Thermadyne CE CutMaster 75, Service Manual

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SERVICE 5-4 Manual 0-2869
5.06 Left Side Internal Component
Parts Replacement
Refer to subsection 6.05 for Left Side Internal Compo-
nent Replacement Parts and overall detailed drawing.
WARNING
Disconnect primary power from the source before
opening or disassembling the power supply.
A. Fuse Replacement
1. Remove the cover per subsection 5.04-A.
2. Locate the Fuse near the top edge of the Main
Power PC Board and remove the Fuse from the
fuse holder.
3. Install replacement fuse.
4. Reinstall the cover.
B. Main Input Contactor Replacement
1. Remove the cover per subsection 5.04-A.
2. Label all wires connected to the Input Contactor.
3. Disconnect wires to the Input Contactor from the
input cable (or from the EMI filter on CE units).
4. Disconnect all other wires connected to the Input
Contactor.
5. Remove the two nuts and washers securing the
Input Contactor to the base of the power supply.
6. Position the replacement Input Contactor with the
row of connectors labeled L toward the rear of the
Power Supply. Fasten in place with the hardware
removed previously.
7. Complete the wiring connections as shown below.
NOTE
It is important that wires are installed correctly, as
shown, to prevent damage to the unit.
8. Reinstall cover.
Art # A-03212
L1 L2 L3 L4
T1
T2
T3
T4
#13
#12
#78
L1
L2
Input
Side
#5
#4
#3
#2
#1
208/230-Volt Input Contactor
A-03194
Main Contactor
#13
#5
L1 L2 L3
T1
T2
T3
To E3
Connections to
Main PCB
#4
#12
To E1
To E2
Input Side
L1
L3
L2
400-Volt, 460-Volt, and 600-V Input Contactor (460-
Volt 3-phase input shown)