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S88-3
3.4. Assembly
Proceed according to the order given in the list below. First solder the components on the
solder side of the PCB and then cut the excess wires with the side cutter. Follow the
instructions on soldering in section 3.2.
Caution:
Several components have to be mounted according to their polarity. When soldering these
components the wrong way round, they can be damaged when you connect the power. In
the worst case the whole circuit can be damaged. At the best, a wrongly connected part will
not function.
1.
Resistors
R1, R2, R3
Mounting orientation of no importance.
Please note: There is a plated-through hole under the
resistor R3. Do not use this to solder the resistor!
2.
IC sockets
Mount the sockets that way, the markings on the sockets
show in the same direction as the markings on the PCB
board.
3.
Resistors
R4 to R19
Solder the resistor that way, their bodies are standing
upright on the PCB.
Mounting orientation of no importance.
4.
Resistance networks
Observe the mounting orientation!
The common connection is marked with a cross, which is
also shown in the assembly print.
5.
Ceramic capacitors
Mounting orientation of no importance.
6.
Transistor
Observe the polarity!
The cross section of transistors for a low power rating in
SOT-packages is shown in the PCB layout.
7.
Solder pin
8.
Terminal strips
Put together the double terminal strips before mounting
them.
9.
RJ-45 sockets
10.
ICs in DIL-housing
Insert the ICs into the soldered socket.
Do not touch the ICs without first discharging yourself by
touching a radiator or other grounded metal parts.
Do not bend the "legs" when inserting them into the sockets.
Check that the markings on the PCB, the socket and the IC
show to the same direction.
Assembling the kit | 13
