REPLACEMENT PROCEDURES
5-6
Manual 0-2972
F. Input Diode Replacement
WARNINGS
Follow the electrostatic discharge instructions in-
cluded with the component to prevent damage to
the component.
Thermal pads and the large flat surface on the back
of diodes must be kept clean. Thermal pads must not
be allowed to pick up any foreign material. A very
clean installation between the module and mount-
ing plate is essential for proper operation.
1.
Remove cover per Subsection 5.04-A.
2.
Label and disconnect wires from the Input Diode.
3.
Remove screws securing Board in place. Remove
board and its screws from the power supply.
4.
Use isopropyl alcohol and a clean rag to clean the
mounting plate. Remove all residue of the original
thermal pad. Do not scratch or abrade the surface.
5.
Clean the large flat surface on the back of the re-
placement component with isopropyl alcohol.
6.
The thermal pad, provided with the replacement
part, is a thin metal pad. Remove and discard any
loose protective paper coverings from the pad.
CAUTION
Protective coverings must be removed from the ther-
mal pad. Installing a thermal pad with protective
coverings in place will cause equipment damage or
failure.
6.
Apply the thermal pad to the diode. Use the screw
hole and slot in the mounting plate as a guide to
position the pad.
7.
Install module as follows:
a. Put the replacement module in position, and
secure with the replacement screws. Ensure that
the washers are under the heads of the screws.
b. Torque the screws to 35 inch-pounds (3.95Nm).
CAUTION
Failure to torque properly will cause component
damage.
Art # A-03908
Input Diode
Input Diode
Mounting Plate
Thermal Pad
E14
E16
E8
E6
E18
E13
E5
9.
Reconnect the wiring per the chart.
E5
E1
E13
E2
E18
E3
E6, E8
E11
E6, E8
E11
E14, E16
E12
E14, E16
E12
CutMaster 51 Input Diode Wiring Connections
208/230V
Power Supplies
400V, 460V
Power Supplies
E5, E13, E18
E2
10. Re-connect primary input power, and test the unit
per directions in Section 4.10-G.
11. When all tests are completed, re-install the power
supply cover.
