Please Help me: Microma solid state

[simone]

Ciao a tutti....I have found in a watch store this Microma solid state model HL20 (circa 1975).The watch is NOS with tag (225.000 lire,actual 110 euro).
As you can see the lcd panel is defective....damn
Probably a common problem with this panel soldered directly to the board...The module seems to be working (the lights work) 'cause i can see the flashing dot seconds in the display....
I want to restore this beautiful piece of history.
Please help me...thanks in advance....

IMG_1332.JPG

[BENRUS]

Nice watch!
Its a tough module to find.
I've been looking for one, and I think Kasper was too? ( viewtopic.php?f=58&t=6037 )
Here's the topic of the "Solid State" I just had fixed, and now needs a new module ...AGAIN : viewtopic.php?f=67&t=5752&p=37087#p37087
My watch now has a metalic stuck image of 9:11 , without battery installed.

911.JPG

911 EMEGENCY! We need some MICROMA modules!
I think I'm done with my Micromas for a moment, and am not worried about fixing them any time soon.
Best of luck with your repair

[simone]

Thanks Benrus...I'll ask to Kasper and Adam....finger crossed...
It's a nice watch in NOS conditions and i want to fix it....i have also a second microma with the same problem....damn lcd panel!!!
Lcd panel broken and module ok...

[simone]

Nothing to do...this module seems to be hard to find....or impossible...
There's a way to fix the lcd panel by pressing on it?
When i bought this watch the lcd panel was blank but when i put the battery in,the lcd starts to show some digits but with a big spot of liquid in the middle of the panel.
This spot sometimes is small (so i can see the number) and sometimes fill the entire lcd panel .... i don't know why!

[simone]

Now no digits appear....mah

[Seiko&Casio Lcd's]

Nothing to do...this module seems to be hard to find....or impossible...
There's a way to fix the lcd panel by pressing on it?
When i bought this watch the lcd panel was blank but when i put the battery in,the lcd starts to show some digits but with a big spot of liquid in the middle of the panel.
This spot sometimes is small (so i can see the number) and sometimes fill the entire lcd panel .... i don't know why!

Read this.
viewtopic.php?f=58&t=6042

Maybe it's the same problem, and you have to leave the battery in it for a long time ?

[simone]

Thanks for the tips...i have noted that if i leave the watch out in my balcony with an external temperature of 10 C the spot decreases (no digits again) but in my home with 23 C the spot increase....
Anyone know how it happens?

[Seiko&Casio Lcd's]

I noticed with the commodore module (link in my previous post) ,that the screen is blank without a battery, and when the battery is inserted you get the stange bleed on the panel.
On your watch the bleed is there, even when the battery is not installed, I'm afraid that is not repairable, and you have to search for another lcd panel ,sorry for the bad news
And the digits don't appear at all anymore ,but it did before ? . you did clean the insides of the module ?

[simone]

And the digits don't appear at all anymore ,but it did before ? . you did clean the insides of the module ?

Yes,before some digits appear,with a spot in the middle but now nothing....the module is nos and is very clean...
Only the light works well,very strong....

[simone]

Why with low temperature the spot decrease?This Microma make me crazy...!!!

[retrowrist]

Why with low temperature the spot decrease?This Microma make me crazy...!!!

It is not unusual to have the ink blot spot increase in size when the temperature rises. Is is simply expansion. The LCD panel has become contaminated. If the LCD panel is glued or soldiered to the IC, then you need a new module...that's all.