维修手册
专案名称：
Axpert VM III-5000/VM III-3000
专案编号：
S1711171
修订版次：
00
PAGE
V-RDP-004-73 A
The U9 is (IC PWM CNTL TI/UC3525AN DIP-16)
Parts
Attribute
Reference values
Failure status
U9
Resistor
PIN13 TO PIN12: 8.8k
PIN11 TO PIN12: 432k
PIN14 TO PIN12: 432k
Short or explosion
2.2 Check the bus side components on MAIN board
Power devices
DC/DC IGBT: Q27/Q28/Q29/Q30
For VMIII-5000 ALL of the IGBTs are (IGBT ST/STGW60H65DFB 60A 650V N BULK TO-247)
For VMIII-3000 ALL of the IGBTs are (STGW45HF60WDA 45A 600V NPN BULK TO-247)
Parts
(VMIII-3200)
Attribute
Reference values
Failure status
Q27/Q28/Q29/Q30
Resistor
GE: 22 ohm
GC: 184k
EC: 184K
Short or explosion
Diode
EC: 0.37V
CE: OL
Parts (
VMIII-5200)
Attribute
Reference values
Failure status
Q27/Q28/Q29/Q30
Resistor
GE: 22 ohm
GC: 205k
EC: 205K
Short or explosion
Diode
EC: 0.39V
CE: OL
Note1:
When you use the multimeter to measure the resistor of the transistor, because of
the capacitor in the circuit, it will cause the changing of the values when you measure the
CE and GE. So we recommend you measure the diode forward voltage of EC, and the
resistor of GE. These two values can reflect the situation of the transistor more correctly.
Note2:
If one or more of them were damaged, please replace all of them.
