Electronics > Repair

What more i can do?

<< < (80/112) > >>

asis:
You definitely need additional equipment.
At least:
a programmer  Labtool 48 XP/UXP.
UV irradiator for erasing microcircuits.
DSLogic 16 logic analyzer.
-
One scope is clearly not enough.

222Lab_Test222:

--- Quote from: asis on December 06, 2024, 02:04:02 am ---You definitely need additional equipment.
At least:
a programmer  Labtool 48 XP/UXP.
UV irradiator for erasing microcircuits.
DSLogic 16 logic analyzer.
-
One scope is clearly not enough.

--- End quote ---

Lets see if i can get any of them..

222Lab_Test222:
What shall we do next?
Where are we heading towards, its all dark ahead, we need some candles or some lights.

drhex:
So you tried known good EPROMs in the broken board, correct? If the address bus shows deviations after start and that is always the same, wrong data must be read causing wrong addresses on the bus or the board branches into different code (NMI stuck or similar). Have a look at the data lines and do the same thing as with addresses (will be easier with a logic analyzer). Have you checked the address lines at the EPROMs? Same signals as at the CPU?

222Lab_Test222:

--- Quote from: drhex on December 06, 2024, 02:06:45 pm ---Have you checked the address lines at the EPROMs? Same signals as at the CPU?

--- End quote ---
Those above all are address lines and data outputs of EPROMS.
CPU, is there a connection between EPROMS and CPU? I have not check and think from that side.

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod