Is 1. illogical of electric circumstance detect judgement: ? 3 Qiong reads Kong Youdai of Yu of plum house cap putting in order? of shaddock of broadleaf plant common is ohmic, value of sub filament block is adjacent short receive. High-pressured winding block is worth 80~ 120 ohm. Different transformer difference is apparent.

 

Does 2. electrify detect judgement: ? Superintend and director of Qiong of be buried alive with the dead communicates town report by?20V, see sub voltage whether be inside limits. Filament 4V is controlled, high-pressured 2000V, the 2000V here is bad to measure. Common avometer measures voltage to do not have so tall. The likelihood passes derivative electric arc preliminary judgement. This needs experience. Also can carry voltaic electric current to assist judgement for nothing through measuring. Microwave oven controls voltaic 4A left and right sides with transformer.

 

In microwave oven the examination when working. First transformer disconnect even the line, the resistor file that uses avometer is measured. Primary winding 2. 2 Europe are controlled, 130 Europe control high-pressured winding, it is normal to be. High-pressured winding one aspect of the matter opens the land, want to measure the resistance of high-pressured winding, watch pen is received go up in motherboard; Another watch pen is received with high-pressured diode get on even the line. Filament winding is too thick too short, bad to measure, seldom also bad.

 

High-pressured transformer is precious component, it is fragile component. Appear very likely: Leakage of electricity of high tension line, short circuit, burn. We return the discovery in be being repaired, primary line wraps a line to do with aluminium unexpectedly, often have a contact with the solder contact of tab bad mistake.

 

Detect solution of detailed of capacitor stand or fall

 

1. Need to will measure an instrument to be set in highest resistor span;

 

2. Normal phenomenon:

 

A. Test capacitor two terminal, inside short time (solid jump) show guide, the resistor after charging next is 10MΩ about;

 

B. The resistor of terminal and crust should infinity;

 

3. Abnormal phenomenon:

 

A. Short circuit capacitor guides from beginning to end;

 

B. Open circuit capacitor shows because of the internal resistance of its 10MΩ from beginning to end about the resistance of 10MΩ ;

 

C. When the open a way of inside line wiring in high-pressured capacitor, can show an infinity resistance.

 

Microwave oven capacitance receives solution of law intent details

 

 

The scrutiny that ask a son issues this circuit to pursue, saw literal specification know.

 

1, left next horn are wiring electric graph. Some transformer secondary coil are down-lead (S0 direct hammer is on transformer core) , those who pursue medium is terminal structure, same.

 

2, the down-lead of filament coil is red, red commonly black, red white silica gel line, inside the line core of means of a 1 lines.

 

Want to say the capacitor of microwave oven, that is to point to the high-pressured capacitor inside machine, it has 2 wiring terminal apparently, additionally its crust also calculates terminal of a wiring. The crust of capacitor must join reliably with microwave oven housing, housing must join reliably with the ground wire of power supply cord, end of ground wire of outlet of power supply cord must be mixed the ground wire in socket is contacted reliably, the ground wire in socket must join reliably with the ground wire of power source system; The 2 wiring terminal on capacitor, the high pressure of transformer of one termination high pressure outputs end, the maximum pressure that another termination controls to be in charge of to magnetism inputs end.