Velleman K8021 User manual

Total solder points: 500
Difficulty level:
beginner 1o2o3o4o5þadvanced
K8021
HIGH-END CONTROL AMPLIFIER
ILLUSTRATED ASSEMBLY MANUAL H8021IP-1

VELLEMAN KIT NV
Legen Heirweg 33
9890 Gavere
Belgium
http://www.velleman.be

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 leads, hold the lead so they cannot fly towards the eyes.
•Needle nose pliers, for bending leads, or to hold compo-
nents 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 draw-
ings.
⇒Values on the circuit diagram are subject to changes.
⇒Values in this assembly guide are correct*
0.000

4
⇒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
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
AXIAL COMPONENTS ARE TAPED IN
THE CORRECT MOUNTING SEQUENCE !

5
Color code table
IPESF SDK NDGB FNL C O D E
CODICE
COLORE CODIGO
DE
CORES
CODIGO
DE
COLORE
S
VÄRI
KOODI FÄRG
SCHEMA FARVE-
KODE FARGE-
KODE FARB
KODE COLOUR
CODE CODIFI-
CATION DES COU-
KLEUR
KODE C
O D E
0Nero Preto Negro Musta Svart Sort Sort Schwarz Black Noir Zwart 0 1Marrone Castanho Marrón Ruskea Brun Brun Brun Braun Brown Brun Bruin 1 2Rosso Encar- Rojo Punainen Röd Rød Rød Rot Red Rouge Rood 2 3Aran- Laranja Naran- Oranssi Orange Orange Orange Orange Orange Orange Oranje 3 4Giallo Amarelo Amarillo Keltainen Gul Gul Gul Gelb Yellow Jaune Geel 4 5Verde Verde Verde Vihreä Grön Grøn Grønn Grün Green Vert Groen 5 6Blu Azul Azul Sininen Blå Blå Blå Blau Blue Blue Blauw 6 7Viola Violeta Morado Purppura Lila Violet Violet Violet Purple Violet Paars 7 8Grigio Cinzento Gris Harmaa Grå Grå Grå Grau Grey Gris Grijs 8 9Bianco Branco Blanco Valkoinen Vit Hvid Hvidt Weiss White Blanc Wit 9 AArgento Prateado Plata Hopea Silver Sølv Sølv Silber Silver Argent Zilver A BOro Dourado Oro Kulta Guld Guld Guldl Gold Gold Or Goud B
5%
4K7= ( 4 - 7 - 2 - B )
1%
4K7= ( 4 - 7 - 0 - 1 - 1 )
COLOR= 2… 5

6
The unit consists out of two PCB’s, one is the main PCB, P8021B and the other
is the left channel input section P8021L.
First we will start with the small P8021L, then we assemble the P8021B.
FTip: The pictures on the packaging can be
used as a guideline.
However, due to possible changes it is not
100% reliable.
CONSTRUCTION
qD1: 1N4148
qD2: 1N4148
qD3: 1N4148
qD4: 1N4148
qD5: 1N4148
qD6: 1N4148
1. Diodes (check the polarity)
CATHODE
D...
qR1: 10K (1-0-3)
qR2: 10K (1-0-3)
qR3: 10K (1-0-3)
qR4: 10K (1-0-3)
qR5: 10K 1-0-3)
qR6: 10K (1-0-3)
qR7: 1K (1-0-2)
qR8: 330R (3-3-1)
2. Resistors (check the color code)
R...
Construction
P8021L

7
qT1: BC557
qT2: BC557
qT3: BC557
qT4: BC557
qT5: BC557
qT6: BC557
5. transistors
qC1: 220p (221)
qC2: 220p (221)
qC3: 220p (221)
qC4: 220p (221)
qC5: 220p (221)
qC6: 220p (221)
3. Capacitors
C...
Construction
qRY1: VR05051AS or eq.
qRY2: VR05051AS or eq
qRY3: VR05051AS or eq
qRY4: VR05051AS or eq
qRY5: VR05051AS or eq
qRY6: VR05051AS or eq.
4-Reed relays (check the position
of the notch)
qSK1: MJ-523AG/B BLACK
qSK2: MJ-523AG/B BLACK
qSK3: MJ-523AG/B BLACK
qSK4: MJ-523AG/B BLACK
qSK5: MJ-523AG/B BLACK
qSK6: MJ-523AG/B BLACK
6. RCA connectors.
Mount them straight and
against the PCB
qSK7: HDR20/26
7. Pin connector. Mount it exactly
as indicated
RY...

8
P8021B Assembly
Construction

9
qJ1... J25
1. Jump wires
qR1: 10K (1-0-3)
qR2: 10K (1-0-3)
qR3: 10K (1-0-3)
qR4: 10K (1-0-3)
qR5: 10K (1-0-3)
qR6: 10K (1-0-3)
qR7: 10K (1-0-3)
qR8: 10K (1-0-3)
qR9: 47K (4-7-3)
qR10: 470R (4-7-1)
qR11: 620R/1% (6-2-0-0)
qR12: 33R (3-3-0)
qR13: 33R (3-3-0)
qR14: 390K/1% (3-9-0-3)
qR15: 33K/1% (3-3-0-2)
qR16: 1K (1-0-2)
qR17: 47K (4-7-3)
qR18: 470R (4-7-1)
qR19: 620R/1% (6-2-0-0)
qR20: 390K/1% (3-9-0-3)
qR21: 33K/1% (3-3-0-2)
4. Resistors (check the color code)
qD1: 1N4148
qD2: 1N4148
qD3: 1N4148
qD4: 1N4148
qD5: 1N4148
qD6: 1N4148
qD7: 1N4148
qD8: 1N4148
qD9: 1N4007
qD10: 1N4007
qD11: 1N4007
qD12: 1N4007
qD13: 1N4007
qD14: 1N4007
qD15: 1N4007
qD16: 1N4007
2. Diodes (check the polarity)
CATHODE
D... R...
qZD1: 20V / 0.6W
3. Zener diode (check the polarity)
CATHODE
ZD...
Construction

10
qR22: 1K (1-0-2)
qR23: 560R/1% (5-6-0-0)
qR24: 1K8/1% (1-8-0-1)
qR25A or R25B: 1K5 (1-5-0-1) (*)
qR26: 1K5 (1-5-2)
qR27: 560R/1% (5-6-0-0)
qR28A or R28B: 1K5 (1-5-2) (*)
* The position of R25 and R28 de-
pends on the supplied IC for IC2
and IC3:
Mount R25B and R28B if type
OPA134 is supplied.
Mount R25A and R28A. If types
OPA604 or TLE2071 are supplied.
qR29: 1K8/1% (1-8-0-1)
qR30: 1K5 (1-5-2)
qR31: 56R (5-6-0)
qR32: 56R (5-6-0)
qR33: 1K (1-0-2)
qR34: 330R (3-3-1)
qR35: 1R (1-0-0)
qR36: 1R (1-0-0)
qR37: 1R (1-0-0)
qR38: 1R (1-0-0)
qR39: 1K/1% (1-0-0-1)
qR40: 1K/1% (1-0-0-1)
qR41: 1K (1-0-2)
qR42: 1K (1-0-2)
qR43: 1K (1-0-2)
qR44: 1K (1-0-2)
qR45: 10K (1-0-3)
qR46: 10K (1-0-3)
qR47: 10K (1-0-3)
qR48: 10K (1-0-3)
qR49: 10K (1-0-3)
qR50: 4K7 (4-7-2)
qR51: 1R (1-0-0)
qR52: 470R (4-7-1)
qR53: 1K5 (1-5-2)
qL1: 1uH (1-0)
qL2: 1uH (1-0)
5. Choke
L...
L...
qIC1: 8P
qIC2: 8P
qIC3: 8P
qIC4: 18P
6. IC sockets
qSK7: 20P (type 96120205)
7. Female header
J...
SK..
Construction