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I have a friend that has a S+ sit down. When he turns it on it does not power up at all. Was working but now nothing. I am guessing a power supply or blown fuse. What do you think? How many fuses are in a S+ sitdown and where are they located.

Your help appreciated.

Thanks,
Lonnie

Open the lid and look to the left, There should be a bank (3) of fuses on the top of the cage hat holds the mpu. The power supply is against the backwall next to the cage.

Lonnie-

To be clear, there is absolutely NO reaction whatsoever by the machine (zero lights, noises, displays, etc.)?

Is it plugged in? While you're checking the fuses, make sure that the computer style power cord coming from the wall is plugged firmly into the power supply inside the machine. It will look exactly like the rectangular plugs used on desktop PCs.

Yes, no reaction what so ever. I will have him check the plug and fuses. How can I test power supply?

Thanks,
Lonnie

In just a little over 3 years on this site, I don't ever recall a power supply going out on a S+. 

I agree, but I've also never heard of all three fuses burning out at the same time. :103-  Something's odd here.

I've actually had one finally die out...but that was at work
and they're on 24/7 in a "live" environment.
Turned out some of the windings gave out from corrosion.
I'm pretty sure it was a hurricane katrina PS.

OK    Mark   Stat and I talked about this very thing a few days ago, Is there a transformer inside the power supply box ????

It has windings in which you can easily jump it up to 240VAC.
If they short out, you can get a power supply with very weird power outputs
and it also overheated big time.
I wish I saved it to take some photos but it looked like something that was fried on a telephone pole!
All the fuses burned out and the cord melted which jumped the main breaker on the panel box on that row of machines.
I've only had 1 single PS do this but like I said - it was heavily corroded.
When I walked into the game room, all I could smell was that distinctive, burning smell... :98- :98- :98-
I must point out that I'm talking about an S+ upright power supply.
I've never seen the inside of a sit-down machine but I would imagine that they are the same?

Also make sure the power switch actually works and is connected.

to Buzz and Stat    yes there is a transformer in the power supply box. on S+ uprights it is in the back of the enclosed box. not much else in there, the in-line filter, the terminal blocks , the fuses, the aux. power outlet, the transformer, and the output connectors.

to check if your power cord, and in- line filter are good and its connections: plug a light of some type into the aux. power outlet, when plugged into the house outlet there is 115 vac there all the time regardless of the on/off switch.

if you have power there,then it goes thru your on/off switch, fuse F-3(6amp)  to the terminal blocks, and on to the primary of the transformer (step-down type). to see if power is getting to the switch and terminal blocks: your fluorescent lamps should be on.
up to this point, just by plugging in a lamp source, and observing if your fluorescent lamps are on, you have checked out half of your power supply.if either of the above actions don't occur STOP and you will have found the source of your problem.

If all is good, the last test is to check the denomination lamp (provided the bulb is good) and the reels. the lamp should be on, the reels are locked in place (not easy to rotate). this checks the output from the transformer, two remaining fuses, and the cable and connection to the motherboard.
Basically completing the test of the other half of your power supply.

From what I remember, the power supply box  is located behind the hopper and to the left. It has a metal cover made out of screen mesh (holes in it). you will see the aux. power outlet as well as the power cord plug. one screw to remove this so you could inspect underneath.CAUTION  unplug from house outlet when attempting to remove this cover.

Jim





 

Thanks guys I will help him check it out.

Lonnie

Jim, I always seem to be giving you K+s. :30- :72- :72- :72-

SF :31-