C8523-90921 Motors and fans 151 4 Remove two screws (callout 4) and remove the upper rail (call 4 5 out 5). 4 5 Figure 136. Power supply assembly (3 of 6) 5 Unlock the connector guide claw (callout 6). 6 Figure 137. Power supply assembly (4 of 6) Power supply assembly (3 of 6) 5 Unlock the connector guide claw (callout 6).