Space Invaders Issue

[thetopcat]

Hi All

I'm new in this forum: I'be bought a Space Invaders and I need your help for solving an issue.

Game switches on correctly but If I try to load credit (touching directly metal lever on the coin meter), but it doesn't work.
I checked with my DMM the voltage of the two wires (measured between each wire and ground) connected to the coin switch: 0V (DC).

How is the correct voltage I have to see here?
I have electric diagram of CPU board, but I don't see "TP"s (check point) voltage, and also supply voltage on CPU board connectors.

Any help would be appreciated.

Thanks in advance!

[ckong]

Hi, welcome here.

I woulf first check the contimuity in the wiring from the coin switch to the board.

[Luigi]

Like Erik said, check the wiring. Switch your multimeter to OHM, it should say 0 (zero).

Oh, it's OK when you don't have no voltage there....coin inputs (and other controls like buttons and sticks) are switched to GND, when pressed



Did you get the cab with this bug or did it work and that bug occured just now?

[thetopcat]

Hi

Thanks first for your fast reply!

Yes, I get the cab with this bug.

I'll try to check wires continuity.

Thanks a lot!

[baritonomarchetto]

You should measure, relative to the signal ground, 5V when the switch of the coin door is open, 0V when closed  

[Luigi]

You should measure, relative to the signal ground, 5V when the switch of the coin door is open, 0V when closed  

Really?? Can someone confirm that?

@thetopcat: what Space Invaders do you have?

This one?

[Belike]

Frederico, you forgot to inform us that you have a Zacc The Invaders.
That is completely different from the Midway bootleg.
I have the same problem when I got my mine, I think I know what to do in this case, please send us a pic from the pcb CONNECTED to your cab, I think you plugged the connectors in the wrong way.

[thetopcat]

Hi Luigi

I'm apologize to you.

Yes, I have a Zacc The Invaders.

Federico is going to take some photos.

Thanks for your cooperations

[Etienne MacGyver]

the Midway bootleg.

LOL !
I like it Bela ! 

[level42]

Was the Zacc actually licensed or boot ?

[Belike]

Was the Zacc actually licensed or boot ?

I guess it was a bootleg, there are absolutely no Zaccaria signs inside or on the artworks.

[thetopcat]

Unfortunately the game does not work yet, yesterday I made ​​many tests and I was able to run the credits, now seems to not load the game,  it seems that the bottom of the screen there is a line of color green must be completed to the end before you start the game sometimes does not load sometimes loads very slowly.....

[Luigi]

Unfortunately the game does not work yet, yesterday I made ​​many tests and I was able to run the credits, now seems to not load the game,  it seems that the bottom of the screen there is a line of color green must be completed to the end before you start the game sometimes does not load sometimes loads very slowly.....

I'm confused.....your original post made me think the game is running but you can not "insert coins" 

[ckong]

pictures or a youtube movie say more than thousands words ....

[thetopcat]

sorry sorry, I can not put videos in the forum, if you give me an email I send you the video and some photos, videos you saw yesterday on all the ships, after checking the credits yesterday, but the coin works on display do not see the ships.

add yesterday photo