Main Battery

Before you begin, remove the rear cover. Review the ESD precautions in Bulletins Safety. Caution The main battery is a sealed, lead-acid battery that contains toxic materials. Review battery handling and disposal instructions in Bulletins Safety. 1 Press the two plastic tabs at the front of the battery cover and slide the battery cover toward the rear of the computer. Caution You must reinstall the battery cover if you are doing anything other than replacing the main battery. Failure to...

Backlit Display Upgrade

Before you begin, remove the following Caution Review the ESD precautions in Bulletins Safety. Caution Remember to replace the battery cover after removing the main battery. Failure to reinstall the cover leaves power connected to the logic board. Removing and replacing modules with power available could damage new and old modules. Caution If a RAM disk is present, be sure to save its contents before beginning the backlit display upgrade. Otherwise, the contents of the RAM disk will be lost. 1...

Power Continued

After main battery is removed, some Control Panel settings are different Did you replace battery cover after removing main battery If so, power interruption destroyed settings. Restore contents of Control Panel. Replace backup battery. plugged in and 2 connected battery DA 3 does not indicate 4 charger is connected Verify that charger is connected properly. Replace main battery. Replace power adapter. Replace logic board. Retain customer's SIMMs.

Backup Battery

Before you begin, remove the following Caution Review the ESD precautions in Bulletins Safety. Note Removing the backup battery erases the contents of parameter RAM. Before removing the backup battery, be sure to note all the Control Panel settings so you can restore them after completing your repairs. 1 Using the tip of a jeweler's screwdriver, lift the edge of the backup battery far enough to grab the battery with your fingers. Remove the battery from its compartment. 2 Disconnect the battery...

Logic Board

Before you begin, remove the following Caution Review the ESD precautions in Bulletins Safety. Caution Remember to replace the battery cover after removing the main battery. Failure to reinstall the cover leaves power connected to the logic board. Removing and replacing modules with power available could damage any modules. Input device cable from J1 3 Input device cable from J20 Lower floppy drive cable from J1 4 Upper floppy drive cable from J1 5 Caution Do not lift the subframe too far....

Hard Drive Installation

Disconnect the power adapter Caution Review the ESD precautions in Bulletins Safety. Caution Remember to replace the battery cover after removing the main battery. Failure to reinstall the cover leaves power connected to the logic board. Removing and replacing modules with power available could damage new and old modules. Note The minimum configuration of the Macintosh Portable includes a single internal floppy drive. The Portable can be upgraded to include an internal 40 MB hard drive. This...

Hard Drive

J19 Connector Logic Board Imac

Before you begin, remove the following Caution Review the ESD precautions in Bulletins Safety. Caution Remember to replace the battery cover after removing the main battery. Failure to put the cover on leaves power connected to the logic board. Removing and replacing modules with power available could damage any module. 1 Disconnect the following cable connectors from the logic board 2 Close the display and move the hard drive cable toward the rear of the computer. 3 Caution Do not loosen or...

Keyboard Cover

No preliminary steps are required before you begin this procedure. Review the ESD precautions in Bulletins Safety. 1 Push the carrying handle toward the computer and open the display. 2 Position the computer upright on the rear panel. 3 Insert the tip of a screwdriver under the center of each foot gently lift the foot away from the case and remove it. Insert a jeweler's screwdriver into the center hole at the top-right corner of the bottom case. Push in the screwdriver and unsnap the corner of...

Display Assembly

Apple Imac

Before you begin, remove the following Caution Review the ESD precautions in Bulletins Safety. Caution Remember to replace the battery cover after removing the main battery. Failure to reinstall the cover leaves power connected to the logic board. Removing and replacing modules with power available could damage any modules. Disconnect the display cable from connector J1 9 on the logic board. Twist the left clutch cover back and forth and pull it away from the display. Lift and remove the left...

Internal Modem

Internal modem options do not appear in Portable CDEV when modem is installed Modem does not respond properly to AT instructions 3 Replace logic board. Retain customer's SIMMs. 1 Verify that baud rate and data format settings of communications application are compatible with Portable Data Modem 2400 and remote modem. 2 Replace logic board. Retain customer's SIMMs.

Video Continued

Use Control Panel to adjust screen contrast. Move computer closer to direct light or move light source closer to computer. Use Control Panel to adjust screen contrast. Replace LCD display. Replace logic board. Retain customer's SIMMs. Use Control Panel to adjust screen contrast. Display is blank, though computer appears to operate correctly

RAM Expansion

Before you begin, remove the following Caution Review the ESD precautions in Bulletins Safety. Caution Remember to replace the battery cover after removing the main battery. Failure to reinstall the cover leaves power connected to the logic board. Removing and replacing modules with power available could damage new and old modules. Note Static and pseudostatic RAM expansion cards are available for the Macintosh Portable. Static and pseudostatic RAM cards are not interchangeable. The 1 MB RAM...

Battery Verification

Macintosh Portable Battery

Before you begin, remove the following Caution Remember to replace the battery cover after removing the main battery. Failure to reinstall the cover leaves power connected to the logic board. Removing and replacing modules with power available could damage new and old modules. 1 Set the voltmeter range to 10 volts DC. Touch and hold the positive probe to the positive side of the battery. Touch and hold the negative probe to the negative side of the battery. If the reading is less than 5.7...

Sound and Video

One-or four-voice mono one or two voices in stereo with 4-bit digital-to-analog conversion using a 22-kHz sampling rate Filtered by two Sony sound chips Video Display 10-in. diagonal screen Reflective, active-matrix, liquid crystal, flat-panel display 640 by 400 pixels, 75 dpi .28 mm dot size .33 mm dot pitch 80 active area Variable tilt Contrast nonbacklit display and brightness backlit display is software adjustable using the Control Panel.

Trackball Maintenance

No preliminary steps are required before you begin this procedure. Caution Review the ESD precautions in Bulletins Safety. Caution Remember to replace the battery cover after removing the main battery. Failure to reinstall the cover leaves power connected to the logic board. Removing and replacing modules with power available could damage any modules. counterclockwise as far as it will go and remove the retainer and trackball. Gently blow dust from inside the trackball assembly. Using a cotton...