Samsung AQV12F2VE Service Manual page 35

NO Parts
4 Power TR module
PC 922
5
(IC3~IC8)
Samsung Electronics
1. Put the power off completely.
2. Discharge all of condenser completely.
3. Separate the transistor module from the inverter body.
4. Check the leak current between C and E and B by tester for 6 transistors
- +
BX BU
U EU
BY
BV
V EV
BW
BZ
EC W EW
Collector(C)
Base(B)
Emitter(E)
5. If the power transistor module is defective, check the parts of (PC3~PC8) of control board
out of inverter controller.
1
2
3
4
If the resistance between the 6 and 7 is a couple of Kohm, it is defective.
Check method
Tester rod
( + ) ( - )
-
U
V
W
BU EU
BV EV
BW EW
BX
BY EC
BX
8
Tester rod
( + ) ( - )
7
7
6
6
7 6
5
Troubleshooting
If it is good one
resistance
+
U
V
10KΩ ~ 500KΩ
W
+
400Ω ~ 500Ω
If it is good one
resistance
∞
5-11