CAL & ADJUST
3-2
VersaPulse Select Service Manual
0621-499-01 03/94
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Storage capacitors inside the system are capable of holding a lethal charge, even after power has
been removed from the unit. A charge level indicator bulb located on the PFN PCB mounted across
the top of the main storage capacitor flashes at a rate proportional to the level of charge on the main
charging capacitor. Do not rely on this indicator to determine that the main charging capacitor has
been discharged. Before contacting the main charging capacitor, disconnect the system from primary
power and use a shorting probe to discharge the capacitor to ground.
Do not touch the YAG Cavity Module when the system is on - IT IS A SHOCK HAZARD. The
YAG Cavity Module is electrically isolated from the chassis and can be at a voltage potential much
higher than ground.
Whenever the footswitch is pressed a single pulse is fired immediately, before the shutter opens,
to dump any charge remaining on the charge capacitor. The laser cavity that fires is the one directly
opposite the one that the servo mirror is pointing towards. The energy is dependent upon how much
charge remains on the capacitor. Since the relay mirror is not directed towards the channel, the beam
will be directed away from the first turning mirror (usually towards the mounting screws for the
plano mirrors on the OC wall.
The Ho:YAG, Er:YAG and Nd:YAG laser light is invisible to the human eye. Because the YAG
laser energy can not be seen, there is no visible indication of the primary or reflected beam. Eye
protection that attenuates the Ho:YAG, Nd:YAG and Er:YAG wavelengths to a safe level must be
worn by all persons in the area of the laser system, whenever the laser is being serviced.
The YAG laser light and its reflections are potential burn hazards and can ignite flammable
materials. Use extreme caution when operating the system with covers opened or removed. The
covers contain the beam and reflections safely within the console. Only those persons required
should be present during servicing, and eye protection that safely attenuates the Ho:YAG, Nd:YAG
and Er:YAG wavelengths must be worn by all present.
The Ho:YAG, Er:YAG and Nd:YAG laser light and its reflections are potential hazards to the eye.
Use extreme caution when operating the system with the covers opened or removed. The covers
contain the beam and reflections safely within the console. Only those persons required should be
present during servicing and eye protection that safely attenuates the Ho:YAG, Er:YAG and Nd:YAG
wavelengths should be worn by all those present.
3.2 SYSTEM CHECK OUT
This system check out confirms that the laser is functioning properly.
1.) Open the front door and defeat the door interlock, then turn the system on and allow it to go through
autocalibration. After autocalibration is completed, place the system in service mode.
If the system fails to pass autocalibration, there is something wrong; continue on to step 2 to gather
more information about why the system failed autocalibration.
12/95
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