Teac X7R and other X7 models Fast Wind Speed Fix Modification

One of the most aggravating things is to fast wind a X7R and have to wait the 2.5 to 3 minutes to have it finish a 1800 foot roll of tape.  Ha! Teac knew there was a problem and  released technical bulletins to make some corrections. Well I use a different approach in application of the 30Vdc supply to the motors only in fast wind mode. Does this work you might say? Well both fast winds with my modification finished the same roll of tape at 58 seconds. I have taken a signal out of the logic that signals the reel motor drive that it is doing fast wind mode. This then goes through some resistors and transistors to invert the signal to drive a TIP107 transistor that then sends the higher voltage to the motors. There is a diode that maintains the 14Vdc supply at play mode on those motors and that prevents the feed of the 30 Vdc supply back to the 14Vdc supply. I have tested this deck and it is going through more tests but if you want to get your deck corrected for this problem, contact me.

Well the first of my mods is out there and only time will tell if the client likes it. I have a feeling that anyone who has sat through the slow wind speeds will fine this less than a minute speed much better. I have obtained some further parts to build these kits. I just have to do the  schematic and instructions. I think the idea will be well received once people find out how well these decks can work.

Damping Silicone in 8ml bottles

This product is used to dampen the movement of left tension arms in Teac and other tape decks. Its Viscosity is 300,000 cSt.  The 8mL sized bottle should be enough to do 3-5 tension arms per bottle. As you probably already know this product is not easy to find. The product name is Dimethyl Polysiloxane. I offer this as a service to my fellow Service Technicians who can not afford to buy a Gallon of it for over $400.

I have used it successfully on a number of decks already. It does work.

Cost is $5.00 plus $7.00 shipping.

Contact me at skywavebe@sbcglobal.net to order one or a couple bottles.

They are in limited numbers.Silicone 8ml-2

What you need to know for Repairs

Over the last 45 years of service in the Electronics Industry, I have worked on anything from Coffee Pots, Rice cookers, VCR’s, Camcorders, Digital Betacam, and then Transmitters in the AM and FM Radio business.  There is a lot to see. But in working on consumer tape decks and amplifiers there are a few things that stick out for anyone wishing to repair electronics should watch out for.

They can be things like poor wave soldering of the boards. There is so little solder on these parts that the smallest bump or vibration will cause a failure of that circuit. Multiply this by 100- 200 joints in a machine and you have a real good chance that it will need repair sooner rather than later. Other things that can break weak joints are conditions of thermal cycling. Does the part have a heat sink on it or does it get hot? Well so does the joint. So many cycles will make the solder joint weak and it was develop a ring around the part lead and again an intermittent connection or break. Corrections done by a good Technician who knows how to solder using Kester 44 (Lead) solder will do wonders for the longevity of the unit.

That is not the only thing that causes failure. There is the infamous 10 V Electrolytic capacitor. These 10 V types have proven a very high failure part so that I often tell others that I am allergic to 10 V caps. Many a tape deck or other equipment that have this part are on borrowed time from when they are made. I just was working on a Teac Z6000 tape deck. Playback was lost on the left channel. Further examination indicated that the coupling cap was defective and must have had a bad connection inside. What value was it? 220uFd/ 10V. Not the type of part I would expect in a $1500 tape deck. Don’t feel bad Teac, Revox and Uher have their Frako caps too. They are notorious for shorting.

7/18/16

OK, Now for the X series tape decks from Teac. Some think that having dual capstan drive is a plus. Technicians can tell you what a headache they can be. There is sensitivity to belt length, belt position, how clean the pinch rollers are and dirt on the capstan shaft. However, what causes me to write this is that I have also found the the two conditions that are seen are either Skew or tape looping. Looping is when the tape comes away from the heads making a perfect loop down below them. This is most likely caused by a loose belt. Most all X series need a 16.8″ belt but some sell 17″ belts that are near the limit to not use them. They sometimes do not work and if they do only for 6 month. Marrs has the good belts at 16.8″ X .330″ wide.

Next there is Skew. This is when the tape travels off the straight path at the pinch roller. I have determined recently that some genius adjusted the head position on the head block so that they are tilted and THIS make the tape skew. Of course the machine never works like they adjust them. Just go turning all the head screw and you are sure to make the deck better- Yes after about $160 of Technicians work. Rule is don’t touch these screws you need a lot to put them back into position.. Please,I have more than enough work already.

The best Service Manuals come from Stereomanuals.com .  If I do not have one I need that is where I get them!

Tascam 122 Mk III and Other models- 112 and so on: Gear

I am now at the point that I am taking orders for the gear that so many service shops and people need to fix their blinking transport lights problem. Teac does not have this part any more but I have had them made up. They are $30 plus the postage- I will not ship in a flat envelope like the $80 guy does on E bay. What does it look like-This is a Resin cast gear as were the original ones. Some call it gear B some Gear C. In the 122 Mk III parts diagram 4 the 4-34 part is what this is and was part number 5801474300 and sub’d to 9278377600.

122Gear wm

To obtain one or some, contact me at skywavebe@sbcglobal.netI take credit cards- MC, Visa and Discover and can take Paypal as well. The cost of obtaining the gears has gone up slightly so they are $30 each now. Also know that the mechanism must be cleaned and greased prior to use or the same problem can occur. I have never had a new one fail yet.

I can’t find anyone to make them for free!

Tascam 122 MK II

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Items For Sale

People have trouble buying good decks from E bay mostly because the equipment there is old and has had very little maintenance and some of it has been tampered with by amateurs. Well here is a place you can get a deck that has been checked out, calibrated and tested for correct function. They also have a 6 month warranty.

I will be offering Teac, Tascam, Nakamichi, Pioneer and other brands that have passed our testing procedure. There are units ready now I just have to get the pictures ready.

Currently a Pioneer CTF700 is ready to go.

2 of Nakamichi MR-2 decks tested. Working on pictures.

I have had units ready to sell but some of them sold before I could even take a picture of them to list here. It seems I can not get them ready fast enough.

 

Local Service Shops?

I have been working on some machines that are clearly butchered by local shops. If I was to be doing this kind off work I would not put a big gold sticker on the back saying Electronic Sale and Service. The Service part is clearly not there. You have to be careful who you hand your equipment to and one of the first signs they are only after your money is the Deposit Fee.

Another thing I find annoying is that they don’t put all the screws back or that they put them in with a jack hammer and strip out the heads. Some machines that I get in show the only thing the guy who worked on it last was good at was putting a lot of wire ties on. Of course they all have to be cut out to correct his incompetent work. Just today I had a Audio board mounted wrong with tape and insulation foam added to the board. Why not save all this time and tape and put the board in the right way? They left the front pots not tightened down and then used a cassette deck belt in an open reel. It was real dirty inside but they did nothing about that. Maybe the dirt accumulated came from their shop where it sat for a long time. Of course it works well now. Teac’s lowest reel deck of the line an X-3 derivative called a 22-2 has a wow and flutter of .018% after I got done with it. Must be that AMS Signature oil I put in.

Where to find me?

Some people have called and asked to get my address to drop off  a unit or to ship them to me. Well here is that info-

Skywave Tape Deck Repair
617 McLean Ave.
Bensenville, IL 60106

E mail: skywavebe@sbcglobal.net

For those looking to drop off units, I am at the SW corner of O’Hare Airport not far from Route 83 and 1/2 mile  South of Irving Park Road(Rt 19).  I am here most of the time but if you are dropping off it is best to let me know when you plan to arrive.

If you have questions, my office phone is (630)616-0932.

Tape Decks and other equipment repair

Z6000A

Do you have a Tape deck such as a Cassette or Open Reel that needs to be repaired or calibrated?  Well you have come to the right place!  I have been doing this work for over 40 years.  I was employed at the Teac Factory Service in Arlington Heights and the Sony Factory Service in Niles IL. Neither are open anymore making it difficult to get your equipment repaired until you found me!  Well why don’t we get started then?  I service Teac/Tascam, Pioneer,  Studer, Otari, Sony and Technics machines.

I can be contacted byEmail: skywavebe@sbcglobal.net

Phone: (708) 334-2260,  Longtime member of Tapeheads.net forum.

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