Furuno FCV-1200L - BASIC OPERATION; Portrait Unit Key;Control Operation

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3. FUNCTION OF EACH UNIT
3.1 Display Unit (MU-101C)
The Display Unit (MU-100) consists of DISP board (06P0238), LCD Inverter board, and LCD Unit.
Figure 3.1 shows the system block diagram of the Display Unit.
Figure 3.1 System block diagram of Display Unit
The DISP board contains LCD interface circuit and switching regulator circuit. The LCD interface
circuit converts the analogue R, G, B signals from the Transceiver Unit into six-bit digital R, G, B
signals and outputs them to the LCD unit.
H-SYNC, V-SYNC, and CLK (dot clock) signals generated by the Transceiver Unit are also sent to
the LCD Unit by the DISP board through the LCD Interface circuit.
The switching regulator of power circuit generates 5V and AD5V for internal digital circuit, and
12V for the LCD inverter board.
The LCD unit consists of LCD module (10.4-inch screen, TTF color LCD), LCD control board, and
fluorescent lamp for back-lighting.
The LCD inverter board generates AC pulse signal (high voltage) for the fluorescent lamp and it's
pulse length is controlled by the YC signal to control the LCD brightness.
LCD I/F
H-SYNC, V-SYNC, CLK
LCD Unit
5V
A/D CON.
AD5V
Switching Regulator
FUSE
F1 3A
12VDC
(10 to 16VDC)
Inverter
R, G, B,
BRILL
R, G, B,
HSN, VSN, CLK
12V
5V LCD
TRXTD-A/B, CONTD-A/B, PWRSW-H/C
DISP 06P0238
CN-2
CN-3
NMEA
Transceiver
Unit
CN-1
Control Unit
YC