Furuno 1622 User Manual

2.2
!
Display Unit
4
2.2 Display Unit
The display unit features that;
1) DU Board produces LCD back-light voltage of 210VAC.
2) An artificial echo signal (instead of the video signal) can be selected.
3) The interface communicates with the scanner unit in RS-422 format.
The TX trigger is made at the gate array (!) and is fed to the scanner unit. The received video
signal is A/D converted and is sampled at the gate array (!). The echo on each sweep is stored
on the V-RAM via the gate array ("). Upon receiving the heading pulse, the stored data are
output to the LCD in four shades of gray, according to echo strength.
Figure 2-2. Block Diagram of Display Unit
FTC
A/D CONV.
CPU
I/F
I/F
FILTER
DC-DC
CONV.
R-C
CONV.
DU Board
03P9268
PANEL Board
PNL9194
ROM
RAM
GDC
V-RAM
GATE
ARRAY
(
)
GATE
ARRAY
(
)
LCD
EEPROM
03S9461
VIDEO
From Scanner
From NAV AID
NMEA
RS-422
BP-HD
To Scanner
From Scanner
To Scanner
Ship’s Mains
To Scanner
U105
U114
U126
L1,L2
U6,Q6,T1
Q52,Q53,T2
ADJ
U119
U109
U115
U108
U107,C104
R112
U101
U111
U108
U113
U116
U112
TRIGGER
5V
12V
6V
22V
AC210V
Back-Light volt.

Furuno 1622 Specifications

General

Brand	Furuno
Model	1622
Category	Marine Radar
Language	English