7.2.2.5 Major parameters of CHARGE section
The most likely problems occur on the CHARGE section including broken MOSFET,
broken Diode, damaged relative driver resistor and driver IC with broken MOSFET.
Checked components Instrument function
Reference
Value
Failed Condition
Q11,Q12,Q13,Q14
(S, D) Diode Voltage Droop
0.5V
Short or open
(G, S) Resistance
4.7kΩ
Short or open
R39,R40,R41,R42,R49,R50,R52,R53
R101,R102
Resistance
10Ω
Short or open
D14,D15,D17,D18(need be removed
from PCB)
Diode Voltage Droop
0.6V
Short or open
D13,D19 Diode Voltage Droop
0.6V
Short or open
D16,D20,D22,D23 Diode Voltage Droop
0.4V
Short or open
U3,U4
Power Pin(Pin11-Pin15) Resistance 500kΩ Vdd short to GND
Power Pin(Pin7-Pin6) Resistance 300kΩ VB short to VS
Power Pin(Pin3-Pin2) Resistance 500kΩ Vcc short to COM
O/P Pin(Pin1-Pin2) Resistance 4.7kΩ Short or open
O/P Pin(Pin8-Pin6) Resistance 4.7kΩ Short or open
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