Sony Bvh-3100 Service Manual
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SONY BVH-3100PS i9000 VOLUME 1 Services Guide This service manual consists of complete details included in original factory maintenance manual We assure that our manual contains routine diagrams. Pokiri telugu audio songs download. Assistance manuals generally include imprinted circuit boards, block blueprints, exploded views, assembly guidelines and components record.
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Hi there everybody. I've submitted a couple of issue on another 'bovine' forum I didn't got any response. So I actually hope somebody will become able to assist me right here.
I would like to calibrate/align a Sóny BVH-2000. In the manual, Sony make use of the whitened area of the alignment recording (monitoring for example). I put on't have the sony alignment record, but a 'multi-purpose reference video tape for Type M' from Ampéx, which doésn't have got a white section. Is certainly there a section that I can make use of instead of the whitened sign?
On the Ampex video tape, there's: Colour Pubs/Ramp Matrix, dark, Multiburst, Mod.Ramp, Pulse Pub, Programmed Dropouts, Red Field, Multipulse. If I really require the Sony Recording, does someone have a single accessible, or can make me a copy? About positioning tapes in general: the Sony position tape can be slit slightly wider than regular tape share, which is usually to state, an alignment record is specifically one in . wide. Documenting stock will be actually slit slightly narrower.
This is very important for proper tape route alignment, specifically the entry and get out of instructions. Because of thát, and because án alignment recording is documented on specifically calibrated recorders, á dub of án alignment recording is the next factor to worthless. If you're placing up á BVH-2000, the 1st issue you should do is definitely the servo setup. Among various other points, this contains fishing reel torque calibration and sensor arm rest adjustment. This not really just interacts with entry and get away guide position, a stress issue will damage your alignment video tape. You will need a digital meter, oscilloscope (ideally four search for), a complete one-hour fishing reel of record, and the collection of calibration dumbbells.
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As soon as the servos are usually lined up, you should furthermore check the eccentricity of the upper drum to create sure it's properly concentrated on the spindle. The tolerance is incredibly small for this - less than one micron. Don't consider to perform this, or to change the higher drum, without the eccentricity measure and tapered set up screws: you will really likely wind flow up having an out-óf-center drum seIf-destruct on oné of the céramic guide flanges. Right now clean the entire tape path. Pure isopropyl alcohol should end up being adequate; if you possess a persistent bit of oxide on a steel guideline or tip, you can use xylene moderately - after that clean it off with alcohol. Make sure everything is dry before threading up any tape. Flip the 'record inhibit change' before threading the alignment recording.
Have fun with the 1st area of the recording with the monitoring button in the pushed-in, regular setting, with the Ur/P mind selected. Appear at the front advantage of the RL-12 board: you should find four natural LEDs lighted. On the handle -panel, the CF Locking mechanism light should be on, and the servo caution light should be away. If this will be what you get, the servo system is behaving correctly and you should be capable to keep on with the positioning. Otherwise, some diagnostic work is definitely in order to find out what'h producing the servos disappointed.
Once everything's happen to be established up mechanically ánd the servos are aligned, then you check out the guideline alignment. You are looking to get a toned RF envelope over the whole sweep of the mind (select the Ur/P mind, not really the powerful tracking play mind). The top general RF should occur when the tracking knob is certainly concentrated, and should not really modify with it'h pushed into its default environment. If it will, you shift the fixed head assembly slightly side-to-side to get the RF peak with the tracking knob moved in.
Expand the RF display to appear carefully at the start and finish of the cover. You should discover a nearly square rise and fall, without a great deal of waviness across the top. If you pull out the monitoring knob and change it side-tó-side, the beginning and finishing edges of the envelope should rise and drop with the sleep of the rest of the cover.
If the increase or fall time is usually really ratty, or doesn'capital t match up up with the sleep of the cover, you're going to require to alter the entry and/or leave manuals. This will be insanely touchy, and will quickly kill your higher drum unless you understand what you are doing. Various other college students in my course maintained to do precisely this, to the excellent displeasure of the instructor. If you expand the RF screen so that it centres on the overlap period (the portion of the drum's rotation where the major L/P mind tip will be between the get out of and entry guides, and not really in get in touch with with the recording), you should notice something Iike this: Sony spécifies the whitened section of the tape for the path alignment, mainly because white corresponds to thé highest RF company regularity, and a solid full-field sign will produce a constant RF cover over the entire check of the drum.
Even though video is recorded as an FM sign and consequently should possess a constant amplitude irrespective of the movie level, real-world variations in RF regularity response for whatever cause will produce somewhat differing RF amounts that correlate to the video clip level. If you put on't have got a strong white industry on your cassette, you can still come quite close, specifically if the check pattern can be consistent vertically (full-field color bars instead of SMPTE pubs, for instance). The red industry would end up being a good applicant, if it operates long plenty of. Ultimately, once you get through all óf this, your device should end up being capable to record and play regular recordings. The powerful tracking positioning is quite specialized, and the process in the manual doesn't work really well - you can send out the whole point off the deep end very simply. Unless you require to do variable rate playback, I'd depart it by yourself. This was one of the areas where it had been really helpful to spend the two days in San Jose.
Ideally this will provide you a good begin, and steer you away from the greatest barriers. The authentic poster asked me via message whether this position can end up being carried out without the tapered anchoring screws, or if that's a deal-bréaker. For the benefit of anyone who comes upon this line later, I'll blog post the reply here, as well. Also, I valued a small stage about reassembly that I did not remember in the immediate message remedy.
I probably shouldn't state that it can't end up being performed, but it will be exceedingly challenging. If you verify the drum éccentricity and it remains within +/- half a micron or so, that's fine - you wear't have to worry about it. If the higher drum had been installed correctly, this should be the situation.
In general, when you change the higher drum, you get rid of the decorative cover up and the coppér-plated amplifier assembly; the drum is usually fixed to the spindIe with two aIlen-head cover screws. Make a cautious notice of how the internal circuit panel on the spindle outlines up with the external circuit table on the drum, so that when you place the fresh drum on, you obtain it the correct method around (there'h a 50-50 chance of getting it wrong). Remove the old drum, and cautiously fixed the fresh drum on the spindle. Use the tapered anchoring screws to originally secure the higher drum to thé spindle. The tapér functions to middle up the drum; just get them finger tight. After that, one at a time, replace each tapered mess with the allen-head cap screw, getting careful not really to topple the drum out of position. Only tighten the cap screws partway, therefore that they're also keeping the drum in location, but not really completely torqued down.
lnstall the eccentricity measure (create certain it'beds operating the higher component of the drum, and can be not in line with the head guidelines). Usually, you will discover something like +/- 20 microns of mistake as you move the drum around the group. Lightly press the inner surface area of the drum, apart from the measure, and see which path the needle moves. Rotate the drum therefore that it provides the maximum error in the reverse direction, then lightly tap the inner component of thé drum opposite thé measure to bring the error lower. Rotate the drum once again, and find the spot with the maximum mistake, and tap some even more. Maintain at it untiI you can move the drum and proceed the hook much less than one tick tag (. NECRAT wrote:Wé shotgunned all thé caps.
That's a great deal of caps! Réminds me of repairing an previous Datatek 20x10 routing switcher (circa past due 1970s). All of the input and result amplifiers and every crosspoint acquired damp tantalum caps - aIl of which experienced to end up being replaced. Required me various weeks - of training course, there had been the constant distractions to do live photos and fix equipment that the 'talent' held breaking. We still have many BVH-2000s (two operating, various for parts), but apart from cleaning them, they haven't required maintenance attention in quite a even though. They only get terminated up when somebody desires a item of store footage, which can make me unfortunate until I keep in mind the cost of a brand-new top drum. The last time I dubbed a record, it received people from around the developing who had never noticed a reel-tó-reel VTR operating before.
Unfortunately, some of them had been operators who attempted to encourage me that the machine didn't work, and that l couldn't make it function. Incorrect on both counts. The combination of two days of Sony training college plus various decades of maintaining a bunch of BVH-2000 and -2500 devices (four at our place, plus a lot at some other channels and manufacturing houses) makes for rather potent encounter. There's a higher drum new accessible on eBay, 17,682$.
Better substitute I believe, AheadTeK, they possess refurbished upper drum for aróund 2300$. For the touch roller, thére's Térry's Pinch Roller who can refurb the roller if I deliver it tó him (around 55$).
But presently there's another, even more costly alternative (200$), from Athan Corp, who possess new nip roller made with a proprietary polyurethane materials (and furthermore new bearings). I'michael not sure what to do, I know that Terry do a great job for the alternative of the 'silicone', but I desire to end up being sure that the bearings are usually also top shape. Atakama wrote:There's a upper drum fresh obtainable on eBay, 17,682$.
Better choice I believe, AheadTeK, they have refurbished higher drum for aróund 2300$. Those are usually two quite different points. The unit you see on eBay is the complete assembly that contains the lower drum (the electric motor, rotary transformers, fixed slant tutorial), the top drum (the spinning part with the mind guidelines), sliprings and brushes (which offer energy for the preamp and dynamic tracking piezo assembly).
It's pretty very much everything except fór the preamp ánd the decorative cover up. The AheadTek device is usually a utilized higher drum that provides typically ended up refined to get rid of scratches, fresh head suggestions added or older tips altered outward, and re-balanced. A brand new top drum usually offers about 90-100 microns of suggestion projection on the Ur/P and play brains; when they wear down to abóut 50 microns, you begin having problems sustaining head-to-tape contact especially approaching the overlap time period between the guides. Replacing an upper drum is certainly a pretty skilled job that extremely often needs only minimal readjustment. Replacing the lower drum can be much even more challenging, and consists of nearly overall mechanical tape path position and servo alignment.
There are usually just a few factors to substitute a Iower drum: 1) The motor or its linked sensors provides was unable (extremely uncommon); 2) A rotary transformer has neglected (really rare); 3) A helicopter crashed and damaged the VTR (really uncommon). 4) The slant guidebook has used to the stage where the RF package in the middle of the check out is significantly different from the sleep of the package, looking like the ság in an outdated bed mattress.
My knowledge is certainly that a Iower drum will outIast about half á dozen higher drums (presuming normal put on, not accidental damage). In any situation, you really should question whether the higher drum really needs substitute. If you calculate the tip projection and get more than 50-60 microns, there's most likely more helpful life staying. In our store, we would get about 5,000 hours on an top drum; that's roughly 125 hrs per micron. Therefore actually a nicely used head with 65 microns can be still most likely good for nearly 1,000 hours. For the nip roller, thére's Térry's Touch Roller who can refurb the roller if I send it tó him (around 55$).
But there's another, more costly substitute (200$), from Athan Corp, who have got new crunch roller produced with a proprietary polyurethane material (and also brand-new bearings). I'meters not sure what to do, I understand that Terry do a excellent work for the replacement of the 'plastic', but I need to end up being sure that the bearings are usually also top form. There are several sets of bearings that affect tape path efficiency to differing levels: the crunch roller, the timér roller, and several roller instructions.
It'beds pretty uncommon that they obtain bad good enough to result in troubles, and you can inform easily by just re-writing the roller. If it makes a chattering sound or if the roller hangs up in one spot, they require to become replaced. Primarily, I would attempt simply giving the rollers a great cleanup with isopropyl alcoholic beverages. That's even even more essential for the timér roller: if thát moves, the servo can get confused about what the cassette is performing, with significantly bad results. I certainly not did question: does this machine work today? NECRAT wrote:Took our engineer about three weeks per device.
We may have delivered the 2nd machine's planks out to Specification Comm to do the job. Well, that provides me beat. At one stage we bought a utilized BVH-2500 (it's a BVH-2000 with a powerful tracking component on the report head, so that it can report a individual field of video clip also when the video tape isn't shifting). This particular machine had been one of abóut a dozen thát had been produced with an analog track control system for the record mind, which had been never awfully steady and required constant recalibration.
Sony Bvh-3100 Service Manual
Sony redesigned the point almost instantly to use a digital control program. But we had been stuck with the previous analog edition.
If I remember best, the machine was serial number 10007 (the seventh one particular built); I nevertheless possess the handle screen: This had been the very very first one out the door. We used it for about a 12 months (it defeat doing computer animation by hours of one-framé edits on thé 2000), but when we obtained computer products that could make full animations internally instead than recording a body at a period to tape, I took the device down to the bare frame, reconstructing it as á BVH-2000 with a mix of boards and major elements from our oIdest 2000, with fresh heads, manuals, and various other wear items.
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That has been a fun task (okay, I have a twisted idea of enjoyment), and had taken me about two weeks to finish. There'beds a part of me that feels bad today about getting ruined a classic 2500, but at the period we actually needed a dependable device, and we wéren't about tó spend another $75,000 for a new machine. And didn'testosterone levels really would like to possess one BVH-3100 in a store with three additional 2000s. The upside is definitely, I have a great deal of extra parts to keep our remaining machines working! NECRAT wrote:But how frequently do you use it?
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We've longer since got rid of of all our 1' gear. We possess a couple of Beta products, and maybe 1 3/4' porch around, gathering dust.
DVCPro is even barely touched any more. It'beds not awfully frequent that we require 1' nowadays, but we perform occasionally require to manage archived material. We nevertheless possess the ability to play 1', Beta, U-matic, and DVC-Pro; if I required to, I could open fire up one óf the TP66s to exchange film quite rapidly. Our information department enjoys being capable to use old footage when it's related, and since we're interconnected directly with five some other channels, we require to offer with content material from a great deal of different sources. Besides, we still have exhibits and films under agreement on 1' and 3/4' recording (Small Home on the Prairie, anyone?).