Hypertherm Powermax105 Service Manual - Manual (Page 188)

TroubleshooTing and sysTem TesTs
8-50
powermax
105 Service Manual
test 5 – Flyback circuit (DC minor voltages)
Symptom: Minor voltages are not present.
Note: Wear proper personal protective equipment (PPE) before testing powered equipment.
The flyback circuit is the source of the minor DC voltages in the power supply. It provides +3.3 VDC, +5 VDC, +24
VDC, and +48 VDC.
Check the voltages as described in the table. If a value is not within ±15%, perform the appropriate test later in this
section.
Volts DC test points (use chassis for negative)
All units
+48 J1 – Pin 1
+24 J5 – Pin 1
+5.0 J3 – Pin 3
+3.3 J15 – Pin 4
DSP board
J15, Pin 4
Power board