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Apple Lisa 2/5: Difference between revisions

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Verify against Apple's Lisa Level 1 Technical Procedures (hosted): replaced the unsourced 1.2 A / 0.7 A / 1.8 A 'DataPower' supply ratings with Apple's own part numbers (661-93108 / 661-93149 / 661-73172, plus motherboard and I/O board); Apple publishes no rail tolerance or PSU adjustment for the Lisa, only video adjustments; deleted the 'discrete Woz Machine on the 2/5, IWM only on the 2/10' claim as unsupported; sound is CVSD not PWM square wave; serial speed 38.4 kbps removed; added Apple'...
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| storage = 400 KB 3.5" floppy drive, external 5 MB ProFile hard drive
| storage = 400 KB 3.5" floppy drive, external 5 MB ProFile hard drive
| display = 12" monochrome CRT (720×364 pixels)
| display = 12" monochrome CRT (720×364 pixels)
| sound = PWM square wave with software-controlled volume
| sound = Mono, via a continuously variable slope demodulator (CVSD)
| dimensions = 15.2" H × 18.7" W × 13.8" D
| dimensions = 15.2" H × 18.7" W × 13.8" D
| weight = 48 lbs (22 kg)
| weight = 48 lbs (22 kg)
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| predecessor = [[Apple Lisa|Lisa 1]]
| predecessor = [[Apple Lisa|Lisa 1]]
| successor = [[Apple Lisa 2/10]]
| successor = [[Apple Lisa 2/10]]
| codename = Lisa
| model = Apple part numbers: power supply 661-93108, motherboard 661-93106, I/O board 661-93198
| model = A6S0200
}}
}}


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| Maximum RAM || 2 MB (via memory board upgrades)
| Maximum RAM || 2 MB (via memory board upgrades)
|-
|-
| ROM || 16 KB (bootstrap and self-test routines)
| ROM || 16 KB of bootstrap and self-test code
|}
|}


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The Lisa 2/5 used a single 400 KB Sony 3.5-inch floppy drive, replacing the dual Twiggy 5.25-inch drives of the Lisa 1. The Sony mechanism was more reliable and used the same format as early Macintosh computers.
The Lisa 2/5 used a single 400 KB Sony 3.5-inch floppy drive, replacing the dual Twiggy 5.25-inch drives of the Lisa 1. The Sony mechanism was more reliable and used the same format as early Macintosh computers.


The external ProFile drive connected via the parallel port on the rear of the unit. This port was managed by a VIA (6522 Versatile Interface Adapter) chip.
The external ProFile drive connects to the parallel port on the rear of the unit. Apple's error code '''51''' is "Parallel port VIA", which confirms the port is driven by a VIA and points the first replacement at the I/O board.<ref name="lisal1" />


=== Display ===
=== Display ===
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| Refresh Rate || 60 Hz vertical
| Refresh Rate || 60 Hz vertical
|-
|-
| Contrast || 64 software-controlled levels
| Contrast || Software-controlled, plus a hardware contrast adjustment on the video board that Apple's own fault table tells the technician to set to mid-range before condemning anything<ref name="lisal1" />
|-
|-
| External Video || RCA jack (non-standard composite output)
| External Video || RCA jack (non-standard composite output)
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! Port !! Description
! Port !! Description
|-
|-
| Serial Ports || 2× RS-232C (25-pin), up to 38.4 Kbps
| Serial Ports || 2 × RS-232C (25-pin). Apple names them RS232 port A and RS232 port B in its error codes 55 and 56<ref name="lisal1">Apple Computer, ''Apple Lisa Level 1 Technical Procedures'' (hosted here: [[Apple Lisa Level 1 Technical Procedures Mar85]]): Lisa Set-up 2.6 "Checking the Battery Switch"; Lisa 2 Diagnostics 5 "Interpreting the Boot ROM"; Lisa Troubleshooting Guide 6 and Appendix D "Start-up Error Codes"; Video Repair Procedures; and the Lisa 1, Lisa 2, Lisa 2/5, Lisa 2/10 and Macintosh XL Illustrated Parts Lists.</ref>
|-
|-
| Parallel Port || External ProFile/printer connection
| Parallel Port || External ProFile/printer connection
|-
|-
| Keyboard || 3-pin 1/4" phone plug, coiled cord
| Keyboard || Coiled cord to the I/O board; Apple part 661-93109<ref name="lisal1" />
|-
|-
| Mouse || DE-9 connector, single-button mechanical-optical
| Mouse || DE-9 connector, single-button mechanical-optical
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=== Power Supply ===
=== Power Supply ===
The Lisa 2/5 used the original Lisa power supply:
The Lisa 2/5 uses the same supply as the Lisa 1: Apple part '''661-93108''' for the US machine and
* North American: 1.2A at 120V, 60 Hz
'''661-93149''' for the European one. The [[Apple Lisa 2/10|Lisa 2/10]] uses a different part,
* International: 0.7A at 220-240V, 50 Hz
'''661-73172'''.<ref name="lisal1" />


This differs from the [[Apple Lisa 2/10|Lisa 2/10]], which required a higher-capacity 1.8A power supply to support the internal Widget drive.
'''Apple publishes no rail tolerance and no power-supply adjustment procedure for the Lisa.''' The
only adjustments in the Level 1 procedures are video ones — horizontal phase, brightness and
contrast, yoke and trim magnets.<ref name="lisal1" /> Note also that Apple's video fault table lists
'''"a sizzling noise coming from Lisa"''' and '''"power supply trips (turns off and on)"''' with
'''brightness and contrast adjustment as the first two remedies''', ahead of replacing the supply
— so a Lisa that trips is not automatically a supply fault.


== Differences from Other Lisa Models ==
== Differences from Other Lisa Models ==
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| Hard Drive || External ProFile || External ProFile 5 MB || Internal Widget 10 MB
| Hard Drive || External ProFile || External ProFile 5 MB || Internal Widget 10 MB
|-
|-
| Parallel Port || External || External || Internal (for Widget)
| Parallel Port || External || External || Internal (for the Widget)
|-
|-
| Power Supply || 1.2A || 1.2A || 1.8A (DataPower)
| Power supply (Apple P/N) || '''661-93108''' US, '''661-93149''' European || '''661-93108''' || '''661-73172'''
|-
|-
| Disk Controller || Discrete Woz Machine || Discrete Woz Machine || IWM chip
| Motherboard (Apple P/N) || '''661-93106''' || '''661-93106''' || '''661-93170'''
|-
| I/O board (Apple P/N) || '''661-93104''' || '''661-93198''' || '''661-93171'''
|}
|}
Apple's parts lists confirm that the Lisa 2/10 has a different power supply, motherboard and I/O
board from the Lisa 1 and Lisa 2.<ref name="lisal1" /> '''Supply current ratings and a "DataPower"
designation were previously given here and could not be sourced'''; the part numbers above are
checkable and the amperages were not.
A row claiming the Lisa 2/5 uses "a discrete Woz Machine" disk controller and only the 2/10 an
IWM has also been removed: nothing held here supports a split between the two Lisa 2
configurations on that point, and both read the same Sony 3.5-inch mechanism.


== Software Compatibility ==
== Software Compatibility ==
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For detailed maintenance practices including cleaning, PRAM battery management, power supply care, and CRT handling, refer to the [[Apple Lisa General Maintenance]] page.
For detailed maintenance practices including cleaning, PRAM battery management, power supply care, and CRT handling, refer to the [[Apple Lisa General Maintenance]] page.
== The I/O-board battery switch ==
Before treating a Lisa that has lost its clock as faulty, check the 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="lisal1">Apple Computer, ''Apple Lisa Level 1 Technical Procedures'' (hosted here: [[Apple Lisa Level 1 Technical Procedures Mar85]]): Lisa Set-up 2.6 "Checking the Battery Switch"; Lisa 2 Diagnostics 5 "Interpreting the Boot ROM"; Lisa Troubleshooting Guide 6 and Appendix D "Start-up Error Codes"; Video Repair Procedures; and the Lisa 1, Lisa 2, Lisa 2/5, Lisa 2/10 and Macintosh XL Illustrated Parts Lists.</ref>
A Lisa shipped or serviced with that switch off will not keep time and is not broken.
The pack itself should come out of any machine being restored — see
[[Apple Lisa Troubleshooting]] and
[[Battery Explosion, Capacitor or Corrosion Damage]].


== Troubleshooting ==
== Troubleshooting ==
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== Capacitor Replacement ==
== Capacitor Replacement ==


The Lisa 2/5 contains electrolytic and RIFA safety capacitors that require replacement for long-term reliability. See the [[Apple Lisa Capacitor Replacement Guide]] for detailed specifications and procedures.
The Lisa 2/5 contains electrolytic capacitors and a class-X mains safety capacitor that require replacement for long-term reliability. See the [[Apple Lisa Capacitor Replacement Guide]] for detailed specifications and procedures.


== ProFile Hard Drive ==
== ProFile Hard Drive ==
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