HP 4300 Service Manual - Page 208

Hint CAUTION Power supply 1. Remove the following assemblies: q Rear output bin. See "Rear output bin" on page 155. q Rear accessory cover and tray 2 extension door. See "Accessory covers and the tray 2 extension door" on page 143. q Top, right-side, and left-side covers. See "Top cover" on page 146 through"Left-side cover" on page 151. q Fuser. See "Fuser" on page 162. q Formatter assembly. See "Formatter assembly" on page 161. 2. Unplug the two power-supply ribbon cables and the DC controller power connector from the DC controller (locations J80, J81, and J99; callout 1). Unweave the wire-harness and cables from the wire guide (callout 2). Remove four screws (3 machine and 1 ground screw; callout 3). It might be necessary to remove additional wire-harnesses from the wire guide to gain access to the power-supply harness. Also note the position of the ribbon cables and power cables through the bottom of the wire guide (callout 2). Failure to route these cables properly through the bottom of the wire guide might result in interference with the tray 2 lifter-driver assembly and the cable might be damaged during printer operation. 1 2 4 3 Figure 139. WARNING! Power supply (right side; 1 of 5) When installing the power supply, you must use a ground screw (callout 4) to secure the AC outlet (callout 4) to the printer chassis. 188 Removing and replacing parts Q2431-90912