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Monday, December 23, 2019

Repairig a Battery Operated Clock


23 December 2019

The Clock stopped. What can be wrong? What can I do about it?

Should I replace it? Replace the motor mechanism or the whole clock?

What can be wrong?

Nowadays, battery operated clock comes with a clock motor and other parts and components.

The mechanism are pretty simple and they seldom breakdown.  The use of Alkaline Batteries are usually the common cause of breakdown. Users should use only the common Zinc Carbon Batteries instead.

Many users thought that the Alkaline battery is better as it last longer. Nonetheless, these battery's electrolyte often leaks. Over some time, it would “smear” all over the clock's mechanism. This cause short circuiting in the electronic components.

How to determine the cause?

By simply measuring the resistance of the battery terminals. A good clock will give at least about 8 to 10 mega ohms, the bad one will only get about 1 Mega ohm.




To Replace or Not to Replace

If the clock is a sentimental one, it is worth to change the clock mechanism which is usually cheap. Nonetheless, some would choose to repair the clock.

How to Repair?

The repair work involves the use of dish washing liquid to get rid of the electrolytes. After that, drying them with dry paper towels and hair dryer.

What is inside the clock mechanism?

They consisted of few components as shown

1. A motor that consist of copper windings and the electronic board

2. A set of about 7 gears

3. The battery connecting strips

4. The split plastic casing 
How to repair?

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