Asr-33 manual

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Refer to the manual for proper lubrication points and cleaning procedures. Ask an expert for your particular model. Where do I get parts? What parts I have available are listed here Join the Greenkeys mailing list , they can help you there. Old print head pads will have turned to mush by now, but that's OK! First remove printer ribbon, but note how it was attached so you can return it into the proper position. Cut out the pad leaving only the hammer's metal striker bar.

Look between the two ribbon spindles for a clear-plastic pvc tube cut and placed over the print hammer. Every time you replace a printer ribbon, check the tubing. You may need to replace the tube after a lot of use. Use caution when opening your ASR 33 There are three screws behind the metal "Teletype" strip in the front.

Here is a picture of the three screws, view with the cover removed and the knob re-attached. There is often but not always one tiny screw that holds the cover on the left side by the papertape reader. You can see the little hole in this picture There are three knobbed screws in the back. Pic after cover removed Remove the printer paper advance knob Carefully remove cover, avoid the papertape reader lock. AVOID removing the keyboard cover unless you have to! That said, with care you can put all of the thin metal bars back the way they were, if you take a picture before you start, or refer to photos of working units.

A crossed bar anywhere - keyboard, punch, or reader can cause the system to short circuit and not print correctly. The large, green, flat resistor on the TTY base near the call control unit a flat 4-post resistor with a blue wire on post 4 2. Set purple wire to contact 9 of the terminal strip 3. Set brown-yellow wire on terminal strip post 5 4. Plug In connectors molex 2. Terminal Strip If you're making a cable with a special connector to match your particular computer card EITHER the terminal strip or 2 connector can be used.

If you have something attached to both at the same time you'll get crazy results. Of course your computer must have the ability to generate a 20 mA current loop, the computer generates the current, NOT the teletype. You can use a 20mA to RS converter to overcome this problem, how-to is not covered here, but contact me for info on this subject.

The repair was quite simple, after finding the new print head. After replacing the print head, I replaced the gooey pad with a small rubber cabinet foot found at Radio Shack. All the old goop had to be completely cleaned from the hammer before sticking on the new rubber foot, as I did not want it to fall off in action and ruin the new print head.

I used Goof-Off Home Depot and an old toothbrush to do this, as it does not leave a greasy residue--very important thing here. At VCF 9.

Good luck. This can be very challenging. Search ebay, surplus outlets, Greenkeys , garage sales, etc. You may have to buy another Teletype just to get the print head! If you have, or if you find an ASR Did I say that loud enough?

Do not operate it for even one keypress before doing this!! If you have already replaced you print head, it is still a good idea to inspect it regularly--I learned this the hard way. It fell off at the show and ruined another print head. Erik Klein of vintage-computer. What a pal! Thanks again Erik! Pad turned to goo photo center Hammer goo on the fingers New printhead with rubber foot on hammer Teletype Links.