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Test point No.
Test point
Test 1
Between A and C
Test 2
Between B and C
Test 3
Between D and E
Test 4
Between F and G
Test 5
Two terminal of diode D10
Test 6
Two terminal of flaky capacity C56
Test 7
Two terminal of flaky capacity C58
Test 8
Two terminal of flaky capacity C83
Test 9
Two terminal of flaky capacity C80
Test 10
M forward to GND
Test 11
N forward to GND
Test 12
O
Test 13
P
Test 14
Q
Test 15
R
Test 16
Between S-T
Corresponding component
Neutral wire and live wire
Neutral wire and live wire
Electrolytic capacity of DC bus bar
Electrolytic capacity of switch power
supply
D10
(IPM
modular+15V
supply)
C56 (+12V power supply)
C58 (+5V power supply)
C83 (+3.3V power supply)
C80 (+17V power supply)
M terminal of R75 forward to ground
(outdoor signal send TXD)
N terminal of R78 forward to ground
(outdoor signal send RXD)
Receiving terminal of optical coupling
(audion side)
Sending terminal of optical coupling
(LBD side)
Sending terminal of optical coupling
(LBD side)
Receiving terminal of optical coupling
(audion side)
Power supply of communication ring
Test value under normal
situation
160V-265V
160V-265V
180VDC-380VDC
180VDC-380VDC
power
14.5V-15.6VDC
12V-13VDC
5VDC
3.3VDC
15-18VDC
Jump between 0-3.3V
Jump between 0-3.3V
Jump between 0.3-1.7V
Jump between 0-1.1V
Jump between 0-1.1V
Jump between 0-24V
56VDC
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