Korg, like Yamaha and Roland, treats service manuals as and liability shields . They do not want a hobbyist electrocuting themselves on the 15V DC supply or destroying the main CPU with static discharge.
The manual covers a wide range of topics, including: Korg Pa700 Service Manual
Technical documentation for the Pa700 typically covers the following critical areas for maintenance and repair: Korg, like Yamaha and Roland, treats service manuals
What is your keyboard displaying?
The Pa700 has six delicate flat flexible cables (FFCs). The manual explicitly states: "Do not bend the silver contacts. Use tweezers to lift the ZIF lock." Amateurs rip the cable locks, requiring a full motherboard replacement. like Yamaha and Roland