Macintosh Quadra 700

Quadra 700, releasd in 1991, was one of these faster Macs targeted to high-end market. The unit has, as most Quadras, Motorola 68040 processor with a full FPU included. By default, 4MB of RAM was build into mainboard and more could be installed using 30-pin RAM modules in 4 slots (usually, 8MB or 20MB configurations were used). Hard drives were up to choice - from 80MB for simple office work (but who bought Quadra 700 for office work?), a typical configuration with 160MB drive, up to high-end configuration with 400MB SCSI drive (made by Seagate), totally sufficient for databases and image processing. The average drive in 1991 was around 100MB, and in some applications even 20-40MB. There also was a drive-less version which, probably, was planned as network station.
With Quadra 700, Apple started a new trend in which a higher-end computers had tower cases while low-end got desktops, LCs even smaller "pizza box" casings. This particular casing was based on a desktop Macintosh IIci with modified front. The computer got some popularity especially in desktop publishing where its significant power was used for image processing. For larger video needs, it was possible to expand video memory using special SIMMs.


Model No: M5920

Year: 1992
Discontinued: 1994
CPU: Motorola 68040 25MHz
RAM: 20MB (16+4MB on board)
Max. RAM: 64MB (68 visible?)
RAM Type: 4x30-pin SIMM
Hard disk: 250MB SCSI, 3.5" SL
(originally 400MB)
Also delivered with 80MB, 160MB, diskless.
Floppy drives: 1 1.4M 3.5"
Some disk-less versions BTO
Other drives: -
Graphics: 512kB - 2MB VRAM
Sound: 1-channel
Display: External, 15-pin connector
Dedicated OS: Mac System 7.1
Maximum OS: Mac System 8.1
Expansions:  - ADB.
 - 4 SIMMs for RAM Expansion
 - ROM SIMM in some units
 - 4 VRAM SIMMs
 - 2 NuBus slots




(from Apple leaflet)

Connectors:  - 15-pin video connector
 - External SCSI port (DB25)
 - AAUI network card connector
  - 2 serial ports (RS-422) for modem and printer)
- 2 ADB connectors for keyboard and mouse
 - Sound output
 - Microphone in
 
 
 
 
 
 


My unit comes from a printing studio in which it was used with a large printing machine made by Linotype-Hell, a German company which made such devices. It was probably one of "Vulcan" series machines. It is also customized specifically for use with the device by a RIP board. The RIP (Raster Image Processor) is a specialized pricessor (here it's Intel i960), which converted document made in some document-description language (like PostScript or PCL) and bitmaps of different resolutions into stream of bits representing raster made on paper by printing machine. The interesting thing is that while the board contains own CPU and memory, it is not connected only by NuBus slot - the slot is used only to supply power and some control to board. The main data input is supplied by SCSI, the board, with proper drivers, uses a fast SCSI bus to get data. Such approach has been selected probably to minimize any delays which could be caused by e.g. other boards and could be fatal for constant output of bit stream for machine printing in real time.

Unfortunately, the hard disk was bad and I had to replace it, so I have no idea how exactly the software works. The 400MB SCSI unit (Seagate ST1480) uses 5 platters and quite oversized ceramic heads, during start-up these heads are kept dangerously close to hub. Any small shock before loading / after unloading when hub is spinning causes heads to hit the spinning hub and become irreversibly damaged.
 


Disassembly
Remove screw on the rear, unlatch two tabs and open it towards front. Remove cover. Now you have access to expansion boards and slots as well as CPU with its heatsink.
The power supply unit connects to the mainboard using a transfer connector located on its casing, not a cable.
To remove HDD, press two latches on its sled and it should be possible to remove it. Remember about LED connector - HDD LED is in the topmost vent hole.
To get into RAM, VRAM, battery and floppy disk drive, remove HDD and remove one screw in the round part of drives holder. Near the side there will be a latch - press it away from computer's side to unlock and remove. Power supply is interlocked with the drive holder, so remove it (it slides in two rails) together.
72-pin SIMMs are VRAM. 40-pin SIMMs are RAM.

https://www.youtube.com/watch?v=c4bPIjJVh8E - Mac Quadra advertisement featuring Quadra 700.
http://lowendmac.com/thompson/06/0512.html - Someone made a multimedia system of LC Mac. Not Quadra 700, but similar.
https://archive.org/details/TNM_Macintosh_Quadra_Sales_Brochure_from_Apple_Computer/page/n1 - Quadra sales brochure, information about Quadra 700 and 900/950, photos and expansion possibilities.