Double Dragon 3 - The Rosetta Stone - Arcade PCB Repair

In this vid we are trying to fix a Double Dragon 3 PCB that suffers from certain graphical errors. On certain graphics colors appear to be wrong and some appear just black. At first a problem with one of the graphics eproms comes to mind but it turns out to be another issue. Enjoy!

[@nicolaslacoste9367]

As usual, a very good video. Carry on like this, it's just perfect

[@WILDGEESE399]

Those custom chips are a pain in the ____ good vid though

[@azariayehezkel9064]

Hi doktorzett
Merry Christmas for you and yours family
Happy new year

[@christophzett]

Thank you very much!!! Merry Christ,mas and a happy new year to you, too!!!

[@wm437]

Very nice work, great video. You are very knowledgeable.

[@christophzett]

Thanks! Glad you liked the video!

[@christophzett]

Thank you! Compliments are appreciated! ;-)

[@diemaschinedieviereckigeei2941]

Hi Dr. Z, when you turn on the board at 25:55, you do so by plugging a cable in a home-built switchboard (plugged in your power strip), which has connectors so you can individually wire L and N and also has a tap for PE and which at its back connects to the power supply of the board. What is the benefit of this setup, compared to a simple DPST switch, for example? Do you use it to connect something in series?
Keep up the good work, your channel is great!

[@christophzett]

Yes very good guess! I build this a while ago when I wanted to measure power consumption of an electric device. This open wired power source lets me connect an ampere-meter in series to the unit under test. Besides I use the tap for protective earth to discharge crt tubes.
Thank you for your compliment, enjoy the vids, any questions just post them!!! ;-)

[@sensemusicofficial]

if i can see correctly you have bridged some chip legs .. from the reflowing

[@azariayehezkel9064]

We see you soon?
Where are you

[@azariayehezkel9064]

We wil see you in the future ?

[@keeper7keys2003]

25:59 I shouted out a swear word! 😱
😂

[@christophzett]

That is appropriate. ;-)

[@MrVaporeso]

I laugh to death on 26:02 :D :D :D

[@azariayehezkel9064]

:-)
I all ready subscription

[@christophzett]

Thanks you for subscribing!!!

[@kcase601]

What are you using to see the surface mount ic pins close up?

[@lustfulvengance]

Kevin Case Microscope

[@christophzett]

I have a regular binocular microscope with 10 times magnification and I am just holding the camera at the eyepiece... so the picture is a bit unstable unfortunately. I use that microscope a lot - I usually solder under the microscope.