The AEG AJM 6820 Jetmaxx vacuum cleaner contains an ST BTB16/600BW TRIAC riveted to a heatsink. In my case not very firmly. This instructable shows you how to replace the TRIAC with a BTA24/800BW (24 Ampere / 800 Volt) TRIAC.
After the vacuum cleaner shut down suddenly during operation, but turned back on after cooling down, the vacuum strength seemed to have diminished. I took it in for repair, but got it back unrepaired because they couldn't find anything wrong.
Today it shut down again multiple times and I decided to replace the TRIAC with a new one I got from eBay. After replacement the suction power was back to when I first bought it: at some points it lifts the carpeting off the ground making it difficult to move the brush.
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Step 1: Disassemble
- remove HEPA filter cover and filter
- unscrew all 4 T20 torx black screws holding the top cover in place
- remove black seal gasket
- on the backside gently push against the top cover above the clips shown in picture 4
Tip: Double-click an image to view all sizes
N.B. The 4 chrome colored screws (also T20 torx) connect the vacuum engine to the chassis. They don't have to be unscrewed to replace the TRIAC.
Step 2: Remove Circuit Board
- remove black tubing (provides airflow to heatsink of TRIAC)
- slide circuit board out of plastic holder
- set vacuum power slider to maximum and remove slider by pulling upwards
Step 3: Replace BTB16/600 With BTA24/800
- with a 4mm drill bit remove heat sink from circuit board
- desolder BTB16 TRIAC (heat one solder joint and smack circuit board against the ground splashing the solder off of the circuit board or use a desoldering tool)
- solder three wires where the legs of the TRIAC were
- connect a new BTA24 TRIAC with a heat sink to the other end
- position and secure heatsink firmly in place
- direct the black tubing to the new heat sink
- finished! gently click and screw the cover back on.