Accuprint AP30CL - 6000 Service Manual page 111

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94MS41 Rev. C1 S/W Ver 2.06
‡ The voltage readings described in the following are typical of 5kW light
sources see voltage chart to find high and low values for others.
10) If a reading remains high (500V~ or more see note ‡) and it should be
low (less than 300V~ see note ‡), the capacitor is not being pulled into
the circuit. Check the respective relay, resistor, and wiring for an open.
11) If a reading remains low (less than 300V~ see note ‡) and it should be
high (500V~ or more see note ‡), the capacitor is locked into the circuit.
Check the respective relay, wiring, and PC board for a short.
12) If the readings show voltage changes from high to low and from low to
high, but the overall low reading does not increase from the previous
power level, then the capacitor being pulled into the circuit has failed.
13) Check the blowers using a piece of paper held up to the intakes at each of
the lamphead during a cool-down cycle. The paper should get held up to
each intake, if it doesn't, the blower is bad.
Blowers speed can not be checked until this point because all previous
checks affect the operation and can make them appear to be operating
incorrectly. Also check blower voltage at terminals 4 & 5 for most lights
this voltage should be a MINIMUM of 45V~ some lights this voltage
will be higher depending on lamp used and lamp condition.
14) Check for cooling obstructions on intakes and exhausts. If any are found,
remove them.
15) Check lamp idle voltage at terminals 2 & 3. This voltage should match
the voltage chart above, if not, YOU MUST install a new lamp and
recheck (see Idle Setting if adjustment is necessary).
C DO NOT ADJUST idle voltage with a used lamp.
Lamp voltage can be effected by all the checks in the check list to this
point. So if this check list is used properly (followed step by step) if at
this point the lamp voltage is out of specification it can now be adjusted
if the lamp is less than two weeks old AND "not or" has no sign of
deformation otherwise a new lamp must be installed before adjusting.
Adjusting lamp idle voltage without first checking other causes of the
lamp voltage deviation can damage the equipment.
16) If used, check the power supply safety interlock jack next to the power
supply power on/off switch. A failure in this circuit will not allow the
unit to do an exposure, the only time the shutter will rotate if this circuit
is open, is when the power is turned on or off.
If you suspect this circuit is faulty, turn the manual expose switch on,
then short the blue and white wires on the jack together with a screwdriver
(make sure you do not short to ground) and see if the shutter opens, if it
opens the circuit is at fault.
17) Check for smooth shutter rotation. If the shutter rotates smoothly, skip
to step 20, otherwise continue.
18) If the shutter does not rotate smoothly, it may not stop in the correct
position and the bearings must be greased.
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