Battery Handling

No preliminary steps are required before you begin this procedure. Note The PowerBook Duo main battery is a nickelmetal-hydride (NiMH) battery. To extend its longevity, follow the instructions below. Awarning Return undamaged, dead NiMH batteries to Apple do not discard dead batteries with other waste. If the battery is damaged, do not return it to Apple. Dispose of damaged batteries according to local ordinances. Review battery handling and disposal instructions in Bulletins Safety. Note To...

Display Assembly and CPU Stiffener

Disconnect the power adapter Remove the end clutch covers Caution The PowerBook Duo contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Caution PowerBook Duo cables are fragile and easily torn or damaged. Handle all cables with care. Important Follow this procedure only when removing the logic board and case bottom. In all other cases, remove the display assembly and CPU stiffener...

Self Threading Screws

Caution Improperly installed self-threading screws could damage the PowerBook Duo. Thread the screws properly and do not overtighten them. Caution To prevent damage to the circuitry, do not use magnetic screwdrivers when working on Apple systems. The PowerBook 200 systems use both machine screws and self-threading screws. Be aware when you are replacing a self-threading screw, and follow these guidelines Never overtighten self-threading screws. Before tightening a self-threading screw, back the...

Top Case

Disconnect the power adapter Remove the end clutch covers Caution The PowerBook Duo contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Caution The top case is secured to the chassis by a snap at the left corner of the case and by four interlocking tabs along the front. Failure to unlock the four interlocking case tabs could damage the top case. 1 Raise the bottom left corner of the top...

Display Assembly

Disconnect the power adapter Remove the end clutch covers Remove the center clutch cover Note This topic includes procedures for removing the Duo 210 230 250 280 display assembly. CPRC and International repairers See 270c 280c topics for removing the Duo 270c 280c display assembly. Note The PowerBook Duo 250, 270c, 280, and 280c display assemblies are available to CPRC and international repairers only. Caution PowerBook cables are fragile and easily torn or damaged. Handle all cables with...

Cc Inverter Board

Disconnect the power adapter Remove the end clutch covers Remove the center clutch cover Remove the 270c 280c display housing Caution The PowerBook Duo contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Note The PowerBook Duo 270c and 280c active-matrix display modules are available to CPRC and international repairers only. 1 Using a T-8 torx driver, remove the inverter board mounting...

Ft

PB Duo Battery Contact Alignment Tool Note Perform the battery contact alignment procedure when you replace a PowerBook Duo logic board or when a known-good battery has power problems. Use the Duo battery contact alignment tool to align the two outer battery contacts so they are perpendicular to the edge of the logic board. 1 Slide the Duo battery contact alignment tool into the battery bay. Note If leads 1 or 5 flex or offer resistance to the alignment tool, perform the following steps. If...

Rear Cover IO Door

Disconnect the power adapter Remove the end clutch covers Remove the center clutch cover 1 Close, latch, and turn over the computer. Remove the three case screws that secure the keyboard to the bottom case. Don't overtighten the keyboard screws. Overtightening could warp the keyboard and restrict key movement. After replacing the screws, always check the keys and space bar to make sure they work. 2 Remove the two screws and the display mounting clips. Note Removing the keyboard case screws,...

C Upgrade

Disconnect the power adapter Remove the end clutch covers Remove the center clutch cover Remove the trackball assembly Remove the display assembly Caution The PowerBook Duo contains CMOS devices that are very susceptible to ESD damage. Review the ESD precautions in Bulletins Safety. Note A PowerBook Duo 270c upgrade kit upgrades a PowerBook Duo 21 0 230 to a PowerBook Duo 270c. The upgrade kit is an assembled PowerBook Duo 270c without the keyboard, trackball, and hard drive. 1 Install the...

Battery Verification

Before you begin, remove the main battery. Note The battery desk accessory is a general indicator of the battery charge. Use a voltmeter to determine the actual charge. undamaged, dead Ni-Hy batteries to Apple do not discard dead batteries with other waste. If the battery is damaged, do not return it to Apple. Dispose of damaged batteries according to local ordinances. Review battery handling and disposal instructions in Bulletins Safety. Set a voltmeter to the 20 volts DC scale. Touch the...

Power Manager Reset

If a unit crashes or experiences power problems, reset the power manager chip by pressing the rear power switch for 30-45 seconds. If resetting the power manager chip does not solve the problem, reset the code for the power manager chip by removing all power sources and letting the unit sit for 10 minutes. Take out the battery and disconnect the AC adapter and the internal backup battery. This forces the PowerBook Duo to reload the power manager code from the system software. RAM failure occurs...

Center Clutch Cover

Logic Board Duo 230

Disconnect the power adapter Remove the end clutch covers Caution Removing the center clutch cover can exert unnecessary wear and tear on the display cable and plastics. Remove the cover only if you are replacing the CPU stiffener, display assembly, or rear cover. Caution When removing the center clutch cover, be careful not to tear the fragile display cable located beneath the clutch cover. Note The center clutch cover is disposable. If you break or cosmetically damage the cover, replace it....

Hard Drive

Disconnect the power adapter Remove the end clutch covers Caution The PowerBook Duo contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Caution PowerBook cables are fragile and easily torn or damaged. Handle all cables with care. 1 Remove the three self-threading screws that secure the hard drive to the CPU stiffener. 2 Using an IC extractor, disconnect the hard drive cable. Replacement...

Electrical

NiMH nickel-metal-hydride , 0.95 Ah Approximately 2-4 hours of usage before recharging depending upon use Recharge time approximately 2 hours 500 power cycles capacity Main Battery 250 NiMH nickel-metal-hydride , 1.5 Ah 270c Approximately 2-3 hours of usage before recharging depending upon use Recharge time approximately 2 hours 500 power cycles capacity Uses 4 5 A size battery cells Approximately 2-3 hours of usage before recharging depending upon use Recharge time approximately 2 hours 500...

Peripherals Continued

Known-good serial printer does not print 1 Verify that System is 7.1 or later. 2 Verify that Chooser and Control Panel settings are correct. 4 Replace printer interface cable. Note When replacing the logic board, check that the EMI clips are securely attached to the CPU stiffener. The CPU Stiffener topic in Take Apart helps you locate and identify the two EMI clips. If both clips are not secure, replace the CPU stiffener.

Trackball

Disconnect the power adapter Remove the end clutch covers Caution The PowerBook Duo contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Caution PowerBook cables are fragile and easily torn or damaged. Handle all cables with care. Trackball Assembly Trackball Cable Remove the two self-threading screws that secure the trackball assembly to the chassis. Using an IC extractor, disconnect the...

Backup Battery

Disconnect the power adapter Remove the end clutch covers Caution The PowerBook Duo contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Caution PowerBook cables are fragile and easily torn or damaged. Handle all cables with care. 1 Remove the backup battery from the trackball assembly. backup battery cable from the logic board.

Memory Expansion

Disconnect the power adapter Caution The PowerBook Duo contains CMOS devices that are very susceptible to ESD damage. Review the ESD precautions in Bulletins Safety. Holding the DRAM expansion card by the edges, connect the card to the logic board. Note To verify that the upgrade is successful, check the Total Memory message for systems with virtual memory switched off or the Built-in Memory message for systems with virtual memory switched on . The memory size should be 4 MB of DRAM plus the...

Floppy Adapter

No preliminary steps are required before you begin this procedure. Note The PowerBook Duo Floppy Adapter attaches to the 1 52-pin docking connector and provides an external floppy drive HDI-20 port and an ADB port. Replace defective floppy adapters by whole unit exchange. To install the floppy adapter, raise the I O door and push the adapter firmly onto the external 152-pin docking port. Make sure the floppy adapter release button is up. To remove the adapter, depress the release button and...

Series Upgrade

RoverBook Duo 2300 Before you begin, do the following to disassemble the PowerBook Duo 200 being upgraded Remove the main battery. Remove the keyboard Remove the end clutch covers Remove the top case. Remove the hard drive Remove the backup battery Remove the display CPU stiffener assembly Remove the microphone cable, on-off board or modem , and optional RAM from the logic board Caution The PowerBook Duo contains CSMOS devices that are very susceptible to ESD damage. Review the ESD precautions...

Keyboard

Powerbook Duo 210 Take Apart

Disconnect the power adapter Jeweler's flat-blade screwdriver Duo battery contact alignment tool Caution The PowerBook Duo contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins Safety. Caution PowerBook Duo cables are fragile and easily torn or damaged. Handle all cables with care. Note If you are removing the keyboard only, you do not need to remove the case screw nearest the front of the unit. 1...

Battery Recharger

Powerbook Duo Battery

No preliminary steps are required before you begin this procedure. 1 Using the PowerBook Duo power adapter, plug the battery recharger into a power outlet and insert the main battery into the recharger. Yellow, the battery is charging Green, the battery is ready to use Red, the battery is Type 2 or Type 3 and the recharger is Type 1 the battery will not charge . Or, the Type 2 recharger has not been updated with software for a Type 3 battery see Note below . Off, the recharger is unplugged, the...