7. Using the ohmmeter check for continuity (zero
ohms) from plug J31 pin 3 (lead#503A) to plug
J4 pin 6 (lead#210). See Figure F.22,
Simplified Trigger Circuit Diagram.
8. If any of the resistance checks are abnormal-
ly high in steps 5, 6 or 7, check for broken or
loose wires, connections or "open" ther-
mostats. Also check the small inductors on
the Remote Protection Board. See Figure
F.22, Simplified Trigger Circuit Diagram.
ELECTRIC SHOCK can kill.
• With input power ON,
there are high voltages
inside the machine. Do
not reach into the machine
or touch any internal part.
9. Apply the correct input power to the machine
and turn ON.
10. Locate plug J6 on the power PC board. See
Figure F. 15. in the Power Board Test.
11. Carefully check for approximately 1VDC from
plug J6 pin 2 (lead #305)(+) to plug J6 pin 7
(lead #301) (-). If the approximately 1VDC is
present the power PC board and protection
PC board are functioning properly for the trig-
ger circuit to operate. If the correct DC volt-
age is NOT present, perform the Protection
Board Test and the Power Board Test.
12. Test to make sure the T1 auxiliary trans-
former is producing 24VAC. See Figure F.22,
Simplified Trigger Circuit Diagram.
13. If the above tests do not reveal the problem,
the control PC board or associated wiring
may be faulty. See Figure F.22, Simplified
Trigger Circuit Diagram.
WARNING
