Related Manuals for Velleman POWER BLOCK K8081
Summary of Contents for Velleman POWER BLOCK K8081
- Page 1 POWERBLOCK - POWER AMPLIFIER Total solder points: 383 5 ⌧ advanced Difficulty level: beginner 1 K8081 K8081 ILLUSTRATED ASSEMBLY MANUAL H8081IP-1...
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Page 3: Specifications
Features & specifications This power amplifier is an ideal set-up for active speaker use. Build a high-quality system, using two (stereo) or more (surround) amplifiers. Due to its auto switch-on, through input signal sensing, the unit can be installed at almost any place. Comes complete with enclosure and transformer. - Page 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.
- Page 5 Assembly hints ⇒ 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. 1.3 Soldering Hints : 1- Mount the component against the PCB sur- face and carefully solder the leads...
- Page 6 Construction 1. Jump wires. 3. Zener diodes (check the polarity) ZD... ZD1 : 5V1 CATHODE ZD2 : 9V1 4. 1/4W resistors. 2. Diodes (check the polarity) D ... R... C A T H O D E : 330 (3 - 3 - 1 - B) : 220 (2 - 2 - 1 - B) D1 : 1N4148...
- Page 7 Construction R33 : 3K3 (3 - 3 - 2 - B) 8. Transistors R34 : 560 (5 - 6 - 1 - B - 9) T1 : BC640 R35 : 10K (1 - 0 - 3 - B) T2 : BC640 R36 : 47K (4 - 7 - 3 - B) T3 : BC639...
- Page 8 Construction 11. Male board wire connector : IN LD... 12. 5W resistors R42 : 0,47 R... R43 : 0,47 CATHODE CATHODE 13. Flat receptacles LD1 : yellow (standby) LD2 : Blue (on) LD3 : red (check) SK... AC RED IMPORTANT AC GREY Mount these LED's exactly like in the AC YELLOW...
- Page 9 construction 15. Power diodes 17. Electrolytic capacitors. (check the polarity) Watch the polarity ! D... C23 : 3300µF / 50V C24 : 3300µF / 50V CATHODE C... 18. IC's. Watch the position of the notch! IC1 : LM258P IC2 : VK8081 (programmed PIC10F200-I/PG) IC3 : TIL111 or 4N27 19.Brackets...
- Page 10 Assembly Use the colour pictures on packaging as guideline 20. ASSEMBLY OF THE UNIT Max. 1.5mm • cut all connections to 1.5mm Make sure that the solder connections don't touch the housing. • fix rubber foot in center of PCB...
- Page 11 Assembly • slide the PCB into the heatsink • fix the PCB using 4 bolts + nut • fix the 4 nuts inside...
- Page 12 Assembly • bend C4 away from T9 • bend C5 away from T8...
- Page 13 Assembly • apply some heat conductive silicone grease to tran- sistor and diode. isolator M3 bolt • place the M3 bolt for T8 and T9 • mount the isolator to heatsink, apply grease to both sides...
- Page 14 Assembly • bend the leads for T8 (TIP142) and T9 (TIP147) like in the photograph. • position the transistors T8 (TIP142) and T9 (TIP147) and fix using lock washer and 6mm M3 nut. lock washer 6mm M3 nut...
- Page 15 Assembly • solder the connections carefully, check by trying to move the leads after soldering • Remove the isolation • prepare the speaker output cables (red & black), one side with terminal + cover, other side with eyelet connector speaker output connection set...
- Page 16 Assembly • mount all connectors and fuse, check position of speaker connector and switch holder to the rear panel • position the fuse holder exactly like in the picture rear panel inside view...
- Page 17 Assembly • align the RCA mounting nut • solder the 2 wire connector cable to the RCA, brown = signal ground & red = signal. Twist the connector wire...
- Page 18 Assembly • connect the speaker wires exactly like in the picture ( + = red wire) • insert 2 A slow blow fuse • cut 3 pcs. of 3cm from the shrink tube...
- Page 19 Assembly • solder one 8cm brown wire to the switch and one to the fuse holder • slide a piece of shrink tube over the transformer mains connections : black wire brown wire (100-120VAC) or the orange wire (220-245VAC) • connect the black wire to the power switch •...
- Page 20 Assembly • isolate the not used transformer wire using a piece of tape. • shrink the tube using heater or hair dryer.
- Page 21 Assembly • apply glue to the transformer protector • position the protector like in the drawing • solder terminal + cover to the 4 transformer wires...
- Page 22 Assembly • position the rear panel and the transformer • fix the rear panel, use 4 self tapping screws.
- Page 23 Assembly • connect the input signal connector • connect the AC connectors RED, BLUE, GREY and YELLOW...
- Page 24 Assembly -LS (black) +LS (red) • connect the speaker +LS red and -LS black wires • check the wire styling and apply straps...
- Page 25 Assembly • position the transformer insulation rubber • stick the isolator foil to the transformer...
- Page 26 Test 21. TESTING THE DC PROTECTION CIRCUIT : Preliminary test: Recheck carefully if the selection of primary AC voltage, complies to your mains voltage. 120Vac: black / brown. 230Vac: black /orange. IMPORTANT: Insulate the wire that is not being used. Verify that the amplifier is turned off (switch at rear panel) Turn the RV1 bias adjust trimmer fully counter clockwise (turn left)
- Page 27 Test DC error detection test: 40V test voltage Test point • Briefly connect the +40V test point with the TEST pin. The RED check LED should BLINK and the relay should switch off. Check LED Turn off the AC power. The amplifier is now ready for use.
- Page 28 Test • mount the front panel • fix the front panel, use 4 self tapping screws. • check the position of the LEDs • mount the transformer positioning plate...
- Page 29 Test Check that the fixation bolt does not make contact with the wires! • position 4 spacer nuts...
- Page 30 Test hexagonal bolt rubber foot • mount the bottom panel using 4 hexagonal bolts and fix in each corner a rubber foot...
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Page 31: Input Signal
Connection 22. Connection Rear panel connections: POWER SUPPLY Loudspeaker (-) Loudspeaker (+) INPUT SIGNAL ~ 235VAC or Ω Ω 4- 8 4- 8 ~115 VAC Connect the input signal, coming from a pre amplifier, volume and tone control (ex K8084), mixing panel.. Connect speakers, it is advised to use 4 ohm speakers for maximum output power. - Page 32 Connection Front panel indications: STANDBY CHECK STANDBY: LIT when mains power is ON ( Fuse OK) ON: LIT when amplifier is ON ( input signal is amplified ) CHECK: has 2 functions 1– Blinks short if no signal is sensed during ON 2–...
- Page 33 23. PCB...
- Page 34 Schematic diagram 24. Schematic diagram...
- Page 36 VELLEMAN KIT NV Legen Heirweg 33 9890 Gavere Belgium Europe Info ?: http://www.velleman.be Modifications and typographical errors reserved © Velleman Kit nv H8081IP - 2007 - ED1 (rev.2.0) 5 4 1 0 3 2 9 3 6 0 0 5 4...