SYNTHESIS TECHNOLOGY
PAGE 5
MOTM-510 ASSEMBLY 7/11/04
WWW.SYNTHTECH.COM
washed in the sink. The flux is OSHA approved for flushing down the drain, so don’t worry
about that! A soft brush is used to gently scrub the board. We recommend a ‘fingernail brush’,
which is about 1” x 2” and can be found for about $1.
The other type of solder is called ‘No Clean Flux’;
because as the name implies it does not
require washing. This solder is used for wiring the pots, switches, jacks, etc. This solder is
harder to use on the pc board; because even when melted, it is not very fluid (about the
consistency of toothpaste). We will use it VERY SPARINGLY on the pc board.
OK, let’s get started on the board!
PART #1: SOLDERING THE RESISTORS
Since there are more resistors than anything else, we will start here. If you do not know the
resistor color code, refer to the parts list. Resistors are not polarity sensitive, but the board will
be easier to debug (and look nicer) if you point the first color band in the same direction for all
the parts. The color code is also in the README FIRST document that every customer receives
with his or her first order.
You will start by soldering in ALL of the resistors.
Find
the
RESISTOR
bag.
Find the MOTM-510 blank pc board. There is a copy (larger than actual size) of the
silkscreen which shows where the parts go at the end of this document. It will be useful
if you locate the part on the print first, put the part in the board, then ‘check off’ the
silkscreen. All parts are inserted from the side of the board with the white silkscreen
(the “top” side).
We will stuff the resistors by value to make things easier. The resistors are inserted on
a 0.4 inch spacing. The important thing is to be sure that the part is sitting all the way
down on the board. Push the leads in the holes, push the part on the board, and then
bend the leads on the bottom outwards to a 45 degree angle (roughly!). This is called
‘cinching the leads’: and keeps the part from falling out! From the bottom of the board,
solder (using the organic flux), applying heat to the pad for about a half second first,
then applying just enough solder to make a small puddle that looks like a tiny pyramid.
Enough solder should flow in the hole such that on the top (component) side, a small
amount is on the top pad as well
The rule of soldering: don’t use too much, you can always add more! Cut the leads flush
with the top of the solder joint with your diagonal cutters.
NOTE: later in the assembly, you will need 3 scraps of resistor lead. Be sure to
save some!
ANOTHER NOTE! The AD538 IC is VERY EXPENSIVE to replace ($55). There
is a socket provided, but you MUST BE CAREFUL when inserting the IC into
the socket later in the assembly. Be SURE you solder the socket in the correct
orientation! YOU HAVE BEEN WARNED!
Содержание MOTM-510 The WaveWarper
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