HP Color LaserJet CM4730 Service Manual - Page 378

13. Reinstall the cartridge guides, beginning with the lower cartridge guide. The upper cartridge guide (callout 18) has two projections (callout 19) while the lower cartridge guide (callout 20) has only one projection (callout 21). CAUTION: Be careful reassembling the upper and lower cartridge guides. They are similar to each other; if reassembled incorrectly, the ETB will not position correctly. The cartridge upper guide unit (callout 18) has two projections (callout 19). The cartridge lower guide unit (callout 20) has one projection (callout 21). Figure 5-146 Reinstall the main drive assembly (14 of 16) NOTE: There are 6 points of alignment on these guides. Four tabs - two front and two rear - which hook into the chassis sheet metal, and two horizontal keyholes which key onto the shafts of the two larger gears they cover. To align: using one hand, try inserting the rear tabs of the cartridge guide into the sheet metal, then the front tabs, and when the gear shafts poke through both horizontal keyholes, slide the cartridge guide back towards the rear of the printer. You should hear a couple of "snaps" as the two retaining tabs click into position on the chassis, and you should see the gear shafts properly keyed through the horizontal keyholes on the cartridge guide. 358 Chapter 5 Removal and replacement Figure 5-147 Reinstall the main drive assembly (15 of 16) ENWW