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C4 Manual Rev 7.5.2
9.7 Troubleshooting
9.7.1 Servicing Considerations - Service WARNINGS
WARNING: Sigma Systems C4 Controllers obtain power from the chamber or
platform to which they are connected. The controllers do not have protective side
covers on the chassis. It is imperative to disconnect the power to both the chamber
or platform and the controller (if separate) from the power source before removing
the controller. Look for an optional separate power cord going to the controller. If
the controller is equipped with a separate power cord, disconnect that cord also
before removing the controller. FAILURE TO HEED THIS WARNING WILL
LIKELY RESULT IN SEVERE DAMAGE TO THE CONTROLLER AND DANGER
OF HIGH VOLTAGE ELECTRICAL SHOCK TO THE USER.
9.7.2 Before you go any further...
Make sure you have the most recent firmware for your C4. A number of problems
for each of the areas discussed in this troubleshooting section have been addressed
with firmware upgrades over the years. To check the firmware version number,
simply turn the controller off and back on. The version number will be displayed
for 2.5 seconds (See Section 3.1.1).
As of the date of this manual, the current firmware version is 7.4.0. Any other
version is older, including versions 10 and 12. If you have other than the current
firmware, see Section 3.2.
9.7.3 Diagnosing and Solving Hardware Problems
Most hardware related problems are best left to the technicians at Sigma
Systems.
If you are having problems with the controller stopping or locking up at
unexpected times, check the ground connections for the power source. Also review
Section 9.7.4 in this manual for some tips on noise immunity. If the problem
persists, you may be able to obtain a noise suppression kit from Sigma that will
help. If your controller uses power from the chamber or platform, it is possible to
install an optional separate power cord for the controller so that it may have it’s
own clean power source.
If the problem relates to the display getting scrambled, the cause is likely static
discharges in or near the front panel. Especially if the environment is carpeted,