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section 6
6.4.1 power rectifiers
Power Rectifiers – Procedure to access behind the front panel
Power Rectifiers located behind the
front panel.
troubleshooting procedures –negative plate
Location of Neg. Plate
Location of fuses F8 and F9
1.
Remove top cover and side panels
2.
Locate and disconnect plug in rear of ammeter (at-
tached tone red and one black wire)
3.
Remove pilot arc switch
4.
Disconnect voltmeter
5.
Disconnect orange and yellow wires from relay K4.
6.
Remove two bolts holding the left side of the front
panel to the base.
7.
Remove three bolts holding across the center base
of the front panel. These are accessed from under-
neath.
8.
Remove one of the bolts holding the right side of the
front panel to the base. Loosen the second bolt. Of
these two bolts, remove the bolt on the left and loosen
the bold on the right.
9.
Swing the front panel out to gain access to power
rectifier components.
1. Visually inspect fuses F8 and F9. Replace if they show signs
of being blown or melted. Inspect diodes. If ruptured
or burned, replace all diodes on the NEG Plate. If diodes
appear to be OK, proceed to next step.
47
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