Calibration
Calibration Setup
80
Operating Manual for XFR 1.2kW Series Power Supply
Accessing
Calibration
Potentiometer
You will need to remove the power supply’s cover to access the programming and
readback calibration potentiometers which are located on the A2 PCB. See
Figure 5.1 to locate the potentiometers.
Removing Option Card
If there is a GPIB or RS-232 option card (PCB) installed
inside the power supply, you will have to remove it to access the calibration
potentiometers.
Tool Required: Phillips #2 screwdriver
1. Turn OFF the power supply. Disconnect AC Power. Remove the cover.
2. Remove four screws from their standoffs inside the power supply to release the
option card.
3. Remove two screws at the rear panel to release the option card’s subplate.
4. Unplug the ribbon cable connectors from the option card. Lift out card.
WARNING
Disconnect AC power from the unit before removing the cover. Even with the
front panel power switch in the OFF position, live line voltages are exposed
when the cover is removed. Repairs and adjustments must be made by
experienced service technicians only.
WARNING
Use a non-conducting, straight-bladed screwdriver to adjust the trim pots.
!
CAUTION
Follow established antistatic procedures. There are static-sensitive parts on the
printed circuit boards.
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