Red-D-Arc EXTREME 360, Technical Manual

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Always check unit before applying power (see Sections 6-1 thru 6-18).
TM-229 409 Page 41 Extreme 360
6-26. Control/Auxiliary Power Board PC1 Test Point Values
a) Tolerance −
±
10% unless specified
b) Reference − to circuit common
(lead 42) unless noted
PC1 Voltage Readings
Receptacle Pin Type Value
RC1
Y Do not measure − high voltage present.
RC2
Y High voltage present. Voltages on this receptacle can exceed 900 volts DC from chassis
(GND).
NOTE: All pins on this receptacle are referenced to the primary − Bus
1 Input Primary (+) bus; regulated to 940 volts dc with respect to primary ( − ) bus.
2 Not used
3 Not used
4 Input Primary (+) rectifier; rectified primary line volts.
RC3
Y
High voltage present. Voltages on this receptacle can exceed 900 volts DC from chassis (GND).
NOTE: All pins on this receptacle are referenced to the primary − Bus
1 Input Do not measure − Boost inductor current feedback; 1 volt dc per 16 amps of boost inductor current
2 Output +15 volts dc; regulated with respect to primary ( − ) bus
3 Output − 12 volts dc; regulated with respect to primary ( − ) bus
4 Output Do not measure − Boost IGBT gate drive signal
5 Do not measure − Boost IGBT gate drive signal return
6 Precom Circuit common referenced to primary ( − ) bus
7 Precom Circuit common referenced to primary ( − ) bus
8 Precom Circuit common referenced to primary ( − ) bus
9 Input Do not measure − HF transformer current sense CT; senses overcurrent in HF transformer primary
10 Do not measure − HF transformer current sense CT return
11 Output Precharge relay coil return; 0 volts dc = relay contacts open, − 12 volts dc = relay contacts closed
12 Not used
13 Input Do not measure − Test point, used to test board only
14 Input Do not measure − Test point, used to test board only
RC5 Y High voltage present. Voltages on this receptacle can exceed 900 volts DC from chassis
(GND).
NOTE: All pins on this receptacle are referenced to the primary − Bus
1 Output Control transformer primary; 665 volts ac rms with respect to RC5 pin 3
2 Not Used
3 Output Control transformer primary; 665 volts ac rms with respect to RC5 pin 1