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当前版本: Philip Le Riche ,

标题:

Radio controlled clock runs an hour fast

文本:

A few years ago we bought a radio controlled analogue clock for my elderly mother-in-law which sets itself automatically from the MSF Rugby time signal. It seems to be this one: http://www.argos.co.uk/product/2552790

It successfully reset itself to Summer Time when the clocks went forward, but is now showing the time plus an additional hour. There's a "REC" button on the back which causes it to re-sync with Rugby, and when I pressed that it did indeed resync, but again, to an hour fast.

I haven't tried taking it apart, and wonder if anyone else has done so and can explain the behaviour. I suspect that behind the clock face it must have a series of circular tracks with contacts which allow it to detect where the hands are, or just 2 contacts which are closed when the minute and hour hands respectively reach 12 o'clock. Maybe the minute hand contact is dirty and isn't always detected. Can anyone, having taken one of these apart, throw any light on this?

设备:

Precision radio controlled clock

状态:

open

已接受的回答:

533450

原帖由: Philip Le Riche ,

标题:

Radio controlled clock runs an hour fast

文本:

A few years ago we bought a radio controlled analogue clock for my elderly mother-in-law which sets itself automatically from the MSF Rugby time signal. It seems to be this one: http://www.argos.co.uk/product/2552790

It successfully reset itself to Summer Time when the clocks went forward, but is now showing the time plus an additional hour. There's a "REC" button on the back which causes it to re-sync with Rugby, and when I pressed that it did indeed resync, but again, to an hour fast.

I haven't tried taking it apart, and wonder if anyone else has done so and can explain the behaviour. I suspect that behind the clock face it must have a series of circular tracks with contacts which allow it to detect where the hands are, or just 2 contacts which are closed when the minute and hour hands respectively reach 12 o'clock. Maybe the minute hand contact is dirty and isn't always detected. Can anyone, having taken one of these apart, throw any light on this?

设备:

Precision radio controlled clock

状态:

open