Removing / Re-Installing Hammer Sensor - Yamaha disklavier IV / Pro Series Maintenance Handbook

6. Regular field servicing

6 - 2. Removing / re-installing hammer sensor

Removing hammer sensor
Remove the 2 mini DIN connectors. ( for Hammer and key sensor )
Loosen and remove the hexagonal screws and hold up the sensor straight up slowly to avoid gray-scale
shutter damage.
Re-installing hammer sensor
1, Put up the sensor above the action with a slant.
2, Check the both sensor attaching bolt in the middle and shutter checking hole together.
3, Put on the sensor solowly to the flat position.
4, Execute the sensor caliblation,
( It takes around 3 minutes to complete.)
Note: No height adjustment is necessary but needs always caliblation to get correct height information.
always after removing, by using PRC100 controller.
MHB23 MKIV/PRO DIOV1.05, SCV.1.01 PAGE.20
You can work this adjustment
under Stand-by mode.