Speaker protection kit k4700 illustrated assembly manual h4700ip-1 total solder points: 163 difficulty level: beginner 1 2 3 4 5 advanced protect s your preciou s speak ers aga inst switch- on click s and d c curre nt..
3 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 : ...
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 ...
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 remove them from the tape one at a time ! Axial components are t...
6 r1 : 3k3 (3 - 3 - 2 - b) r2 : 3k3 (3 - 3 - 2 - b) r3 : 8k2 (8 - 2 - 2 - b) r4 : 8k2 (8 - 2 - 2 - b) r5 : 8k2 (8 - 2 - 2 - b) r6 : 8k2 (8 - 2 - 2 - b) r7 : 8k2 (8 - 2 - 2 - b) 4. Resistor r... Construction d1 : 1n4148 d2 : 1n4148 d3 : 1n4148 d4 : 1n4148 d5 : 1n4148 d6 : 1n4148 d7 : 1n4148 d8 : 1n41...
7 mains (n - l) +v man -v gnd pa ls pa ls 8. Pcb tabs. Construction ic1 : 14p t1 : bc547b t2 : bc547b t3 : bc547b t4 : bc517 7. Transistors left right 6. Ic socket, watch the position of the notch ! Ld1 cathode ld1 : red (error) ld2 : yellow (wait) 9. Leds. Watch the polarity! C1 : 1µ f c2 : 1µ f c3...
8 construction ry1 : vr15m121c (12vdc - 15a - 1c) ry2 : vr15m121c (12vdc - 15a - 1c) cover the wide connecting broad leads with solder. 12. Relays ry... Transfo (1,2va - 2 x 6v / 2 x 0,1a) 13. Transformer transformer 6 0 6 n l ic1 : lm324 14. Ic. Watch the position of the notch! Check the entire mod...
9 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...
10 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. T...
11 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 sp...
12 fig. 5.0 on/off input right mains output right output left input left power supply pa ls pa ls left right mains p4700 stereo power amplifier on/off input mains output + output - power supply pa ls pa ls left right mains p4700 bridge power amplifier fig. 6.0 connection.
13 17. Pcb layout. Pcb.
14 diagram 18. Diagram.
Modifications and typographical errors reserved © velleman components nv. H4700ip - 2004 - ed1 (rev 1.0) velleman components nv legen heirweg 33 9890 gavere belgium europe www.Velleman.Be www.Velleman-kit.Com 5 4 1 0 3 2 9 3 1 0 1 6 5.
