Subzero79's build

TF530 - 63030 + RAM Board

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Subzero79
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Joined: Wed Sep 25, 2019 8:57 pm

Subzero79's build

Post by Subzero79 »

20190925_223349.jpg
20190925_223349.jpg (122.61 KiB) Viewed 5732 times
Kickstart give me expansion 1 error
But when I go to test memory with diagram memory seems ok
20190925_211650.jpg
20190925_211650.jpg (143.81 KiB) Viewed 5732 times
What I have to control resolder?
terriblefire
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Re: Subzero79's build

Post by terriblefire »

This will be bad solder joints on the address pins at the RAM. DiagROM doesnt check for address errors.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Subzero79
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Re: Subzero79's build

Post by Subzero79 »

Reflow cpld and rams nothing changed
I will try with another firmware
terriblefire
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Re: Subzero79's build

Post by terriblefire »

The RAM has an error. It’s not firmware. That error you see is 100% the answer. An address pin is not soldered down properly and is probably not even making contact with the board.

Why don’t you find out what the issue is instead of changing things randomly in hope?

Use DiagROM to find repetitive data patterns using the memory editor.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
PaulJ_2.0
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Re: Subzero79's build

Post by PaulJ_2.0 »

I concur, it will be a loose ram pin.
Check them properly.
Subzero79
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Re: Subzero79's build

Post by Subzero79 »

Ok I will measure every pin for continuity with my multimeter

Thanks a lot guys
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PhilC
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Re: Subzero79's build

Post by PhilC »

Subzero79 wrote: Wed Sep 25, 2019 10:30 pm Ok I will measure every pin for continuity with my multimeter

Thanks a lot guys
Another suggestion, as your meter may indicate that there is good continuity with a loose pin that is resting on the pad.

If you have a microscope then view each pin whilst trying to gently jiggle it. You might be surprised how many are loose or bridged that you cant see with just a magnified.
If it ain't broke, test it to Destruction.
Subzero79
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Joined: Wed Sep 25, 2019 8:57 pm

Re: Subzero79's build

Post by Subzero79 »

I don't have a microscope,it was bad contact with socket
terriblefire
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Re: Subzero79's build

Post by terriblefire »

These boards are a nightmare to debug without a microscope.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
Subzero79
Posts: 73
Joined: Wed Sep 25, 2019 8:57 pm

Re: Subzero79's build

Post by Subzero79 »

found my old stereoscopic microscope with a fine insulin needle checked all connections beetween memory and pcb plus cpld and pcb
all conections is solid soldered no one pin moves when i poke with needle.i think the problemm is my socket i need to replace and use a riser because some lines i think no do good contact a6 a5 d2 d3
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