which wire is what ?

[RICHE100]

got a midway space invaders upright , i want to put a different chassis and moniter in it .

i know what the feeds are for the video red/wht and blu/wht .. but what is + and - on the same molex connector ??

and whats the left over wire ?



and the new moniter has this jap or usa plug on it , so i will need to snip it and connect it to the wires that you tell me are + and - ..



how do i tell on the jap/usa plug whats + and - ? as they goto a little board thats marked ac1 and ac2 ?



please help im keen to try it

richard

 

[Purity]

Have you looked at the wiring diagrams for both the SI and the monitor?

 

[RICHE100]

i dont know how to read a wiring diagram .. ive got a standard midway space invaders machine

and i dont have on for the moniter/chassis ?

it should be simple as moniter has a plug ... and cab has its molex that went into the old wells chassis

just need to know which wires and what

 

[Purity]

just need to know which wires and what

and that's why I suggested the wiring diagrams

What's the chassis model?

 

[Judder]

If the monitor has a US plug on it it's probably designed to run at 110V which means you'll need a step-down converter to run it from UK 240V rather than just changing the plug.

However, if the monitor can run at both 110V and 240V, then the monitor power is A/C so when you cut the plug-off you will see that there should be a White wire (Neutral) and a Black wire (Live).

US plugs don't as standard use an earth, so on a UK plug you would connect white to Neutral (on the left from the top, normally the blue wire) and Black to Live (on the right connected to the main fuse of the UK plug, normally the brown wire).

I did this on my US Williams Defender as I converted the US 110V power supply to 240V as it had the ability to do this using Jumpers and then added a UK monitor.

I would suggest though you post up the make and model of the monitor before doing any of the above so that everyone can see if it can support both voltages or not - wouldn't want to have things blowing up otherwise!!

Reference: http://www.leadsdirect.co.uk/technical/americanplugwiring.html

 

[RICHE100]

the moniter came from a duke of lancaster cab . i didnt buy the cab , but was gifted the moniter by a good friend . the machine was called intruders ..

the machine isnt this but looks like this :

http://api.ning.com/files/HAQvmkWZXJ5wviAhhDuDu6GU5zXNzzqDNnchfAuRQY5Evtvy7*PZKo2tQPKtV3EPUkRfVXA3FvXX6pMjt8INZopRgsddD3Us/officearcademachines009.JPG

 

[bbz149]

 

[RICHE100]

anyone help me further atall please? here are pictures of the chassis and the plug it has on it in detail :


















please help

RICHE1002013-03-08 14:51:55

 

[RICHE100]

further update , thought id check cont of the 3 wires from midway cabinet to see which one was earth

however the meter finds all the pins goto earth with the machine off ??

also checking earth at the plug end all wires bleep on the cont setting in turn with the green earth of the plug ?

i swop and check it on the brown and blue wires of the plug and each colour bleeps ??? and in some cases it then trips my house out ?

wtf ?

do i need the machine on and the pcb in for such checks ?

 

[Judder]

got a midway space invaders upright , i want to put a different chassis and moniter in it .

i know what the feeds are for the video red/wht and blu/wht .. but what is + and - on the same molex connector ??

and whats the left over wire ?

Have a look at the monitor schematic here

http://www.classicgaming.cc/classics/spaceinvaders/techinfo/midwaymonitor_schematic.gif

Pin 7 of the Molex connector is Green and labelled common with a ground symbol on it

Pin 9 of the Molex connector is White (Purple in your case) and appears to provide 110V / 230V depending on the setting of switch SW1

Pin 10 of the Molex connector is Black (Blue in your case) and appears to provide 110V / 230V depending on the setting of switch SW1

Pin 1 and Pin 2 of the Molex connector are labelled as Video Input

Please get someone with their own Space Invaders to verify the above - i'm just interpreting the schematic and don't have one here to test - especially as your playing with high voltages here!

So, in theory, the wires from the power to the replacement monitor would connect to pin 9 and Pin 10 but please get some more of the members on here to verify this before doing it!!,

More references here

http://www.classicgaming.cc/classics/spaceinvaders/techinfo.php

 

[RICHE100]

thanks judder i will hang fire and see if anyone else advises

thanks for reading and follwing the schmatic for me .

 

[RICHE100]

update

after cutting and snipping and joining i have this :



have i put the tube in the wrong way up ? do i need to rotate tube? or do summut else ?



rich

 

[RaveN]

Yeah, it's upside down, easiest way is to physically turn the whole thing round, otherwise you'll have to swap the wires on the coil. Plus the screen/brightness knob needs turning right down.
Glad to see you got it working!

 

[stevebm1]

well done mate,you got it going

 

[RICHE100]

i give up ... ive broken it ..

managed to bugger it ?

all i did was
unsolder 2 solid wires that were on the coil and put spade connectors on , and now all i get
is a horizonal small line across middle if screen .

friggin fantastic

i should have left alone

 

[smarty]

I can't see your photos above at the mo, but are your spade connectors definitely crimped onto the conductor of the cable and not the plastic insulator?

Have you tried putting the wires back in their original positions?

smarty2013-03-09 18:20:28

 

[RICHE100]

somepme said ive now blew a line or summut

as ive stuck volts down the wrong line and it will automatically blow it .

nevermind you live and learn , im certainly learning .

all that work and trouble ..

 

[PaulSwan]

The purist in me winced when "cutting and snipping" was mentioned. What you really mean to say is "I bought a Molex connector and made a monitor adaptor" for my cab
Paul.

 

[RICHE100]

dont worry no midway space invader wires have been harmed or altered . haha you can rest easy

i have blown the line though but swopping the wrong wire on the coil ..

i should have left alone just turned moniter manually and peeled off the top acetate off the screen

oh well . ive now got 2 tubes and i can use and 2 broken chassis ..

hoping someone can fix chassis for me ?

rich

 

[saleem]

The purist in me winced when "cutting and snipping" was mentioned. What you really mean to say is "I bought a Molex connector and made a monitor adaptor" for my cab
Paul.

No
What he meant to say was he took a jimmy to it while he was stood in a bucket of water.