How to add toner to Canon lbp2900?

The first step of drying drum with toner is how to unload the two pin pins. Canon lbp2900 and Canon lbp1120 unload pin are different because the structure of the drying drum is different. In fact, you can unload them in the same way, I tried to use the sharp mouth clamp or the online clip clamp to hold the nail and pull it out. I didn't find such a sharp clip and couldn't operate it. This method failed. One thing I want to add is very important: many people use external forces to unload the dingtalk, so that the dingtalk can be easily damaged, you can barely use it at a time, and the skeleton for the first time you play the drum may be loose. If you can't support it, you can finish it. Especially for the lbp2900 model, Canon lbp1120 is barely able to use brute force.
I have also checked most of the information on the Internet, but there is no such updated on-site operation demonstration case. Only the information of the old model is available, and you do not have the right to browse it, other people will not teach you how to add toner?" The dazzling words attract you, and the phone number like door-to-door repair is used to contact ghost Dongdong such as toner. Forget it. I will study it myself. I read some maintenance books about printers and the working principle of printers. By observing the structure of the drying drum, yeah! DIY, do it yourself, and feel the most fulfilled! Now I am a professional toner player.
The detailed information is as follows!Tool: zicai, 10-20 cm thin wire, alcohol cotton balls, paper towels, screwdrivers, Paper jams
Image: key structure of Canon lbp2900-a key part of Pin unloading 

Supplement: If necessary, I will add the on-site demonstration images. No photos are available for the moment!