Much better photo. I can zoom in on that and fill my monitor screen with the switch. I can read the switch rating stamped in the side too.
One thing which looks strange is there are no solder tabs, there looks to be some type of receptacle for a plug connector on the bottom of the switch, is this correct? Did you just unplug the wire harness from the switch when you removed it?
The green thing is an industrial rectifier (AKA Diode)
A common equivalent is ECG 5804, 400V peak reverse volts 3 Amp
(looked it up in my ECG manual)
You may be able to replace that with a double pole double through center off switch. How did the switch work? Up high, center off, down low?
You may also be able to replace just the top half of the switch because it is usually the delicate sliders that burn up. Just pry the tabs out gently and be careful when you pull the top off so you know the configuration of the sliders that will fall out if not very careful.
Here is a photo of the bottom of the switch. The slider went from bottom to top - off - low - hi. There are no soldering tabs, just push in the wire.
Upon taking the switch apart, i noticed there are three brass tabs (one for each mode i would imagine) that the slider moves over. The center one is completely disintigrated. I have attached photos as well of this.
I too was thinking diode when I saw that polarity band in the sharper photo, but I didn't turn up anything when I did a search on the 3S3 part number as a diode.
All this must be way over the heads of the sparky's as no one has chimed yet. :rolleyes: :D
Black and Decker called me today - apparantly my jigsaw was discontinued in 1972. The green thing is a diode the guy said, but there is no replacement switch available through B&D, modern or ancient.
You have the old switch, figure out what wires are connected in the various switch settings (including the diode), Go to any of the suppliers listed above (even Radio Shack - Source now) should have a switch like Bob posted. You likely wont find a 3 position switch with off at the top but you should easily find a double pole double throw with a center off. Wire it up so that with the switch up the wires are connected via the new switch that made the saw run on high with the old switch. With the new switch down wire it up so that the wires that were connected on the old switch in low speed are now connected via the new switch. So now you have switch up = high speed, switch middle = off, switch down = low speed. If you wire the double pole switch across both switches you are in effect using the two switches in parallel and doubling the rated amp capacity. If the above is not clear I can make a house call, Pickering is on the way home most nights, beer on you
Are there only two wires that go to the switch?
I looked at the source, but they had no slide switches. I also checked HD, TLC, and a few local shops. Nobody seems to stock slide switches. The switch was wired orginally as off - low - high (wires slots being Empty, Black wire, Red wire). The black wire was coming from the power source and wentering the switch in slot #2. The red wire was leading from the switch to the jigsaw motor (slot #3). Slot #1 was empty. There is also a white wire feeding from the power source and then pigtaling in the handle and running to the motor (no surprise).
The diode connects slot #1 and slot #3. Isn't thay weird? Logically i would think it would be #2 and #3, right?
Nope not weird, thats what I figured. The diode is 1960's variable speed.
When in high the switch shorts red to black. When in low the diode is inserted between the red and black effectively cutting the voltage supplied to the motor in half. What the diode is doing is blocking the top half of the A/C waveform.
finding this switch, even an on-off-on swith it the proper amprage is getting frustrating. This is due mostly to the fact that the canadian websites don't list the amperage rating on their switches. I'll have to wait until tomorrow and contact customer service via telephone.
What does Double Pole mean when purchasing a switch? What about Double Throw?