Question about DCS WO-230 Electric Double Oven
Digital display on front panel - lights are dim to unreadable. We have no idea how to proceed, but need to do so that we can read the temperature of the oven. Thanks, Jami
I have the same problem with mine. Do you know what the approximate cost for the repair is?
Posted on Jun 24, 2008
Mine had the same problem. Got a replacement display unit from the local appliance store's parts dept for around $125. Installed it myself, problem solved... for now.
Posted on Jul 18, 2008
Fading is sometimes a problem with VFD displays. Light output drops over time due to falling emission and reduction of phosphor efficiency. How quickly and how far this falls depends on the construction and operation of the VFD. In some equipment, loss of VFD output can render the equipment inoperable. Emission may usually be restored by raising filament power. Thirty-three percent voltage boost can rectify moderate fade, and 66% boost severe fade. This can make the filaments visible in use, though the usual green-blue VFD filter helps reduce any such red or orange light from the filament.
You first need to identify whether it is the display itself which is at
fault, or the circuitry which drives it. Dim displays fall, I would say,
roughly 50 / 50 into low drive volts, and worn out. Often, the drive volts are derived from a voltage multiplier, and it is very common for the input capacitor to dry out and go low value, which leads to a low supply. This is typically about -30v DC when correct. The filament supply, which you can normally measure at about 1.5 to 3v AC, is usually floated on top of the -30v, so that is a good place to measure it. Most VFDs have a pair of pins at either end of the main row. Measure across these to check the AC filament supply, and from either one or the other to ground, to measure the negative supply. If these are all in order, then the display is worn out. Often, when it is worn out, there will be patches that are brighter than the rest. You may be able to squeeze a bit more life out of it by boosting the filament supply a tad, but if you go too far, the filament wires start to glow a little, and may become visible.
Posted on Dec 25, 2008
The VFD (Vacuum fluorescent display) will need to be changed, this means that the control clock will have to be changed unless you can find a local company to re-build it.
Posted on Mar 11, 2007
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