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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: 

 

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A good quality soldering iron (25-40W) with a small tip. 

 

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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. 

 

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Thin raisin-core solder.  Do not use any flux or grease. 

 

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A diagonal cutter to trim excess wires.  To avoid injury when cutting excess  leads, hold the lead so they  
cannot fly towards the eyes. 

 

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Needle nose pliers, for bending leads, or to hold components in place. 

 

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Small blade and Phillips screwdrivers.  A basic range is fine. 

 

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.  

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Perform the assembly in the correct order as stated in this manual 

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Position all parts on the PCB (Printed Circuit Board) as shown on the drawings.  

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Values on the circuit diagram are subject to changes. 

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Values in this assembly guide are correct* 

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Use the check-boxes to mark your progress. 

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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.  

 

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Summary of Contents for K4001

Page 1: ...7W mono amplifier K4001 ILLUSTRATED ASSEMBLY MANUAL H4001IP 1 Total solder points 33 Difficulty level beginner 1 2 3 4 5 advanced Small but powerful multipurpose amplifier ...

Page 2: ...2 ...

Page 3: ...ected 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 Features Specifications ...

Page 4: ...the eyes Needle nose pliers for bending leads or to hold components in place Small blade and Phillips screwdrivers A basic range is fine 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 operati...

Page 5: ...ints are cone shaped and shiny 3 Trim excess leads as close as possible to the solder joint REMOVE THEM FROM THE TAPE ONE AT A TIME AXIAL COMPONENTS ARE TAPED IN THE CORRECT MOUNTING SEQUENCE You will find the colour code for the resistances and the LEDs in the HALG general manual and on our website http www velleman be common service aspx ...

Page 6: ... 1 Resistors R Construction C1 8n2 822 C2 100nF 104 C3 100nF 104 3 Capacitors C4 10µF C5 470µF C6 1000µF C7 1000µF 5 Electrolytic Capacitors Watch the polarity C IN GND LS GND V GND 4 PCB tabs R4 1 1 0 B B 9 2 Metal film resistor R IC1 TDA2003 6 IC ...

Page 7: ...s an example of a suitable mains supply for this circuit Naturally you can also use batteries to power the circuit FUSE 1A T FUSEHOLDER TRANSFORMER POWER SWITCH 240V 3A MAINS STRAIN RELIEF 12V AC 6VA RECTIFIER BRIDGE 1 5A 50V ELECTROLYTIC CAPACITOR 2200µF 25V ...

Page 8: ...ntrol Fig 2 0 47K OHM LOG GND Signal IN TO AMPLIFIER SHIELDED CABLE POTENTIOMETER FROM SOURCE GND SIGNAL Adjust the volume by connecting a 47K logarithmic potentiometer as indicated in figure 2 0 8 Volume control ...

Page 9: ...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 9 Connection example 4 8 OHM SPEAKER 8 18VDC 0 5A 47K LOG POTENTIOMETER FROM AUDIO SOURCE Fig 3 0 ...

Page 10: ...10 10 PCB layout PCB ...

Page 11: ...11 11 Diagram Diagram ...

Page 12: ...tions and typographical errors reserved Velleman Components nv H4001IP 2004 ED1 VELLEMAN Components NV Legen Heirweg 33 9890 Gavere Belgium Europe www velleman be www velleman kit com 5 4 1 0 3 2 9 2 8 9 0 0 3 ...

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