ESSENTIAL INFORMATION
BUILD INSTRUCTIONS
CHECKING YOUR PCB & FAULT-FINDING
MECHANICAL DETAILS
HOW THE KIT WORKS
CREATE YOUR OWN SPEAKER DOCK WITH THIS
DELUXE STEREO AMPLIFIER KIT
Version 2.0
Deluxe Stereo Amplifier Essentials
www.kitronik.co.uk/2141
Build Instructions
Before you start, take a look at the Printed Circuit Board (PCB). The components go in the side with the writing on
and the solder goes on the side with the tracks and silver pads.
1
PLACE RESISTORS
Start with the five resistors:
The text on the PCB shows where R1, R2 etc go.
Ensure that you put the resistors in the right place.
PCB Ref
R1
R3 & R4
R5 & R6
Value
1K
4.7
10K
Colour Bands
Brown, black, red
Yellow, purple, gold
Brown, black, orange
2
SOLDER THE IC HOLDER
Solder the Integrated Circuit (IC) holder in to IC1. When putting this into the board, be sure to get it
the right way around. The notch on the IC holder should line up with the notch on the lines marked
on the PCB. Once this has been done insert the 8 pin IC into this socket, making sure that the notch
on the device matches the notch on the IC holder.
3
SOLDER THE CERAMIC DISC CAPACITORS
There are two ceramic disc capacitors. These should be soldered into C6 and C7. It does not matter
which way around they go.
SOLDER THE LED
4
Solder the LED into the PCB where it is labelled LED1. When putting it into the board, make sure
that the flat edge on the LED matches the outline on the PCB.
SOLDER THE SWITCH
5
Solder the PCB Mount Right Angled On / Off Switch into SW1. The row of three pins that exit the
back of the switch must be soldered but it doesn’t matter if you can’t solder the other two pins.
SOLDER THE POWER SOCKET
6
Solder the DC power socket into the PCB where it is labelled CONN1.
Deluxe Stereo Amplifier Essentials
www.kitronik.co.uk/2141
SOLDER THE ELECTROLYTIC CAPACITORS
7
Now solder in the five electrolytic capacitors (an example is shown right). The capacitors have text
printed on the side that indicates their value. The capacitors are placed as:
C1 and C2 = 100F.
C3 = 10F.
C4 and C5 = 470F.
Make sure that the capacitors are the correct way around. The capacitors have a ‘-’ sign marked on
them, which should match the same sign on the PCB.
SOLDER THE DUAL POTENTIOMETER
8
Solder the potentiometer into the PCB where it is labelled R2. Make sure that the volume knob is
facing away from the PCB.
CONNECT THE SPEAKERS
9
The kit is supplied with a metre of twin cable. This cable will be used to connect the two speakers.
You will need to cut this to the required length for each speaker in your enclosure design.
Take each piece of wire that you have cut off and strip the ends of the wire. Connect one end of
each to the two terminals on the speaker (shown right), and the other end of each to the terminals
on the PCB marked ‘SPEAKER1’ and ‘SPEAKER2’, after feeding it through the strain relief hole. It
does not matter which way around these connections go.
ATTACH THE BATTERY CLIP
10
The PP3 battery clip should be attached to the terminals labelled ‘POWER’. Connect the red wire
to ‘+’ and the black wire to ‘-’ after feeding it through the strain relief hole.
CONNECT THE AUDIO CABLE
11
The stereo Jack / iPod lead should be connected to the ‘INPUT’ terminal. First, feed the wires
through the strain relief hole. The black wire should be connected to the terminal labelled ‘BLK’.
The other two can go the either of the two remaining inputs.
Deluxe Stereo Amplifier Essentials
www.kitronik.co.uk/2141
Checking Your Amplifier PCB
Carefully check the following before you insert the batteries:
Audio equipment may become damaged if connected to an incorrectly built amplifier.
Check the bottom of the board to ensure that:
All holes (except the 4 large (3mm) holes in the corners) are filled with the lead of a component.
All these leads are soldered.
Pins next to each other are not soldered together.
Check the top of the board to ensure that:
The speakers, power lead etc. are connected to the right place.
The ‘-’ on the capacitors match the same marks on the PCB.
The colour bands on R1 are brown, black, red.
The colour bands on R3 & R4 are yellow, purple, gold.
The colour bands on R5 & R6 are brown, black, orange.
C3 is a 10F capacitor.
The battery clip red and black wires match the red and black text on the PCB.
The notch on the IC is next to C1 & C4.
The flat edge on the LED matches the outline on the PCB.
Deluxe Stereo Amplifier Essentials
www.kitronik.co.uk/2141
Fault
Fault Finding
finding flow chart
Check
The power switch is on
For dry joints on the power
connectors (POWER and
CONN1), SW1, LED1 and R1
The battery connector is
connected to the POWER
terminal and the red and black
wire are the correct way around
C3 and IC1 pins 3 & 4 for shorts
Start
Power up the board with it
connected to a music source
No
Is the power
LED on?
Yes
Are the speakers
making any kind
of sound?
Check
The volume is not set to the
minimum
IC1 is in the right way around
The input connector is in the
right place and the black wire is
the connected to the Blk terminal
IC1 for dry joints on pins 2 & 4
No
Yes
No
Is the sound
coming out of
both speakers?
Which
speaker is
there no sound
from?
Speaker 1
Check
The wire connections on speaker
1 for dry joints on the PCB and
speaker
The black input connector is in
the Blk Input connection and
In1 for a dry joint
R2, R5, C4 & IC1 pins 1 & 7 for
dry joints
R1 is in the correct place
C1 and IC1 pins 1 & 2, 7 & 8
for shorts
Speaker 2
Check
Yes
Go to
next page
The wire connections on speaker
2 for dry joints on the PCB and
speaker
The black input connector is in
the Blk Input connection and
In2 for a dry joint
R2, R6, C5 & IC1 pins 3 & 6 for
dry joints
R2 is in the correct place
C2 and IC1 pins 2 & 3, 5 & 6
for shorts
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