Stephen_Usher
Well-known member
After finally getting around to looking at my second SE/30 and its SCSI problem I think I need a second opinion:
The machine is fully recapped and other than the SCSI issue works perfectly.
Symptoms:
I've buzzed out all the SCSI lines and the system data lines and they seem fine. Using an oscilloscope I can see data transfer on every SCSI data line. I'm using a known good SCSI device which works on other systems.
All the PCB tracks look fine, as you can see from the attached image.
So, I'm guessing that the issue is with a bad NCR53C80 SCSI chip?
The machine is fully recapped and other than the SCSI issue works perfectly.
Symptoms:
- SCSI disks are seen but any filesystem found on the device gives an error "Invalid name".
- Initialisation hangs and then times out.
I've buzzed out all the SCSI lines and the system data lines and they seem fine. Using an oscilloscope I can see data transfer on every SCSI data line. I'm using a known good SCSI device which works on other systems.
All the PCB tracks look fine, as you can see from the attached image.
So, I'm guessing that the issue is with a bad NCR53C80 SCSI chip?
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