Service manual

LUMISCAN ACR-2000 SERVICE MANUAL - SECTION 8.0 REPLACEMENT PARTS
8 - 4
3. Loosen the two 7/64” clamp screws recessed in the back side of the tower. Remove the
PMT face first (from the bottom), being careful not to get fingerprints on the blue filter.
4. Remove the blue filter attached to the PMT.
5. Attach the blue filter to the replacement PMT with black photographic tape. Overlap the
top of the filter with about 1/8 inch of tape. Fold the tape edge over the filter to secure the
filter to the PMT. It’s important to get the tape as flat as possible on the filter to avoid light
leaks which will cause vertical artifacts in an image.
6. Insert the PMT into the tower and place the tower face down on a clean surface such as a
table top with a soft cloth. By setting the assembly on a table it is a simple matter to get the
tube flush with the bottom of the tower.
7. Note that the tubes are keyed where they connect with the cable. Position the tubes so that
they fit the cable’s sockets. Facing the machine from the front, the left tube should be
keyed toward “12:00” while the right tube key is at “3:00”. Gently and evenly tighten the
PMT clamps with the two clamp screws. Do not over tighten or damage to the tube may
occur.
8. Perform the PMT Offset Voltage adjust, PMT balancing, High Voltage adjust and blue
LED adjust (Refer to section 5.4 of this manual).
8.3.2 LASER DIODE MODULE
LASER DIODE DRIVER ASSEMBLY REMOVAL AND REPLACEMENT
WARNING
USE PROPER ESD PRACTICE WHEN TOUCHING LASER OR SCANNER
EXTREME CAUTION
1. The laser assembly produces 18 to 25 mW of power. Care must be taken to avoid
looking directly at the beam.
2. The Laser Diode output is transmitted to the lens through a fiber optic cable. The end of
this cable has a protective cap that is removed when the cable is screwed into the lens
assembly. Great care must be taken so that the end of the cable does not come into contact
with anything, i.e., fingers, metal, etc., or damage will occur.