Help :: tadao yakuza OLED screen gone bad

Discussion in 'Digital Circuit Design' started by harley3, Oct 27, 2016.

  1. harley3

    Thread Starter New Member

    Oct 27, 2016
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    Hi everyone I'm hoping I can pick your brains and someone can shed some help on my situation
    I have an OLED screen/module that appears to have gone blank, how could I check this....
    some help in fixing or repairing this would be very much appreciated....thanks in advance

    here is a pic of the OLED screen/module and board... it plugs into a bigger board...
    there is nothing wrong with the board that it plugs into the module or screen is the problem

    pics below include when it worked lit up
    circuit of the back...and reference pic of actual size...
    can it be fixed .....o_O

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  2. harley3

    Thread Starter New Member

    Oct 27, 2016
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    wow...69 view, nothing nobody...:(
     
  3. Dodgydave

    AAC Fanatic!

    Jun 22, 2012
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    I take it that the blue led behind the lcd is not lit up?
     
  4. harley3

    Thread Starter New Member

    Oct 27, 2016
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    i don't see no led anywhere around the board...that's just the color of the oled screen i take it ?
     
  5. takao21203

    AAC Fanatic!

    Apr 28, 2012
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    OLED has no led backlight.

    Try to check voltages on the pcb
     
  6. harley3

    Thread Starter New Member

    Oct 27, 2016
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    thats what i thought
    so how do i check the voltage on the pcb, ?
    the board runs off a 9volt battery, but im sure the screen gets much less
     
  7. takao21203

    AAC Fanatic!

    Apr 28, 2012
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    Well from what I know on the board you have a dcdc converter with a coil (the SOT23 device with 5 pins).
    Try to measure the voltage on its output capacitor.
     
  8. takao21203

    AAC Fanatic!

    Apr 28, 2012
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    Try lighter fluid on the small IC so you can see the type number clearly but guess its the 4.7uF on the left side
     
  9. harley3

    Thread Starter New Member

    Oct 27, 2016
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    first off thanks so much for your replies takao :cool:
    is there a PM option on this forum because i cant find it...?
    anyways i can see the numbers pretty clear and your correct its 4.7uf
    so how do i go about checking them with a meter i tried doing so before posting for help
    not sure why im getting no reading on any IC...or i don't have the meter set properly... ?
     
  10. takao21203

    AAC Fanatic!

    Apr 28, 2012
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    Do you power up the board? You should see voltage on some capacitors. I dont know the smaller ones maybe for the OLED itself. Its maybe broken and cheaper to get a new one, if you cant fix it in a simple way.

    But if you dont get voltage out from the IC this could have a few reasons, mainly this IC could be broken or no supply from the main circuit.
     
  11. harley3

    Thread Starter New Member

    Oct 27, 2016
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    unfortunately i cant get a new one the company no longer is in business tried that....:(
    that's why i joined here in hopes of a repair..if possible
    cant plug in the screen and check the power from the rear, ones plunged in i have no access to the IC...no space
    i did notice that when it is plugged in the screen even though its not working seems to generate some heat...o_O

    is there another way to check the resistance on the IC's...?
    here is what it looks like plugged into the main board

    [​IMG]
     
  12. takao21203

    AAC Fanatic!

    Apr 28, 2012
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    yes you need adapter wire with pins on one end, socket on the other, these are sold for Arduino

    Actually I have Y 3 way splitter PCBs 7 pin

    If you dont have one of these you can still handle the small board while on wires and check with DMM

    In the worst case you could temporarily solder wires between the display and main board
     
  13. harley3

    Thread Starter New Member

    Oct 27, 2016
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    ahhh ok i gotcha
    so after this hook up what do I look for when testing all the IC..?
    sorry im new to this lingual what is DMM...:confused:
    thanks for taking the time takao I do appreciate it...;)
     
  14. takao21203

    AAC Fanatic!

    Apr 28, 2012
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    Digital multimeter.

    Id check the output of the small IC and probably thats routed to the 4.7uF capacitor.

    Replacing the glass display is probably too difficult to solder for you, it is plugged into a socket or is the cable soldered on the PCB?

    Check the input voltage too, so it would be good if you can find the type number of the IC. If not you have to guess search for hints on the carrier PCB.
     
  15. takao21203

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    Something like this.
     
  16. harley3

    Thread Starter New Member

    Oct 27, 2016
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    yes i have a digital multi-meter....lol...DDM...:rolleyes:
    what do i set it to..?

    also to answer your other question yes the cable is soldered on to the PCB
     
  17. takao21203

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    Apr 28, 2012
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    to 20V range. Maybe you can find out if the glass is bad or just not powered
     
  18. harley3

    Thread Starter New Member

    Oct 27, 2016
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    it might be a bad glass ive read quite a few stores on another forum complaining about the same thing
    probably why the company went out of business these board were suppose to be lifetime warranty....:mad:
    i read even though they sat around unused when they were turned back on the screens were blank like mine..
    so something is going on ether with the screen itself or the module...
    here are some links if you care to read through them, also some guy out in Sweden i think he's in Sweden has some form of repair
    for these boards with a replacement screen/module...he has a facebook page i don't have face book nor will i get one...
    worst case scenario i might get someone i know to send him a message...one other thing the boards he fixes has a USB port to
    re-flash the board mine does not...


    http://www.pbnation.com/showthread.php?t=4269025
    http://www.pbnation.com/showthread.php?t=4784305
    http://www.pbnation.com/showthread.php?t=4502497
    https://www.facebook.com/TheSwedeTechnologies/
     
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