GentleLASE PRO Flash Lamp 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: Exercise extreme care. Cleanliness of optics is essential. Refer to Service Procedure for Inspection and Cleaning of Optics 8503-00-XXXX.
Appropriate optic handling precautions and techniques must be followed in order for the laser to operate for its maximum lifetime. Clean powder less finger cots or gloves must be worn when handling the flash lamps. The flash lamps are both fragile and expensive. Therefore, it is important to handle them carefully. Some additional suggestions are: keep components inside their containers until they will be installed. Hold them over the bench/table, not over the floor. If you need to put them down, lay them on clean lens tissue over a piece of foam or several pieces of paper towel. Avoid the need to clean the optics other than by gently blowing the dust off of them with filtered, compressed nitrogen or air. Lightly wipe with methanol, acetone, or propanol if necessary. Wipe off any dried film from the lamps with clean, dry lens tissue.
- 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. Discharge voltages on the capacitor before working near the laser head (<25 VDC). Unplug the laser from the wall receptacle.
- Disconnect the four flash lamp wires from the laser head.
- There are two flash lamp o-ring retainer end cap plates for each flash lamp located at each end of the flash lamps. These retainers hold the flash lamps in place. Remove the two screws of each o-ring retainer end cap plate that secure the flash lamps. Pay careful attention to the component order and positioning while disassembling.
- Remove the cover plate on the rear of the chassis frame to allow clearance for the removal of the flash lamps though the access hole in the chassis.
- Remove and discard the o-rings and flash lamps by slowly spinning and pulling the flash lamp to the rear of the laser until clear of the cavity.
- Thoroughly clean the new flash lamps so that they are completely free of fingerprints, dust or alcohol film and clean the flash lamp wires so that when the lamps are installed into the cavity channels, no contamination occurs.
- Install new flash lamps in the proper orientation per drawing 7122-99-9411. Install new o-rings on each end of the flash lamps. Push the o-rings into the o-ring grooves on the cavity. Make sure the flash lamps are “evenly positioned” in the cavity.
- Clean and carefully place the lamp o-ring retainer end cap plates over each end of the flash lamps and “carefully” fasten into place with screws to secure o-rings to lamp.
- Attach the flash lamp wires according to the schematic 9914-80-9015.
- Plug the laser into the wall receptacle.
- Perform the following alignment and calibration verification procedures, and if any additional parts should be replaced, perform all required alignment and calibration procedures. See Service Manual Section Two, under Service Procedures; 8503-01-0921 GL PRO Inspect and Clean Optics • 8503-01-0925 GL PRO Laser Rail Alignment Procedure • 8503-01-0912 GL PRO Calport Calibration Procedure • 8503-01-0918 GL PRO Performance Test Procedure • 8503-01-0920 GL PRO HVPS Calibration Procedure • 8503-01-0923 GL PRO Internal Circuit Calibration Procedure • 8503-01-0915 GL PRO Efficiency and Ramp Test Procedure
- Perform and record Performance and Usage Data Sheet “After” data requirements.
- Enter MM, System Info, and reset the pulse count in “Lamp” for the new flash lamps.
- Install all dust covers, front and side panels, chassis cover plate, and top covers.