To avoid the possibility of personal injury, remove the power supply from operation before opening the cabinet. Turn off ac power and disconnect the line cord, load, and remote sense leads before attempting any repair or replacement.
When replacing any
Do not use any heatsink compound containing silicone, which can migrate and foul electrical contacts elsewhere in the system. An organic zinc oxide cream, such as American Oil and Supply Company Heatsink Compound #100, is recommended.
Most of thc attaching hardware in this unit is metric. The only
a.
b.
c.
d.
e.Screws that secure side chassis to
f.Screws that secure
Top Outside Cover Removal. Remove three screws, the rear handle screw (Phillips, 10x32) and two
Bottom Cover Removal. Remove only for repair of main board. Remove two
Inside Top Cover Removal. The unit includes an inside cover which secures the vertical board assemblies. Remove the inside cover for repair but not for calibration. Remove the six mounting screws (Pozidriv, M4x.7) – three on each side and five board fastening screws (Pozidriv, M4x.7) all on top. Remove the inside cover by lifting at the front edge.
When installing the inside cover, insert it first at the right side. While holding it tilted up at the left, reach through the cutouts in the cover and fit the top tabs of the A2 control board into the mating slots in the cover. With the top cover in place reach through the cutout above the A4 power mesh board, align the
A2 Control Board Removal
After removing the inside cover, remove the A2 board by lifting first at the front edge and than pulling it up and out of the unit. Two connectors hold the A2 board at its bottom edge.
When installing the A2 board, insert it first at the rear of the unit. While holding it tilted up at the front, fit the A2TB1 terminal strip into the mating cutout in the rear panel. Then lower the A2 board's bottom connectors into the mating connectors on the main board. Press the A2 board into the connectors.
26
