Troubles with SCSI CD Rom

NeXT Computer, Inc. -> NeXT Black Hardware

Title: Troubles with SCSI CD Rom
Post by: Shuren on November 18, 2015, 05:38:32 AM
Hello, after some years, I restart my MonoStation, but i can't read any cdrom from the caddy (new or original). Here's the logs.

At the boot time:
Quotemach: SONY    CD-ROM CDU-541 Rev 2.6a as sd1 at sc0 target 5 lun 0
mach: sd1: UNIT ATTENTION

Trying to access cdrom:
Quotemach: sd1 (5,0): scsi_timer: timeout op:0x0 sd_state:7 scsi status:0x0
mach: Target 5: BUSY; retry 1
mach: Target 5: BUSY; retry 2
mach: Target 5: BUSY; retry ...

Any ideas?

Thank you,
Michele
Title: Troubles with SCSI CD Rom
Post by: pentium on November 18, 2015, 10:27:20 AM
Sony's early CD drives are starting to have issues with the surface mount capacitors within. I've found that replacing them brings the drives back.
Title: Troubles with SCSI CD Rom
Post by: barcher174 on November 18, 2015, 11:47:45 AM
Quote from: "pentium"Sony's early CD drives are starting to have issues with the surface mount capacitors within. I've found that replacing them brings the drives back.

I can almost 100% guarantee that is the issue here. I've fixed 4 drives with this exact same symptom. Guide here: http://www.asterontech.com/Asterontech/next_cdrom_refurb.html
Title: Troubles with SCSI CD Rom
Post by: Shuren on November 19, 2015, 08:44:08 AM
Thank You very much guys, I will try!
Title: Troubles with SCSI CD Rom
Post by: Rob Blessin Black Hole on August 14, 2017, 11:22:09 AM
Hello NeXT Community: I sent a working on video NeXT Sony 1X CD Rom out to a customer in Germany but apparently it is not powering on.... Does anyone know if they autoswitch to 220V ? Best Regards Rob Blessin
Title: Troubles with SCSI CD Rom
Post by: bobo68 on August 14, 2017, 04:20:25 PM
Quote from: "Rob Blessin Black Hole"Hello NeXT Community: I sent a working on video NeXT Sony 1X CD Rom out to a customer in Germany but apparently it is not powering on.... Does anyone know if they autoswitch to 220V ? Best Regards Rob Blessin

Yes: http://www.kevra.org/TheBestOfNext/NeXTProducts/NeXTHardware/ExternalCD-ROM-Drive/files/page624_2.pdf - "AC line voltage: 100 to 240V"
Title: Troubles with SCSI CD Rom
Post by: barcher174 on August 14, 2017, 05:22:06 PM
There is a fuse inside can go bad. Replacement details at the end of this PDF: http://tim.id.au/laptops/apple/misc/applecd_150.300.pdf
Title: Troubles with SCSI CD Rom
Post by: Rob Blessin Black Hole on August 15, 2017, 12:48:41 AM
Thanks I'll have him check the fuse! I'll bet that has happened to me before as well doh.  Best regards Rob Blessin

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