Voltage readings on Galaxy are now OK, so the next question!

[Strangeways]

Great to hear it is working now - but those BRs need to replaced. 6A is too low. Original were 8 Amp - but I replace them with the 35 Amp 400 V BRs from our sponsors.

 

[braddo]

OK back for more.

All the lamps (including G.I) are drawing DOUBLE the current that they should be. Voltages are fine though. At the moment the 2 lamp fuses on the power board are removed cause they'll blow so I have no lighting. Where do I look from here? The tranistors on the lamp board in the backbox are pretty corroded, I've got to check/replace them. Would that be where to start?? Thanks guys.

[braddo]

Alright i'll have to reply to my own question, not sure if i'm making sense but lamp fuses on the power board are blowing, so i'm going to the lamp board in the backcox to do some checking, and i'll replace the stuffed transistors, i'm thinking there will be a few of them. I can't think of anywhere else to go right now. I'll fill ya's in when i'm done.

I can play the machine without lighting ATM but it isn't so much fun.

[Strangeways]

OK - I''ll bite !

TP4 is 7.3VAC for GI - F5 (20Amp) - Yellow/Blue Wire directly off the Transformer Playfield, Backbox and Cabinet

TP1 is 5.4VDC for Feature Lamps F1 (10 Amp) - Blue wire from BR1 & R2 (25 Ohms) - Playfield & Backbox

Two different circuits, two different voltages (AC and DC)

You have a short somewhere in your wiring loom I suspect, and you need to isolate where the short might be.

Process of elimination - and I assume the machine just sits there and blows a fuse;

Try just the fuse for F5 without F1 - Does it blow ?

Try just the fuse for F1 without F5 - Does it blow ?

this will isolate which circuit we should be looking for - AC or DC ?

[braddo]

Firstly I have to say thanks to Nino and everyone else who answers my questions.

I'll try cut down on questions in the future I don't like to 'use' people's knowledge, if you know what I mean. This site has been a huge help to me.

Both fuses still blow even trying one at a time, so, disabled the G.I, and now the attract/playfield lights are BRIGHT, clear, and fully working .
Run the test and everything except G.I. is working fine.

Now checking for a short in the G.I. chain. Hopefully I can avoid having to check boards in the backbox, see how we go.

Thanks again.

[Strangeways]

Ask questions - Others that may experience similar issues will be able to follow the same process.

GI leaves the Power Supply board on all three connectors - Playfield, Headbox and Cabinet. There is also a relay on the power supply section that flickers the GI during attract mode and once the word "GALAXY" is completed.

So it could be the door lamp sockets, a playfield short or a shorted socket in the headbox.

question - Does the GI fuse blow when not playing a game ?

Simple isolation - If it is blowing, isolate by removing J1 (playfield) - then see if it blows the GI Fuse..

Remove the GI relay etc etc..