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type CRC3-36, brand CRC, Belgium. If you cannot get this oil, you can
order it from the factory.
This cleaner contains a non-aggressive, non-permanent solvent that
dissolves hardened fat and grease effectively. The second component is a
good, non-hardening, penetrating oil that protects the cleaned surface for
a long time. CRC3-36 comes as aerosols that make it easy to apply the
agent.
Using CRC3-36 with pushbutton switches is very easy. Remove a module
and put it on a table so that you can see the topside of the switches.
Press the knob of the aerosol tin carefully while you put the end of the
little tube that comes the tin next to the locker block at the top of the
switch. By pressing the knob carefully, you can produce oil foam. Apply
approximately 1 cubic cm of this foam to each switch that has to be
cleaned. Wait some minutes before you operate each switch 5 to 10 time.
With this procedure, you can keep all the switches in a good shape for an
unlimited period.
DO NOT USE ANY KIND OF CONTACT SPRAYS!
DO NOT USE VASELINE OR SIMILAR GREASE!
DO NOT DIP AN ENTIRE MODULE INTO A CLEANING BATH!
Please follow these rules to avoid trouble. Once you have applied
conventional contact spray to a module, you have to use this repeatedly.
There is no way to remove the spray out of switches or faders unless these
components are replaced. Some technicians use Vaseline as a protection
against corrosion. The biggest problem with Vaseline is that it starts to
melt when the temperature is higher than 40 °C. If Vaseline is used for
the cleaning of switches, you have to deal with the problem that after the
temperature exceeds 40 ° C, the entire contact area of the switch will
be covered in Vaseline. As soon as the temperature drops down below
40 degrees, the fat hardens again. This causes considerable contact
problems. If you put an entire module into a cleaning bath, for instance
of an ultrasonic cleaner, the only effect is, that you distribute all the dirt
equally to the entire module. This means that the dirt will be inside pots,
switches, and everything else. Modules that were treated in this way, will
never work properly again.
Screws
After a period of about 4 years, the power supply unit should be
opened and all screws of the transformer and the prints should be re-
tightened. The thermal situation in a power supply makes it likely that
screws in terminator blocks will loose their contact pressure for the high
temperature difference between the on and off state.
