Laser Light Replacement

Prerequisites

Table 1. Personnel requirements
Required persons	Preliminary requirements	Procedure	Finalization
1	minutes	minutes	minutes

Table 2. Safety

Warning

laser radiation

Viewing the laser output with certain optical instruments (for example, eye loupes, magnifiers and microscopes) may pose an eye hazard

Do Not stare into the beam or view directly with optical instruments.

Overview

Procedures for replacing alignment lights, and alignment of the laser lights. There is one (1) laser light in the top middle assembly.

Perform Lock Out / Tag Out Process (refer to Lockout / Tagout for System Cabinet PDU Main Breaker.).
Remove the center control panel to allow access to power supply connector. Refer to Magnet Enclosure Control Panels.
Pry cover off of defective laser assembly with a screwdriver. See Figure 1.
Remove two screws, and let laser light assembly hang free. See Figure 1.
Remove screw clamping laser in place. See Figure 1.
Using a needle nose pliers, pull retaining clip off laser/housing assembly. See Figure 1.
Slide laser light out of housing. See Figure 1.

Figure 1. LASER ALIGNMENT LIGHT ASSEMBLY
Follow laser light leads to the power supply connector and pull connector off.

Plug new laser light into power supply board.
Slide housing onto laser and install retaining clip. See Figure 1.
Install clamp and slotted screw onto cover plate. See Figure 1.
Install cover plate to magnet front end bell using two furnished screws. See Figure 1.
Reinstall the center control panel.
Refer to the corresponding Lockout/Tagout power restoration process.
Turn on laser alignment lights and check alignment of replaced laser. Refer to Laser Light Alignment for procedure on how to properly align the laser lights.

Perform any scan to obtain the coronal image. Check that the phantom image is at the center of display.
Perform DQA II Tool to adjust Iso-Center Z.
Perform Signal to Noise - Head Scan.