GentleLASE PRO Alex Head Replacement Procedure
WARNING – SHOCK HAZARD!!!
The high voltage capacitor in the GentleLASE PRO laser retains LETHAL voltages and must be safely discharged, before working near the laser head or inside the HV section for any reason. This procedure must be performed only by those technicians who are familiar with the precautions required when working with high voltage specific to the GL PRO laser system, and those who have been trained on the GL PRO laser system and its particular hazards.
Residual voltages require stick discharging if access to the head or high voltage sections are necessary. This must be done using the discharge stick located in the HV section. Discharge all 3 capacitor terminals for several seconds each. Verify that the capacitor is discharged below 25 VDC using a DVM and a high voltage probe.
Barium sulfate may cause eye and skin irritation and may cause respitory tract irritation and lung damage!
The GL PRO laser head contains barium sulfate. If the laser head is damaged causing any barium sulfate to leak from the hear cavity all personnel should be aware of the following safety concerns and pay particular attention to the following hazards when working with and handling barium sulfate.
■ EYES: Immediately flush eyes with plenty of water for at least 15 minutes occasionally lifting the upper and lower eyelids. Get medical aid.
■ SKIN: Flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes.
■ HANDLING: Wash thoroughly after handling. Use with adequate ventilation. Minimize dust generation and accumulation. Avoid contact with eyes, skin, and clothing. Avoid breathing dust.
WARNING – LASER LIGHT!!!
During this procedure it is possible that the laser may perform a bleeder pulse, emitting laser radiation. Therefore safety eyewear must be worn at all times during these procedures. The eyewear must have an optical density of ≥ 5.8 at 745 – 765 NM for the Alex Head.
NOTE: If the OPHIR NOVA display is used, be sure the wavelength is set to “YAG, NIR or .8-6”, depending on the meter head being used.
ALEX HEAD REPLACEMENT PROCEDURE:
- Turn laser on, allow for normal warm up. Remove all side panels, front panel, top cover, rail dust covers, and set aside.
- Put on safety eyewear and leave eyewear on while the laser power is on.
- Record all “Before” data on the Performance and Usage Data Sheet.
- Turn the laser “OFF” and measure the HV to verify no voltage is present on the capacitor or laser head flash lamp wires. Unplug the laser from the wall receptacle.
- Drain the DI water using the drain valve located at the bottom of the fluid section.
- Disconnect the two DI water lines connected to the laser head.
- Disconnect the flash lamp wires and HV wires from the laser rail assembly.
- Remove the four screws that secure the laser head to the rail assembly and remove the Alex head.
- Install new Alex laser head assembly. Refer to drawing 7122-99-9412 and schematic 9914-80-9015 for proper head installation and connecting HV and flash lamp wires. Be sure to tighten the screws until the lock washers just start to compress. Do not flatten the lock washers.
- Connect the DI water lines to the laser head.
- Fill the DI water reservoir with clean distilled (de-ionized) water only to within ½ to 1 inch from the top of the reservoir. Turn laser on for 2 minutes and check for leaks and add additional water, if needed.
- Perform the following alignment and calibration verification procedures, if additional parts are replaced, perform all applicable alignment and calibration procedures. See Service Manual Section Two, under Service Procedures; 8503-01-0925 Spectrum Laser Rail Alignment Procedure • 8503-01-0912 Spectrum Calport Calibration Procedure • 8503-01-0918 Spectrum Performance Test Procedure • 8503-01-0923 Spectrum Internal Circuit Calibration Procedure • 8503-01-0915 Spectrum Efficiency and Ramp Test Procedure
- Perform and record Performance and Usage Data Sheet “After” data requirements.
- Install all dust covers, front and side panels, and top covers.