E-mu Emulator Sampler User Forum for the EIII EII EI and EIII XP - EIII SCSI hardware error

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Author Topic: EIII SCSI hardware error  (Read 18415 times)
midipuppies
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« on: August 13, 2009, 06:16:17 PM »
Got a new problem with the EIII.

Whenever I try to access the internal disk, I get a SCSI HARDWARE ERROR flashing.
I changed the internal cable- still the same.
I swapped out various drives that I KNOW are good- still the same.
The drives all spin up no problem.

Any ideas?

UPDATE: I can get into diagnostics, and the drive is recognized and all the tests run and pass. WTF.
« Last Edit: August 13, 2009, 06:34:59 PM by midipuppies » Logged
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dr.c
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« Reply #1 on: August 14, 2009, 04:24:19 AM »
Look at the second board, on the front (its just along the front edge, there is a circuit called "NCR5380".
Take it off and put it back. This is to clean the circuit socket.

If there is any external disk, take it away.

If you can stabilize you machine (I mean it stops blinking that crappy message) just try to save a blanck bank on the disk. It will correct the directory.

Do you have the same message if you start your machine with a diskette ?
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midipuppies
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« Reply #2 on: August 14, 2009, 04:58:21 AM »
No, the EIII boots fine with the floppy, it's only when I try to do anything with the internal hard disk. I get that same message if I try to copy software, format or save anything to it. I will try that circuit. Is it on the second board down? The one with the SCSI cables attached to the front?
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dr.c
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« Reply #3 on: August 14, 2009, 12:50:45 PM »
Exactly. Its a big circuit, a 40 pin
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midipuppies
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« Reply #4 on: August 19, 2009, 07:46:39 AM »
No luck. I have the feeling it is going to be tough to get this fixed. My knowledge is limited and parts are non existent Cry. Anyone need a parts unit?
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rokuez
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« Reply #5 on: August 19, 2009, 08:41:00 AM »
is the psu calibrated? there is a pot on the power supply that is used to calibrate it.
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midipuppies
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« Reply #6 on: August 19, 2009, 12:10:03 PM »
Is there a thread for that procedure?
Thanks, J
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dr.c
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« Reply #7 on: August 19, 2009, 02:10:28 PM »
I doubt very deeply, but we never know.

Measure the voltage between the card cage and a +5 on an integrated circuit (pin 14 or 16)

The voltage adjustment is on the power supply.

I will send pictures tomorrow with a complete method.
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midipuppies
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« Reply #8 on: August 30, 2009, 04:40:59 PM »
So I removed the chip that the good doctor said to do and it went back in ok.
Now it won't recognize any drive of any kind on the SCSI bus. It must see that there is a drive on the bus because it will not boot without one connected. All the drives I have tried spin up fine- the EIII just will not detect them. I am thinking that the SCSI controller circuit is toast.  Cry
If anyone has any suggestions, they would be greatly appreciated.

Jay
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dr.c
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« Reply #9 on: August 31, 2009, 12:54:58 PM »
If the circuit was toasted, it wouldn't see the internal disk.
Look if there is not a bent pin when you have put the circuit back in place. If you don't think so, just do it, even if you are sure. You would be surprised of how many times it happened to me.

Check the flat cable as well, please, sse in there is not a burned pin, especially pin 26.
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midipuppies
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« Reply #10 on: September 02, 2009, 08:17:29 AM »
I checked the pins on that IC and they are all ok and seated nicely. I have also tried changing the scsi cable (a few times now). Still no joy.
Jay
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dr.c
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« Reply #11 on: September 02, 2009, 11:01:40 AM »
What disk is it (brand, type)
Can you test another one ?

Do you get the error message if you type the buttons like "Master", "Sample", Edit" (whatever)....

Can you copy the software to a diskette ?
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midipuppies
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« Reply #12 on: September 02, 2009, 06:31:01 PM »
Please read my previous posts.
I have tried all kinds of compatible disks including the original functional quantum one. I have tried different cables. The sampler works just fine in every way except when I try to do anything related to SCSI.
No drives work of any kind. They all spin up. The SCSI bus will not detect any drive of any any kind.
The thing boots up fine from floppy and I can access all modules.
JUST NO SCSI Huh
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dr.c
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« Reply #13 on: September 03, 2009, 01:29:11 AM »
THIS IS CLEAR !!!! JUST NO SCSI !!!!!

Its the NCR5380, 99% of probability.

I posted : "If the circuit was toasted, it wouldn't see the internal disk."

Didi you check if :

a) - Wire 26 of the SCSI Cables (especially the one going to the external SCSI is not burned, or brown,
b) - The SCSI cable is not inverted
c) - No pins to where the SCSI cable go on the processor board are bent or damaged

Is the +5V a real +5V (+-0,1V  ON THE DISK POWER CONNECTOR)

If the voltage is low, check the +5V on the boards. If the voltage is NOT low on the boards, do not adjust the PSU, obviously !
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midipuppies
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« Reply #14 on: September 03, 2009, 07:47:53 AM »
Hi Doc, I checked all those things and all seems cool. Where am I going to find a new controller chip?
Jay
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