System Construction - Yamaha disklavier IV / Pro Series Maintenance Handbook

4. System construction

I/O center / (DIO100)
LINUX OS PC system with 80GB hard disk. Tone generator and audio processor cards are inside.
The I/O center connects to the PRC100/TRC100 using wireless LAN card (WD05740).
Media center / (DMC100)
The Media Center has both CD and FDD drives. It is connected to the I/O center with a D-sub cable
similar to the cable that connected the Mark III control unit to the piano. The USB interface provides the
user with an additional data source. The Media Center has 2 headphone inputs which will turn Quiet
Mode on automatically when a jack is inserted. The Media Center also has a mic input.
Pocket controller (PRC100)
Wireless LAN remoted controller with 3.5 inch display and key pad. (LAN card WD05740)
Tablet controller (TRC100 - North American market only)
Wireless LAN remoted controller with 10.4 inch touch panel display.
Power supply unit (PS unit)
Universal switching power supply (100-240V) with cradle and speaker outlets.
Central signal processor unit (CSP unit)
The control center of the piano system. Calibration data and piano type data is stored.
Gray scale key/hammer sensor unit (KS/HS)
Optical transmitted gray scale sensor enables full trace of key and hammer moving.
Key drive unit (KD unit)
MM (Moving magnet) servo system drive. Shorter solenoid but more powerful playback.
Pedal drive unit (PD unit)
Pulse modulation sensing servo drive system. Servo calibration has eliminated half point adjustment.
Motor drive unit (MD unit)
Quiet (silent) motor drive. Small chip is inside and tells its condition to CSP board.
MHB23 MKIV/PRO DIOV1.05, SCV.1.01 PAGE.04