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Summary of Contents for Velleman K4700
- Page 1 Total solder points: 163 Difficulty level: beginner 1 advanced SPEAKER PROTECTION KIT K4700 ILLUSTRATED ASSEMBLY MANUAL H4700IP-1...
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Page 3: Specifications
Features & Specifications Features This stereo loudspeaker protection will protect the loudspeakers against the switch-impulsions and the direct current component on the output of the connected amplifier. Suitable for: * Amplifiers with symmetrical power supply * Amplifiers with asymmetrical power supply. Specifications : Switch-delay: ±... -
Page 4: Assembly Hints
Assembly hints 1. Assembly (Skipping this can lead to troubles ! ) Ok, so we have your attention. These hints will help you to make this project successful. Read them carefully. 1.1 Make sure you have the right tools: • A good quality soldering iron (25-40W) with a small tip. - Page 5 3- Trim excess leads as close as possible to the solder joint AXIAL COMPONENTS ARE TAPED IN THE CORRECT MOUNTING SEQUENCE ! REMOVE THEM FROM THE TAPE ONE AT A TIME ! You will find the colour code for the resistances and the LEDs on our website: http://www.velleman.be/common/service.aspx...
- Page 6 Construction R8 : 330K (3 - 3 - 4 - B) 1. Diodes. Watch the polarity ! 3. Diodes. Watch the polarity ! R9 : 330K (3 - 3 - 4 - B) R10 : 330K (3 - 3 - 4 - B) D1 : 1N4148 D11 : 1N4007 R11 : 330K (3 - 3 - 4 - B)
- Page 7 Construction 6. IC socket, Watch the 9. Leds. Watch the polarity! 11. 1W vertical resistors position of the notch ! LD1 : Red (ERROR) IC1 : 14P LD2 : Yellow (WAIT) R... CATHODE 7. Transistors 10. Electrolytic Capacitor If the amplifier to which the module Watch the polarity ! is to be connected has a simple T1 : BC547B...
- Page 8 Construction 12. Relays 14. IC. Watch the position of the notch! RY... RY1 : VR15M121C IC1 : LM324 (12VDC - 15A - 1C) RY2 : VR15M121C (12VDC - 15A - 1C) Cover the wide connecting broad leads with solder. CHECK THE ENTIRE MODULE PROFOUNDLY 13.
- Page 9 Testing 15. Testing Connect a net-cord to the MAINS, connect the module to the net and check if after approx.+/-6 sec. the yellow LED 'WAIT' extinguishes; at the very same moment the LED is extinguishing, one should hear the clack of the relais switching. Testing the Left channel : Connect the point PA of the left channel to the point -V (figure 1.0);...
- Page 10 Testing Testing the right channel : Connect the point PA of the right channel to the point -V (figure 3.0); the red LED 'ERROR' should now be lightening together with the yellow LED 'WAIT'. When the connection is interrupted again (figure 4.0), the red LED should extinguish and after approx. +/- 6 sec.
- Page 11 Connection 16. Connection First find a proper place to install the protection module (f.i. against the back-side of the housing). Realise the following connections: MAINS: this connection has to be linked to the NET-connection of the transformer in the amplifier, i.e. AFTER the net-switch! PA: connect this point to the speaker-output of the amplifier, respectively for the left and the right signal (fig 5.0).
- Page 12 Connection LEFT LEFT P4700 P4700 MAINS RIGHT MAINS RIGHT ON/OFF ON/OFF POWER POWER MAINS MAINS SUPPLY SUPPLY OUTPUT + INPUT RIGHT OUTPUT RIGHT INPUT OUTPUT - INPUT LEFT OUTPUT LEFT Fig. 5.0 BRIDGE POWER AMPLIFIER Fig. 6.0 STEREO POWER AMPLIFIER...
- Page 13 17. PCB layout.
- Page 14 Diagram 18. Diagram...
- Page 16 VELLEMAN Components NV Legen Heirweg 33 9890 Gavere Belgium Europe www.velleman.be www.velleman-kit.com Modifications and typographical errors reserved © Velleman Components nv. H4700IP - 2004 - ED1 (rev 1.0) 5 4 1 0 3 2 9 3 1 0 1 6 5...
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