Hi all,
Another task I have been given..
It's a Seikosha clock and - from what I have been told - is the original name for Seiko.
I was asked to see why this clock wasn't working. On taking it apart I found a mass of corrosion around the crystal and (what I think), is a Resistor and all around the IC and the wires to the coil.
I'm sure that the corrosion was from a battery.
I have done my best to clean it up, but when I 'really' lightly touched the crystal (C), it popped off!
From my understanding the crystal isn't polerised.
The metal contacts for the crystal were very badly corroded and had tons of gunk on them.
To explain the horrible soldering: The metal that the C was connected to did not want to be soldered! So I had to wrap some very thin wire to the back of the post, solder that up tight, then connect the C's legs.
I think there is a Resistor on POS side, but so much gunk, I haven't been able to take a reading as I'm scared of damaging the existing contacts. It's hard to solder as the contacts are sat on a plastic housing.
The coil (Solenoid), must make the little cog that sits into that small opening of that metal plate that one can see 'north' of the IC and I guess make it spin in short pulses...?
Any ideas on how can I see, using a multimeter, if the Coil is actually working or in fact the IC has gone or even testing the Crystal..?
When I put the battery in, the little cog (which must have a metal base), does nothing when inside the perimeter of that metal plate.
PS: I have checked the Ω on the contacts I have solder and there's no touching.
Cheers,
GT250.
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