Operator Board Maintenance Instructions
Need to be aware of
：
An abnormally high voltage rise in the boost circuit can lead to the calculation board finally 6 Voltage domain. LDO
Damage
，
also easily lead to chip damage. While the boost voltage the exception is mostly U110
、
R812
、
R811 Oxidation-induced.
5
、
DC-PIC
：
PIC16 (L) F1704 Composition As shown in figure 13 and Figure 14
：
A device that stores the frequency information and voltage values of an operational board chip
，
It also allows control of the operational DC-DC Output voltage.
13
、
PIC Schematic diagram
14
、
PIC
6
、
DC-DC Circuit
：由
LM27402SQ
与
CMOS
管
TPHR9003NL Composition Figure 15 below and Figure 16 is shown
：
15
、
DC-DC Schematic diagram
9
PIC is running, every minute, we need to control the heartbeat signal.
，
if
not, With heartbeat information, PIC will work for one minute and then
shut down.
PIC pin 1 is VDD 3.3V, 14 is GND, pins 9 and 10 are connected to the I2C
bus of the IO port to the control board, pins 5, 6, and 7 are PIC addresses;
pin 4 is PIC3 .3V; pin 8 is PIC.
FB output, control DC-DC voltage; 11 pin is EN signal of PIC output, control
DC-DC working status.
Figure 15
