Electro-Voice EVX-156 User's Manual
Contents
1. Remove the white heat shrink tubing from the fuse that is attached to the positive input terminal see Figure 1 Check the continuity of the fuse using an ohmmeter Replace the fuse with a BUSS GFA 10 10 A FAST BLOW fuse if necessary CAUTION REPLACE THIS FUSE ONLY WITH ONE THAT IS OF THE SAME TYPE AND RATING 5 Slide the voice coil onto the centering fixture until the top of the voice coil touches the tape at the top of the fixture Place the fixture in the magnetic gap The fixture should rest on the top of the pole piece 6 Apply a bead of EV 97323 adhesive to the spider seating area on the frame DO NOT SUBSTITUTE THIS ADHESIVE r Slide the spider over the voice coil Press the outer perimeter of the spider into the ad esive 8 There are three counterbores in the frame where the spider is attached Apply a bead of EV 97323 adhesive to the top of the spider between the spider and the frame in these three areas 9 Mix one part of EV 97012 epoxy hardner to two parts of EV 97008 epoxy resin Stir for at least one minute 10 Apply a very small bead of the epoxy mixed in step nine to the in side diameter of the spider be amp amp tween the spider and voice coil Rotate the voice coil and center ing fixture to allow the spider to position itself on the voice coil 11 Apply a bead of EV 97019 rubber adhesive to the surround seating area on the frame Slide the cone over the voice coil Posi tion the cone such th2. 1 4 inch bead of adhesive around the outer perimeter of the dust dome between the dust dome and the cone This step must be followed care fully to prevent the dust dome from coming loose 19 Attach the rubber gasket that was removed in step one to the frame 20 Using a 1 2 inch paintbrush apply a coat of damping compound EV 97346 to the surround area of the cone 21 Apply a drop of 97258 RTV to each voice coil lead wire at the point where it exits the cone 22 Allow the speaker to sit for at least two hours before proceeding with tests TEST INSTRUCTIONS 1 Insulation Breakdown Test Hi pot test Apply 1000 volts 50 to 60 Hz ac between the NEGATIVE input terminal and the cone This should be applied to the cone at a point direct ly above the input terminals and midway between the dust dome and surround There should be no insulation breakdown as indicated on the breakdown tester This must be done because the cone contains carbon fiber which is conductive 2 Apply a 14 volt sine wave to the input terminals and sweep from 20 Hz to 2000 Hz There should be no rubs buzzes or spurious noises 3 Apply a 35 volt 20 Hz sine wave to the input terminals for one minute The speaker should not bottom This is indicated by a loud striking noise
3. HeciroToice SERVICE 600 Cecil Streat i Buchanan Michigan 49107 DATA Phone 616 695 6831 TWX 810 270 3135 EVX 156 WOOFERS MATERIALS REQUIRED QTY DESCRIPTION PART 1 CONE A72359 1 COIL 81556 1 SPIDER 72534 1 DUST DOME 72362 1 FUSE A4100 1 TUBING A66093 DUST DOME ADHESIVES REQUIRED a DESCRIPTION PART A EPOXY HARDENER 97012 B EPOXY RESIN 97008 C RTV SILICON 97258 D RUBBER CEMENT 97019 CONE E SPIDER CEMENT CLEAR 97323 F DAMPING COMPOUND 97346 TOOLS REQUIRED CENTERING FIXTURE 10890 FA SOLDERING IRON SHARP KNIFE PHILLIPS SCREWDRIVER HISEL C 1 2 INCH PAINTBRUSH SPIDER HEAT GUN OPTIONAL a HEAT LAMP OPTIONAL TEST EQUIPMENT COIL REQUIRED VOLTAGE BREAKDOWN TESTER SINE WAVE GENERATOR 200 WATT OR GREATER POWER AMPLIFIER AC VOLTMETER Pictorial 1 EVX 150 Parts OHMMETER RECONE INSTRUCTIONS Refer to Pictorial 1 1 Remove the outer rubber gasket and set aside this part will be reused later 2 Remove the old cone spider and voice coil by cutting along the outer perimeter of the cone and spider Cut both lead wires and remove the cone and discard 3 Using a chisel remove any excess adhesives where the cone and spider were attached Heating these areas with a heat gun will simplify this operation Be careful not to get any debris in the magnetic gap Vacuum the speaker to remove all the debris Remove any particles from the magnetic gap using a piece of folded masking tape 4
4. at the two holes in the neck of the cone are aligned with the input terminals Press the surround into the ad hesive being careful not to stretch the surround TERMINAL POST Figure 1 EVX Gluing Instructions 12 Route the two lead wires through the holes in the cone Pull the lead wires tight past the solder lugs The silicone insulation should extend 0 5 to 0 6 inches past the lug This assures that an adequate loop is put in the lead wires 13 Slide the piece of heat shrink tubing EV A66093 over the tinsel lead that attaches to the fuse which is connected to the positive input terminal see Figure 1 Solder the tin sel lead to the fuse using a 10 W 500 F soldering iron Using an iron of higher tempera ture may damage the fuse Slide the tubing over the fuse and shrink using a heat gun 14 Apply a bead of epoxy to the voice coil and cone joint Cover the lead wires with epoxy on the inside of the cone Be careful not to get any epoxy on the centering fixture 15 Allow the epoxy to cure overnight A heat lamp may be used to accelerate the epoxy cure Position the heat lamp a minimum of 18 inches above the epoxy joint 16 After the epoxy has hardened remove the centering fixture 17 To attach the dust dome use EV 97323 clear adhesive Do not use any other ad hesive to attach the dust dome 18 Apply a bead of adhesive to the lip on the outer perimeter of the dust dome and attach the dust dome to the cone Apply a
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