Amiga 2000 Green Screen, nube help please - Page 3

KLund1 · 03 September 2019, 21:25

If the reading is higher then it would suggest a bad trace?

demolition · 03 September 2019, 22:08

Quote:

Originally Posted by KLund1

If the reading is higher then it would suggest a bad trace?

Yes, a higher value means that you are measuring through pull-up resistors, ICs or other components where the current can flow. If the schematic says that those points are directly connected, the resistance should be close to 0 ohms.

Vypr · 04 September 2019, 10:40

For these kind of checks you are better off getting a multimeter with a continuity test function rather than checking the resistance values. If you hear a tone when you probe the pins then you have a good connection. No tone due to a break or high resistance means no signal will get through.

KLund1 · 04 September 2019, 19:40

Thanks,
what multimeter would you suggest for vintage computer work?

Vypr · 04 September 2019, 21:32

Quote:

Originally Posted by KLund1

Thanks,
what multimeter would you suggest for vintage computer work?

Any would do, just check the feature includes continuity testing. I bought this cheap one and it has worked out well

https://www.amazon.co.uk/gp/product/...?ie=UTF8&psc=1

You could even get one that has autoranging for only a little bit more.

nogginthenog · 05 September 2019, 19:27

I bought a cheap Aneng autoranging meter from China and it's surprisingly good.

Irl · 07 September 2019, 21:13

Diagrom.com is not resolving properly today. I hope this is temporary, but if you need the latest stable ROM, it is on Internet Archive here:

https://web.archive.org/web/20190812...le/DiagROM.zip

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03 September 2019, 21:25	#41
KLund1 Registered User Join Date: Oct 2018 Location: Livermore CA Posts: 35	If the reading is higher then it would suggest a bad trace?

04 September 2019, 10:40	#43
Vypr Registered User Join Date: Dec 2016 Location: East Kilbride, Scotland Posts: 451	For these kind of checks you are better off getting a multimeter with a continuity test function rather than checking the resistance values. If you hear a tone when you probe the pins then you have a good connection. No tone due to a break or high resistance means no signal will get through.

04 September 2019, 19:40	#44
KLund1 Registered User Join Date: Oct 2018 Location: Livermore CA Posts: 35	Thanks, what multimeter would you suggest for vintage computer work?

05 September 2019, 19:27	#46
nogginthenog Amigan Join Date: Feb 2012 Location: London Posts: 1,309	I bought a cheap Aneng autoranging meter from China and it's surprisingly good.

07 September 2019, 21:13	#47
Irl Registered User Join Date: Feb 2017 Location: Denver Posts: 76	Diagrom.com is not resolving properly today. I hope this is temporary, but if you need the latest stable ROM, it is on Internet Archive here: https://web.archive.org/web/20190812...le/DiagROM.zip

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