Introduction: Repair the Parkside PHGL600 Hot Air Gun.

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A few times ago, my historical hot gun decided to die suddenly during a small homework session.

This time I decided to repair it.

Googling this product the most common problem reported is the explosion of the capacitors used to reduce the voltage for the fan (see the schematic in the attached file), like in my case with the big 8uF cap.

The cost of the new components is almost equivalent to the cost of a new cheap hot gun, but it will come with the same (or worse) problem and we continue to produce electronic waste. After this upgrade, the Hot Gun will have a new long life.

Attachments

Supplies

  1. Solder 50W
  2. Wire cutter
  3. Screwdriver PH2
  4. Rotating saw for Dremel
  5. Dremel or equivalent.
  6. 8.0uF 250VAC type C4AF1BU4850F12K from KEMET, see MOUSER No. 80-C4AF1BU4850F12K or equivalent with these dimensions: LxWxH: 31.5x22x37mm.
  7. 5.0uF 250VAC type B32754C2505K000 from EPCOS, see MOUSER No.871-B32754C2505K000 or equivalent with these dimensions: LxWxH: 31.5x16x35mm.

Step 1: Select the Replacements

Indeed the capacitors are responsible for the problem.

The fan has 2 speeds produced by 2 capacitors of 8uF and 4.7uF both a 400VDC. Their original size is quite compact and finding a replacement was not easy. The main problem is that 400VDC is too close to the safety value to be used in these applications.

After some research, I selected better components with some decent sizes.

8.0uF 250VAC type C4AF1BU4850F12K from KEMET, see MOUSER No. 80-C4AF1BU4850F12K or equivalent with these dimensions: LxWxH: 31.5x22x37mm.

5.0uF 250VAC type B32754C2505K000 from EPCOS, see MOUSER No.871-B32754C2505K000 or equivalent with these dimensions: LxWxH: 31.5x16x35mm.

Step 2: Modify the Capacitor PCB

NOTE 1: Do not proceed further if you have no experience in electric repair!

NOTE 2: The Hot Gun MUST BE DISCONNECTED from the main power for the entire duration of the repairing


The repair consists of a few simple steps:

  1. Unscrew the wires and get access to the small PCB with the capacitors
  2. Desolder both the capacitors. For safety reasons, both of them will be substituted
  3. Desolder the 2 resistances of 15ohm and 27kohm. These will be soldered on the opposite side (copper side) of the PCB.
  4. The width of the PCB must be shortened to be equal to the width of the capacitors (31.5mm). You can use a cutter, a Dremel, or a hand saw.
  5. Resold the capacitors in the original places, the resistors on the copper side, and the wires

The photos attached will help you in the process

Step 3: Gluing the Capacitor PCB

The PCB can be glued as indicated in the picture on the black cover.

I used a hot glue. This is a cold side and the cover is used to entrain the air into the hot gun.

You can see that the components fit nicely in place.

Step 4: Closing and Test

The last step is to screw back in place the plastic covers.

Done.

Enjoy!