Apply the Main Power
and Turn the Unit ON
START
Is
Interlock
at J 301
In?
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Open
Circuit
Voltage
Present?
Is
Power
ON?
Check Calibration
Check AC line,
line cord,
CB 201, S 301
Insert or Repair Interlock
Press the preadjust switch.
Replace the module if there
is no adjustment, and the
meter board is OK.
Shut down, connect the
resisitive load, and turn
the unit on.
Measure 5V at J102,pin 1.
Replace module if not present.
Measure 0-5V range at J102,
pin 2. Replace module
if not present.
Does the
output adjust
from min to
max current?
Does
the Meter
display YES?
Press start switch
Is 100V
p-p present
at pins 1 & 2
of J305?
NO
Troubleshoot and repair the
ignitor drive circuit board
(68810-3-1600)
68805-M
ARC LAMP POWER SUPPLY
16
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