Figure 6-22. Induction coil and high fregueny transformer, removal and installation.

b. Cleaning and Inspection.

d. Reassembly. Refer to figure 6-20 and reas-

(1) Clean all metallic parts with an approved

semble the foot switch and output control assem-

cleaning solvent. Clean the switch with a clean,

bly.

dry cloth.

(2) Inspect for breaks, cracks, corrosion,

6-23. Foot Switch and Cable Assembly, Model

burned or pitted contacts, or other damage.

DAR-300HFSG

(3) Replace defective parts as necessary.

a. Disassembly. Refer to figure 6-21 and disas-

C. Reassembly. Refer to figure 621 and reas-

semble the foot switch and cable assembly.

Section VI. HIGH FREQUENCY INDUCTION COIL, HIGH FREQUENCY

TRANSFORMER, CONTROL TRANSFORMER, AND MAIN TRANSFORMER ASSEMBLY

6-24. General

The main transformer assembly provides low volt-

age welding current. Refer to paragraph 23 for

The high frequency induction coil superimposes

high frequency grounding instructions.

the high frequency voltage generated by the spark

gap assembly onto the output arc voltage. - T h e

6-25. Induction Coil

high frequency transformer provides a voltage for

high frequency generation by the spark gap as-

a. Removal.

sembly. The control transformer provides 115 and

(1) Remove the side shrouds (para 3-13).

24 volts ac for operation of the control circuits.