Optional internal 40 MB hard drive; optional external SCSI drive
Internal 40 MB or 80 MB hard drive; optional external SCSI
drive
SpecificationsI/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)
SpecificationsI/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
SpecificationsSound 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
SpecificationsElectrical - 7
Electrical
Line V oltage
Frequency
Maximum Power
100–120 V AC
47–63 Hz, single phase
100 W
SpecificationsPhysical - 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
K
Service Source
Troubleshooting
Macintosh Classic/Classic II/
Performa 200
TroubleshootingGeneral/ - 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.
TroubleshootingSymptom 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
1Replace bad disk with known-good system disk.
2Replace floppy drive.
3Replace logic board. Retain customer’s SIMMs.
TroubleshootingSymptom Charts/Floppy Drives
(Continued)
- 7
Floppy Drives
Unable to insert disk
all the way
Does not eject disk1Insert opened paper clip into hole beside floppy drive.
Internal floppy drive
runs continuously
1Insert opened paper clip into hole beside floppy drive.
2Switch off system and hold mouse button down while
switching system on (to complete eject cycle).
3Replace floppy drive.
2Switch off system and hold mouse button down while
switching system on (to complete eject cycle).
3Replace floppy drive.
1Replace bad disk with known-good disk.
2Replace floppy drive.
3Replace logic board. Retain customer’s SIMMs.
4Replace floppy drive cable.
(Continued)
TroubleshootingSymptom 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.
1Verify that SCSI loopback card is not attached.
2Check that internal SCSI terminator is positioned in
connector properly.
3Verify that internal hard drive has all three terminating
resistor packs on circuit board.
4Replace hard drive data cable.
5Replace hard drive.
6Replace logic board. Retain customer’s SIMMs.
1Verify 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.
2Replace terminator on external SCSI device.
3Verify that terminator is installed on internal SCSI drive.
4Replace SCSI select cable.
TroubleshootingSymptom Charts/Peripheral - 9
Peripheral
Cursor does not move1Check mouse connection.
2If mouse was connected to keyboard, connect it to rear ADB
port instead. If mouse works, replace keyboard.
3If mouse does not work in any ADB port, replace mouse.
4Replace logic board. Retain customer’s SIMMs.
Cursor moves, but
clicking the mouse
button has no effect
1Connect power cord.
2Switch power on.
3Replace power cord.
4Replace fuse.
5Replace power/sweep board.
6Replace logic board. Retain customer’s SIMMs.
TroubleshootingSymptom Charts/Miscellaneous
(Continued)
- 13
Miscellaneous
“Sad Macintosh” icon1Replace bad disk with known-good disk.
2Verify that jumper on memory expansion board is configured
correctly for “SIMMs” or “No SIMMs.” (See “Memory
Upgrade” in Additional Procedures.)
3On 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.
4On Macintosh Classic, replace optional memory expansion
board; on Macintosh Classic II/Performa 200, replace
optional SIMMs in two SIMMs slots on logic board.
5Replace logic board. Retain customer’s SIMMs.
(Continued)
TroubleshootingSymptom Charts/Miscellaneous
(Continued)
- 14
Screen shows “Sad
Macintosh” icon and
black vertical lines;
screeching sound
Miscellaneous
1Verify that jumper on memory expansion board is configured
correctly for “SIMMs” or “No SIMMs.” (See “Memory
Upgrade” in Upgrades.)
2On 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.
3On Macintosh Classic, replace optional memory expansion
board; on Macintosh Classic II/Performa 200, replace
optional SIMMs in two SIMMs slots on logic board.
4Replace logic board. Retain customer’s SIMMs.
(Continued)
TroubleshootingSymptom Charts/Miscellaneous
(Continued)
- 15
Miscellaneous
No power1Connect power cord.
2Switch power on.
3Replace power cord.
4Replace fuse.
5Replace power/sweep board.
6Replace logic board. Retain customer’s SIMMs.
(Continued)
K
Service Source
T ak e Apart
Macintosh Classic/Classic II/
Performa 200
Take ApartCover - 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.
This product
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