SIGMA AM-255 - Manual (Page 19)

6. TROUBLESHOOTING page 16
Model AM-255
6. TROUBLESHOOTING
This guide is designed so that on-site personnel can service the AM-255 and effect necessary
minor repairs. It covers procedures and parts down to the board level. Any other problems
should be referred to factory authorized service personnel. Unauthorized repair voids warranty.
When repairs are completed and the unit returned to operation, a copy of the Performance
Verification Checklist (section 5.2.) should be filled out and filed for future reference.
6.1. COMPONENT ACCESS
6.1.1. AM-255 Controller Board:
The AM-255 Controller board is mounted on standoffs inside the lid of the enclosure. To access
it, open the front panel by removing the two screws holding it in place. Unplug the twelve pin
Molex connector, and disconnect the wires to the terminal stripes. Remove the four phillips
screws holding the AM-255 board, and lift the board out. To reinstall, replace the board on the
standoffs using the four phillips screws, reconnect the wires, and Molex connector. Close the
front panel and replace the two screws.
6.1.2. Battery:
There is a metal bracket that retains the battery and charger. Remove the two screws from the
bracket and remove it. The battery charger is mounted to the Battery with two velcro strips.
Detach the battery charger from the battery by pulling it to unhook the velcro. Unplug the wires
going to the battery and pull it off the velcro strips that hold it to the enclosure.