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User Manual
8.3.1
Controller Module Removal / Replacement
If a fault is found that requires the replacement of the Controller Module (Assembly A3) follow
the following steps and refer to Figure 8-1 for the module locations:
1. Turn off the front panel On/Off switch. Remove any input power from the rear panel terminal
block by disconnecting or unplugging or otherwise disconnecting the AC input.
2. Allow time for any caps to discharge. This may take several minutes.
3. Remove the top cover.
4. Remove the screws along the bottom of the front edge that hold the front panel to the
chassis.
5. Remove the two nuts in the top corners of the front panel that hold the front panel to the
chassis.
6. Disconnect the system interface (40 pin) ribbon cable from the controller and disconnect the
power ribbon cable (10 pin). You can now remove the front panel assembly from the
chassis.
7. Place the front panel assembly on a static free work surface.
8. Remove the two front panel knobs. Requires a small Allen wrench.
9. Remove 5 screws that hold the controller PCB assembly to the front panel. The controller
assembly can now be removed.
10. Any new controller that is installed must be correctly configured for the Voltage and Current
ranges of the KDC model. The voltage and current limits and the serial number stored in
the NVM configuration data of the controller must also be set correctly using the RS232C
interface. The KDCGUI may be used for this purpose if the authorized password is known.
KDC Series II DC Power Supplies
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