Editing Macintosh Performa 5270CD

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{{Infobox computer
| name         = Macintosh Performa 5270CD
| image        = [[File:PowerMacintosh_5260.jpg|260px|frameless]]
| caption      = Macintosh Performa 5260/120, the same case as the Performa 5270CD. Photo: Stephen Edmonds, Wikimedia Commons, CC BY-SA 2.5
| manufacturer = Apple Computer, Inc.
| type         = All-in-one desktop personal computer
| release_date = April 15, 1996 (Apple); April 22, 1996 (EveryMac)
| discontinued = February 1, 1997 (EveryMac)
| price        = Not sold in the US
| cpu          = PowerPC 603e at 100 MHz
| memory       = 8 MB, expandable to 64 MB
| rom          = 4 MB
| storage      = 1.2 GB IDE hard drive; 4× CD-ROM; 1.4 MB SuperDrive (manual insert)
| display      = Built-in 14-inch shadow-mask CRT; 640 × 480 at 16-bit
| sound        = 16-bit stereo output, 16-bit mono input
| dimensions   = 445 × 406 × 383 mm (17.5 × 16 × 15.1 in)
| weight       = 45 lb (20.4 kg)
| os           = System 7.5.3 and later
}}
The '''Macintosh Performa 5270CD''' is an all-in-one Macintosh with a 100 MHz PowerPC 603e and a built-in 14-inch monitor. Apple gives its introduction date as April 15, 1996 and says it was not sold in the US. Its figures are those of the [[Macintosh Performa 5260CD|Performa 5260CD]] with a 1.2 GB hard drive.<ref name="apple">Apple, [https://support.apple.com/en-us/112238 "Macintosh Performa 5270CD: Technical Specifications"].</ref> EveryMac gives April 22, 1996 for the introduction and February 1, 1997 for the discontinuation, lists order number M4796J/A, and says it was sold in Asia and Europe.<ref name="em">EveryMac, [https://everymac.com/systems/apple/mac_performa/specs/mac_performa_5270cd.html "Macintosh Performa 5270CD Specs"].</ref> Apple's ''Service Source'' for the 5260 and 5280 covers the same hardware as the Power Macintosh 5260/100.<ref name="ss5260">Apple Computer, ''Service Source: Power Macintosh/Performa 5260, 5280 Series'' (1997), [[:File:Powermac.perf 5260.5280.pdf]]; see [[Power Macintosh/Performa 5260, 5280 Series Service Source]]. Page numbers are PDF pages.</ref>

== Hardware ==
{| class="wikitable styled-table" style="width:90%;"
|+ '''Apple's ''Service Source'' figures for the 5260 and 5280'''
! Item !! Figure
|-
| Processor || PowerPC 603e at 100 MHz (5260/100) or 120 MHz (5260/120, 5280); 64-bit PowerPC bus
|-
| RAM || 16 MB minimum; two 72-pin SIMM sockets, 80 ns or faster; 64 MB maximum
|-
| ROM and cache || 4 MB ROM; 256 KB level 2 cache
|-
| Video || 1 MB DRAM frame buffer on the logic board; 640 × 480 at 16-bit
|-
| Display || 14-inch shadow-mask CRT, 12.8-inch viewable; 0.28 mm dot pitch; 66.7 Hz; active raster 240 × 185 mm; 9,300 K white point
|-
| Storage || 800 MB, 1.2 GB or 1.6 GB IDE hard drive; AppleCD 600i (5260/100) or AppleCD 1200i (5260/120, 5280); 1.4 MB SuperDrive, manual insert
|-
| Ports || One ADB; two serial (mini DIN-8); external SCSI DB-25 for up to seven devices; sound input; front headphone jack and rear stereo output
|-
| Expansion || LC processor-direct slot (96/114-pin); 112-pin communications slot; 60-pin video-in slot; TV tuner connector; external video connector slot
|-
| Electrical || 100–240 VAC, 47–63 Hz; 240 W maximum; 4.0 A maximum; 40 A peak inrush
|-
| Dimensions || 17.5 × 16 × 15.1 in (445 × 406 × 383 mm)
|}
Source: pp. 4, 9–11 and 28–43.<ref name="ss5260" />

The 5260 looks like the [[Macintosh Performa 5200|5200 series]] but its logic board (661-1116 at 100 MHz, 661-1265 at 120 MHz), power supply board (661-1133), analogue/video board (661-1134) and CRT (661-1135) all have different part numbers from the 5200's (p. 216).<ref name="ss5260" /><ref name="ss52">Apple Computer, ''Service Source: Power Macintosh/Performa 5200 and 5300 (not 5260, 5280)'' (1997), Adjustments, pp. 275–317, and exploded view, p. 319, [[:File:Powermac.perf 5200.5300.pdf]].</ref> The 5200 series has a 15-inch tube and a 125 W, 2.5 A supply; the 5260 has a 14-inch tube and a 240 W, 4.0 A supply. Apple's 5200 manual marks every adjustment page "not for 5260, 5280".<ref name="ss52" /><ref name="ss5260" />

The processor-direct slot takes many cards made for the Macintosh LC, but Apple says it is not a true PDS: cards that work with the main processor, such as cache or FPU cards, do not work (p. 11).<ref name="ss5260" /> A Cuda microcontroller handles soft power, resets, PRAM, ADB and the real-time clock; Apple says many system problems clear after pressing the Cuda reset button on the logic board (pp. 21, 178).<ref name="ss5260" />

The PRAM battery connects to the logic board by a plug and sits on hook-and-loop tape. Apple's test is to replace it below 3.0&nbsp;V (pp. 174–177); Apple's technical specifications give the battery type as 4.5&nbsp;V alkaline.<ref name="ss5260" /><ref name="apple" />

== Adjustments ==
Apple's adjustments for the 5260 and 5280 are light meter setup, geometry, video and power supply. Apple requires the power-supply adjustment whenever the analogue board or power supply is taken out: connect a DC voltmeter between the metal chassis and pin 3 of P805 on the power supply, and set R828 for 110 V DC (pp. 213–214).<ref name="ss5260" /> The 5200 series high-voltage adjustment (29.5 V at D713 or D703) does not apply.<ref name="ss52" />

'''The power supply and analogue board carry mains and CRT voltages, and the power-supply adjustment is made with the machine running. Discharge the CRT before working near it; see [[CRT Discharge Procedure]].'''

== Maintenance and repair ==
Apple's symptom charts for this family are in its ''Service Source''.<ref name="ss5260" /> The 5200 series guides cover the same kind of chassis, but their board part numbers and the high-voltage adjustment do not apply to the 5260:
* [[Macintosh Performa 5200CD Troubleshooting]]
* [[Macintosh Performa 5200CD General Maintenance]]
* [[Macintosh Performa 5200CD Capacitor Replacement Guide]]

== Service documentation ==
<pdf width="800" height="500">File:Powermac.perf_5260.5280.pdf</pdf>

== Related pages ==
* [[Power Macintosh 5260]]
* [[Macintosh Performa 5260]]
* [[Macintosh Performa 5260CD]]
* [[Macintosh Performa 5280]]
* [[Macintosh Performa 5200]]

== References ==
<references />

[[Category:Apple Vintage Computers]]
[[Category:All-in-One Macintosh]]
[[Category:Macintosh Performa]]
{{Navbox-AppleVintage|state=collapsed}}