IPF 9100 Multisensor error

[teckat]

A simple new question.
I check some other element on carriage PCB broad.
i found a fuse (FU302) that was actually resistor with 501 code, that means must have 500 ohm,
but with multi-meter this resistor is short circuit with approximate 0 ohm.
is this another fault ?
Attachment 30846
bigger picture
Attachment 30848

Follow the bus line on board to see what it protects up and down
also look on underside of board for burn outs

[xsaver]

Follow the bus line on board to see what it protects up and down
also look on underside of board for burn outs

underside of broad seems be OK!
fuse (FU302) on Carriage PCB pass-though 32V from Main PCB to Source pin on All(4) MOS-FET transistor on Carriage board.
you know is that fuse or dead resistor (short circuit resistor)?

[MKalnins]

I use normal soldering iron to replace. not use any type of hot air or heater.

That is not what was implied. When soldering at the PWB level, whether the component is through hole or SMD, it is HUGELY important to protect the surrounding components from the heat. At the very minimum, any component that is on the same bus and near to where you are attempting your fix, has to have the heat sinked away. I'm probably right in assuming the iron you are using has no way of controlling the output temperature and without that, even attempting a board level repair is an exercise in futility. Replace the board.