Velleman K4005B User manual

Total solder points: 264
Difficulty level: beginner 1 2 3 4 ⌧5 advanced
400W MONO/STEREO AMPLIFIER
ILLUSTRATED ASSEMBLY MANUAL H4005B-IP-2
K4005B
K4005B
Universal,robustandcompactarethewordsto
describethisamplifier.

Specifications:
• Input impedance : 22kohm .
• Input 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 / 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.
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Features & specifications

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 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 l eads,
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 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.
0.000

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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 !
Assembly hints
DO NOT BLINDLY FOLLOW THE ORDER OF THE
COMPONENTS ONTO THE TAPE. ALWAYS CHECK
THEIR VALUE ON THE PARTS LIST!

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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 - 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 950mV.
 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-bridged amplifier.
 Here a unipolar change-over switch may be mounted as well!
1. Jumpers
JH JM
JH JM
JH JM
JH JM
JH JM
JH JM
JB JS
JB JS
JB JS
JB JS
 D1 : 1N5404
 D2 : 1N5404
2. Diodes. Watch the polarity!
D...
CATHODE
 ZD1 : 15V0
 ZD2 : 15V0
3. Zener diodes. Watch the polarity!
ZD...
CATHODE

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 C1 : 15pF
 C2 : 15pF
 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, µ1)
 C16 : 100nF (104, µ1)
 C17 : 100nF (104, µ1)
 C18 : 100nF (104, µ1)
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 (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 : 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
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 : 1µF/63V
 C22 : 1µF/63V
12. Capacitors
 C19 : 0,47µF
 C20 : 0,47µF
 C23 : 2µ2
 C24 : 4µ7
 C25 : 4µ7
 C26 : 22µF
 C27 : 22µF
 C28 : 100µF
 C29 : 100µF
 C30 : 100µF
 C31 : 100µF
 C32 : 220µF
 C33 : 220µF
 C34 : 220µF
 C35 : 220µF
 C36 : 4µ7
14. Electrolytic capacitors.
Check the polarity!
C...
C...
 -LS
 +LS
 GND : 3x
 +V
 -V
13. Spade connectors
SK...
F...
 LD1 : 5mm red.
 LD2 : 5mm red.
15. Led’s. Watch the polarity!
CATHODE
1
20mm
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. IC’s. Watch the position of the
notch!
 Resistors R41 & R42 and capacitors C37 & C38
are 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 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!
 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 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

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 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 type 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 may be soldered to the corresponding print pins.
FIG. 6.0
Power transistors

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 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 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 measured.
• 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 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

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FIG. 9.0
2. As a mono-bridged amplifier:
• See Fig. 9.0 for the connection of the 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
bolts 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

VELLEMAN NV
Legen Heirweg 33
9890 Gavere
Belgium Europe
www.velleman.be
www.velleman-kit.com

5 410329 291891
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 (rev2)