Conrad Thermostat Variable Temperature Switch Kit With Sensor 192082 Hoja De Datos

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192082

Compare the polarity printed on the electrolytic capacitors once again with the
print on the circuit board or in the component diagram in the construction manual.
Note that depending upon the make, “+” or “-” can be marked on the electrolytic
capacitors!

Has the transistor been soldered correctly? Do its contact pins cross-over?

Does the print on the circuit board match the outlines of the transistor?

Has the IC1 been soldered correctly? Do its contact pins cross-over? Does
the print on the circuit board match the outlines of the IC??

Have the transistor (T1) and the voltage regulator (IC1) been soldered
correctly as per the make and not mixed up with each other (because they
have the same casing)?

Have the LEDs been soldered with the correct polarity?

If one views the light-emitting diode against light, one can see the cathode at the
larger electrode inside the LED. On the printed side of the circuit board the
position of the cathode is marked by a thick line in the casing outline of the light-
emitting diode.

Have the integrated circuits been inserted in the sockets with the correct
polarity?

Notch or point of IC 2 must point to R 8.

Are all the IC-contact pins really inserted in the socket?

It can happen very easily that a contact pin gets bent or skids past the socket
while inserting.

Is there a solder strap or a short-circuit present on the soldering side?

Compare the connections of the conducting paths, which possibly look like an
unintended solder strap, with the diagram (grid) on page 16 of the printed circuit
board and the circuit diagram in the instructions, before you break a conductor
(supposed solder strap)!

To be able to easily ascertain the conductor paths or conductor breaks, hold the
soldered printed circuit board against light and look for these unwanted side-
effects from the soldering side.

Is a cold solder joint available?

Please check each solder joint thoroughly! Check by using a pair of pincers,
whether the components are wobbling! If you suspect a solder joint, then solder it
again to be on the safe side!

Also check that each joint is soldered; it often happens during soldering that
joints are overlooked.

Also keep in mind that a printed circuit board soldered with soldering fluid,
soldering grease or inappropriate soldering tin cannot function. These