ESP MP-600 Specifications download pdf (Page 52)

SECTION 6 Troubleshooting

ESP 400C and 600C Plasma Power Sources

6-14

6.4.1 Power Rectifiers

Power Rectifiers – Procedure to access behind the

front panel

1. Remove top cover and side panels

2. Locate and disconnect plug in rear of ammeter

(white plug with one 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 underneath.

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 bolt on the right.

9. Swing the front panel out to gain access to

power rectifier components.

Troubleshooting Procedures –Negative Plate

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.

Power Rectifiers located

behind the front panel.

Location of fuses F8 and F9

Location of Neg. Plate

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ESP MP-600 Specifications Page 52