Changing the fuse
If the mains switch is not lit when the station is turned on although the outlet is live, separate the soldering
station from the mains by pulling the power plug.
The fuse holder is at the bottom of the soldering station, with the fuse inserted into it.
Unscrew the fuse holder by turning it counter-clockwise using a suitable screw driver. Afterwards, you can
take out the fuse holder with the fuse inside it.
Replace the blown fuse with a new fuse of the same type and with the same nominal data (see the label on
the fuse or on the nameplate of the soldering station, also see chapter “Technical data”).
Never use a fuse with other nominal data. Never bridge the fuse! There is a risk of fire!
Replace the battery compartment lid in the correct way and lock it by slightly turning it to the right, in clock-
wise direction.
If the fuse goes out again after starting the soldering station, turn off the soldering station and unplug the
power cord from the power outlet. Don’t use the soldering station anymore; get it checked by an expert.
Maintenance and cleaning
• The soldering station is maintenance-free, except for the occasional replacement of the soldering tip or
sponge.
• Before carrying out any cleaning of the soldering station, it must be switched off and the mains plug must
be disconnected from the mains socket.
Leave the soldering rod and the soldering station to cool down sufficiently.
• The exterior of the soldering station should only be wiped with a clean, soft, dry cloth.
Do not use aggressive cleaning agents or chemical solutions that could damage the housing (discolouring)
or impair operation.
• The soldering tip does not require any special cleaning. It is sufficient to clean it occasionally from flux
residues or excessive solder using the wet sponge.
The soldering tip must be well tin-coated before switching the soldering station off. The prevents
a corrosion of the soldering tip.
Disposal
Electrical and electronic products do not belong in household waste!!
Please dispose of the device when it is no longer of use, according to the current statutory
requirements.
Technical data
Soldering station type
ST50-A
ST80-A
ST100-A
Item no.
791784
791785
791786
Operating voltage
230 V/AC, 50 Hz
Power input
max. 75 W
max. 110 W
max. 120 W
Soldering iron voltage
26 V/AC
Soldering iron output
50 W
80 W
100 W
Temperature of the soldering
tip
150 °C to 450 °C (adjustable)
ESD/Potential equalisation
socket
hose connection (Ø 4 mm)
Safety type
5 x 20 mm
Fuse value
250 V, 400 mA,
slow-blow
250 V, 630 mA,
slow-blow
250 V, 630 mA,
slow-blow
Cable length of the
soldering station
approx. 110 cm
Dimensions of the soldering
station (D x W x H)
150 x 160 x 113 mm
Dimensions of the soldering
iron holder (D x W x H)
193 x 70 x 103 mm
This is a publication by Conrad Electronic SE, Klaus-Conrad-Str. 1, D-92240 Hirschau (www.conrad.com).
All rights including translation reserved. Reproduction by any method, e.g. photocopy, microfilming, or the capture in electronic data
processing systems require the prior written approval by the editor. Reprinting, also in part, is prohibited. This publication represent the
technical status at the time of printing.
© Copyright 2014 by Conrad Electronic SE.
b) Connection
• Connect the round plug of the soldering iron to the corresponding socket on the front of the soldering sta-
tion (pay attention to the correct orientation of the round plug) and screw it in manually (do not use tools!).
• Right next to the socket for the soldering iron there is a high-impedance potential equalization socket. A
high-impedance potential equalization socket enables application on MOS components or ESD worksta-
tions and protects you from static charge during soldering. Connect the socket with your ESD workstation
using a suitable cable, if necessary.
• Connect the mains plug to an appropriate earthed mains socket.
c) Operation
• Switch the soldering station on using the power switch (“I” = On). The control lamp at the switch should
now light up.
• Regulate the desired temperature of the soldering iron with the adjusting knob. Note the information on the
solder you use if necessary, e.g. to check what temperature is optimal.
The soldering rod requires some time to reach the set temperature. Wait for about 2 - 3 minutes before
starting the first soldering work.
During the heating phase, the LED above the knob will flash at short intervals. When the set tip tempera-
ture is reached, the LED will flash at long intervals.
• On top of the soldering iron holder there is a small metal bowl, which can be used e.g. as a storage area
for solder wire, stranded wire, etc..
• The solder should melt instantly upon contact with the soldering tip. Rising smoke is caused by evaporat-
ing flux contained inside the solder.
Regulate the temperature to higher range for larger soldering areas to execute the soldering process more
quickly. Lower the temperature during breaks. This saves energy and extends the durability of the solder-
ing tip.
• Always put the soldering rod on the holder when it is heating up or during breaks from soldering.
Make sure that the soldering tip is well tin-coated when taking breaks or before switching the soldering
station off.
Mechanical damage to the soldering tip destroys the protective coating there and thus reduces the service
life considerably.
Make sure the spots to be soldered on the work piece are clean. Use appropriate installation cables only.
Acidic solder can damage the soldering tip or the work piece.
• Heat up the soldering location with the soldering tip and add solder simultaneously. Remove the solder
from the soldering location; then, remove the soldering tip.
Execute the soldering process quickly since the workpiece may be damaged otherwise (e.g. lifted conduc-
tors, overheated elements, etc.).
• Let the soldering location cool down. It may take 1 - 2 seconds for the solder to harden depending on the
size of the soldering location. Do not move the soldered component or cable during that time; otherwise, a
so-called “cold soldering point” may be the result. This is a soldering point with dull silver look, which does
not provide good electrical contact nor good mechanical fixation.
A faultless soldering point, on the other side, shines similar to chrome.
• Clean the soldering tip occasionally from flux residues using the damp sponge. To do this, only briefly rub
the soldering tip along the sponge.
Do not press the tip into the dry cleaner or the damp sponge into it; instead, always keep the tip never too
long on the dry cleaner or on the damp sponge.
If there is too much solder residue on the dry cleaning unit, it can be removed and re-inserted in a different
orientation. First, lift off the metal cover from over the dry cleaning unit.
A worn out dry cleaner can be exchanged for a new one. This is available as an accessory (see e.g. on the
Internet at www.conrad.com on the product page). The same applies to the sponge.
• Insert the soldering rod into the holder after finishing with the soldering work. Switch off the soldering sta-
tion (switch position “O” = OFF). The control lamp at the switch goes out.
It takes at least 10 minutes for the soldering rod to cool down. Do not touch soldering tip or
holder during that time, risk of burns! The same applies to changing the soldering tip.
The soldering station must be completely cooled down before storing it! There is a risk of fire, if
this is not observed!
Change of soldering tip
Due to the underlying principle, the soldering tip is under mechanical load during soldering. This results in
the soldering tip to become blunt so that a precise soldering is no longer possible at smaller workpieces. In
this case, the soldering tip can be replaced with a new one.
Soldering tips are also available as accessories, with various shapes to choose from. The small-
er the tip, the finer the soldering that can be performed. Wide tips are used for coarser soldering.
Proceed as follows to replace the soldering tip:
• Turn off the soldering station and let the soldering iron cool down completely.
• Loosen the knurled metal cap nut from the soldering iron and pull the bracket off.
• Carefully pull the soldering tip in a straight line from the ceramic heating element of the soldering iron.
The ceramic heating element must not be mechanically stressed. In case of damage to the
ceramic heating element, the warranty expires!
• Insert a new tip on to the ceramic heating element.
• Place the cap nut in its position and tighten it carefully. Do not use force when screwing; do not use any
tool!
