Need schematic diagram, some advice and ultimately replacement parts
. No power. Upon opening, found 2 coils burnt out. Need at least a schematic diagram, Could also use some technical assistance as well but definitely need a schematic to identify the circuit and components involved. Thanks, Roger
Re: Need schematic diagram, some advice and ultimately...
You have something in short circuit in power supply pattern, so filter coils are burnt. It may be voltage regulator, or regulating transistor, electrolytic capacitor or even shorted diode at pwr. input serving to protect in case of inverse polarity applied. Check all for short. Was it reverse polarity or overvoltage occured?
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Assuming that you have GE dryer DBXR463ED0WW, Sounds like there is a couple of problems there:
The start switch is stuck and needs replacement/repair, part number WE4X881
The clothes taking too long to dry may be due to a) clogged dryer vent; b) one or both heater coils burnt out; part numbers: WE11X10007 for restring coils only or WE11M23 for whole heater assembly c) problem with temperature selector switch, part number WE4M407
There might be a problem with timer (WE4M271), but before replacing it I'd suggest taking care of the long dry problem first. In some models, timers are wired that way so the timer advances only when there is heat, so check the schematic.
There should be a schematic diagram inside the control panel, use it to for diagnosing the problems you described.
You will need to open the back and look for burnt wiring or a bad heater coil. Unplug the drier.Pull the drier away from the wall, unhook the vent hose and remove the back protective cover. Looking closely at all the wiring, you may need a vacuum to get any lint out of the way. Check for burnt wiring to any control switches, most times they will burn at a terminal, all you have to do is replace the wire end, you can buy crimp on terminal ends from most any parts store. Next if no burnt wiring is found you have to check the coil. Look for large wires that hook to large terminals. You may need to get your hands on a Volt/Ohm meter to check the coil for a break in the coil. Remove the wires and read in ohms for a open circuit. If you get no reading you have an open coil and it will need to be replaced. Also it can be the timer but it is rare if all else is working.
Similar problem, maybe inherent to this sub, found wiring diagram ( can't remember where right now) R46 is 150 ohm - 1/4 watt. As informed by many sources - burnt resisitor just result of other fault - on replacement resisitor just smoked it up again. Have tech attempting to separate power supply from amp to locate problem. WIll post result if faulty component is located. Not much of a sub anyway - just can't bear to throw it away for cost of minor component.
If the resistors go to the gates of the power supply FETs, the FETs are probably shorted. Measure the resistance between the gate and the drain (no power applied to the amp). It should be at least several thousand ohms.