Accuprint AP42CL 8000 Service Manual page 119

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94MS42 Rev. B1 S/W Ver 2.06
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 65V~ to 75V~ 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.
19) If the shutter fails to rotate at any time, then check the following:
20) When the shutter is supposed to be moving. Check for 120V~ between
terminals 4 & 6. If there is voltage, go to the lamphead and check for
voltage at the shutter motor then skip to step 22.
21) If there is no voltage between terminals 4 & 6, check the PC board output
for voltage at pins 2 & 4 (see PC Board Layout for pin location).
22) Check to make sure the shutter stops immediately in the correct position.
23) If the shutter stops immediately, but in the wrong position, check the
shutter position switch.
24) If the shutter coasts to a stop in the wrong position, check the shutter
brake.
25) If you run into a situation were you are not getting voltage at the terminal
strip, relay, blower, etc. make sure you go to the PC board itself and
Double check the PC board outputs before replacing it.
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