Really well explained. I really hoped for a better outcome as I have a classic H239 with burn. Also remember talking to you about this on a 0634 about a year ago. Keep up the good work content like this is invaluable. Now then I really need to go buy that book!
Very interesting Tibi! I have the same book also. And yes newton ring unfortunatly is unrepairable issue (lcd itself). Replacing front and back is the only solution with faint digits or reddish-green-purple display.
Great explanation. Never knew how an lcd worked before, but now I do. Thank you! As a quick follow-up question, if you're separate the panes containing the LC, replaced the LC and reassembled it (assuming this is possible) would that resolve the issue?
@@VintageDigitalWatches Ok, I have a follow-up question then. Can one buy LC liquid and is it possible to open the display and replace it? I don't know how LC liquid works, but would it be standardized? Or do different manufacturers use different liquids that require different amounts of current? EDIT: I should say thank you for your videos. Also, why have you not set up a patreon account? Your videos are mzing, but more importantly they cover a subject that is difficult to find information on elsewhere. I'm not rich, but I'd contribute.
@@stianlarsson6625 i would do the same fix of you, but is difficult find liquid cristal......and when find it you think need only put liquid crystal between the two glass?
could you please provide us a working link for buying polarized films? Ebay has many films but I cannot see any for vintage watches, but only for mobile phones...thx!!
Hi!, very nice video. My watch a Citizen Crystron 1975, is ok when in shadow, if i exposed to sun, or a phone led light it turns black, and purple for some minutes, in the most part of the screen, then back to normal. what can be the cause? thanks for your opinion.!!
I thanks for your great job. I'm tryng to fix a Seiko a156. I cleaned everything inside the model. Put a normal battery lr1130. It starts after some minute in crono mode but if i push any button display turns off. After a while it turns on again
Screen burn is a common problem on handheld consumerism like the gameboy and it is usually the polarizing filter at fault! I don't know why it is different in watches!
I'd like to know if you also observed an uneven distribution of contrast across a LCD that shows the rainbow effect. My Casio W-780 seems to have the effect you describe here, but it also has a very uneven contrast that also changes depending on what is displayed. Changing the front polarizer didn't do anything. I don't dare to remove the back polarizer, fearing to lose the "REM" print on the back of the glass. So I can't test if the back polarizer is the culprit. But if I put the module in test mode, where all segemts are lit, it suddenly has the full contrast in all segments. I have no clue what causes this strange behavior.
Never saw a case where the contrast is uneven and also at times comes back ok. I think it has to do with the module. Do you have a second module on which to test this LCD?
Hi Tibi , nice video and well explained . I have many watches with dots bleeds and rainbow . Months ago i remove the polarizing film from a beautifull ciizen who as black screen , now i just looking for polarized film on ebay but only found for cell phones so is the same thing ? Can i use any polarized film for lcd screen and the front and the back are the same? Also there is no info if is self adhesive . Thank you
You can try to look for a Gameboy polarizer on ebay. Many Gameboy owners want to put a backlight in the display to enhance visibility and contrast, and for that purpose there are many offers on ebay, selling full backlight kits or just the polarizers. They come in square pieces of 50x50 mm and are usually self-adhesive. I think polarizers with a stripe running across the protecting foil have an adhesive side.
Hi sorry for my english, i have a citizen aqualand first series , i ask you if is possible replace liquid crystal between two glass for fix it , i dissasemlby two glass, front and black but now i dnt know how put back liquidi crystal between two glass? thank in advance for your help ;-)
@@VintageDigitalWatches that's sad... I already had two digital vintage watches, and both of them had the LCD damaged by water... so, I was expecting if I can just replace the LCD which exactly looked like in the video. The electronics part is still good and functional and I want to still make use of it.
@@VintageDigitalWatches Interestingly enough, after watching your video, I decided to put my non functioning Seiko in the freezer. It has come back to life!
@@bobsmithinson2050 The display was not visible unless frozen - so assuming that is a display/leaked issue. My watch is still the freezer where it works! When it warms up the display fades away again.
@@jaitchy thanks. 😭 I’m guessing it leaked some, and when cold, the remaining glass panes get closer together when cold, allowing the remaining liquid to be activated. Go move to Alaska or something and you can wear your watch most of the time haha
Hi bro greetings from Chile, I have a casio game called hungry girafe, it's a game from 1985 It have a issue with the lcd screen about missing sprites, the rest of the display is ok but, I can't see the leaf sprites. Is the only problem, do you have a method to fix it??, or is a circuit issue. I put the tester probe one on one contact line and appears the missing sprites
Hmm, have a look and see if any other metallic parts of the module are touching the Piezo part, only the piezo spring should, if there is any other part touching that then it will go quiet.
@@VintageDigitalWatches Thank you very much I tried but it all looks ok in there. Perhaps it has just failed over time. It's a d288 if you're interested. You got me looking at these again, Cheers
Is there a way to test the piezo caseback while not connected to the watch. Positive to the crystal and negative to the case-surround? But how much voltage? Many thanks again for any info
Most interesting and well explained. Thanks for posting.
Wow such a simple explanation for something I've always wondered about!!!
I learned so much in a short time, thank you
Really well explained. I really hoped for a better outcome as I have a classic H239 with burn. Also remember talking to you about this on a 0634 about a year ago.
Keep up the good work content like this is invaluable.
Now then I really need to go buy that book!
:) Yes, Louis Zannoni's book is a wealth of information and it has a big chapter on LED's as well.
Very interesting Tibi! I have the same book also. And yes newton ring unfortunatly is unrepairable issue (lcd itself). Replacing front and back is the only solution with faint digits or reddish-green-purple display.
...and now I have it on video :) :)
Great explanation. Never knew how an lcd worked before, but now I do. Thank you!
As a quick follow-up question, if you're separate the panes containing the LC, replaced the LC and reassembled it (assuming this is possible) would that resolve the issue?
Hi, yes, I think it would, that is the last place the issue can come from.
@@VintageDigitalWatches Ok, I have a follow-up question then. Can one buy LC liquid and is it possible to open the display and replace it?
I don't know how LC liquid works, but would it be standardized? Or do different manufacturers use different liquids that require different amounts of current?
EDIT: I should say thank you for your videos.
Also, why have you not set up a patreon account? Your videos are mzing, but more importantly they cover a subject that is difficult to find information on elsewhere. I'm not rich, but I'd contribute.
@@stianlarsson6625 i would do the same fix of you, but is difficult find liquid cristal......and when find it you think need only put liquid crystal between the two glass?
You did not finished and repaired? You said start from scratch? I did not understand!
thankyou very much... you cleared my doubt.... 😊👍🙏
could you please provide us a working link for buying polarized films? Ebay has many films but I cannot see any for vintage watches, but only for mobile phones...thx!!
Hi!, very nice video. My watch a Citizen Crystron 1975, is ok when in shadow, if i exposed to sun, or a phone led light it turns black, and purple for some minutes, in the most part of the screen, then back to normal. what can be the cause? thanks for your opinion.!!
Nice explanation sir, if you please, how do I get the liquid crystal used in this screen
I thanks for your great job. I'm tryng to fix a Seiko a156. I cleaned everything inside the model. Put a normal battery lr1130. It starts after some minute in crono mode but if i push any button display turns off. After a while it turns on again
Screen burn is a common problem on handheld consumerism like the gameboy and it is usually the polarizing filter at fault! I don't know why it is different in watches!
There are bur s in watches but not so often. Aging pf the liquid crystal I suppose is the issue here I believe.
Is the repair manual worth buying? I have some older watches that I want to repair
Thanks
I'd like to know if you also observed an uneven distribution of contrast across a LCD that shows the rainbow effect. My Casio W-780 seems to have the effect you describe here, but it also has a very uneven contrast that also changes depending on what is displayed. Changing the front polarizer didn't do anything. I don't dare to remove the back polarizer, fearing to lose the "REM" print on the back of the glass. So I can't test if the back polarizer is the culprit. But if I put the module in test mode, where all segemts are lit, it suddenly has the full contrast in all segments. I have no clue what causes this strange behavior.
Never saw a case where the contrast is uneven and also at times comes back ok. I think it has to do with the module. Do you have a second module on which to test this LCD?
I didn’t understand anything you said but maybe you should make a video on it
Hi Tibi , nice video and well explained . I have many watches with dots bleeds and rainbow . Months ago i remove the polarizing film from a beautifull ciizen who as black screen , now i just looking for polarized film on ebay but only found for cell phones so is
the same thing ? Can i use any polarized film for lcd screen and the front and the back are the same? Also there is no info if is self adhesive .
Thank you
www.ebay.co.uk/itm/Polarized-Film-faded-digit-Negative-Display-mod-with-adhesive-Spare-parts/323650226541?hash=item4b5b0e896d:g:U1wAAOSwiONYOMHQ:rk:1:pf:0
You can try to look for a Gameboy polarizer on ebay. Many Gameboy owners want to put a backlight in the display to enhance visibility and contrast, and for that purpose there are many offers on ebay, selling full backlight kits or just the polarizers. They come in square pieces of 50x50 mm and are usually self-adhesive. I think polarizers with a stripe running across the protecting foil have an adhesive side.
Hi sorry for my english, i have a citizen aqualand first series , i ask you if is possible replace liquid crystal between two glass for fix it , i dissasemlby two glass, front and black but now i dnt know how put back liquidi crystal between two glass? thank in advance for your help ;-)
thanks for your video..quick question. Why are some lcd's kinf of green effect? What's the difference to a normal lcd's?
Not sure what you mean by that, some are green and so.e are grey depending on the colour of the back reflector.
Is a new LCD commercially available?
No, only if you book a Chinese manufacturer to build one.
@@VintageDigitalWatches that's sad... I already had two digital vintage watches, and both of them had the LCD damaged by water... so, I was expecting if I can just replace the LCD which exactly looked like in the video. The electronics part is still good and functional and I want to still make use of it.
I am pretty sure the rainbow non working screen on my 80s Seiko G757 has leaked. Does the LC liquid smell like vinegar?
Never smelled it :)
@@VintageDigitalWatches Interestingly enough, after watching your video, I decided to put my non functioning Seiko in the freezer. It has come back to life!
@@jaitchy can you elaborate on this further please? What wasn’t working? The display itself or the whole module!
@@bobsmithinson2050 The display was not visible unless frozen - so assuming that is a display/leaked issue. My watch is still the freezer where it works! When it warms up the display fades away again.
@@jaitchy thanks. 😭 I’m guessing it leaked some, and when cold, the remaining glass panes get closer together when cold, allowing the remaining liquid to be activated. Go move to Alaska or something and you can wear your watch most of the time haha
Hi bro greetings from Chile, I have a casio game called hungry girafe, it's a game from 1985
It have a issue with the lcd screen about missing sprites, the rest of the display is ok but, I can't see the leaf sprites.
Is the only problem, do you have a method to fix it??, or is a circuit issue.
I put the tester probe one on one contact line and appears the missing sprites
Tot test the board for missing output on segments you need an oscilloscope.
Could we fill the liquids to the lcd when liquid is vapourized and how
You would need specialist tools, and a laboratory.
Any tips on how to fix the piezo chime on my citizen digital caseback, it's gone very quiet
Hmm, have a look and see if any other metallic parts of the module are touching the Piezo part, only the piezo spring should, if there is any other part touching that then it will go quiet.
@@VintageDigitalWatches Thank you very much I tried but it all looks ok in there. Perhaps it has just failed over time. It's a d288 if you're interested. You got me looking at these again, Cheers
Is there a way to test the piezo caseback while not connected to the watch. Positive to the crystal and negative to the case-surround? But how much voltage? Many thanks again for any info
@@hamishspencer You will need an oscillating voltage to make the buzzer work, it is not applying simple
voltage.
@@VintageDigitalWatches Thank you again. Oh well, looks like I will have to live without the chime. Still a great watch.
Good try anyway ! At least we learn we couln’t !
Yeah I was a little disappointed too, I was 50 50 on the odds of success but bummer