Android 5.0.2 factory image and OTA update now available for OG Nexus 7
In addition, the Android 5.0.2 update is being sent out OTA to the OG Nexus 7. The build number of the update is LRX22G and the update will fix an issue that the tablet has with storage, and another issue that deals with the alarm on the slate. The 2012 version of the Nexus 7 never received Android 5.0.1, and instead is going straight to the new build. That could indicate that this will be a device-specific update intended to fix those issues that ailed the OG Nexus 7.
The Factory Image is used by those who are in the midst of customizing their device and have lost their way. By flashing the Factory Image on the Nexus 7, for example, the tablet will be loaded up with Android 5.0.2 instead of becoming a useless brick. Another use for the Factory Image would be for those who have rooted their Android device and will miss the opportunity to receive an OTA update. By flashing the Factory Image on their phone or tablet, the device owner can receive the update.
If you own the Asus built Nexus 7 and need to flash the latest Factory Image, simply click on the sourcelink.
source: GoogleDevelopers via AndroidPolice, GSMArena