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Cartier/Ebel 81 main board check

Marcelo
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Marcelo Member

Marcelo

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Since i'm not very knowledge in quartz movements i'm here to wander if your guys can help me out. I recently bought this Cartier tank that comes with the cal. 81 inside. The battery leaked, and after test the coil i saw that is was broken. But when testing the main board one problem appeared. I tested with an analog multimeter i don't have the properly tool to test. I contact two watchmakers with proper tools but they only do if you pay them a full service...

In the video that i learn how to test both coil and board, the board from the video don't behaved the same way that my did. The resistance from the cal. 81 goes way up and after i time goes back and starts to beat as it should, both points.

My doubt is whether the board is in good condition considering that way i use to test, because i want to buy one coil but don't want to spend $150+ for nothing.

 

My cal. 81 video: video

Video that i learn how to measure: video

 

 

HectorLooi Distinguished Member

HectorLooi

Posted
Posted

I have seen pcbs behave this way before but work perfectly fine with a battery put in.

Why don't you reassemble the watch and put a battery in and observe it for awhile.

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Marcelo Member

Marcelo

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35 minutes ago, HectorLooi said:

I have seen pcbs behave this way before but work perfectly fine with a battery put in.

Why don't you reassemble the watch and put a battery in and observe it for awhile.

Thank you for the information. I can't reassemble to see bcause the coil is broken.

JohnR725 Distinguished Member

JohnR725

Posted
Posted
16 hours ago, Marcelo said:

In the video that i learn how to test both coil and board, the board from the video don't behaved the same way that my did. The resistance from the cal. 81 goes way up and after i time goes back and starts to beat as it should, both points.

your video shows something very bizarre like what exactly are you trying to do? Are you trying to measure the resistance of an integrated circuit?

16 hours ago, Marcelo said:

Video that i learn how to measure: video

I think I've seen this video before somebody else might have found it? Well I really can't say anything nice I definitely would not follow the testing procedure as it's a waste of time. a more appropriate test beautiful with the manufacturer recommends as opposed to this.

it would help if you have the service guide I've attached. if you had all these quartz test equipment we could check for things like is the quartz crystal oscillating or we could measure current consumption but you lack all of them.

We know from the service guy that this watch steps every 20 seconds. We also lack a lot of test points but you can't get to where the coil is in other words to test points in the power going to the coil as shown in the image I found online.

image.png.75d7b2f08892bb20c59b21bfe15a6647.png

if you take your analog meter and set it to the very lowest or most sensitive scale. Typically they'll either be the lowest voltage or the lowest micro amp and sometimes they'll be the same thing. Then with her probes like the image shows you hold the problems where the coil is and you wait. Ill have to wait at least 20 seconds and each time it steps if the circuit is working it will cause the needle to go in one direction than the next step will cause the needle to go in another direction. If that is occurring the circuit is working.

image.png.62fb4ae926a09308354c5e66810667ce.png

 

820p ebel cartier 81.pdf

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Marcelo Member

Marcelo

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Posted
2 hours ago, JohnR725 said:

your video shows something very bizarre like what exactly are you trying to do? Are you trying to measure the resistance of an integrated circuit?

I think I've seen this video before somebody else might have found it? Well I really can't say anything nice I definitely would not follow the testing procedure as it's a waste of time. a more appropriate test beautiful with the manufacturer recommends as opposed to this.

it would help if you have the service guide I've attached. if you had all these quartz test equipment we could check for things like is the quartz crystal oscillating or we could measure current consumption but you lack all of them.

We know from the service guy that this watch steps every 20 seconds. We also lack a lot of test points but you can't get to where the coil is in other words to test points in the power going to the coil as shown in the image I found online.

image.png.75d7b2f08892bb20c59b21bfe15a6647.png

if you take your analog meter and set it to the very lowest or most sensitive scale. Typically they'll either be the lowest voltage or the lowest micro amp and sometimes they'll be the same thing. Then with her probes like the image shows you hold the problems where the coil is and you wait. Ill have to wait at least 20 seconds and each time it steps if the circuit is working it will cause the needle to go in one direction than the next step will cause the needle to go in another direction. If that is occurring the circuit is working.

image.png.62fb4ae926a09308354c5e66810667ce.png

 

820p ebel cartier 81.pdf 195.25 kB · 4 downloads

I was trying to test the pulse of the IC and also wants to know if this method can works.
I tried your method in uA and works fine, 10 in 10 seconds pulse to one side and another side. Really thank you John, i think the board is fine.

God bless you.

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