RS-232C Buffer Unit
The RS-232C buffer unit receives input from the 15-pin D-SUB connector
placed on the rear panel. The unit consists of an input command data buffer
and an output status data buffer.
Character Generator
This unit generates character signals to be superimposed on the video signals
displayed by the player. Character data is sent from command processors to
the character generator.
2) Player control block
The player control block analyzes player control commands received from the
command processor of the communication control block and executes them to control
the player accordingly.
Servo Control Unit
This unit communicates with the digital servo unit and controls player
processing.
Video Control Unit
This unit analyzes video control commands received from the communication
control block to control output video signals.
Audio Control Unit
This unit analyzes audio control commands received from the communication
control block to control output audio signals.
Focus Servo Unit*
This unit controls the focus servo mechanism.
Tracking Servo Unit
This unit controls the tracking servo mechanism.
Slider Servo Unit
This unit controls the slider servo mechanism.
Spindle Servo Unit
This unit controls the spindle servo mechanism.
(See Player Control Block diagram on next page.)
LD-V4400 Internal Player Controls
F-2
TP 116
v1.1 • 9/93
Appendix F LD-V4400 Internal Player Controls
* A
servo unit
constantly takes readings for focus, tracking, spindle operations, etc, and provides
information to the player so it can make appropriate adjustments.
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