[Help] Seiko D138-4000

[Alex]

Hello everyone,

I get this Seiko some days ago.
When I opened it, the battery was inside.
I put a new one but only light works.

I want fix it, I love this model, but I don't know how. Any help will be apreciated.
Check the photo of the module please

https://dl.dropbox.com/u/4582594/WP_001514.jpg

The green zone must be removed?



Cheers

[elceedee]

Hey,
Looks clean and functional from this side (on the picture)
Here's a link to the service manual, might be of some help;

http://www.seikodigitalwatches.com/BXXX-UXXX/D138A.pdf

[charger105]

I was about to say, "Thats a G757 module !", but then I noticed no trimmer hole and no battery indicating resistor. It's incredibly similar to a G757 module though.
I suggest removing the 2 screws to see if there's any corrosion on the other side for a start.

Rgds.

[Old Tom]

Jules Borel still have circuit boards for these at $38.00- may need to check latest price- (and they have LCD screens as well)- the board is just as unreliable as the G757 and the screens not much better (!).

If you have the correct test equipment then you can check the current, check to see whether the oscillator is running and there is a test point to check the panel voltage upconverter stage. Without this equipement all you can do is clean it, wiggle the trimmer capacitor to clear any debris between the plates and make sure everything is making contact where it should.

[Alex]

Thank you all for the help.
Unfortunally the module is dead.
a piece of gold line in the module fade...
I will take a picture asap.