Velleman-K4005B-pwr-sm 维修电路原理图.pdf

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1、Total solder points: 264 Difficulty level: beginner 1 ? 2 ? 3 ? 4 5 ? advanced 400W MONO/STEREO AMPLIFIER ILLUSTRATED ASSEMBLY MANUAL H4005B-IP-2 K4005BK4005B Universal, robust and compact are the words to describe this amplifier. RadioFans.CN 收音机爱 好者资料库Specifications: Input impedance : 22kohm . Inp

2、ut sensitivity : 150mV, 300mV or 950mV switchable . Supply voltage for 8 ohm : + 35 to 40VDC and - 35 to 40VDC / 2.5A. Supply voltage for 4 ohm or mono: + 25 to 30VDC and - 25 to 30VDC/ 5A Dimensions : 350 x 62 x 85mm (13.8 x 2.5 x 3.4). modifications reserved Features: ? Rms output power : 2 x 100W

3、 / 4ohm ; 2 x 75W / 8ohm. ? Rms mono-bridged power : 200W / 8ohm. ? Total music output : 400W. ? Harmonic distortion : 0.003% at 1KHz. ? Signal-to-noise ratio : 96dB (A-weighted). ? Stereo channel separation : 76dB. ? Damping factor (at 100Hz) : 2000. 2 Features & specifications RadioFans.CN 收音机爱 好者

4、资料库3 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 w

5、et 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

6、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. For some projects, a basic multi-meter is re

7、quired, 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 Pos

8、ition 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

9、 inaccuracies excluded. Always look for possible last minute manual updates, indicated as NOTE on a separate leaflet. 0.0004 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 lea

10、ds as close as possible to the solder joint REMOVE THEM FROM THE TAPE ONE AT A TIME ! Assembly hints AXIAL COMPONENTS ARE TAPED IN THE CORRECT MOUNTING SEQUENCE ! 5 Construction ? R1 : 22K (2 - 2 - 3 - B) ? R2 : 22K (2 - 2 - 3 - B) ? R3 : 22K (2 - 2 - 3 - B) ? R4 : 22K (2 - 2 - 3 - B) ? R5 : 22K (2

11、- 2 - 3 - B) ? R6 : 22K (2 - 2 - 3 - B) ? R7 : 22K (2 - 2 - 3 - B) ? R8 : 2K2 (2 - 2 - 2 - B) ? R9 : 1K8 (1 - 8 - 2 - B) ? R12 : 47K (4 - 7 - 3 - B) ? R13 : 120K (1 - 2 - 4 - B) 4. 1/4W Resistors R. ? J : 8X Choice between different input sensitivities : ? Mount the jumpers JH for a sensitivity of 9

12、50mV. ? Mount the jumpers JM for a sensitivity of 500mV. ? Leave both jumper connections OPEN for a sensitivity of 150mV. ? A bipolair THREE POSITION switch may be mounted here as well! Choice between stereo or mono : ? Mount the jumpers JS for a stereo amplifier. ? Mount the jumpers JB for a mono-b

13、ridged amplifier. ? Here a unipolar change-over switch may be mounted as well! 1. Jumpers JHJMJHJMJHJMJHJMJHJMJHJMJBJSJBJSJBJSJBJS ? D1 : 1N5404 ? D2 : 1N5404 2. Diodes. Watch the polarity! D.CATHODE ? ZD1 : 15V0 ? ZD2 : 15V0 3. Zener diodes. Watch the polarity! ZD.CATHODE6 ? C1 : 15pF ? C2 : 15pF ?

14、 C3 : 100pF (101) ? C4 : 100pF (101) ? C5 : 100pF (101) ? C6 : 100pF (101) ? C7 : 100pF (101) ? C8 : 100pF (101) ? C9 : 150pF (151) ? C10 : 150pF (151) ? C11 : 150pF (151) ? C12 : 150pF (151) ? C13 : 1n2 (122) ? C14 : 1n2 (122) ? C15 : 100nF (104, 1) ? C16 : 100nF (104, 1) ? C17 : 100nF (104, 1) ? C

15、18 : 100nF (104, 1) 9. Ceramic Capacitors C.Construction ? R10 : 7K5 (7 - 5 - 0 - 1 - 1) ? R11 : 20K (2 - 0 - 0 - 2 - 1) 5. Metal film resistors R.? R14 : 68K (6 - 8 - 3 - B) ? R15 : 220K (2 - 2 - 4 - B) ? R16 : 1K5 (1 - 5 - 2 - B) ? R17 : 1K5 (1 - 5 - 2 - B) ? R18 : 560 (5 - 6 - 1 - B) ? R19 : 560

16、(5 - 6 - 1 - B) ? R20 : 2K7 (2 - 7 - 2 - B) ? R21 : 2K7 (2 - 7 - 2 - B) ? R22 : 100K (1 - 0 - 4 - B) ? R23 : 470K (4 - 7 - 4 - B) ? R24 : 10K (1 - 0 - 3 - B) ? R25 : 33 (3 - 3 - 0 - B) ? R26 : 33 (3 - 3 - 0 - B) ? R27 : 33 (3 - 3 - 0 - B) ? R28 : 33 (3 - 3 - 0 - B) ? R29 : 390 (3 - 9 - 1 - B) ? R30

17、: 390 (3 - 9 - 1 - B) ? R31 : 390 (3 - 9 - 1 - B) ? R32 : 390 (3 - 9 - 1 - B) ? R33 : 1K (1 - 0 - 2 - B) ? R34 : 1K (1 - 0 - 2 - B) ? R35 : 1K (1 - 0 - 2 - B) ? R36 : 1K (1 - 0 - 2 - B) 6. 1W resistors. R. ? R37 : 0,1 ? R38 : 0,1 ? R39 : 0,1 ? R40 : 0,1 7. 5W resistors. R.2mm ? IC1 : 8p ? IC2 : 20p

18、8. IC sockets. ? T1 : E, B & C ? T2 : E, B & C ? T3 : E, B & C ? T4 : E, B & C ? TS : if a therminal protection is to be connected. 10. PCB tabs. 7 Assembly ? F1 : 6,3A “slow” ? F2 : 6,3A “slow” 11. Fuse holders + Fuses ? C21 : 1F/63V ? C22 : 1F/63V 12. Capacitors ? C19 : 0,47F ? C20 : 0,47F ? C23 :

19、 22 ? C24 : 47 ? C25 : 47 ? C26 : 22F ? C27 : 22F ? C28 : 100F ? C29 : 100F ? C30 : 100F ? C31 : 100F ? C32 : 220F ? C33 : 220F ? C34 : 220F ? C35 : 220F ? C36 : 47 14. Electrolytic capacitors. Check the polarity! C.C. ? -LS ? +LS ? GND : 3x ? +V ? -V 13. Spade connectors SK.F. ? LD1 : 5mm red. ? LD

20、2 : 5mm red. 15. Leds. Watch the polarity! CATHODE120mm LD. For stereo use : ? Left input ? Right bridge input For mono-bridged use : ? Right bridge input 16. Cinch connector(s) ? IC1 : TL072 ? IC2 : TDA7250 17. ICs. Watch the position of the notch! ? Resistors R41 & R42 and capacitors C37 & C38 are

21、 not being used! 8 ? Slide the PCB in the largest slot of the heat sink. (See fig. 1.0) ? Note : If the optional thermal protection is used, a hexagonal bolt should be slit into the mounting slot, and into the hole in the P.C.B. Then the THERMIC may be mounted on the heat sink and its terminals may

22、be connected to the positions TS (see Fig. 2.0). ? Position the P.C.B. in the middle of the heat sink. 18. Mount the PCB in the heat sink FIG. 2.0 FIG. 1.0 PCB mounting 9 Two transistors are mounted at both ends of the heat sink (for their positions refer to Fig. 3.0). ? T1 & T2 : TIP142 of motorola

23、! ? T3 & T4 : TIP147 of motorola! FIG. 3.0 ? Bend the connections of each transistor as in Fig. 4.0. ? Put them in the correct position on the heat sink and against the P.C.B., mark the place of the transistors. ? Apply a drop of thermally conductive paste to the points where the transistors will be

24、 mounted (Fig 5.0). ? Put an insulating mica on the drop of paste. 19. Power transistors Power transistors FIG. 4.0 thermally conductive paste FIG. 5.0 10 ? Apply a drop of paste on each transistor and put them in the correct position on the heat sink and against the P.C.B. Make sure the correct typ

25、e of transistor is placed in the correct position (T1.T4). ? Fix the transistors well in place by means of the supplied plate and a hexagonal bolt, which is slit into the slot in the heat sink (see Fig. 6.0). Make sure the transistor connections do NOT TOUCH the metal plate! ? Now the transistors ma

26、y be soldered to the corresponding print pins. FIG. 6.0 Power transistors 11 ? Connect a symetrical power supply unit (possibly the APS200, SPS200 or K3508 module) of + and - 30 tot 45VDC to the positions GND (0V), -V and +V. See Fig. 7.0. ? IMPORTANT: Do not switch on the supply voltage before the

27、connections to the amplifier are made! ? Switch on the supply voltage. Normally both LEDs on the amplifier P.C.B. should light up to indi-cate that the power supply is alright. Carry out the following measurements: Across each of the 5W resistors R37 to R40 a voltage of about 0.01V should be measure

28、d. Between each speaker output terminal and the GND terminal a voltage of about 0V (max. 0.5V) should be measured. The amplifier is now ready for use. 20. Test FIG. 7.0 Test & Use ? NOTE : Carry out all connections by means of 1.5mm wire and the supplied flat connector bushes. Solder the wire to the

29、 connector bushes and slide the insulation over them. 1. As a stereo amplifier: See Fig. 8.0 for the connection of the power supply and the speakers. Watch the polarity of the speakers! 21. Use and connection FIG. 8.0 12 FIG. 9.0 2. As a mono-bridged amplifier: See Fig. 9.0 for the connection of the

30、 power supply and the speaker. Make sure that the impedance of the connected speaker is not less than 8 ohms. ? IMPORTANT: Always connect the outputs first, before the power supply is switched on. If the amplifier is to be used as a free-standing unit, it may be attached by means of M4 hexagonal bol

31、ts and the corresponding slots in the heat sink. ? Always mount a 10 ohm (1/4W) resistor in series with the piezo tweeter, both for stereo and for mono amplification Use & connections 13 22. Diagram power supply Diagram 14 23. PCB PCB 15 16 VELLEMAN KIT NV Legen Heirweg 33 9890 Gavere Belgium Europe Info ?: http:/www.velleman.be Modifications and typographical errors reserved Velleman Kit nv H4005B_IP - 2004 - ED2 (rev1) 5 4 1 0 3 2 9 2 9 1 8 9 1