DZ HT-7, Инструкция по сборке, Страница: 6 / 44

Page 6
1. As you tighten a screw, it is
very important that you do
not strip the threads. All
screws should fasten smoothly
without resistance. If a
screw appears to be hard to
fasten, something else is
probably wrong—a cable could
be in the way, you are trying
to use the wrong size screw
or something else is wrong.
DO NOT FORCE SCREWS! Instead,
inspect the assembly care ‐
fully and try to see why you
are having difficulty. Abbre ‐
viations: PH = panhead. FH =
flathead. M/S = machine
screw.
2. All references to left and
right, front and back are
with the chassis in an orien ‐
tation such that the speaker
faces you and the text reads
correctly from left to right.
3. Each circuit part has its own
component number (R1, L4, Q3,
etc.). R1 on one assembly
will not be the same as R1 on
a different assembly, so be
sure you are looking at the
right set of parts when com ‐
paring part numbers with the
printed parts list. Check off
each part at the beginning of
each section to make sure all
the parts are there. If you
find any missing, give us a
call or email us and we will
rush a replacement to you.
4. Most electronic kits that are
returned for service have
poor soldering jobs. Please
take a moment to familiarize
yourself with proper solder ‐
ing technique. And do not,
under ANY circumstances, use
corrosive (“acid ‐ core”) sol ‐
der! That will void your war ‐
ranty and render your kit in ‐
operative. Also be sure to
avoid the use of products
that may be called solder but
are really glue. Soldering
should only be done in an
area with good ventilation
and with a properly heated
soldering iron.
5. Capacitors are identified by
their type — disk, polysty ‐
rene, polypropylene, electro ‐
lytic, trimmer, etc.) and ca ‐
pacitance values are in
microfarads (uF) or pico ‐
Farads (pF, often pronounced
“puff”). Polarized types have
the positive pin marked on
the silkscreen and also have
a square pad.
6. Inductors are represented ei ‐
ther by their inductance in
nanoHenries (nH), microHen ‐
ries (uH), milliHenries (mH)
or by the number of turns in
the coil if you are doing the
winding.
7. Diodes are marked with a band
on the cathode end. The PC
boards have a bar silk ‐
screened across one side of
the component outline and a
square pad which identifies
the cathode.
General Assembly Notes