Miller Electric TM-353E manual Fuses F1 And F2, Adjusting Spark Gaps

7-3. Fuses F1 And F2

1

2

1Fuse F1 (See Parts List For Rating)

Fuse F1 (between leads 50 and

150)protects wiring harness from shorted SR2. If F1 opens, you may experience problems with arc start- ing and arc performance in the DC TIG mode.

2Fuse F2 (See Parts List For Rating)

Fuse F2 (between leads 22 and

149)protects wiring harness from shorted SR3. If F2 opens, you may experience problems with arc con- trol, and no high frequency in start high frequency.

Tools Needed:

3/8 in

7-4. Adjusting Spark Gaps

4 4

3

3

2 1

Tools Needed:

YTurn Off power before adjusting spark gaps.

Open access door.

1 Tungsten End Of Point

Replace point if tungsten end dis- appears; do not clean or dress tungsten.

2 Spark Gap

Normal spark gap is 0.008 in (0.203 mm).

If adjustment is needed, proceed as follows:

3 Adjustment Screws

Loosen screws. Place gauge of proper thickness in spark gap.

4 Pressure Point

Apply slight pressure at point until gauge is held firmly in gap. Tighten screws to 12 in/lbs torque (overtigh- tening will deform plastic base). Ad- just other gap.

Close access door.

Ref. ST-154 795-C / Ref. S-0043

TM-353 Page 38 Syncrowave 250