Genesis Heat Gun Rectifier Diode Replacement

Written By: Uchenna Oniah
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Genesis Heat Gun Rectifier Diode Replacement

Difficulty

Moderate

Steps

9

Time Required

No estimate

Introduction

Follow this guide to replace the rectifier diodes on a Genesis GHG1500A Dual Temperature Heat Gun.

If you find that the heat gun is not working and your multimeter indicates a shorted diode, then this guide should help.

I recommend replacing all 4 diodes so that all of the diodes have the same specs. This should reduce the likelihood of compatibilty issues in the future.

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    • Be sure the heat gun is unplugged before starting this process.

    • Remove the barrel casing on the end by twisting and pulling it off.

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    • Remove the seven 14mm screws from the side of the drill using a phillips screwdriver.

    • You will need a screwdriver with a long enough neck to reach into a couple of the screw wells.

    • Remove the top casing to reveal inside of drill.

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    • Using a phillips screwdriver remove the two 12.5 mm screws that are holding the fan housing to the bottom case.

    • Lift switch out of the bottom case.

    • Lift wires out of their retaining slots.

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    • Seperate the fan unit from the plastic housing that is attached to the metal shield.

    • Position fan and metal shield so that you can comfortably work on the circuit board located on the top of the motor.

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    • Method 1 (1 soldering irons)

    • Quickly move the soldering iron back and forth between both ends of the diode while adding fresh solder until the diode is released from the pads.

    • Method 2 (2 soldering irons) [Photo 2]

    • Heat up both soldering irons.

    • Add fresh solder to both ends of the diode. (Photo 1)

    • Hold iron onto the end of the diode and feed solder onto the board right at the tip of the soldering iron.

    • Hold soldering irons on both ends of the diode and lift the diode off of the circuit board once the solder melts. (Photo 2)

    • Repeat the above steps for the remaining diodes.

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    • Remove excess solder from pads. (Link to desoldering video and the importance of flux)

    • Add flux to the pads

    • Apply flux to desoldering wick braid

    • Place desoldering wick braid on top of the pad

    • Press the iron on the braid until the solder on the board wicks into the braid.

    • Repeat above steps for the remaining pads.

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    • Add flux to pad. (Photo 1)

    • Add small amount of solder to the tip of the iron. (Photo 2)

    • Use tweezers to hold the diode centered in between both pads. (Photo 3)

    • Touch the iron to the pad to tack the diode into position

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    • Add flux to second pad. (Photo 1)

    • Hold iron onto the second end of the diode and feed solder onto the board right at the tip of the soldering iron. (Photo 2)

    • Revisit the first end of the diode and repeat the step above to ensure a sufficient amount of flux is on the pad. (Photo 3)

    • Use isopropyl alcohol on a q-tip to clean any excess flux left on the board.

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    • Repeat steps 7 and 8 for the remaining diodes.

    • Makes sure the diodes are arranged correctly, in order for the AC input to be rectified into a DC output.

    • Take note of the end of the diode with a line through it.

Conclusion

To reassemble your device, follow these instructions in reverse order.

Author

Uchenna Oniah

Member since: 25/01/19

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