9. MAINTENANCE
●
Tip maintenance
High temperatures shorten tip life and may
cause thermal shock to components.
Always
use the lowest possible temperature when
soldering. The excellent thermal recovery
characteristics of the Hakko 942 ensure e
f
fec-
tive
soldering
at
low
temperatures.
2. Cleaning
Always clean the soldering tip before use, to
remove
any
residual
solder
or
flux
adhering
to
it.
Use a
clean and moist
cleaning sponge (provided
with the Hakko 942) or the Hakko 599 tip
cleaner . Contaminants on the tip have many
deleterious e
f
fects, including reduced heat
conductivity , which
contribute
to
poor
soldering
performance.
3. After use
Always clean the tip and coat it with fresh solder
after use. This guards against oxidation.
4. When the unit is not being used
and the auto power shutoff is not
active.
Never allow the unit to idle at a high temperature
for extended periods. This will allow the tip to
become oxidized. Turn the power switch OFF . If
it is to be out of service for several hours, it is
advisable to pull the power plug as well.
5. Inspecting and cleaning the tip
This procedure, if
followed
dail
y
, will
materially
add to tip life.
a. Set the temperature to 250
°
C (482
°
F).
b. When the temperature stabilizes, clean the
tip (see 2, above) and check the condition of
the tip. If the tip is badly worn or deformed,
replace it.
c. If the solder plated part of the tip is covered
with black oxide, apply fresh solder
, con-
taining flux, and clean the tip again. Repeat
until all the oxide is removed, then coat the
tip with fresh solde
r.
d. Turn the power OFF and remove the tip,
using the heat resistant pad. Set the tip aside
to cool.
e. Remaining oxides, such as the yellow
discoloration on the tip shaft, can be re-
moved with isopropyl alcohol.
CAUTION:
NEVER file the tip to remove oxides!
1. Tip temperature
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