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crtfreak

Looking for help to diagnose a problem with 130XE

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Hopefully someone can give me some advice on diagnose a issue with my childhood 130XE

 

Its been sitting in storage at my parents house since the early 90's. I though it got tossed out years ago but when I was helping my mom put out Christmas decoration I found it in a box shoved in the top of the garage. I wasn't able to find the power supply for it just the system floppy drive and a few game carts.

 

I picked up a 65XE from MyAtari a couple years ago so I have the power supply that goes with it.

 

 

So my issue is the 130XE using the 65XE power supply will only show a blank blue or black screen when you first turn it on. If you let it sit for about a min and hit restart it will boot up perfectly to the prompt screen or boot a game cart. I can turn it off an on several times and it will work ever time. I can leave it off for about 30 mins and turn it on and it will work every time. But if I leave it off form a prolonged period of time say over night it will first boot back to the blue or black screen until I restart it after warming up a min.

 

I checked all the socket chips and they are all firmly in place.

 

Has anyone else experienced this issue or maybe know what I should be looking for.

Edited by crtfreak

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Hmm when its turned on longer it works sounds like solder issues.

Black screen mostly is rom or ram defective should just take a few minutes to resolder those joints

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I checked all the socket chips and they are all firmly in place.

 

"Firmly in place" doesn't always mean they have a good connection. Corrosion can build up over time between the pins and the sockets. I pop them out, shoot them (chip pins and sockets) with some contact cleaner, and pop them back into place.

 

Edit: Count yourself lucky if you have some socketed chips in a 130XE, because most don't.

Edited by MrFish
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Hmm when its turned on longer it works sounds like solder issues.

Black screen mostly is rom or ram defective should just take a few minutes to resolder those joints

 

 

 

"Firmly in place" doesn't always mean they have a good connection. Corrosion can build up over time between the pins and the sockets. I pop them out, shoot them (chip pins and sockets) with some contact cleaner, and pop them back into place.

 

Edit: Count yourself lucky if you have some socketed chips in a 130XE, because most don't.

 

Good point. I'll take them out and give them a good cleaning this weekend. I checked all the solder joints and they all looked good on the sockets

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give the whole board a look over both top and bottom.... and please put a meter on the power observing reading from cold to hot... fail to no fail...

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give the whole board a look over both top and bottom.... and please put a meter on the power observing reading from cold to hot... fail to no fail...

Are there any diagrams online that show pins and expected voltage on the socket chips that you know of ?

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I was mainly concerned with the power coming in as a whole... the rest is the standard power rail for the chips... I doubt the traces would have a break you wouldn't physically see and continuity testing would show breaks/resistance from trace/pad/ to a chips leg.... if it looks at all suspect just re-flow the joint...

 

of course if you had spare know solid power supply you could just swap that out to eliminate that possibility!

Edited by _The Doctor__

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I should start with ram and os best is desolder all and solder sockets in that case you can easy swap defective chips. I got a syscheck and that allowes me to test if all rsm is bad and rom the best diagnostic tool. For 99% of the systems I repaired had defective ram. Just 1 had a defective rom.

 

Sent from UMI hammer with Tapatalk

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The 65XE usually (always?) shipped with a 1 amp power supply, while the 130XE usually (always?) shipped with a 1.5 amp power supply.

If yours is a 1 amp, if I were you I'd get my hands on one of the XL/XE 1.5 amp supplies to see if that helps anything.

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The 65XE usually (always?) shipped with a 1 amp power supply, while the 130XE usually (always?) shipped with a 1.5 amp power supply.

 

If yours is a 1 amp, if I were you I'd get my hands on one of the XL/XE 1.5 amp supplies to see if that helps anything.

 

Maybe that is the issue. I looked an the 65XE supply I have is 1A. I looked on ebay for 1.5A but only MyAtari had them and they wanted a crazy amount after shipping. Is it safe to make my own? I have a few 5v 3A power supplies form a past project I did.

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If it's low ripple properly filtered and solidly close to the 5v... stay away from anything lower than 5 and nothing that is too far above either... shouldn't be a problem

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Are there any diagrams online that show pins and expected voltage on the socket chips that you know of ?

If this worked as I'm trying, it is two logic charts for all the 130XE LSI.

130XELOGIC.zip

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