ZinParts: Replacement belts and other parts for broadcast, professional and vintage VTRs and VCRs

Zin! VTR Works has parts available for a number of common VCRs, such as these high-quality replacements for Sony 3/4″ Umatic recorders:


ZIN-ZinPart-Z-3-672-737-01-Sony BVU-VO Loading Ring Belt-Replaces Replaces Sony Part 3-672-737-01 on Sony BVU-950,  VO-98xx, 96xx, 50XX, VP-7640, 7240 and others
ZIN-ZinPart-Z-3-672-737-01-Sony BVU-VO Loading Ring Belt-Replaces Sony Part 3-


Replaces Sony Part 3-672-737-01

For Sony BVU-950, 900, 920, VO-98xx, 96xx, 50XX, VP-7640, 7240 and others

$10.00 plus any applicable tax and shipping


ZIN-ZinPart-Z-3-653-387-00-Sony BVU-VO-Cassette Elevator Belt-IMG_9777
Replaces Sony Part 3-672-737-01 Sony BVU-950, VO-98xx, 96xx, 50XX, VP-7640, 7240 and others


Replaces Sony Part 3-653-387-00

For Sony BVU-950, 900, 920,  VO-98xx, 96xx, 50XX, VP-7640, 7240 and others

$10.00 plus any applicable tax and shipping


ZIN-ZinPart-VO-FF-REW-TIRE replaces Sony-VO-Series Fast forward / Rewind tre


For Sony VO-series and VP-series 3/4″ Umatic recorders and players.

$10.00 plus any applicable tax and shipping


ZIN-ZinPart-Z-3-668-785-00, ONE FF/REW BELT Replaces Sony Part 3-668-785-00
ZIN-ZinPart-Z-3-668-785-00, ONE FF/REW BELT Replaces Sony Part 3-668-785-00 for Sony VO Series inc. VO-98xx, 96xx, 50XX, VP-7640, 7240, others


Replaces Sony Part 3-668-785-00

For Sony VO Series including  VO-98xx, 96xx, 50XX, VP-7640, 7240, others

This ROUND belt avoids the twisting problem square belts have over time, becoming twisted, and stressed as a result, which leads to failure.

These round belts from Zin! VTR Works have been installed in heavy-use environments for more than a year with no replacements required.

$10.00 plus any applicable tax and shipping

ZIN-ZinPart-Z 3-718-758-01

ZIN-ZinPart-Z 3-718-758-01-ONE AIR DAMPER  FOR Sony BVU-950, ALSO FITS  VO-98xx, 96xx, 50XX, VP-7640, 7240 and others
ZIN-ZinPart-Z 3-718-758-01-ONE AIR DAMPER FOR Sony BVU-950, ALSO FITS VO-98xx, 96xx, 50XX, VP-7640, 7240 and others

ONE AIR DAMPER  FOR Sony BVU-950, ALSO FITS  VO-98xx, 96xx, 50XX, VP-7640, 7240 and others

ZIN-ZinPart-Z 3-718-758-01-Air Damper-010

The Air Damper improves flutter performance.  Replace missing Air Dampers on your BVU-900, 920 or 950, or add it to units that never had the air damper’s benefits like the Sony VO-98xx, 96xx, 50XX, VP-7640, 7240 and other Sony 3/4″ Umatic VCRs.

Slides on.

$18.00  plus any applicable tax and shipping.

We’ll be adding pictures and more items to this page and shortly, and will have items available for sale through the new Online flashscan8.us Moving Image Tools and Technology Store! So, bookmark this page or contact us using the link below and ask to be notified when the MIT&T Store goes on-line.

Zin! VTR Works has recently supplied a brand-new replacement motor for original equipment on an Ampex AVR-3 Quad VTR.

Pinch Rollers:

We can supply other parts including Pinch Rollers for various machines.

We’re taking orders now for a new batch of replacement Ampex Quad pinch rollers, made to Ampex specifications including durometer (hardness/softness) of the rubber.

We’re also able to supply replacements for Sony 3/4″ pinch rollers, which are becoming or have become unobtanium from Sony and other distributors.

Use the Contact Page link below and tell us what machines you need Pinch Rollers for in the “What other product needs do you have?” box.
 How are your Pinch Rollers doing?

Quick Roller Condition test:

If you take your thumbnail and push into the rubber of the roller, it should go in, but when you pull your thumbnail away the indentation should disappear.

If it doesn’t disappear, the rubber is too soft. If you can’t make an indentation, it’s too hard.

How will ZinRollers be different from what else you may find?  Ken advises:

These would be of the proper durometer so that the tape can make a slight depression in the rubber.

That allows the roller to contact the capstan shaft above and below the tape so that the tape is moved by the pinch roller contacting the back side of the tape… rather than the capstan shaft driving the recorded surface of the tape as happens when the roller is too hard.

Correct durometer as noted above helps avoid tape slippage and video errors, increased capstan roller pressure, additional wear on bearings, etc.

These replacement rollers would be ground to final specifications with new bearings installed, so that the results are concentric and the correct diameter so you won’t have issues with flutter or speed.

These rubber rollers stay cleaner longer than replacements made from materials such as polyurethane that may be available.  Ken tried polyurethane rollers in customers machines (in one case, a large duplication facility) and heard complaints that operators were having to stop work to clean the poly rollers about every fourth tape. Not good, especially on cassette-based units.

Ken supplied and installed rubber pinch rollers, which resolved the problem and gave significantly longer times between the need to clean the rollers.

As you may know, Polyurethane is used to make Particle Transfer Rollers (PTRs) used on film transfer equipment to do exactly that… transfer particulate matter like dust off the film and onto the roller. We sell those for use with film scanners.

New video heads or assemblies may be available from some manufacturers.

flashscan8.us is also an authorized representative for Videomagnetics, which is the world’s last rebuilder of 2″ Quad VTR head assemblies, and supplies refurbished upper drums and scanners for a range of broadcast 1″, 3/4″, Betacam/BetacamSP/Digital Betacam and Panasonic DVCPro recorders.

For more information or to order, click on our Sales Agent’s Contact Page and let us know how to reach you and what parts you’re specifically interested in.

Contact us for Service, Parts and Consultation on Videotape Recorder Modifications and Videotape Migration Systems.

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Sales and Marketing for Zin VTR Works
CEO: Ted Langdell
(530) 301-2931  ted@ZinVTRWorks.com

Going to extra-ordinary lengths…

In mid-December, Chief Marketing Officer Ted Langdell drove 400 miles from Northern California to Los Angeles to pick up equipment for Zinspection that an Eastern US customer bought at an auction when a film and video company closed.

Ampex VR-7800
Ampex VR-7800 that Ken built a custom wooden top for when he refurbished this machine in the mid-2000s for a Los Angeles film and video restoration company

Among the five vintage video recorders was a late 1960s Ampex VR-7800 1″ VTR that Ken Zin had refurbished for the now-closed company ten or so years ago.

Colleague Al Sturm built an interface box to allow the VR-7800 to be used with a 1986-era digital time base corrector.

The Eastern customer needed the machine inspected, repaired to working condition if needed, and shipped to them ASAP.

VR-7800 Playback
Playback of a VR-7800 test recording after Zinspection and adjustments — with Textronix 1780R Test Set

Ken’s inspection revealed the machine to be working. He thoroughly cleaned, tested functions, made adjustments to improve the playback quality.

Once satisfied that the machine was ready to ship, Ken built a crate for safe shipping.

Ted and Ken crated the VTR, boxed up the associated TBC and interface.

VR-7800 ready to ship by FedEx Heavyweight Air

Here’s the ZinCrate with VR-7800, Ampex TBC-6 and custom interface box strapped on tope and ready to ship to our Eastern customer from the FedEx Heavyweight Air terminal in Sacramento

Ted worked with the customer’s logistics department to get the items shipped via FedEx Express Freight, and drove the items 90 miles from the Zin! VTRWorks lab in Magalia (near Paradise east of Chico) to Sacramento on Christmas Eve in time to make a plane for next day delivery.

The boxes were pallet-wrapped to the crate for safety and protection, and then strapped to the crate. “We wanted to make sure all three items arrived at the same time, so our customer could set up and go right to work,” Langdell says.

The customer got the machine the morning after Christmas, and was able to have a batch of tapes converted to files, QC’d and delivered to its customer before New Years Eve, which was the deadline for them to complete the job.

ZinFurbishing an Ampex AVR-2: What Ken found

Ken has been working on Ampex AVR-2 Serial #197, which began life as one of a pair of machines at KRBK-TV, Sacramento, California.

Seen here at time of pickup, this third-generation Ampex Quad is in need of some TLC, which it is getting now.

# 197 is undergoing a thorough ZinFurbishment.

Crazy waveforms from AVR-2 at first power-upThat’s designed to identify and correct problems that make “fun” vector and waveform paDSC_2303tterns like those seen here…

Leaky capacitor on AVR-2 board

The ZinFurbishment will replace quite a few capacitors, such as the one on this board that leaked, destroyed its lead and trace on the board,


Crispy connectors
Poorly crimped connectors heated up due to resistance, and got crispy.

It will also  fix “crispy” power connections such as on the rectifiers seen here, caused by poorly crimped connectors.

Ampex issued a field bulletin advising to solder directly to the lug on the rectifier or other part, such as transformers.

The system did power up, but there were quite a few power supply related issues to be addressed. 

Fuseholder added
A fuseholder was put in circuit with circuit breakers instead of fixing cause of breaker trips.

Apparently, previous owners or engineers chose to “band-aid” some faults rather than fix them… like put a fuse in circuit with a circuit breaker because what was found to be a poorly crimped connection wouldn’t support the current requirements of the circuit.

3M RF tap
3M RF tap for external TBC added to back of AVR-2. Will be removed

Rather than deal with a problem involving part of the TBC, a workaround involving a 3M dropout compensator RF tap was installed.


(Heads were being scratched while contemplating “Why’d they do THAT?”)

Broken wire on connector
Broken wire on connector caused transport problem dangerous to tape

A wire break found on one of the transport harness plugs was responsible for no rewind capability.





A lot of small and large things have been discovered and fixed as the process of problem finding, identification and elimination continues.


AVR-2 electronics cage
AVR-2 electronics cage needs a lot of air to keep things cool. Only three of the six muffin fans under the cage were installed. And only two worked.

Instead of the factory complement of six muffin fans under the machine blowing air up into the electronics chassis, only three were found, and one of those was frozen… didn’t move.

That means the heat generated by the electronics wasn’t being removed, and could be the cause of overheated components, malfunctions and shorter time between failures.

People wonder why the cost of bringing back VTRs and VCRs can be expensive. These things are why. It can be a very time-consuming process, and time is money.

The basic electronic and mechanical issues need to be addressed before any “fine tuning” and finishing work can be done.

Once those items are addressed, we can see what to do about cosmetics, like worn paint and button legends.

AVR-2 control panel

The good news includes two Ampex Extender Cards for the electronics chassis (needed to do adjustments where circuits on several cards interact) and an audio preamp extender.

The head spun up fine and has good life… as tested on another VTR.

All in all, we expect to see this AVR-2 transferring tape reliably very soon for new users.