Thermal Arc 300GTSW Pro-Wave, Service Manual

Page: 57 / 130

pro-wave 300gtsw
June 21, 2012
6-19
6.17 Front Panel PCB6 (WK-3988) Test Point Voltages
The test point voltages on the Front Panel Circuit Board should be verified as follows.
1. Set up the contactor closure circuit by installing a jumper between pins 2 and 3 of the REMOTE 8 receptacle;
2. Measure the voltage between test points TP8 and TP0 to be 12VDC.
3. Measure the voltage between test points TP4 and TP0 to be 5VDC.
4. Measure the voltage between test points TP5 and TP0 to be 5VDC.
5. Set up the contactor closure circuit by removing the jumper from the REMOTE 8 receptacle;
6. Measure the voltage between test points TP8 and TP0 to be 3.5VDC.
7. Measure the voltage between test points TP4 and TP0 to be 0VDC.
8. Measure the voltage between test points TP5 and TP0 to be 0VDC.
9. Measure between TP0 and the test points below to verify the voltages given:
TP0 0V Circuit Common
TP1 +5VDC Regulated voltage of control circuit
TP2 +12VDC Regulated voltage of control circuit
TP3 -12VDC Regulated voltage of control circuit
TP6 +4VDC Regulated voltage of control circuit
TP0 TP1 TP3 TP2 TP6 TP8 TP4 TP5
TP7 TP9
Art # A-06121
Figure 6-16: Front panel voltage test points