Checking and Adjusting the 5 Volt DC Power Supply
SWF Standard Single Head –T1201 and T1501
Turn the machine on and wait for it to finish powering up completely. Have your assistant carefully touch
the test leads to the needles and hold them there. Try to avoid moving or jiggling the leads during the
adjustment. Using the alignment tool (preferred) or a small screwdriver, carefully insert the tip into the
slot of the potentiometer (fig.12) and turn clockwise very slowly and watch the reading on the meter to
see the changes. In some cases, there may be some paint covering the slot of the potentiometer. It may
be necessary to clean the top surface of the potentiometer before you can insert the tip. In this case,
gently scrape the top with the tip of a small screwdriver to remove the paint. Now insert the tip of your
tool and make the adjustment. Once you have a reading of 5.03 to 5.08, (fig.13) stop and let the meter
settle to a constant reading. If you have gone too high, turn the potentiometer counter clockwise to
decrease the voltage. When the voltage remains constant within the range, remove the test leads and
your adjusting tool and then turn the machine off.
Return the power supply to its original position and replace the screw
that you removed earlier so that the power supply is securely back in
its place. Slip the cable ties back over the bolts and replace the cover
plate. Slide the table top back in place and replace the screws.
Remove the needles from the control panel connector, close the panel
and replace the thumbscrews. You are finished.
To Previous Page
Loading...
Need help?
General
