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Stationary control-head in Video 8 mechanism ?
Hello folks,
I stupidly played on old tape on my SONY CCD-F355E camcorder which left probably some residue on the control-head since tracking has worsen and detection of tape-speed has been failing ever since. I once had the same problem with a very old CCD-V8AF where I simply cleaned the control-head and the problem would vanish but on the newer model I cannot find one, where does stationary control-head hide, is it integrated in the stationary part of the drum-assembly ?? Or was there never one in Video 8 systems ? thanks, Adrian |
Video8 systems do not have control heads. The stationary head on the CCD-V8 was a full track
erase head. After this, pretty much all went to flying erase heads, on the cylinder. You likely need to simply clean the video heads. -- Stephen Sank, Owner & Ribbon Mic Restorer Talking Dog Transducer Company http://stephensank.com 5517 Carmelita Drive N.E. Albuquerque, New Mexico [87111] 505-332-0336 Auth. Nakamichi & McIntosh servicer Payments preferred through Paypal.com "Adrian G." wrote in message om... Hello folks, I stupidly played on old tape on my SONY CCD-F355E camcorder which left probably some residue on the control-head since tracking has worsen and detection of tape-speed has been failing ever since. I once had the same problem with a very old CCD-V8AF where I simply cleaned the control-head and the problem would vanish but on the newer model I cannot find one, where does stationary control-head hide, is it integrated in the stationary part of the drum-assembly ?? Or was there never one in Video 8 systems ? thanks, Adrian |
Hello Stephen,
that's what I anticipated :( Well I have cleaned the video-head several times with Isopropyl, but tracking problems remain. Either it's an Hi-ESR problem now or I missed something. How does tracking and speed-detection work on Video8 without any control head, there must be something to detect tape-speed, isn't there ?? Regards, Adrian |
The ATF, auto-track-find, servo does both the tracking and speed detect. If you have lines of
static in the picture, one or both tape guides have drifted out of place(due to thermal changes loosening the set screws), which would screw up speed detection if it was far enough off. If you have unpatterned static through the picture, your heads ain't clean enough yet. Isopropyl is pretty poor for head cleaning. MEK, methyl ethyl ketone, works best, without endangering the head coils or anything else(except your liver, if you sit around huffing the stuff). Once you are positive that the heads are quite clean, then it may be physically leaking surface mount electrolytic caps in the head amp causing the problem. -- Stephen Sank, Owner & Ribbon Mic Restorer Talking Dog Transducer Company http://stephensank.com 5517 Carmelita Drive N.E. Albuquerque, New Mexico [87111] 505-332-0336 Auth. Nakamichi & McIntosh servicer Payments preferred through Paypal.com "adrian82" wrote in message ups.com... Hello Stephen, that's what I anticipated :( Well I have cleaned the video-head several times with Isopropyl, but tracking problems remain. Either it's an Hi-ESR problem now or I missed something. How does tracking and speed-detection work on Video8 without any control head, there must be something to detect tape-speed, isn't there ?? Regards, Adrian |
Listen to what the other guys said: Isopropyl alcohol won't dissolve tape
residue...MEK, etc, will, but will also dissolve paint and almost any plastic except nylon. All speed and phase tracking on V8 is done by analyzing video head output. The early Sony shop manuals have a very good description. Hello Stephen, that's what I anticipated :( Well I have cleaned the video-head several times with Isopropyl, but tracking problems remain. Either it's an Hi-ESR problem now or I missed something. How does tracking and speed-detection work on Video8 without any control head, there must be something to detect tape-speed, isn't there ?? Regards, Adrian webpa |
MEK actually dissolves a very limited spectrum of enamels, but does indeed attack styrene
plastics. But all of the tape contact parts are either metal or nylon, so no worries. You just have to use a small amount of caution not to spill any on the cosmetic parts of the unit that are styrene. My favorite thing about MEK, though, is how it works on pinch rollers, since it very effectively removes not only the deposits, but also the oxidised layer of rubber, leaving pristine the good rubber underneath. -- Stephen Sank, Owner & Ribbon Mic Restorer Talking Dog Transducer Company http://stephensank.com 5517 Carmelita Drive N.E. Albuquerque, New Mexico [87111] 505-332-0336 Auth. Nakamichi & McIntosh servicer Payments preferred through Paypal.com "WEBPA" wrote in message ... Listen to what the other guys said: Isopropyl alcohol won't dissolve tape residue...MEK, etc, will, but will also dissolve paint and almost any plastic except nylon. All speed and phase tracking on V8 is done by analyzing video head output. The early Sony shop manuals have a very good description. Hello Stephen, that's what I anticipated :( Well I have cleaned the video-head several times with Isopropyl, but tracking problems remain. Either it's an Hi-ESR problem now or I missed something. How does tracking and speed-detection work on Video8 without any control head, there must be something to detect tape-speed, isn't there ?? Regards, Adrian webpa |
Hello Stephen
Stephen Sank wrote: The ATF, auto-track-find, servo does both the tracking and speed detect. If you have lines of static in the picture, one or both tape guides have drifted out of place(due to thermal changes loosening the set screws), which would screw up speed detection if it was far enough off. Well there aren't any lines in the picture, but detection of speed does not work, i.e. tape will always be played in LP even if recorded in SP. When I playback an LP, picture is a little instable and video sometimes drops out periodically. But when I record a tape and playback on a known-good camcorder, both SP and LP recordings are perfect in picture and sound. So what's the matter with it ? regards, Adrian |
Now it's starting to sound like your camcorder is starting to have electrolytic caps failing.
The fact that you get something like a good picture on LP just about clinches it. -- Stephen Sank, Owner & Ribbon Mic Restorer Talking Dog Transducer Company http://stephensank.com 5517 Carmelita Drive N.E. Albuquerque, New Mexico [87111] 505-332-0336 Auth. Nakamichi & McIntosh servicer Payments preferred through Paypal.com "adrian82" wrote in message oups.com... Hello Stephen Stephen Sank wrote: The ATF, auto-track-find, servo does both the tracking and speed detect. If you have lines of static in the picture, one or both tape guides have drifted out of place(due to thermal changes loosening the set screws), which would screw up speed detection if it was far enough off. Well there aren't any lines in the picture, but detection of speed does not work, i.e. tape will always be played in LP even if recorded in SP. When I playback an LP, picture is a little instable and video sometimes drops out periodically. But when I record a tape and playback on a known-good camcorder, both SP and LP recordings are perfect in picture and sound. So what's the matter with it ? regards, Adrian |
Ever looked at a video headwheel, or the heads themselves, with a microscope or
very strong lens? The heads consist of chips of a very high density ferrite with or a very few turns of very, very fine wire wrapped through a hole. The insulation on this wire MIGHT be nylon, or it might be something MEK does attack. I'm adverse to experiments of this kind. p a w e b e r @ a o l . c o m MEK actually dissolves a very limited spectrum of enamels, but does indeed attack styrene plastics. But all of the tape contact parts are either metal or nylon, so no worries. You just have to use a small amount of caution not to spill any on the cosmetic parts of the unit that are styrene. My favorite thing about MEK, though, is how it works on pinch rollers, since it very effectively removes not only the deposits, but also the oxidised layer of rubber, leaving pristine the good rubber underneath. -- Stephen Sank, Owner & Ribbon Mic Restorer Talking Dog Transducer Company http://stephensank.com 5517 Carmelita Drive N.E. Albuquerque, New Mexico [87111] 505-332-0336 Auth. Nakamichi & McIntosh servicer Payments preferred through Paypal.com "WEBPA" wrote in message ... Listen to what the other guys said: Isopropyl alcohol won't dissolve tape residue...MEK, etc, will, but will also dissolve paint and almost any plastic except nylon. All speed and phase tracking on V8 is done by analyzing video head output. The early Sony shop manuals have a very good description. Hello Stephen, that's what I anticipated :( Well I have cleaned the video-head several times with Isopropyl, but tracking problems remain. Either it's an Hi-ESR problem now or I missed something. How does tracking and speed-detection work on Video8 without any control head, there must be something to detect tape-speed, isn't there ?? Regards, Adrian webpa |
MEK absolutely does NOT attack any form of the enamels used to insulate the head coils. Even
if nylon enamel was used, I already stated that MEK does not attack nylon at all. And I'd hardly call it an "experiment" after the 20 years I've been using MEK on all manner of audio, video & DAT heads. -- Stephen Sank, Owner & Ribbon Mic Restorer Talking Dog Transducer Company http://stephensank.com 5517 Carmelita Drive N.E. Albuquerque, New Mexico [87111] 505-332-0336 Auth. Nakamichi & McIntosh servicer Payments preferred through Paypal.com "Paweber02" wrote in message ... Ever looked at a video headwheel, or the heads themselves, with a microscope or very strong lens? The heads consist of chips of a very high density ferrite with or a very few turns of very, very fine wire wrapped through a hole. The insulation on this wire MIGHT be nylon, or it might be something MEK does attack. I'm adverse to experiments of this kind. p a w e b e r @ a o l . c o m MEK actually dissolves a very limited spectrum of enamels, but does indeed attack styrene plastics. But all of the tape contact parts are either metal or nylon, so no worries. You just have to use a small amount of caution not to spill any on the cosmetic parts of the unit that are styrene. My favorite thing about MEK, though, is how it works on pinch rollers, since it very effectively removes not only the deposits, but also the oxidised layer of rubber, leaving pristine the good rubber underneath. -- Stephen Sank, Owner & Ribbon Mic Restorer Talking Dog Transducer Company http://stephensank.com 5517 Carmelita Drive N.E. Albuquerque, New Mexico [87111] 505-332-0336 Auth. Nakamichi & McIntosh servicer Payments preferred through Paypal.com "WEBPA" wrote in message ... Listen to what the other guys said: Isopropyl alcohol won't dissolve tape residue...MEK, etc, will, but will also dissolve paint and almost any plastic except nylon. All speed and phase tracking on V8 is done by analyzing video head output. The early Sony shop manuals have a very good description. Hello Stephen, that's what I anticipated :( Well I have cleaned the video-head several times with Isopropyl, but tracking problems remain. Either it's an Hi-ESR problem now or I missed something. How does tracking and speed-detection work on Video8 without any control head, there must be something to detect tape-speed, isn't there ?? Regards, Adrian webpa |
MEK is ??????? On Fri, 14 Jan 2005 18:24:38 -0700, "Stephen Sank" wrote: MEK absolutely does NOT attack any form of the enamels used to insulate the head coils. Even if nylon enamel was used, I already stated that MEK does not attack nylon at all. And I'd hardly call it an "experiment" after the 20 years I've been using MEK on all manner of audio, video & DAT heads. |
Methyl Ethyl Ketone, a common solvent sold by almost any paint supplier.
-- Stephen Sank, Owner & Ribbon Mic Restorer Talking Dog Transducer Company http://stephensank.com 5517 Carmelita Drive N.E. Albuquerque, New Mexico [87111] 505-332-0336 Auth. Nakamichi & McIntosh servicer Payments preferred through Paypal.com "Mirko S Veselinovic" wrote in message ... MEK is ??????? On Fri, 14 Jan 2005 18:24:38 -0700, "Stephen Sank" wrote: MEK absolutely does NOT attack any form of the enamels used to insulate the head coils. Even if nylon enamel was used, I already stated that MEK does not attack nylon at all. And I'd hardly call it an "experiment" after the 20 years I've been using MEK on all manner of audio, video & DAT heads. |
"Stephen Sank" bravely wrote to "All" (17 Jan 05 21:36:42)
--- on the heady topic of " Stationary control-head in Video 8 mechanism ?" SS From: "Stephen Sank" SS Xref: aeinews sci.electronics.repair:7571 SS Methyl Ethyl Ketone, a common solvent sold by almost any paint SS supplier. Maybe not ever locality because many people have become environmental freaks and anything chemical sounding is hard to find on store shelves anymore. Idiots sell welding flux (hydrochloric acid) in full reach... Shhhhh...! A*s*i*m*o*v .... Puddy-tat's not so bwave in Gwanny's microwave! |
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