Just had an accessory tray in the shop. Acted like a sticking solenoid. Pickup assembly kept rotating. Started tearing it apart like the 42xx accessory tray. Side cover, tray number assembly all came off as normal. Then, I got to that side metal "cage" that runs the length of the drawer. Eventually found that two of the screws have moved inside, behind plastic parts. Only plastic part I was able to figure out how to remove was the rear. Couldn't figure out how the front plastic came off. I just bent the "cage" down and out of the way. Removed the pickup solenoid screw and the screw below that and the one on top just like on the 42xx. After that, I pulled and wiggled. It would not come off. I eventually saw why. HP, in their infinite wisdom have now riveted two of the pickup assembly gears to the chassis so it cannot be removed. 
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Hopefully I save the next person the trouble.

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Hopefully I save the next person the trouble.
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