OF PLAY

INSIDE NOTICE THE SPINDLE MECH. ON RIGHT DOES NOT ADVANCE FAR ENOUGH. COUNTER DOES NOT WORK EITHER. A SLIGHT PRESSURE ON THIS ARE AND IT WORKS, ENGAGES.

IT IS LOOSER THAN ON THE LEFT ONE AS VIEWED FROM THE FRONT.

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  • BrentJuli963 Mar 10, 2009

    sony slv EZ725 - Records good clear picture - FastF looks good but flickers when normal play.

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Try putting a drop Lube oil or grease on the Right Guide arm path.

Posted on Sep 18, 2008

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Why does my Panasonic NV-SD200A play for 4 seconds then stops and has no kind of output?


General when the electronics detect a fault all functions will stop to prevent damage. Check inside look for broken plastic parts in the mechanism.

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Video tape gets stuck when playing


Did you also clean the rollers and other spindles where the tape also runs? It is not only the heads that will get 'sticky' & grab the tape.

Good luck.

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My VHS tape is also stuck--tapping didn't help


does ur vcr have a idler wheel or gears (between both spindles?) if its an idler wheel, with rubber band it commonly can go bad. their a pain. unfortunately there may not be a replacemant part. if nopt, inspect the belt for cracks or glazing. it needs friction to spin the spindle to take up the tape being played. or if ejecting, to wind the tape back in the cassete. take off the cover of vcr and watch. if the right side wheel of tape is not turning while playing, theres ur problem. the tape is instead floating every whichway. another possibility could be a belt on the right spindle. if any bands need replacing, use an ordinary rubber band ,. should work just as good

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1 Answer

940HF


If the rt guide arm is not moving fully forward, just put a couple of drops of white grease on the mechanism.

The arm with the felt pad is the autu-head cleaner pad. after a year or 2 of use, it will be more a menace than a good useful cleaner, as it will add the accumulated dirt on to the head, instead of cleaning. Just remove it.

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Goldstar GVR-DD1


Even the service manuals are pretty bad at helping with mech problems like this. You just have to be very mechanically inclined to figure it out. A lot of VCR mechs are very similar however so this is where experience helps. You do need to get the circuit board off however. Usually a few screws up from the bottom. Pretty smart huh! - put the least reliable parts (the belts) in the hardest place to get to. Look carefully for little broken plastic pieces. gear teeth etc. Since the motors work some of the time, they are not the problem. Could be the mode switches are out of time. They are a set of switch contacts buried in the mech which tell the brain what position the mech is in. Move the load motor by hand (I use a 5V power supply with a fwd/rev switch so I can run it back and forth and watch the action.
Goldstars are good mechs. They make a ton of them and pretty well get the design bugs out, but of course those little plastic parts break easily.
Hope Ya Fix It.

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SSV6003 VCR Question


Your VCR has a problem in the mechanism. Being so new the usual rubber belt problems are not likely. Possibly a foreign object inside or something bent. Because it will sometimes play, it is more likely to be some slight problem which will need expert service.

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Magnavox msd804 vcr/dvd combo


I think what you are referring to is the pinch roller. This roller sits at the right side of the mechanism, and in play mode, presses the tape up against the capstan shaft. These pull the tape through the machine at a precise regulated speed. If the roller isn't being engaged or the capstan isn't turning, then these conditions need to be corrected. Does the capstan turn freely? How about the noted roller? Perhaps lubricant has dried/hardened/gotten sticky...

There is electronic circuitry for the capstan motor (a direct drive type motor integrated on the underneath side. Something could be awry with this circuitry.

There is a drive clutch mechanism which could also be defective. This drive clutch assembly sits in between & swivels between the supply and takeup spindle, depending on whether VCR is in Play/FFWD or REW. In the Play/FFWD, it is engaging the right spindle (takeup) and in REW the left spindle (supply). If this is what you are describing, perhaps this clutch unit needs replacement or the grease at its pivot is hardened/sticky.

Most VCRs of the last 10+ years don't use a rubber tired drive (very common on late '80s VCRs), rather a gear toothed drive.

Beyond a simple mechanical problem, repair might not be economical feasible. Most VCRs of the last 10+ years are poor quality, disposable, unlike the machines of the '80s and early '90s, which were built like tanks comparitively speaking.

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Tape won't load.


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. 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 one of the reel The takeup reel is turning properly but one of the reel rotation sensors or its electronics is defective. As a test, check to see if the tape counter is changing at any time during the loading and

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3 Answers

The unit will fast forward and rewind, but won't play


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

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