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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
Drivers (This part is only used for repair checking)
Meanwhile, we also need to check the driver tubes of these power tubes.
R91/R102/R96/R101: (22R 1206)
R90/R99/R94/R97: (0R 1206)
D32/D35/D33/D34: (1N4148W 0.15A 75V SMD)
Parts
Attribute
Reference values
Failure status
R91/R102/R96/R101
Resistor
22 ohm
Open or other values
R90/R99/R94/R97
Resistor
0 ohm
D32/D35/D33/D34
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.
2.3 Check the buck circuit on MAIN board
Power devices
BUCK MOSFET and Diode:
Q31/D13