Open the cover of this machine , intuitive discovery of 250W8A AC input delay fuse . In the road test microwave tube socket filament resistance is normal, and the resistance is infinite and the shell ; high-voltage transformer input , output coils are normal ; voltage capacitors , high voltage breakdown diode shorted now no organization . Open the high pressure insurance single fuse intact (Q.75A/5kW). Pull back to see the computer and barbecue tube , no short circuit places ; Screenshot easily test various pieces , were normal. What is the reason it burned insurance ?9wPservice manual download site

Stop , door control switch carefully examined : the contacts good when trying to close the door and found the door frame assembly from side to side , with the door hook swings out great .9wPservice manual download site
 9wPservice manual download site

To test whether the point of failure on the door hook and gated components, I installed on a normal fuse (8A 's ) . Try to open the door , but by monitoring changes in the power plug at both ends of MF47-6 multimeter , when the hand sliding door , sliding door hook up nearly 2 /3 . Hands jumps to OΩ ( At this point one should not make sense . Slightly short description gated switch in advance , of course, if you live at this time , the insurance will certainly burn . , Look carefully gated components , namely screws loose, gated shift assembly bit ; Second gated components mounted on a thin metal screw is not loose, every time the door switch , dramatically shaking ( I tried several times ) in order to eradicate this risk, made ​​the following treatment: first gated . component reduction, tighten down the screws , while monitoring when opening doors, sliding door hook up decoupling , multimeter pointer (Rx10 block ) is 600Ω ( light bulbs inside the machine resistance ) . then a long 14cmx width 8cmx of 5cm thick plastic sheet by connecting the gate processing components within the box after using self-tapping clench , when the door switch is no longer shaking feeling.

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