Test Point Voltages

WARNING: Before taking magnetron current readings, turn the unit off. Check resistance between “MAG CURRENT” test points.

Reading should be approximately 40K Ohms. If this value is not correct, do not attempt current reading. Damage could result to the meter or personnel injury could result. Contact Fusion UV Systems Customer Service if 40K Ohms reading is not obtained.

After checking resistance, be sure to switch the meter to correct setting for DC voltage reading.

Table 19. Operating Voltages

Test Points

Application

 

Status

 

 

Standby

Lamp On

 

 

 

 

 

 

Photoresistor Test (TP101 and TP102)

P300M/ P300MQ

12 VDC

0-6 VDC

 

 

 

 

Magnetron Current Test MAG A - COM

P300M/P300MQ

0

0.650-0.750 VDC

(TP105 and TP106)

 

 

 

 

 

 

 

Control Card Removal/Replacement

This unit must be disconnected and returned to Fusion UV Systems for repair or direct replacement. The control card cannot be repaired in the field.

1.Remove the six screws from the power supply cover. Remove the cover.

2.Remove all connectors. Remove three screws at the top of the card. Slide the card approximately an inch away from the front panel and raise it up out of its bottom track.

3.To install a replacement card, reverse this procedure. Note the location of connectors in Figure 44 on page 109 and reinstall as shown.

Installation, Operation, and Maintenance Manual # 509252 Rev R 107