Total solder points: 33 Difficulty level: beginner advanced. 7W mono amplifier K4001 ILLUSTRATED ASSEMBLY MANUAL
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1 Total solder points: 33 Difficulty level: beginner advanced 7W mono amplifier K4001 Small but powerful multipurpose amplifier. ILLUSTRATED ASSEMBLY MANUAL H4001IP-1
2 2
3 Features & Specifications Features: This small amplifier is constructed around the TDA2003 IC, capable of delivering 4Wrms at 4ohms. The IC is completely thermally and short-circuit protected. A conventional direct current can be connected as supply. Specifications : Music output power : 7W/4ohm RMS output power : 3.5W/4ohm or 2W/8ohm Total harmonic distortion : 0.05% (1W/1KHz) Frequency response : 20Hz-20KHz (-3dB) Input sensitivity : 40mV/150Kohm Signal/noise ratio : 86dB (A weighted) Power supply : 8-18VDC/0.5A Dimensions : 55x35mm (2.2 x 1.4 ) 3
4 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. Wipe it often on a wet sponge or cloth, to keep it clean; then apply solder to the tip, to give it a wet look. This is called thinning and will protect the tip, and enables you to make good connections. When solder rolls off the tip, it needs cleaning. Thin raisin-core solder. Do not use any flux or grease. A diagonal cutter to trim excess wires. To avoid injury when cutting excess leads, hold the lead so they cannot fly towards the eyes. Needle nose pliers, for bending leads, or to hold components in place. Small blade and Phillips screwdrivers. A basic range is fine. 4 For some projects, a basic multi-meter is required, or might be handy 1.2 Assembly Hints : Make sure the skill level matches your experience, to avoid disappointments. Follow the instructions carefully. Read and understand the entire step before you perform each operation. Perform the assembly in the correct order as stated in this manual Position all parts on the PCB (Printed Circuit Board) as shown on the drawings. Values on the circuit diagram are subject to changes. Values in this assembly guide are correct* Use the check-boxes to mark your progress. Please read the included information on safety and customer service * Typographical inaccuracies excluded. Always look for possible last minute manual updates, indicated as NOTE on a separate leaflet
5 Assembly hints 1.3 Soldering Hints : 1- Mount the component against the PCB surface and carefully solder the leads 2- Make sure the solder joints are cone-shaped and shiny 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 in the HALG (general manual) and on our website: 5
6 Construction 1. Resistors. R PCB tabs IN GND 6. IC. IC1 : TDA2003! R1 : 470 ( B) R2 : 4,7 (4-7 - B - B) R3 : 100 ( B) 2. Metal film resistor. R... LS GND +V GND 5. Electrolytic Capacitors. Watch the polarity! R4 : 1 (1-0 - B - B - 9) 3. Capacitors. C1 : 8n2 (822) C2 : 100nF (104) C3 : 100nF (104) C4 : 10µF C5 : 470µF C6 : 1000µF C7 : 1000µF C... 6
7 Supply connection 7. Supply connection Figure 1 is an example of a suitable mains supply for this circuit. Naturally, you can also use batteries to power the circuit. FUSEHOLDER MAINS FUSE 1A T POWER SWITCH 240V 3A TRANSFORMER 12V AC 6VA RECTIFIER BRIDGE 1.5A 50V + - STRAIN RELIEF ELECTROLYTIC CAPACITOR 2200µF 25V Fig
8 Volume control 8. Volume control Adjust the volume by connecting a 47K logarithmic potentiometer as indicated in figure 2.0. SHIELDED CABLE TO AMPLIFIER FROM SOURCE Signal IN GND POTENTIOMETER 47K OHM LOG 8 SIGNAL (+) GND Fig. 2.0
9 Connection example 9. Connection example Figure 3.0 is an example of a connection diagram of a 4 or 8 ohm speaker that is connected to the pins LS and GND. The input signal should be connected with the IN and GND pins. FROM AUDIO SOURCE /8 OHM SPEAKER 47K LOG POTENTIOMETER VDC / 0.5A Fig
10 PCB 10. PCB layout. 10
11 Diagram 11. Diagram 11
12 VELLEMAN Components NV Legen Heirweg Gavere Belgium Europe Modifications and typographical errors reserved Velleman Components nv. H4001IP ED
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