Lincoln Electric IDEALARC DC-655 Service Manual page 67

F-25
MAIN TRANSFORMER (T1) VOLTAGE TEST (continued)
10. Test for 115 VAC between leads #31 and
#32 on the terminal strip. The terminal strip
can be accessed by removing the small
panel at the lower portion of the case front.
See Figure F.8. 115 VAC AC should also be
present at the 115 VAC receptacle. If the
correct voltage is not present, make sure
the 20 amp circuit breaker is not tripped or
faulty. Also check the wiring between the
main transformer, the terminal strip, the cir-
cuit breaker and the receptacle. See the
Wiring Diagram.
11. If 115 VAC is NOT present and the wiring
and circuit breaker are good, the main
transformer may be defective.
TROUBLESHOOTING & REPAIR
FIGURE F.8 - TERMINAL STRIP
POSITIVE
OUTPUT
TERMINAL STRIP
TERMINAL
COVER PANEL
+21 -21 41 4 2
TERMINAL STRIP
IDEALARC DC-655
14 PIN MS RECEPTACLE
LOW INDUCTANCE
NEGATIVE OUTPUT
TERMINAL
31 32 75 76 77
12. Test for 42 VAC between leads #41 and #2
on the terminal strip. The terminal strip can
be accessed by removing the small panel
at the lower portion of the case front. See
Figure F.8. If the correct voltage is not pre-
sent, make sure the 10 amp circuit breaker
is not tripped or faulty.
wiring between the main transformer, the
terminal strip, and the circuit breaker. See
the Wiring Diagram.
13. Remove the AC input power to the DC-
655. Remove the screws from the control
box cover and carefully lower the cover.
14. Locate the firing board on the left side of
the control box.
F-25
HIGH INDUCTANCE
NEGATIVE OUTPUT
TERMINAL
Also check the