HP 4550 Service Manual - Page 186
Paper feed PCB replacement tip, Paper feed PCB removal and replacement 3 of 3
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7 Remove the screw in the black plastic cover shown in callout 3, Figure 6-44. 8 Remove the black plastic cover. 9 Remove the eight cables from their connectors on the paper feed PCB shown in Figure 6-46. 10 Remove the screw from the rear of the paper feed PCB (callout 4, Figure 6-46). 11 Carefully remove the paper feed PCB by sliding the board backwards, then tilt the top of the board forward to clear the top of the board from the metal tab along the top of the PCB. Paper feed PCB replacement tip Carefully insert the paper feed PCB into the chassis, ensuring that the two paper feed PCB metal tabs sit in the open tab holders in the chassis. 4 Figure 6-46 Paper feed PCB removal and replacement (3 of 3) 184 Removal and replacement C7085-90921