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Revision to Connector and spare part numbers

David Crocker

* Fan 2 mosfet: TR1
 
To remove the old mosfet, you will need either a hot air desoldering tool with a small nozzle, or low melting point solder such as ChipQuik . If using hot air, the hot air is likely to melt or at least discolour the white plastic parts of the adjacent connectors. You can use a shield made from e.g. corrugated cardboard covered with Kapton tape to shield connectors and other plastic componentsthem from the hot air. Alternatively, pull the white plastic part off the pins using pliers (this is easier if you heat the pins to 180C with hot air first), and replace it afterwards. The new mosfet can be soldered in place using a fine-tipped soldering iron, or by putting a little no-clean flux on the pads, placing the new mosfet on top, and using hot air again. Hot air soldering/desoldering is much easier if you heat the whole board to about 100-125C on an electric hotplate.
To remove the old mosfet, you will need either a hot air desoldering tool with a small nozzle, or low melting point solder such as ChipQuik . If using hot air, the hot air is likely to melt or at least discolour the white plastic parts of the adjacent connectors. You can use a shield made from e.g. corrugated cardboard covered with Kapton tape to shield connectors and other plastic componentsthem from the hot air. Alternatively, pull the white plastic part off the pins using pliers (this is easier if you heat the pins to 180C with hot air first), and replace it afterwards. The new mosfet can be soldered in place using a fine-tipped soldering iron, or by putting a little no-clean flux on the pads, placing the new mosfet on top, and using hot air again. Hot air soldering/desoldering is much easier if you heat the whole board to about 100-125C on an electric hotplate.
 
==== Heater MOSFETs ====
 
Note when removing any of the heater MOSFETs there is significant heat-sinking into the copper of the board. A combination of hot air rework, Chipquick, and a heated plate maywill be needed to remove one successfully.
Note when removing any of the heater MOSFETs there is significant heat-sinking into the copper of the board. A combination of hot air rework, Chipquick, and a heated plate maywill be needed to remove one successfully.
 
===== Bed Heater =====

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