ELECTRIC BELL
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MAIN COMPONENT OF
ELECTRIC BELL | ||
| Important parts of an electric bell are : 1. Electromagnet 2. Armature 3. Spring 4. Armature rod 5. Hammer 6. Gong |  | |
CONSTRUCTION
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| One end of armature winding is connected to terminal T1 and the other to a spring, which is mounted on a soft iron strip. A rod is attached to the armature and the free end of the rod carries a small hammer, which strikes a bell. A very light spring is attached to a screw, which is joined to terminal T2. | ||
WORKING OF ELECTRIC BELL
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| The electric circuit is completed through a battery and push switch button connected to the terminal T1 and T2. When the push button is pressed the electric circuit is completed and the armature is attracted towards the electromagnet as a result, the small spring gets detached from the screw due to which the electric circuit is broken and the electromagnet is demagnetized. Hence, the attraction disappears and the armature is brought back by the spring to its original position. Contact of the spring with the screw is now remade, which completes the electric circuit. The action is repeated over and over again consequently. The armature vibrates and hammer attached to it strikes the gong and the bell rings and sound is produced. | ||
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SONY Trinitron KVG14Q2 Repair Help FROM MY SERVICE TABLE TODAY
TDA8374A (Chroma) _STR S6707 (SMPS switching) _LA7830 (Vertical Scan Output IC) _ Sharp PQ 09RE 11 (9V controlled voltage regulator IC) _ 2SD1877 (Horizontal Scan Output Transistor) _NX1733/m (FBT/LOT) Set received for repair with no picture condition; today . On power ON, the standby LED blinks 3 times and then shuts off. As the standby LED blinks, at least once time, it is clear that the SMPS section circuit to this set is working properly. But, the main system control mcro-computer IC detects something short circuit with any component/s at the main board. As the set is a very old model, the spare part availability will be somewhat difficult. So; I should take much care with work; not to damage more components. I opened the back cover. A visual inspection is done for any damaged component/s on-board. Such as bulged/shorted capacitors, damaged IC/s and such. I foun...
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