5-1
5. MICROPROCESSOR

5-1. System Outline

The system microprocessor has features as shown below.
In considering easy maintenance for specification
modification, etc., the program content is written in the
built-in non-volatile memory.
The program is also developed in considering use of
structured notation, parts modularity, and multi filling
system.
Major functions of the system microprocessor are as
follows.
5-1-1. System Control
• Microprocessor program write process
• Non-volatile memory control process
• Remote control reception process
• RS-232C transmission/reception process
• Status read process
• On-screen display process
5-1-2. Normal Control
• Power ON/OFF
(Main/Fan/Lamp)
• Input switch (RGB/Video/Camera)
• Sound volume control UP/DOWN
• Menu
• Adjust (Up/Down/Left/Right)
• All mute ON/OFF
• Audio mute ON/OFF
• Display ON/OFF
• Freeze ON/OFF
• Resize ON/OFF
• Focus UP/DOWN
(at camera use)
• Zoom UP/DOWN
(at camera use)
5-1-3. Adjustment Control
• Video controls (high & low brightness ratio,
brightness, color density, tint, sharpness)
• Panel adjustments (V position, H position,
phase, clock, user registration, user read-out)
• Mode adjustments (Wide, MIC, OSD mute,
projection)
• Language adjustments (English, Japanese,
French, German, Spanish, Italian)
5-1-4. Adjustment Control at Factory Delivery
• Video sub adjustments (RGB gain, sub-bright)
• Drive adjustments (each item for panel controls,
RGB trimming)
Fig. 5-1-1 shows the system block diagram.