Hypertherm Powermax125 Service Manua - Manual (Page 156)

156 Powermax125 Service Manual 808070
8 – Troubleshooting and System Tests
Test 5 – Flyback circuit (DC minor voltages)
Symptom: Minor voltages are not present.
 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 Table 12. If a value is not within ±15%, perform the appropriate test later in this
section.
Table 12
Figure 25
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