Veichi AC310 - Page 31

30
AC310 Universal AC Drive Service Manual
Backside REF-H REF-L circuit
Front side REF-H REF-L circuit
Backside REF-H2 REF-L2 circuit
⚫ Output detection at each voltage point: Measure the voltage value of each circuit
with a multimeter at DC level.
Control board
backside
Red Pen
24V
15
-15
10
3V3D
REF6V
Black Pen
COM
GND
Range
±1.2V
±0.75
±0.75
±0.2V
±0.06V
±0.12V
Red Pen
REF-H
REF-L
REF-H2
REF-L2
REF3V
Black Pen
GND
Voltage
4.755V
1.245V
4.304
1.696V
3V
4.665 ～
4.862
1.207 ～
1.257
4.204 ～
4.376
1.667 ～
1.735
±0.05V
⚫ The ±15V and 24V on the control board are taken directly from the power board, 3V3D
and 10V are converted from 5V and 15V respectively.
⚫ 3.3V voltage is for MCU power supply, if the voltage is high, it will lead to CPU damage;
if it is low, it will make the CPU not work, and +10V, 24V voltage is convenient for
customers to use, it is easy for some terminals to set the signals. pins 13, 25, 38, 46, 61,
68, 79, and 93 on the CPU are all 3.3V voltage.