四、
Manipulate
3-8 Host interface(Figure 17)
Functional interface that:
（
1
）
USB interface function: Debugging for the Procedures of
manufacturer
Nose: Please don't use the USB interface connect to your computer or
any moving device, otherwise will cause the host have the
potential to a permanent death of phenomenon .
3. And then closed the door, test the host can automatically switch the
camera and video (blue character displayon the screen), and image
display also, a period of time (system latency video time) after the
upper left corner of the screen automatically red spots
disappeared,and then display video on the screen.
4. And then the door opened, it can automatically test the engines for
video (the blue screen time), and image display. Note this system is
normal
.
5. To use open or close the door, adjust camera angle to survelling the
position, and colored plastic screw, cover the protection of camera
cover, closed a good seal.
6. The data bus, the total power supply are received on-board power
supply on the negative electrode , The door to switch the system to
work normally, after commissioning of the entire system.
12
Figure 17
The second mefthod: (Figure 10)
Use the multimeter to measure the vehicle speed sens
or signal line and the voltage of<0.5V when in the
absence of speed, the voltage of speed signal line
voltage of>2.5V when the vehicle is running, NO.1
And NO.4 of the DIP should be opened at this time
synchronous , debugging the adjustable resistance until
have the signal of speed, and then measuring resistor R5
close to ICpoints when driving. so that the points voltage
Less than 2.5V.
The third method: (Figure 11)
Use the multimeter to measure the vehicle speed
sensor signal line and the voltage of between 0.5V-
2.5V when in the absence of speed, the voltage of
speed signal line voltage of<2.5V when the vehicle
is running and need to open NO.2 of the DIP switch
and debugging the adjustable resistance until have
the signal of speed on the screen.
Figure 9
The fourth method: (Figure 12)
Use the multimeter to measuring the vehicle speed
sensor signal line and the voltage of between 0.5V-
2.5V when in the absence of speed, the vehicle
speed sensor signal when the voltage of > 2.5V and
at this time must open NO.2 and NO.4 of the DIP
switches. Adjusting resistor until have speed, and
then measuring resistor R5 close to IC points when
driving, so that the points voltage less than 2.5V.
Note:(Figure 12)
(1) Hav’t connected to the head of line must be
packed with insulation adhesive tape, avoid bare
head happed accident.
(2) If the speed amplifier failure, can be pull NO.3 of
DIP switch, and start to use the backup amplifier.
(3) When open the NO.1 switchR5 close to IC point's
voltage could be selected to debugging in the1.5V;
Figure 10
Figure 12
Figure 11
09
The abs enc e of spee d, the vol tage of spee d Signa l line Vol tage of<2. 5V
when the vehicle is runni ng, NO.1 ofthe DIP switch shoul d be ope ned .At
this time,deb ugg ing the adj ustabl e esistanc e Until display r spee d on the
screen..
Sensor signal line, and the voltage of <0.5V when in the absence of
speed,the voltage of speed signal line.
