Apple powerbook 100 Service Manual

K Service Source

PowerBook 100

K Service Source

Specifications

PowerBook 100

Specifications	Processor - 1

CPU

Addressing

Processor

Motorola 68HC000, 16-bit CMOS microprocessor 15.6672 MHz

32-bit internal registers

24-bit address bus

16-bit data bus

Specifications	Memory - 2

RAM

ROM

PRAM

VRAM

Clock/Calendar

Memory

2 MB of 100 ns pseudostatic RAM (PSRAM) standard, expandable to 8 MB

256K (two 128K by 8-bit devices); 150 ns access time; addressing supports up to 4 MB

128 bytes of parameter memory

32K of pseudostatic video display memory

CMOS custom chip with long-life lithium battery

Specifications	Disk Storage - 3

Floppy Drive (Optional)

20 MB Hard Drive

Disk Storage

External Macintosh HDI-20 1.4 MB drive

4.5 W startup power; 1.25 W random operation; 50 mW idle

20 MB formatted capacity

Apple SCSI interface; 2.5 in. mechanism 23 msec average access time (maximum)

5.0 W startup power; 2.7 W random operation

40 MB Hard Drive

40 MB formatted capacity

Apple SCSI interface; 2.5 in. mechanism <19 msec average access time (maximum)

5.0 W startup power; 2.25–2.5 W random operation; 1.3–1.5 W idle

Specifications	I/O Interfaces - 4

Floppy Drive

SCSI

Apple Desktop Bus

Serial

I/O Interfaces

One HDI-20 floppy drive port for external 1.4 MB drive

One HDI-30 SCSI port; 1.5 MB/sec. transfer rate Supports five devices maximum

One Apple Desktop Bus (ADB) port; low-speed serial interface

Two RS-422 ports, one external and one internal 230.4 Kbaud minimum

Asynchronous, synchronous, and AppleTalk protocols supported Internal connector supports Macintosh PowerBook Fax/Data

modem

	Specifications	I/O Interfaces - 5
Sound		One sound output port for external audio amplifier

Specifications	I/O Devices - 6

Keyboard

Trackball

Mouse (Optional)

Floppy Drive (Optional)

I/O Devices

Built-in keyboard; ADB interface

Dimensions: 10.6 in. length, 3.5 in. width, .5 in. depth Pitch: .73 in. horizontal; .71 in. vertical

Dual-button trackball; 25 mm diameter; ADB interface

Low-power mouse; ADB interface

External Macintosh HDI-20 1.4 MB floppy drive

	Specifications	Sound and Video - 7
		Sound and Video
Sound		Apple Sound Chip; oneor four-voice mono (one or two voices in
		stereo) with 4-bit digital-to-analog conversion using 22-kHz
		sampling rate

Video Display

9 in. (229 mm) diagonal screen

Film-compensated Super Twist Nematic (FSTN), backlit flatpanel display

640 by 400 pixels; 75 dpi

Specifications	Electrical - 8

Main Battery

Backup Batteries

Frequency

ADB Power

Requirements

Electrical

Sealed lead-acid battery (7 V) 2.5 hrs. maximum capacity

Three 3.5 V lithium cells Industry-standard CR-2430 batteries 110–220 V

50–60 Hz

Maximum current draw for all ADB devices is 50 mA (maximum of three ADB devices recommended)

	Specifications	Electrical - 9
Power Adapter		Input voltage: 85–270 VAC (100/240 nominal); 48–62 Hz (50/
		60 nominal)
		Output voltage: 7.0–7.6 V (7.5 nominal); 5 mA–2 A (1.5
		nominal)
Sound		One sound output port for external audio amplifier

K Service Source

Troubleshooting

PowerBook 100

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	Power Manager Reset/ - 2

Power Manager Reset

Reset the power manager if the battery and power adapter are proven good, but the computer will not power on. The computer will not reset after a system crash.

To reset the power manager in the PowerBook 100,

•Remove the AC adapter and the battery.

•Let the unit sit without power hooked up for 3-5 minutes.

•Simultaneously hold down the Control, Command, Option, and Power On keys for 5-10 seconds.

•Reinstall the battery and, if necessary, reconnect the AC adapter.

•Turn on the computer.

Troubleshooting Symptom Charts/Startup - 3

Symptom Charts

Startup

Error chord sounds	1	Connect AC adapter and restart computer in three or four
during startup		minutes.
sequence	2	Replace memory expansion board (if installed). Refer to
		“Memory Expansion Card” in Upgrades.
	3	Replace motherboard.
	4	Replace daughterboard.
Screen displays	1	Reseat RAM expansion card.
checkerboard pattern;	2	Replace RAM expansion card.
no startup chime	3	Replace daughterboard.
	4	Reseat display cable.

Troubleshooting Symptom Charts/Power - 4

Power

Screen is blank;	1	Verify storage switch is in “on” position.
computer does not	2	Reset computer.
respond	3	Connect AC adapter and restart computer in three or four
		minutes.
	4	Install known–good, charged main battery. If computer
		works, replace main battery.
	5	Verify that keyboard cable is securely connected.
	6	Reset the power manager.
	7	Replace keyboard.
	8	Replace daughterboard.
	9	Replace motherboard.

		Troubleshooting	Symptom Charts/Power (Continued) - 5
			Power (Continued)
After main battery is			Replace backup batteries.
changed, some Control
Panel settings are
different

After all power sources are removed, some Control Panel settings are different

Condition is normal. Removing all power affects some Control Panel settings (such as time) that are stored in parameter RAM.

Troubleshooting	Symptom Charts/Power (Continued) - 6
	Power (Continued)

AC adapter is plugged in and connected, but battery DA does not indicate charger is connected

Low-power warning appears soon after computer starts

1Verify that AC adapter is connected properly.

2Try different main battery. If battery charges, replace main battery.

3Verify that adapter is good.

4Replace AC adapter.

5Replace motherboard.

1Attach AC adapter. Battery needs recharging.

2Verify that peripherals display low-power icon.

3Reduce use of floppy or hard drives, modem, sound, backlight, or other power-consuming devices or connect AC adapter.

		Troubleshooting		Symptom Charts/Video - 7
			Video
Screen suddenly goes			Condition is normal; computer has gone into sleep to conserve
blank			battery power.
Screen goes blank and			Adjust sleep delays in Control Panel or connect AC adapter.
computer shuts down
every few minutes
Pixel never comes on			Replace display.
Row of pixels never			1	Replace interconnect cable.
comes on			2	Replace display.
			3	Replace interconnect board.
			4	Replace daughterboard.
			5	Replace motherboard.
			6	Return computer to Apple.

		Troubleshooting		Symptom Charts/Video (Continued) - 8
			Video (Continued)
Pixel is always on			Replace display.
Partial or complete			1	Replace interconnect cable.
row of pixels is			2	Replace display.
always on			3	Replace interconnect board.
			4	Replace daughterboard.
			5	Replace motherboard.
			6	Return computer to Apple.

		Troubleshooting		Symptom Charts/Video (Continued) - 9
			Video (Continued)
Display is very light			1	Adjust screen contrast and brightness settings.
or totally white			2	Verify interconnect-cable-to-motherboard connection.
			3	Replace inverter board.
			4	Replace interconnect cable.
			5	Replace interconnect board.
			6	Replace display.
			7	Replace daughterboard.
			8	Replace motherboard.
			9	Return computer to Apple.

		Troubleshooting		Symptom Charts/Video (Continued) - 10
			Video (Continued)
No display but			1	Adjust screen contrast and brightness settings.
computer appears to			2	Verify interconnect-cable-to-motherboard connection.
operate correctly			3	Replace inverter board.
			4	Replace interconnect cable.
			5	Replace interconnect board.
			6	Replace display.
			7	Replace daughterboard.
			8	Replace motherboard.
			9	Return computer to Apple.
Display shows			Condition is normal for PowerBook 100 screen.
rainbow colors when
viewed from extreme
side angles

		Troubleshooting	Symptom Charts/Video (Continued) - 11
			Video (Continued)
Image on display is			Condition is normal for PowerBook 100 screen.
not uniform
Display stopped			If temperature (under 5° C or over 45° C) or light was extreme
working (or dimmed)			when problem occurred, condition is normal for PowerBook 100
but shows no			screen.
problems now

	Troubleshooting		Symptom Charts/Video (Continued) - 12
		Video (Continued)
Backlight doesn’t		1	Adjust screen brightness setting.
operate		2	Verify interconnect-cable-to-motherboard connection.
		3	Replace inverter board.
		4	Replace interconnect cable.
		5	Replace interconnect board.
		6	Replace display.
		7	Replace daughterboard.
		8	Replace motherboard.
Slight white line is		Condition is normal for PowerBook 100 screen.
always in middle of
screen.

Troubleshooting Symptom Charts/Hard Drive - 13

Hard Drive

Internal hard drive	1	Verify that all external SCSI devices connected to computer
does not operate		are switched on.
	2	Verify that hard drive flex cable is securely connected at both
		ends.
	3	Use “HD SC Setup” to see if drive is visible to program. If it
		is visible, update SCSI driver.
	4	Reinstall system software.
	5	Replace hard drive flex cable.
	6	Replace hard drive.
	7	Replace motherboard.
	8	Replace daughterboard.

Troubleshooting	Symptom Charts/Hard Drive (Continued) - 14
	Hard Drive (Continued)

Hard drive is slow to respond or screen goes blank too often

Adjust sleep delays in Control Panel or connect AC adapter.

Troubleshooting Symptom Charts/Peripheral - 15

Peripheral

After you connect	1	Switch on external SCSI device before starting up computer.
external SCSI device,	2	Verify that Apple HDI-30 SCSI system cable is connected to
computer no longer		computer and external SCSI device(s).
boots	3	Verify that cable termination is correct.
	4	Verify that no SCSI devices have same device address.
	5	Replace motherboard.
	6	Replace daughterboard.
Cursor does not move	1	Reset computer.
when you move	2	Verify trackball-assembly-to-motherboard connection.
trackball	3	Replace trackball assembly.
	4	Replace daughterboard.
	5	Replace motherboard.

		Troubleshooting		Symptom Charts/Peripheral (Continued) - 16
			Peripheral (Continued)
Cursor intermittently			1	Clean trackball ball and internal rollers.
does not move or			2	Replace trackball assembly.
moves erratically
Cursor does not move			1	Verify that mouse is connected to ADB port.
when you move mouse			2	Reset computer.
			3	Clean mouse ball and inside of mouse.
			4	Replace mouse.
			5	Replace motherboard.
			6	Replace daughterboard.

		Troubleshooting		Symptom Charts/Peripheral (Continued) - 17
			Peripheral (Continued)
Cursor moves, but			1	Verify trackball-assembly-to-motherboard connection.
clicking button has no			2	Replace trackball assembly.
effect			3	Replace daughterboard.
			4	Replace motherboard.
No response to any			1	Reset computer.
key on keyboard			2	Connect AC adapter and restart computer in three or four
				minutes.
			3	Install known-good, charged main battery. If computer
				works, replace main battery.
			4	Verify that keyboard cable is securely connected to
				motherboard.
			5	Replace keyboard.
			6	Replace daughterboard.
			7	Replace motherboard.

		Troubleshooting		Symptom Charts/Peripheral (Continued) - 18
			Peripheral (Continued)
Known-good			1	Verify that system software is 7.0.1 or later.
ImageWriter,			2	Verify that Chooser setting is correct.
ImageWriter II, or LQ			3	Verify that printer cable is securely attached.
does not print			4	Replace printer cable.
			5	Replace motherboard.
			6	Replace daughterboard.
Known-good			1	Verify that system software is 7.0.1 or later.
LaserWriter does not			2	Verify that Chooser setting is correct.
print			3	Verify that all printer cables are securely attached.
			4	Connect computer to another printer. If printer works, refer
				to Networks and Communications manual.
			5	Replace motherboard.
			6	Replace daughterboard.