Axpert Max 7200 - Check Buck Circuit Components

维修手册
专案名称：
Axpert Max 7200-48
专案编号：
P1911061
修订版次：
00
PAGE
V-RDP-004-73 A
D32/D60/D35/D62/
D33/D61/D34/D66
1
Resistor + to -: 270k
- to +: OL
Short or explosion
Diode + to -: 0.6V
- to +: OL
Note1: When test the diode; please remove the R90/R99/R94/R97 from the board, or the
test result is not right.
3.3 Check the buck circuit on MAIN board
Power devices
BUCK MOSFET and Diode:Q32/Q42/Q58
For Axpert Max-7200 the IGBTs Q32 /Q42 are (IGBT ST/STGW60H65DFB 60A 650V N BULK TO-247)
The Q58 is (APT/30DQ60BG 30A 600V UFST RAD TO-247 BULK)
Parts Attribute Reference values Failure status
Q32/Q42 Resistor GE:17.07k
GC: 209.3k
CE: OL
Short or explosion
Diode CE: OL
EC: 0.393V
Q58 Resistor + to -: 193.9k
- to +: OL
Diode + to -: 0.383V
- to +: OL