Service manual

LUMISCAN ACR-2000 SERVICE MANUAL - SECTION 8.0 REPLACEMENT PARTS
8 - 5
3. Special attention must be given to adding jumpers on JP2 and JP3 on the Laser Diode
Driver board when removing the laser assembly, and removing these jumpers after the
replacement assembly is installed. If these steps are not followed carefully, damage can
occur to the laser diode.
REMOVING LASER DIODE MODULE
1. Turn off the system and remove the main enclosure.
2. Remove the Galvo PCA/bracket assembly from the bulkhead leaving the galvo motor
connected. Set the PCA/bracket assembly inside the reader away from the laser assembly.
2a. The bracket is secured to the bulkhead by two phillips head screws and on
5/16” hex head nut.
3. Install jumpers across JP2 and JP3 on the Laser Diode Driver PCA. Those jumpers are
shipped from the factory hanging off one of the pins of each jumper.
4. Disconnect the interlock cable from the interlock switch.
5. Disconnect the DC power cable going to J1 on the Laser Diode Driver PCA.
6. Observe the ferrule securing the tip of the fiber optic cable to the F/C mount in the lens
barrel. With your fingers, gently unscrew the ferrule then very gently slide the cable the
lens assembly. Be extremely careful not to contaminate or damage the tip of the cable.
Immediately place the protective cap over the end.
7. Remove the four 7/64” hex screws securing the Laser Diode Driver Assembly to the
bulkhead.
8. Remove the Assembly and place in the protective anti-static package the replacement
arrived in. Return the assembly to Lumisys.
REPLACING LASER DIODE MODULE
1. Mount the Laser Diode Assembly to the bulkhead using the four screws.
2. Remove the protective cap from the end of the fiber optic cable. Be extremely careful to
not touch the exposed end of the cable with anything or damage will occur. Note the key at
the cable end and place properly to the lens assembly. Secure by turning the locking ferrule
finger-tight.
3. Connect the power cable to J1 of the Laser Diode Driver PCA and remove the protective
jumpers from JP2 and JP3. Place the jumpers on one pin of JP2 and JP3 in case the
assembly has to be removed in the future.