Hypertherm HT4001 Plasma Arc Cutting System - Manual (Page 139)

MAINTENANCE
7-98
HT4001
Instruction Manual 6-13
Figure 6-2 Power Distribution Board PCB1
6. Measure voltage at power distribution board PCB1. Refer to Figure 6-2 for detail of PCB1. Look on the board for
fuses F1, F2 and F4. Measurements between each fuse and chassis ground should be as follows:
F1: 24 VAC
F2: 120 VAC
F4: 120 VAC
If voltages are not present, or incorrect at one or more of these points, disconnect power and troubleshoot
PCB1 fuses and associated pins, connectors and wiring between power distribution board connector REC1 and
control transformer secondary T1.
Also, check wiring and connections between T1, CB1, CON1, and L1 and L2.
Repair and/or replace defective component(s) if necessary.
F4 F2 F1