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1. Key detection point
Test1
Test2 Test3 Te s t 4
Test5
E
G
I
H
F
D
B
A
C
L
Test9
Test6
K
J
Tset7
M
N
Test11
Test10
Test8
S
T
Test12
Fig. 37 – Key detection point
Test No. Test Poi n t Corresponding component Test value under normal condition
Test 1 Between A and C Neutral and live wires 160V- 265V
Test 2 Between B and C Neutral and live wires 160V- 265V
Test 3 Between D and E DC busbar electrolytic capacitor DC 180V- 380V
Test 4 Between F and G Electrolytic capacitor of power DC 180V- 380V
Test 5 Two ends of diode D15 D15(IPM modular +15V power supply) DC 14.5V- 15.6V
Test 6 Two ends of electrolytic capacitor C715 C715 (+12V power supply) DC 12V- 13V
Test 7 Two ends of electrolytic capacitor C710 C710 (+5V power supply) DC 5V
Test 8 Two ends of electrolytic capacitor C226 C226 (+3.3V power supply) DC 3.3V
Test 9 Two ends of chip capacitor C912 C912 (+17V power supply) DC 15V- 18V
Test 1 0 Between M to GND
Point M of R75 to ground (signal sending
port of ODU)
Fluctuate between 0- 3.3V
Test 1 1 Between N to GND
Point N of R123 to ground (signal
receiving port of ODU)
Fluctuate between 0- 3.3V
Test 1 2 Between S and T Power supply of communication ring DC 56V
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