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TM-353 Page 38 Syncrowave 250
7-3. Fuses F1 And F2
1 Fuse 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.
2 Fuse 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:
1
2
3/8 in
7-4. Adjusting Spark Gaps
Ref. ST-154 795-C / Ref. S-0043
Tools Needed:
1
4
3
4
3
2
Y Turn 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.