Editing Apple Lisa 2/5

{{Infobox computer
| name         = Apple Lisa 2/5
| image        = [[File:Apple Lisa 2.jpg|260px|frameless]]
| caption      = A Lisa 2 series machine. The 2/5 is a Lisa 2 with an external ProFile hard disk.
| manufacturer = Apple Computer, Inc.
| type         = Personal computer
| release_date = January 1984<ref name="chm" />
| price        = US$3,495<ref name="chm" />
| cpu          = Motorola 68000 at 5 MHz<ref name="lisahw">Forrest Warthman and Associates for Apple Computer, ''LISA Hardware Manual'', final draft, 7 September 1982, section 1.3, p. 1-6. Hosted as [[:File:Lisa Hardware Manual Sep 1982.pdf]].</ref>
| memory       = 512 KB or 1 MB (one or two memory boards)<ref name="lisatp" />
| storage      = One 3.5-inch micro disk drive, 400 KB; external 5 MB ProFile<ref name="og84" />
| display      = 12-inch monochrome CRT, 720 × 364<ref name="og84" />
| os           = Lisa Office System; MacWorks
| ports        = Two serial (DB-25), one parallel (DB-25)<ref name="lisatp" />
| expansion    = Three internal expansion slots<ref name="lisatp" />
| dimensions   = 350 mm H × 475 mm W × 388 mm D (13.8 × 18.7 × 15.2 in)<ref name="og84" />
| weight       = 22 kg (48 lb)<ref name="og84" />
| predecessor  = [[Apple Lisa]]
| model        = Apple part numbers: power supply 661-93108, motherboard 661-93106, I/O board 661-93198
}}

The '''Apple Lisa 2/5''' is the [[Apple Lisa 2]] with an external ProFile hard disk. It was announced in January 1984 at US$3,495, alongside the [[Apple Lisa 2/10|Lisa 2/10]] and the Macintosh. Like every Lisa 2 it has one Sony 3.5-inch drive in place of the original Lisa's two Twiggy drives.<ref name="chm">Hansen Hsu, [https://computerhistory.org/blog/the-lisa-apples-most-influential-failure/ "The Lisa: Apple's Most Influential Failure"], Computer History Museum, January 19, 2023.</ref>

Apple's service manual defines the 2/5 as "a Lisa 2 with a 5 or 10 megabyte ProFile (external hard disk) connected to the built-in parallel port in back of the Lisa 2". Once a ProFile is connected, a Lisa 2 "becomes Lisa 2/5".<ref name="lisatp">Apple Computer, ''Apple Service Technical Procedures: Lisa/Macintosh XL'' (Lisa Level I Technical Procedures, #072-0085, pages revised to June 1987). Lisa 1.0 Set-up §C "Checking the Battery Switch" p. 2.6; Lisa 2 General Information pp. 2-3; Diagnostics p. 5.2.1; Lisa Troubleshooting Guide pp. 6.3-6.4 and 6.19; Lisa/Macintosh XL Troubleshooting pp. 6.5-6.6 and 6.16-6.18. Hosted as [[Apple Service Technical Procedures Lisa/Macintosh XL]] ([[:File:Apple Service Technical Procedures Lisa-Macintosh XL.pdf|PDF]]).</ref>

== Hardware ==
The Lisa 2/5 uses the Lisa 2 boards: power supply 661-93108 (the same part as the Lisa 1 US supply), motherboard 661-93106 and I/O board 661-93198. The [[Apple Lisa 2/10|Lisa 2/10]] has its own power supply, motherboard and I/O board.<ref name="lisal1">Apple Computer, ''Lisa Level 1 Technical Procedures'', #072-0085, March 1985, Illustrated Parts Lists (Lisa 1.0, Lisa 2, Lisa 2/10). Hosted as [[Apple Lisa Level 1 Technical Procedures Mar85]].</ref>

<templatestyles src="Template:StyledTable/styles.css" />
{| class="wikitable styled-table" style="width:100%;"
|+'''Lisa models compared'''<ref name="lisal1" /><ref name="lisatp" />
! Feature !! Lisa 1 !! Lisa 2/5 !! Lisa 2/10
|-
| Floppy drives || Two 5.25-inch Twiggy || One 3.5-inch, 400 KB || One 3.5-inch, 400 KB
|-
| Hard disk || External ProFile || External ProFile || Internal 10 MB
|-
| Parallel port || External || External || Internal only
|-
| Power supply || 661-93108 (US), 661-93149 (European) || 661-93108 || 661-73172
|-
| Motherboard || 661-93106 || 661-93106 || 661-93170
|-
| I/O board || 661-93104 || 661-93198 || 661-93171
|}

The Lisa 2 motherboard has three DB-25 connectors: two serial (Apple's "RS232 port A" and "port B") and one parallel.<ref name="lisatp" /> The I/O board carries the battery pack and no resistor at R-47; its disk controller ROM is 341-0290 rev. B at location 1-A.<ref name="lisatp" /> Apple's configuration table gives the Lisa 2 the "5 amp" power supply rated at 1.2 A AC input.<ref name="lisatp" />

With one memory board the machine has 512 KB and with two, 1 MB; two boards are needed to run the diagnostic diskette and the Lisa Workshop.<ref name="lisatp" />

== ProFile and software ==
Up to six more ProFiles can be added on optional parallel interface cards, and software boots from the micro disk drive or a ProFile.<ref name="lisatp" /> The Lisa Office System must be installed on the ProFile; Apple told technicians to upgrade every installation to version 3.1. Applications installed on the ProFile are serialised to one Lisa, so if the ProFile is moved to another Lisa the Office System starts but the applications will not open. The Office System and tools take about 2.5 MB of the ProFile. MacWorks can share the ProFile with the Office System, and on the Lisa 2/5 it supports only the built-in parallel port.<ref name="lisatp" />

== Battery switch ==
Apple's set-up procedure: remove the back panel, find the set of four batteries on the lower right side of the I/O board, and make sure the switch next to them is set to ON (toward the left).<ref name="lisatp" /> The pack is a 4.8 V NiCd that keeps the clock running when the Lisa is unplugged.<ref name="lisaio">Apple Computer, drawing 050-4008 rev. K, "Schematic, System I/O, Lisa", sheet 5. Hosted as [[:File:Apple Lisa I-O Board Schematic 050-4008-K.pdf]].</ref> Remove the cells from a stored machine before powering it up; see [[Apple Lisa Capacitor Replacement Guide]] and [[Battery Explosion, Capacitor or Corrosion Damage]].

== Diagnostics ==
An unmodified Lisa 2/5 shows boot ROM code H and I/O ROM code A8 in the upper right corner of the screen after the start-up icons; with the Screen Modification Kit fitted it shows 3A and A8.<ref name="lisatp" /> Error code 51, "Parallel port VIA", sends the technician to the I/O board first, then the CPU board and motherboard; codes 80-85 are ProFile errors.<ref name="lisatp" /> The full start-up sequence and error table are on [[Apple Lisa 2]] and [[Apple Lisa]].

In Apple's video repair table, "power supply trips (turns off and on)" lists brightness and contrast adjustment before replacing the supply; "a sizzling noise coming from Lisa" lists replacing the supply first.<ref name="lisatp" />

== Related pages ==
* [[Apple Lisa]]
* [[Apple Lisa 2]]
* [[Apple Lisa 2/10]]
* [[Macintosh XL]]
* [[Apple Lisa General Maintenance]]
* [[Apple Lisa Troubleshooting]]
* [[Apple Lisa Capacitor Replacement Guide]]

== References ==
<references />

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[[Category:Apple Vintage Computers]]
[[Category:Apple Lisa]]