Yamaha disklavier DS4M4 PRO Manual de mantenimiento - Página 5
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3. MKIV/Pro Features and New Functions
Enhancements made to the Disklavier operational and piano system, plus new technologies and
functions are described below.
1) Gray-scale sensor system on hammer and key mechanisms provides continuous monitor-
ing
A gray-scale sensor system installed on both the hammer and key mechanisms allow accurate
monitoring of the movement of each hammer and key over the key's full stroke. As this advanced
system offers greater accuracy in detecting the speed and timing of the key's down-stroke and re-
lease, it makes possible very fine continuous playback at a pianissimo level, which would be difficult
under normal playing conditions. All recorded data by the Pro model is saved in XP Mode.
2) Improvements to the keyboard drive and pedal servo system
Precision control of the key position, including speed and timing of both the downstroke and release,
is made possible by using feedback from the servo control's MM sensors in the key drive unit and key
position data from the key sensors. This system offers greater playback accuracy, especially when
playing repetitive mid-depth keystrokes. Servo calibration utilized on the pedal provides exceptional
accuracy in detecting the pedal's halfway point.
3) Wi-fi (Wireless LAN) Pocket Controller
Two-way, Wi-fi (wireless LAN) allows for background music control from locations even outside of the
room (operation may vary due to wall design). The system also incorporates a 3.5-inch color LCD
touch screen for convenient user control. Its interface lets you jump playback to the middle of the
song by simply tapping the slide bar on the screen. Also convenient is the slide out keypad which
makes entering characters for song names, etc., an easy operation.
* 10.4-inch Tablet Controller enables further comfortable operation - North American market only.
4) CD-ROM drive, hard disk, and terminal for external connections
Like the Mark III Disklavier, the unit is equipped with both a floppy disk drive and a CD drive that
allows playback of audio CDs or MIDI data recorded on a CD-ROM. Also included is a large capacity
80GB hard disk drive that lets you download and save data.
(Note: Data cannot be written directly to the floppy disk while recording.)
* Audio CD playback requires the use of a pair of headphones or external speakers.
In addition, the Media Center unit is equipped with a standard USB interface, and a video sync func-
tion that utilizes the I/O center sync connector to allow synchronized playback of video and perfor-
mance data.
5) The Post-Delivery Checking diagnostic function-Improved maintenance
Functions used in servicing the programs are grouped into the Service Center program which in-
cludes two modes; the Post-delivery Checking Mode, which is used to check the cable connections
and circuits in the device after installation; and the Maintenance Mode (formerly known as the Mainte-
nance and Test Modes). Service LEDs included on each of the circuit boards let service personnel
confirm electric current and operation by sight, eliminating the need for testers when checking the
main components. This system is known as the Diagnostic System (self-diagnosing) and is the first
such system to be incorporated on a musical instrument. Accessed through the remote controller, an
overall system check function analyzes system communications-how the components in the system
are communicating with each other-and provides the results on the controller's 3.5-inch screen. Also
provided are test results for pedal and keyboard calibration that are required for maintenance.
MHB23 MKIV/PRO DIOV1.05, SCV.1.01 PAGE.03