Hello
I soldered the Tf536 pcb purchased from Shop Exxos over the weekend.
In the Amiga 500 with Kickstart os3.2 tested I got the error as in the picture.
I checked the soldering points again but I can't find anything wrong.
maybe you can help me with my investments
4BE3F0FE-7F37-47AC-A898-581E694D6722.jpeg (485.85 KiB) Viewed 2663 times
A diagnostic failure on the 536 is almost always a RAM soldering issue.
Check the following:
1. You definitely don't have any bridges or unconnected pins on IC7,IC8 or U1-U4. Use magnification to check. Also check for bridges and unconnected pins on the CPLD side, particularly those pins linking the CPLD to IC7 and IC8.
2. The memory chips you are using are definitely suitable for the TF536. If you got them from somewhere reputable and the part numbers are know to work then they are probably fine. If you got them from AliExpress or UTSource then they are possibly faulty or not what they claim to be.
3. IC7,IC8 as well as U1, U2, U3 and U4 all have correct pin1 orientation i.e. they're not soldered in 180 degrees out of whack.
Upload some clear, well lit photos, without nasty reflections if possible. Viewed from top down and 45 degree angle on soldered edges of the chips listed above.
The red screen is usually a sign the ram is totally dead. if it was slightly working or partially (areas etc) it would boot loop.
———
"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."
Bmrsred wrote: Thu Jan 12, 2023 8:37 pm
Hi
Thank you for the many ideas you are great.
Unfortunately I have problems with my microscope I will upload it at the weekend.
You are right, I will swap the ram.
I will order the ones from Digi-key.
what do you think of these?
MT48LC16M16A2P-6A:G TR
