Quadra 840AV owners question

[Pushpull76]

hey all
I was lucky enough to find a Quadra 840av during 2019.
I already organized a full recap; when opened the mac, I found inside that the cdrom drive is a AppleCD 300 Plus unit.
I always saw (phisically or on various vintage ads) that the 840AV has the Apple cd with the gray caddy to insert.
My cd player is a swapped one or some 840av came out from Apple with this model?

 

[Unknown_K]

https://tim.id.au/laptops/apple/legacy/quadra_840av.pdf

Says CD 300 mechanism was optional. The unit sold for only 1 year July 93 to 94 so I assume early orders with CD had the caddy while later units had the tray loader bezels and drives. Any leftover inventory could be upgraded with whatever was handy at the time of sale plus users could have upgraded to CDROM with whatever bezels were around at the time.

 

[Pushpull76]

https://tim.id.au/laptops/apple/legacy/quadra_840av.pdf

Says CD 300 mechanism was optional. The unit sold for only 1 year July 93 to 94 so I assume early orders with CD had the caddy while later units had the tray loader bezels and drives. Any leftover inventory could be upgraded with whatever was handy at the time of sale plus users could have upgraded to CDROM with whatever bezels were around at the time.

Many thanks, I also found in the same document the exploded view of the chassis; there were two different types of front bezel for the cd player, one with and one w/out caddy.

 

[Unknown_K]

I don't think any 840avs came with manual inject floppy drives.

 

[Pushpull76]

I don't think any 840avs came with manual inject floppy drives.

Mine has one.

Macintosh 1.4MB Manual Inject Floppy Disk Drive - Higher Intellect Vintage Wiki

This type of disk drive showed up in Macintosh models around the 68040 era, replacing the auto-inject style drive. A few different vendors created these drives for Apple Computer:

wiki.preterhuman.net

 

[3lectr1cPPC]

As someone without any beige desktop macs, what's the different between the auto and manual inject drives?

 

[imactheknife]

My 840 is tray, quad 800, 660av caddy style

 

[Phipli]

As someone without any beige desktop macs, what's the different between the auto and manual inject drives?

The auto inject is sprung in a way that it snatches the disk off you and down into the mechanism. It doesn't have a black flap over the opening. They're older and exclusively made by Sony. The slot is just a rectangle in the computer. There are various size versions. This is an example in my SE :

Manual inject, the user has to push the disk all the way into the mechanism. To aid this, the slot in the case has "pursed lips". They have a black flap. They were fitted from part way through the 040 era until the beige G3s. They're all 1.44 (or whatever you want to call it - 1.2, 1.44, 2MB). They're made by several firms.

 

[3lectr1cPPC]

Thank you for the explanation, all the PowerBooks are manual inject and I've never used an auto inject drive. I knew of the flap discrepancy but not much else.

 

[Unknown_K]

The emergency eject hole is in different places, so you need different bezels.

 

[Pushpull76]

Another question for you all...I'm searching a DAT backup unit (internal) for my 840.
Someone know the model/brand that apple used at that time ?

Thanks for your patience!

 

[Pushpull76]

All I have found until now is :

PN 661-0795 Apple DDS-DC 4mm, 2 GB SCSI Tape Drive