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Electrical Tests
309292S 19
Test Power Supply Resistance
1. Remove the power supply (18), page 30.
2. Remove the turbine alternator (19) from the power
supply, page 31.
3. Measure resistance from the power supply's ground
strips (EE) to the spring (18b). See F
IG. 7.
4. The resistance should be 95-105 megohms for the
PRO Xs3, and 135-150 megohms for the PRO Xs4.
If outside this range, replace the power supply. If in
range, proceed to the next test.
5. If you still have problems, refer to Electrical Trou-
bleshooting on page 23 for other possible causes
of poor performance, or contact your Graco distribu-
tor.
6. Be sure the spring (18b) is in place before reinstall-
ing the power supply.
Fig. 7. Test Power Supply Resistance
ti1599a
EE
18b