Apple Macintosh Powermac Performa 580CD Service Manual

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Service Source

Macintosh LC 580/

Performa 580CD

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Service Source

Basics

LC580/Performa 580CD

Basics General Information - 1

General Information

Overview

These computers are higher-performance versions of the
Macintosh LC 575. Each features a 33 MHz 68040 logic
board with 4 MB of soldered DRAM (expandable to 52 MB
with two 72-pin SIMMs, 80 ns or less).

Macintosh LC 580

The Macintosh LC 580 supports various options, including
an IDE hard drive and a trayloading double-speed CD-ROM
drive.

Basics General Information - 2

Performa 580CD

Performa versions of Macintosh products include specific
bundles of software and hardware configurations.

The Performa 580CD is bundled with a 500 MB IDE hard
drive and a trayloading double-speed CD-ROM drive.

The information in this manual is applicable to both the
Macintosh and Performa versions unless specified
otherwise.

Basics General Information - 3

Rear View Diagram

Video-In

Access Cover

External Video

Connector Cover

Communications

Card Access Cover

LC Processor-Direct

Expansion Card

Access Cover

Basics General Information - 4

Video-In

Slot

SIMMs
Single or
Double
Bank Slot

SIMMs
Single
Bank Slot

Cudo
Reset
Button

External Video
Connector Slot

Logic Board Diagram

Battery

Communications
Slot

LC Processor-Direct
Slot

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Specifications

LC 580/Performa 580CD

Specifications Processor - 1

Processor

Motorola 68LC040 microprocessor
33 MHz
Built-in memory management unit (MMU)

Specifications Memory - 2

Memory

RAM

ROM

PRAM

VRAM

4 MB of dynamic RAM on board
Expandable to 52 MB (fast-paced mode 80 ns DRAM SIMMs)
Two 72-pin SIMM connectors

1 MB of ROM

256 bytes of parameter memory
Long-life lithium battery

1 MB of DRAM soldered to logic board
Can display thousands of colors (16-bit)

Specifications Disk Storage - 3

Disk Storage

Floppy Drive

Hard Drive

CD-ROM Drive

Built-in 1.4 MB Apple SuperDrive, manual-inject

Internal IDE hard drive

Optional internal CD-ROM drive

Specifications I/O Interfaces - 4

I/O Interfaces

Serial

SCSI

Apple Desktop Bus

Two RS-232/RS-422 serial ports for external modem and

printer
Modem port uses a 9-pin mini-DIN connector
Printer port uses an 8-pin mini-DIN connector

One SCSI port for expansion
Accommodates up to six external SCSI devices

One AppleDesktop (ADB) port for keyboard and mouse
Maximum of three ADB devices recommended
Maximum current draw: 500 mA(Mouse draws 10 mA; keyboard

draws 25 mA.)

Specifications I/O Interfaces - 5

Sound

Processor-Direct Slot

Communications Slot

Video-In Slot

External Video Connector Slot

Sound-input port for monaural sound input
Sound-output port capable of delivering 8-bit stereo sound
Stereo headphone jack capable of delivering 8-bit stereo sound

Internal expansion slot for 114-pin processor-direct expansion

card

Internal expansion slot for optional 112-pin fax modem or

Ethernet card

Internal, 60-pin video-in slot for optional expansion card that

provides real-time video display, capture, and overlay

One 22-pin connector for a second monitor

Specifications I/O Devices - 6

I/O Devices

Keyboard

Mouse

Microphone

Speaker

Supports all Apple Desktop Bus (ADB) keyboards

Apple Desktop Bus Mouse II
Mechanical tracking, optical shaft, or contact encoding

Integrated microphone for mono sound input

Integrated stereo speakers capable of delivering 8-bit stereo

sound

Specifications Sound and Video - 7

Sound and Video

Sound Generator

Records at 11 kHz or 22 kHz sample rate
Plays back at 11 kHz or 22 kHz sample rate
Two speakers with enhanced stereo sound
With optional CD-ROM drive, allows playback of ordinary audio

compact discs

Specifications Sound and Video - 8

Video Display

14-in. diagonal, high-resolution screen (11.5-in. viewable

image)
Gun Configuration: Horizontal inline
Phosphor (aluminized): P22 derivative
Phosphor CIE Coordinates:
Red x = 0.625 ± 0.020, y = 0.340 ± 0.020
Green x = 0.280 ± 0.020, y = 0.595 ± 0.020
Blue x = 0.155 ± 0.015, y = 0.070 ± 0.015
Dot Pitch: 0.28 mm dot pitch shadow mask
Vertical Frequency: 66.7 Hz
Active Raster Size (nominal): 9.5 in. by 7.3 in. (240 mm by 180

mm)
White Point: 9300° K
Shipping Brightness (nominal): 30 ± 5 foot lamberts

Specifications Sound and Video - 9

Video Timings

Horizontal Timing

Vertical Timing

640 x 480 Resolution @ 66.67 Hz
Back Porch: 96 dots
H SYNC: 64 dots
Front Porch: 64 dots
1 dot: 33.06878 ns
1 H: 28.5714 µs
1/dot: 30.24 MHz
Back Porch: 39 H
V SYNC: 3 H
Front Porch: 3 H
1 H: 28.5714 µs
1/H: 35.000 kHz
1 V: 15.000 ms

Specifications Sound and Video - 10

External Video Connector (Optional)

Supports video mirroring on the following external monitors (at

product introduction):

• 640 x 480 resolution: Macintosh 12” Color Display, Apple

Color Plus 14” Display, Apple Performa Plus Display, Apple

Multiple Scan 15 Display, Apple Multiple Scan 17 Display,

Apple Multiple Scan 20 Display

• 800 x 600 resolution: Apple Multiple Scan 15 Display, Apple

Multiple Scan 17 Display, Apple Multiple Scan 20 Display, and

SVGA monitors

Specifications Physical and Electrical - 11

Physical and Electrical

Dimensions

Weight

Power Supply

Height: 17.9 in. (45.5 cm)
Width: 13.5 in. (34.4 cm)
Depth: 16.5 in. (42.0 cm)

40.5 lb. (18.4 kg)

Voltage: 90 to 264 V rms
Frequency: 50–60 Hz, plus or minus 3 Hz, single phase
Surge Voltage: 300 V rms for 100 ms
Peak Inrush Current: 40 amps pk
Current: 2.0 amps maximum for all line and load conditions
Power: 120 W maximum for all line and load conditions
Line voltage: 100–240 VAC; RMS automatically configured

Specifications Physical and Electrical - 12

Audio Amplifier

Amplifier drives a 16-ohm speaker
Audio Input Voltage: 0.707 V rms
Audio Input Impedance: 10 K ohms
Output Power at 1 kHz: 250 mW
Bandwidth 3 dB: 200 Hz to 15 kHz
Total Harmonic Distortion: ≤ 1%

Specifications Environmental - 13

Environmental

Temperature

Relative Humidity

Operating Altitude

Operating: 50–104° F (10–40° C)
Transit: (72 hours): -40° F to +149° F (-40° C to +65° C)
Storage (6 months): -40 to 116.6° F (-40 to 47° C)

20–95% noncondensing

0–10,000 ft. (0–3,000 m)

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Troubleshooting

LC 580/Performa 580CD

Troubleshooting General/ - 1

General

The Symptom Charts included in this chapter will help you
diagnose specific symptoms related to your product. Because cures
are listed on the charts in the order of most likely solution, try
the first cure first. Verify whether or not the product continues to
exhibit the symptom. If the symptom persists, try the next cure.
(Note: If you have replaced a module, reinstall the original module
before you proceed to the next cure.)

If you are not sure what the problem is, or if the Symptom Charts
do not resolve the problem, refer to the Flowchart for the product
family.

For additional assistance, contact Apple Technical Support.

Troubleshooting First Checklist/ - 2

First Checklist

Important:

needless module replacement.

Do you know that...

• The CRT raster will not always resemble a perfect rectangle.

CRT tolerances allow for some distortion. Additional distortion

can be caused by magnetized metal objects (desks, file

cabinets, etc.). Move the unit to a different location if you

notice raster bowing or bent raster edges.

• Jitter, faint lines, or screen movement can be caused by

external interference such as electronic devices and

fluorescent lights. Move the unit to another room or building to

help determine if external interference is the source of the

problem.

• A misadjusted screen can mimic the same symptoms as analog

Read this checklist before you replace a module. Avoid

Troubleshooting First Checklist/ - 3

board or CRT failures. By performing the adjustment

procedures, you might determine if one or more of the

adjustments is the cause of the problem.

• CRTs rarely fail. Needless CRT replacements can be prevented

by checking display adjustments, checking the possibility of

other defective modules, and accepting small imperfections in

screen display.

If you have any doubts about whether a CRT needs replacement,
contact Apple Technical Support.

Troubleshooting Symptom Charts/Audio - 4

Symptom Charts

Audio

Sound distortion with
MPEG board installed

Replace MPEG board with modified MPEG board. A modified board
should have a jumper present from U5 Pin 2 to D1 Pin 1.

Troubleshooting Symptom Charts/Video - 5

Video

Screen is black, too
dark, or too bright;
audio and drive
operate

Screen is bright and
audio is present, but
no video information
is visible

1 Adjust contrast button on front bezel.
2 Adjust brightness button on front bezel.
3 Check yoke cable connection.
4 Perform video adjustments. Refer to “Video” in Adjustments

chapter.
5 Replace analog board.
6 Replace CRT.

1 Perform video adjustments. Refer to “Video” in Adjustments

chapter.
2 Replace analog board.

Troubleshooting Symptom Charts/Video

(Continued)

- 6

Screen is completely
black except for
single vertical or
horizontal line
displayed

Predominant color
tint or color cannot be
adjusted

Picture breaks into
diagonal lines, or
picture rolls
vertically or
horizontally

Video

1 Check yoke cable connection with power off.
2 Replace analog board.
3 Replace CRT.

Perform video adjustments. Refer to “Video” in Adjustments
chapter.

1 Perform geometry adjustments. Refer to “Geometry” in

2 Replace analog board.

(Continued)

Adjustments chapter.

Troubleshooting Symptom Charts/Video

(Continued)

- 7

Out of convergence
(color bleeds from
text or lines)

Black screen spots
(burnt phosphors)

Video

1 Perform convergence adjustment. Refer to “Convergence” in

2 Replace analog board.

Replace CRT.

(Continued)

Adjustments chapter. Note that some misconvergence is

normal, especially around edges of screen. Contact Apple

Technical Support if you’re uncertain whether the

misconvergence is within specification.

Troubleshooting Symptom Charts/Video

(Continued)

- 8

Video

Screen jitters or
flashes

Out of focus 1 Perform focus adjustment. Refer to “Focus” in Adjustments

1 Refer to “First Checklist” in this chapter. Move electrical

2 Move unit to another room or building and check if symptom

3 Replace analog board.

2 Check for proper screen luminance. If luminance is off,

3 Replace analog board.

(Continued)

devices (other monitors, scanners, etc.) away from monitor.

Temporarily shut off all fluorescent lights in area.

persists.

chapter. Note that misconvergence can also produce an out-

of-focus symptom.

perform cutoff and white balance adjustments. Refer to

“Video” in Adjustments chapter.

Troubleshooting Symptom Charts/Video

(Continued)

- 9

Raster size too short/
tall or narrow/wide

Linearity bad (size of
text/graphics differs
at top, bottom, or
sides of screen)

Video

1 Perform geometry adjustment. Refer to “Geometry” in

2 Replace analog board.

Replace analog board.

(Continued)

Adjustments chapter.