Voltronic Axpert VM IV - Page 22

20
Parts
Attribute
Reference values
Failure status
R48/R144/R140/R137
Resistor
39 ohm
Open or other values
R139/R145/R150/R152
Resistor
10 ohm
Open or other values
D5/D6/D12/D16
1
Resistor
+ to -: 270k
- to +: OL
Short or explosion
Diode
+ to -: 0.6V
- to +: OL
Note1: When test the diode; please remove the R139/R145/R150/R152 from the board,
ortherwise the test result is not right
Optocoupler: U1/U2/U3/U4/U12