Hello Pinheads!
i just got my hands on JM - it looks like a lot of fun but unfortunately is not working well..
First things first after turning on the pin - DMD shows NOTHING. DMD is ok I have checked it in another pin. Different DMD also not showing a damn thing. Ribbon cable to dmd (the one from the driver board) exchanged and still nothing. what could be the case?
I can hear that the ERROR report wants to tell me something but as DMD wont cooperate - I don't know if it's showing DMD error OR - HAND error - which is 2nd issue - after power on - hand tries to move right but after 1-2 mm it stops and "returns" - and repeats this procedure 6-7 times and then she gives up. where to start?
I don't know if it has any connection with the above issues but start button, the one below start, and launch are not blinking - I havent checked the bulbs yet but maybe it is also causing the dmd and hand not to work properly?
thank you for all the help

thanks, how can i check if this solves the problem? (if you have the time and patience to explain it to a noob i have the dmm of course but I lack education in electronic department BUT i have dissasebled 3 pins before, repaired POA in Indy, Battlefield in Shadow etc.. I'm a fast learner just need to have "instructions for dummies" can I check the HV on the board with DMM? maybe one of transistors or capacitors is dead?

well too much soldering I think, if there is no option to locate the faulty cap/tansistor I wont be exchanging all of them.. I will check the HV as per the instruction given above and I will order the replacement... but I cannot find it in Europe @ a reasonable price

VAT is 23%, customs should not be added due to low amount but transport to my country will increase the price much I think.

ok so what about the bulbs? fuse or sth else?

I enclose some pictures of the dmd hv board - any suspicious looking elements?
Also pic of my dmd - can you tell me how I should set it to test dmd power? Sorry noob question.

Here's the situation on hand how it looks after turning on the pin

And a pic of a loose plug near the coin door - it should be like this?

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But pinballlife doesn't have my country for shipping I cannot find this board anywhere for similar money

Well that is an option if you would be so kind. but I found it in Europe:
http://www.pindorabox.com/zaza-dmd-power-supply-board.html
WPC89/WPC95 option would be ok for Johnny?

I know that JM is WPC-S.. but that is closest board I found
I asked them, i hope they are not having fun with coronavirus and they reply. if it is not ok for JM then I must order from US - how much would it cost to ship it to Poland?

they replied that it should work. ordered already.
hope that fixes the blank dmd then I need to take care of the hand.

thanks for now for help! of course I will be back when I install this board and have some questions regarding hand assy.

Ok so I was trying different combinations and other dmds werent working with the dmd board from JM. Only other dmd working is Vishay dmd from my another pin. It has slighly different voltages than the one from JM and is almost brand new so this one is working - so until I get the parts, I want to take care of the hand - and now as I can see errors I can think of something. So errors enclosed on pics. X axis can be rotated by hand BUT the Y axis requires at first much strength. Then it is moving lightly ( manually). But when I turn on the pin It moves back and the Y axis looks like it moved too far and is stuck. That's why it gives error? Please check the pics - should these parts be like this? Or is it a little bit bend? The Y axis can be somehow regulated to move lighter? Any suggestions?

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I will check it.. and end up probably with taking out whole assembly for cleaning
thnx

well I found out that you were right! due to the weight of the magnet, whole hand has tilted a little bit downwards on the right, going up on the left - therefore the switch wasn't pressed at all. I couldn't find the screw to straighten it up so I have bended a little bit the switch and moved manually the hand. SO - hand test still is failing BUT the hand is working during the game. It is a a little bit wobbly but I will work on that. Once again big props and much thanks as I am happy as hell now it is a lightning fast game and I am already starting to love it. I wait for leds, playfield protector and dmd HV board and I will break some records

I will have to cheat a little bit and change the time because If i launch pin at midnight, I PERSONALLY will have midnight madness
thanks again for help! priceless !

Arrived. Mounted. Works like new. Thank you for help

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