TAMS S88-Booster, Руководство пользователя

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English S88-2
Page 28
voltage sustaining capability higher than required is always
possible.
Diodes
Diodes allow the current to pass through in one direction only
(forward direction), simultaneously the voltage is reduced by
0,3 to 0,8 V. Exceeding of the limit voltage always will destroy
the diode, and allow current to flow in the reverse direction.
The diode type is printed on the body.
Diodes must be mounted in a given direction. The negative
end is marked with a ring. This is shown in the PCB layout.
Zener diodes
Zener diodes are used for limiting voltages. In contrast to
„normal“ diodes they are not destroyed when the limit voltage
is exceeded.
Rectifiers
Rectifiers convert alternating into direct voltage, they have
hardly no influence on the level of the voltage. They have four
pins: two for the input voltage (a.c. voltage) and two for the
output voltage (d.c. voltage). The pins for the output voltage
are polarized. The pin connections are printed on the housing.
As usual with wired components the longer connecting pin is
the positive pole.
Integrated circuits (ICs)
Depending on the type, ICs fulfil various tasks. They are
polarized and therefore have to be mounted in a certain
direction. The most common housing form is the so-called
"DIL"-housing, from which 4, 6, 8, 14, 16, 18 or more "legs"
(pins) are arranged along the long sides. The mounting
orientation is shown by a semicircular or circular marking at
the end of the housing, which is also shown on the PCB
layout.