Voltronic Axpert VM IV - Check the Bus Soft Start Circuit on MPPT Board (TX1: Especially for 09 Fault)

28
Q19
Resistor
BC: 361.9k
BE: 411.6k
Short or explosion
Diode
BC: 0.598V
BE: 0.611V
U23
Diode
PIN5 TO PIN7: 0.492V
PIN5 TO PIN6: 0.639V
Short or other
values
Resistor
PIN1 TO PIN3: ohm
Short or other
values
C176
Capacitance
33uF/450V
3.7 Check the bus soft start circuit on MPPT board (TX1: Especially for 09 fault)
The D82 are (RHRP8120 8A 1200V UFST)
The R238 are (RES 0.62 J)
The MOSFET Q17 are (IRFBG30 3.1A 1000V TO-220)
The D67 and D73 are (MUR4100ERLG 4A 1000V UFST)
The U18 are (IC PWM UC3845BNG DIP-8)
The TX1 are (TX 55:200:44 FER EEL16)
The R260 are (22R 1206)
The R235 are (1KR 1206)
The R258 are (1.2KR 1206)
The C176 are (33uF 450V)
Note: If R260 is damaged, please replace U18 together.