http://www.ps3hax.net/2010/11/ps-downgrade-file-leak/ 档案释出。 How to Install/ Use PS Updater Installation Step 1 – Download PS Updater Step 2 – Click start button and type in the search bar UAC and click on User Account Control Settings listed above. Inside this menu please lower the settings to lowest priority, Save and restart the computer. Step 3 – Unrar/Unzip and click on setup.exe Step 4 – follow the steps by clicking next until you reach the point of setup where it asks you to plug in your device Step 5 – plus in PS Jailbreak device and click next Step 6 – choose Unknown Device #1 from the list and click next Step 7 – click save to save the .ini file under the place it wants Step 8 – Click install driver and now complete installation （安装辨认PSJB bootloader的驱动程式，每家有不同的安装方式PSGrooPIC 是用 Windows 系统内建的） Use Step 1 – Open PS Updater application that install a shortcut on your desktop Step 2 – Plug in PS Jailbreak and click My Serial (make sure it can recognize and find your serial number) Step 3 – Click My coupons and enter the coupon code you received from your authorized reseller when purchasing PS Downgrader. Step 4 – Save the download it prompts you with (You will receive 2 files, a) Program (which is PS Jailbreak) and b) Downgrade (which is your downgrader) Step 5 – Go install file choose the Downgrader file and click Update now Step 6 – After using PS Downgrade to lower your firmware please follow the above steps this time choosing to update file a) Program Step 7 – Now your PS Jailbreak is back to a Modchip （其实就是更新JB工具的韧体而已，每家有不同的更新方式，PSGrooPIC 也有 自己的更新程式） Downgrader requirement – PS Jailbreak USB Dongle, PS Downgrade Coupon that has been installed onto your PS Jailbreak Device, Modified 3.41 PUP, LV2Diag.self (file 1) and LV2Diag.self (file 2) （竟然有修改韧体内容？那一定必须要绕过签证查验） Step 1 – Insert PS Jailbreak device that has been reprogrammed as PS Downgrade into your console Step 2 – Turn on console using same boot method as PS Jailbreak – Press Power then immediately press eject. You will see your console turn with PS Jailbreak lit up with red/green light followed by green only, Then it will turn off. Step 3 – Turn on console to make sure you are in factory service mode. （看来真有办法进入Factory/Service Mode，按照xorloser的说法， PSJB大概偷到了主机的Master Key了） You will see a huge red box on the screen saying Factory Service Mode, once confirmed please turn off console and remove PS Downgrade Dongle Step 4 – Program any blank usb with 2 files , A) modified 3.41 pup B) Lv2Diag.self (file 1) These must be the only files on the usb key and must be placed in the main directory of the flash drive. Step 5 – Insert this new Flash drive into the right USB PORT of your console (It must be placed in the outermost right port) and turn the console on. You will see black screen but you will see flashing lights on the console (yellow) and on your USB key （要放在第一个 USB埠） Step 6 – Wait 3 minutes for the system to install the old FW, towards the end the power button on the console will start flashing green and then your console will power off. （非常正常的韧体更新流程） Step 7 – Remove the usb key and turn on the console , you will still be in factory service mode. Please verify you have downgraded successfully to version 3.41 Step 8 (Optional) – If you wish to downgrade to any older firmware you can not follow step 4,5,6 using any regular firmware PUP. (You do not need to use modified custom firmware now that you are on 3.41) Step 9 – Insert flash drive back into PC , remove the PUP and Lv2Diag.self and install only LV2Diag.self (file 2) on the USB Flash Drive （多此一举） Step 10 – Power on your console, after 10 seconds it will power off Step 11 – Turn on your console with no USB inserted and you will be out of factory service mode into retail mode with your chosen firmware version installed. JAilbreak your console and enjoy playing homebrew ****** 所有更新韧体的流程都合逻辑，所以应该是可行的。 我的推测是这样：Factory/Service Mode可以在不查验韧体签证的情况下更新韧 体，但是只能够升级不能降级。於是还需要LV2Diag.self这个档案来绕过查验版 本，或是说欺骗主机要更新的韧体版本比原有的要新（这个在华硕的无线AP也有 类似的玩法），然後主机就执行更新了。 所以PSJB才会说要降到任何版本的话，都要有修改过的韧体，修改过的地方非常 有可能是韧体的版本编号，欺骗主机然後明升暗降（←这个成语可以这样用吗？ ）。 -- ○ ____ _ _ _ _ ____ _ _ ____ _____ ____ 。 ★(_ _)( \( )( \/ )( ___)( \( )(_ _)( _ )( _ \ ｏ _)(_ ) ( \ / )__) ) ( )( )(_)( ) / ● ‧ (____)(_)\_) \/ (____)(_)\_) (__) (_____)(_)\_) ★ ｏ --

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