Apple Macintosh Powermac Performa 200 Service Manual

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Service Source

Macintosh Classic/

Classic II/Performa 200

Service Source

Basics

Macintosh Classic/Classic II/

Performa 200

Basics Overview - 1

Overview

This manual includes complete repair procedures for the Macintosh Classic, Classic II, and Performa

200.

Figure: Macintosh Classic/Classic II and Performa 200

Service Source

Speciﬁcations

Macintosh Classic/Classic II/

Performa 200

Specifications Processor - 1

Processor

Classic CPU

Classic II/Per 200 CPU

Motorola 68000 microprocessor

7.8336 MHz 32-bit internal data bus 256-byte instruction and data caches

Motorola 68030 microprocessor 16 MHz 32-bit internal data bus 256-byte instruction and data caches

Specifications Memory - 2

Memory

RAM

Classic: Classic II/Per 200:

ROM

PRAM

Cache Connector

1 MB, expandable to 4 MB (120 ns or faster SIMMs) 2 MB, expandable to 10 MB (120 ns or faster SIMMs)

512K

256 bytes of parameter memory

44-pin connector for optional memory expansion 256K by 4-bit DRAMs Includes two SIMM connectors for additional RAM expansion

Specifications Disk Storage - 3

Disk Storage

Floppy Drive

Hard Drive

Classic: Classic II/Per 200:

Internal 1.4 MB floppy drive Optional external 800K or 1.4 MB floppy drive

Optional internal 40 MB hard drive; optional external SCSI drive Internal 40 MB or 80 MB hard drive; optional external SCSI

drive

Specifications I/O Interfaces - 4

I/O Interfaces

Floppy Drive

SCSI

Apple Desktop Bus

Serial

Sound

External drive port; DB-19 connector

One SCSI parallel port; DB-25 connector

One Apple Desktop Bus (ADB) port; mini DIN-4 connector

Two RS-422 serial ports; mini DIN-8 connectors

Dual-channel headphone connector Connected to the monophonic sound output Macintosh Classic does not provide true two-channel output

(although stereo jack may be used)

Specifications I/O Devices - 5

I/O Devices

Keyboard

Mouse

Classic II/Per 200 Microphone

80 keys, with numeric keypad; ADB connector

Mechanical tracking; ADB connector

Electret, omnidirectional; output voltage is 4 mV, peak to peak, at

normal volume

Specifications Sound and Video - 6

Sound and Video

Sound Generator

Classic:

Video Display

Classic II/Per 200:

Four-voice sound with 8-bit digital/analog conversion, using

22-kHz sampling rate

Monophonic, 8-bit digital/analog conversion using 22-kHz

sampling rate; capable of driving stereo headphones or other stereo equipment through the sound jack

9-in. (diagonal) screen; high-resolution, 512 by 342 pixel,

bit-mapped, monochrome display

Specifications Electrical - 7

Electrical

Line V oltage

Frequency

Maximum Power

100–120 V AC

47–63 Hz, single phase

100 W

Specifications Physical - 8

Physical

Dimensions

Weight

Height: 13.2 in. (33.6 cm) Width: 9.7 in. (24.6 cm) Depth: 11.2 in. (28.5 cm)

16–17.1 lb. (7.3-7.8 kg) not including internal hard drive

Service Source

Troubleshooting

Macintosh Classic/Classic II/

Performa 200

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 Symptom Charts/Video - 2

Symptom Charts

Video

Screen is dark; audio and drive operate

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

1 Readjust brightness (see Adjustments). 2 Readjust contrast (see Adjustments). 3 Check yoke cable connection. 4 Replace power/sweep board. 5 Replace logic board. Retain customer’s SIMMs. 6 Replace CRT.

1 Replace power/sweep board. 2 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Video

(Continued)

- 3

Screen is dark; fan is not running

Single vertical line is displayed

Single horizontal line is displayed

Vertical bars or stripes are displayed

Video

Replace power/sweep board.

1 Replace power/sweep board. 2 Replace logic board. Retain customer’s SIMMs. 3 Replace CRT.

1 Replace power/sweep board. 2 Replace logic board. Retain customer’s SIMMs.

(Continued)

Troubleshooting Symptom Charts/Video

(Continued)

- 4

Video

Horizontal bars or stripes are displayed

White dot is displayed in center of screen

Screen jitters 1 Move computer away from adjacent monitors or other

1 Replace power/sweep board. 2 Replace logic board. Retain customer’s SIMMs.

1 Verify that yoke cable is connected. 2 Replace power/sweep board. 3 Replace CRT.

2 Replace power/sweep board.

(Continued)

electrical equipment that may cause interference.

Troubleshooting Symptom Charts/Video

(Continued)

- 5

After replacement of failed hard drive, video distortion appears in upper and lower corners of screen

Video

Check whether hard drive replacement was like-for-like. If not, install a like drive.

(Continued)

Troubleshooting Symptom Charts/Floppy Drives - 6

Floppy Drives

Audio and video are present, but internal floppy drive does not operate

External floppy drive does not operate

Disk ejects; display shows icon with blinking “X”

1 Replace bad disk with known-good disk. 2 Replace floppy drive cable. 3 Replace floppy drive. 4 Replace logic board. Retain customer’s SIMMs.

1 Replace bad disk with known-good disk. 2 Be sure external floppy drive is placed on right side of

computer. 3 Replace external floppy drive. 4 Replace logic board. Retain customer’s SIMMs.

1 Replace bad disk with known-good system disk. 2 Replace floppy drive. 3 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Floppy Drives

(Continued)

- 7

Floppy Drives

Unable to insert disk all the way

Does not eject disk 1 Insert opened paper clip into hole beside floppy drive.

Internal floppy drive runs continuously

1 Insert opened paper clip into hole beside floppy drive. 2 Switch off system and hold mouse button down while

switching system on (to complete eject cycle). 3 Replace floppy drive.

2 Switch off system and hold mouse button down while

switching system on (to complete eject cycle). 3 Replace floppy drive.

1 Replace bad disk with known-good disk. 2 Replace floppy drive. 3 Replace logic board. Retain customer’s SIMMs. 4 Replace floppy drive cable.

(Continued)

Troubleshooting Symptom Charts/Hard Drives - 8

Hard Drives

Internal or external hard drive does not operate

Works with internal or external SCSI device but does not work with both.

1 Verify that SCSI loopback card is not attached. 2 Check that internal SCSI terminator is positioned in

connector properly. 3 Verify that internal hard drive has all three terminating

resistor packs on circuit board. 4 Replace hard drive data cable. 5 Replace hard drive. 6 Replace logic board. Retain customer’s SIMMs.

1 Verify that SCSI device ID switch setting on external device

is higher than 0. Also verify that ID switch setting on

external SCSI device does not duplicate ID switch settings on

any other attached external SCSI devices. 2 Replace terminator on external SCSI device. 3 Verify that terminator is installed on internal SCSI drive. 4 Replace SCSI select cable.

Troubleshooting Symptom Charts/Peripheral - 9

Peripheral

Cursor does not move 1 Check mouse connection.

2 If mouse was connected to keyboard, connect it to rear ADB

port instead. If mouse works, replace keyboard. 3 If mouse does not work in any ADB port, replace mouse. 4 Replace logic board. Retain customer’s SIMMs.

Cursor moves, but clicking the mouse button has no effect

1 Replace mouse. 2 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Peripheral

(Continued)

- 10

Cannot double-click to open application, disk, or server

No response to any key on keyboard

Peripheral

1 Remove extra system files on hard drive. 2 Clear parameter RAM. Hold down <Shift> <Option>

<Command> keys and select Control Panel from Apple pull-

down menu. Reset mouse controls. 3 If mouse was connected to keyboard, connect it to rear ADB

port instead. If mouse works, replace keyboard. 4 If mouse does not work in any ADB port, replace mouse. 5 Replace logic board. Retain customer’s SIMMs.

1 Check keyboard connection to ADB port. 2 Replace keyboard cable. 3 Replace keyboard. 4 Replace logic board. Retain customer’s SIMMs.

(Continued)

Troubleshooting Symptom Charts/Peripheral

(Continued)

- 11

Known-good ImageWriter or ImageWriter II does not print

Known-good LaserWriter does not print.

Peripheral

1 Make sure that Chooser and Control Panel are set correctly. 2 Replace printer driver and system software with known-

good. 3 Replace printer interface cable. 4 Replace logic board. Retain customer’s SIMMs.

1 Make sure that Chooser and Control Panel are set correctly. 2 Replace printer driver and system software with known-

good. 3 Refer to Networks manual.

(Continued)

Troubleshooting Symptom Charts/Miscellaneous - 12

Miscellaneous

Clicking, chirping, or thumping sound

Smoke/odor Replace power/sweep board.

No video, no audio, and no drive operation

1 Verify that logic board power cable is connected at J12 on

logic board. 2 Replace power/sweep board. 3 Replace logic board. Retain customer’s SIMMs.

1 Connect power cord. 2 Switch power on. 3 Replace power cord. 4 Replace fuse. 5 Replace power/sweep board. 6 Replace logic board. Retain customer’s SIMMs.

Troubleshooting Symptom Charts/Miscellaneous

(Continued)

- 13

Miscellaneous

“Sad Macintosh” icon 1 Replace bad disk with known-good disk.

2 Verify that jumper on memory expansion board is configured

correctly for “SIMMs” or “No SIMMs.” (See “Memory

Upgrade” in Additional Procedures.) 3 On 4 MB Macintosh Classic, confirm SIMMs used are eight-

chip SIMMs. (See Memory manual.) Any 1 MB SIMMs with

fewer than eight chips won’t work in the Macintosh Classic. 4 On Macintosh Classic, replace optional memory expansion

board; on Macintosh Classic II/Performa 200, replace

optional SIMMs in two SIMMs slots on logic board. 5 Replace logic board. Retain customer’s SIMMs.

(Continued)

Troubleshooting Symptom Charts/Miscellaneous

(Continued)

- 14

Screen shows “Sad Macintosh” icon and black vertical lines; screeching sound

Miscellaneous

1 Verify that jumper on memory expansion board is configured

correctly for “SIMMs” or “No SIMMs.” (See “Memory

Upgrade” in Upgrades.) 2 On 4 MB Macintosh Classic, confirm SIMMs used are eight-

chip SIMMs. (See Memory manual.) Any 1 MB SIMMs with

fewer than eight chips won’t work in the Macintosh Classic. 3 On Macintosh Classic, replace optional memory expansion

board; on Macintosh Classic II/Performa 200, replace

optional SIMMs in two SIMMs slots on logic board. 4 Replace logic board. Retain customer’s SIMMs.

(Continued)

Troubleshooting Symptom Charts/Miscellaneous

(Continued)

- 15

Miscellaneous

No power 1 Connect power cord.

2 Switch power on. 3 Replace power cord. 4 Replace fuse. 5 Replace power/sweep board. 6 Replace logic board. Retain customer’s SIMMs.

(Continued)

Service Source

T ak e Apart

Macintosh Classic/Classic II/

Performa 200

Take Apart Cover - 1

Cover

No preliminary steps are required before you begin this procedure.

Warning:

contains high voltage and a high-vacuum picture tube. To prevent serious personal injury or equipment damage, review CRT safety and discharge instructions in Bulletins/Safety.

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