HP 4550 Service Manual - Page 181
Carousel drive assembly, To remove the carousel drive assembly
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Note Carousel drive assembly To remove the carousel drive assembly Turn the printer off, wait five seconds, and then unplug the printer. 1 Remove the formatter pan assembly. 2 Remove the rear door. 3 Remove the large fan housing and the fan. 4 Remove the toner level sensing assembly from the HP Color LaserJet 4550 (see Figure 6-39). Figure 6-39 Toner level sensor assembly removal and replacement 5 Free the cables from the rear cable trough located beneath the large fan housing shown in callout 1. 6 Disconnect the two motor cables from their connectors (J203 and J205) located on the developing PCB and remove them from their trough. 7 Disconnect the sensor as shown in callout 2. 8 Disconnect the two high-voltage (red) cables from the HVPS and free the front cable from the cable stays. 9 Push up and out on the cable trough shown in callout 3 to release the lower tabs. Then tilt the bottom of the cable trough out slightly to gain access to the top screws on the carousel drive assembly. Note To remove the cable trough, you might need to first loosen the screw on top of the developing PCB housing. C7085-90921 Chapter 6 Removal and replacement 179