Manual for the repair of speakers 75GDN. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Speakers
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Replacing the foam suspension with a rubber one
Step 1. We examine the speaker from all sides for the presence of any other jambs
Step 2. Unsolder wires carefully
Step 3. At the beginning, the places where the corrugated ring is attached to the basket are wetted with a solvent. I used Yashim's acetone. This acetone turned out to be very good - without any additives. As it turned out, some manufacturers add water for weight, and this is extremely unacceptable in speaker repair.
Step 4. Next, for a long time and carefully we clean off the remnants of foam rubber from the details of the dyne.
Step 5. After many years, the foam rubber has turned into a glue-like consistency, it is necessary to clean off the paper diffuser very carefully, without damaging the base.
Step 6. Well, here are the parts cleaned and ready for gluing. It is very important to monitor the cleanliness of the gap between the magnet and the core; it is recommended to seal it with electrical tape or, at worst, tape for the duration of the repair.
Step 7. That's the same acetone. Attention! Work with acetone should be done with gloves and in a well-ventilated area! Keep out of the reach of children! Very poisonous!
Step 8. The parts were glued together with glue for a moment, the one in large tubes is a must! Gluing is carried out in the following order. First, glue the rubber suspension to the diffuser. Next, the diffuser is centered in the basket with the help of several pieces of old photo film and glued. Make sure that the conductors protruding from the diffuser coincide with the terminals on the basket.
Step 9. A feature of bonding with a moment: apply a thin layer of moment on the surfaces to be glued, having previously degreased it, you can use the same solvent, leave for a minute and press hard. It is the strength, not the duration, of the pressure that matters. In our case, I turned the speaker over onto the laminate and stepped on it with my weight. If your weight is not enough, you can ask a fat friend to help you.
Step 10. We leave to dry for a day.
Step 11. Now we need to check the dyne for manufacturing defects. We give a signal in the form of a sinusoid with a simple program like radiosvalka.narod.ru/soft/fg1.zip
Step 12. We put the din in its native place and enjoy the sound. This handsome man is still in 35AS-16 "Orbita"
For any questions, please contact cerber-666@yandex.ru
Author: Astashkin R.M., Saransk; Publication: cxem.net
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