User manual APPLE POWERBOOK 140 SERVICE MANUAL

[. . . ] K Service Source PowerBook 140/145/ 145B/170 PowerBook 140, PowerBook 145, PowerBook 145B, PowerBook 170 K Service Source Basics PowerBook 140/145/145B/170 Basics Overview - 1 Overview This manual includes complete repair procedures for the PowerBook 140, PowerBook 145 and 145B, and the PowerBook 170. Figure: PowerBook 140, 145, 145B, 170 Basics Display Compatibility Matrix - 2 Display Compatibility Matrix Active Matrix PB 170 661-0711 699-0273 630-6273 936-0106 FSTN, Rev. C PB 145/145B 661-0745 922-0025 922-0820 936-0106 Inverter Display Cable Inverter Cable Important: The PowerBook family includes four displays--an active matrix and three FSTN displays. Each of these displays requires a compatible inverter and display cable; the inverters, display cables, and displays are not interchangeable. Before ordering a replacement display, display cable, or inverter, refer to the display matrix. Basics Displays - 3 Displays Each of the four displays requires a compatible inverter and display cable. [. . . ] Review the ESD precautions in Bulletins/ Safety. Trackball Assembly Take Apart 1 Locking Tab Trackball Assembly - 20 Caution: The trackball ribbon cable is fragile and should be handled with care. Trackball Ribbon Cable Pull out the locking tab on the trackball connector and remove the trackball ribbon cable. Take Apart 2 Trackball Assembly - 21 Using a T-8 torx driver, remove the two mounting screws and lift the trackball assembly out of the top case. Take Apart Keyboard - 22 Keyboard Before you begin, remove the following: · Main battery · I/O door · Top case · Trackball assembly Caution: The PowerBook140/145/170 contains CMOS devices that are very susceptible to ESD damage. Review the ESD precautions in Bulletins/ Safety. Keyboard Take Apart 1 Keyboard - 23 Caution: The keyboard ribbon cables are fragile and should be handled with care. Lift up the locking tabs on the two keyboard connectors and remove the keyboard ribbon cables. Keyboard Ribbon Cables Take Apart 2 Keyboard - 24 Using a T-8 torx driver, remove the seven mounting screws and lift the keyboard out of the top case. Take Apart Inverter Board - 25 Inverter Board Before you begin, remove the following: · Main battery · I/O door · Top case Caution: The PowerBook 140/145/170 contains CMOS devices that are very susceptible to ESD damage. Review the ESD precautions in Bulletins/Safety. Inverter Board Take Apart Inverter Board - 26 Important: One activematrix and three FSTN displays are used with the PowerBook 140/145/170 computers. When replacing a display or inverter board, refer to the "Display Compatibility Matrix" in Basics and to Service Source parts database for the correct part number for each board. Take Apart 1 Inverter Shield Inverter Board - 27 If present, remove the inverter shield. 2 Inverter Board Inverter Cable 3 Remove the two screws and pull the inverter board straight up to disconnect it from the interconnect board. Disconnect the inverter cable. Take Apart Inverter Board - 28 Replacement Note: Install inverter shields on all PowerBook 140/145/170 computers. If you are replacing a defective inverter that has an inverter shield installed, order both the inverter board and the inverter shield. Do not reuse the original inverter shield. Take Apart Brightness Pot Contrast Pot Inverter Board Inverter Board - 29 Replacement Note: For systems with FSTN displays, be sure to align the brightness and contrast pots on the inverter board with the plastic actuators on the top case. It is easiest to align the pots and actuators if you set both to their extreme outer positions. Actuator Actuator Take Apart Interconnect Board - 30 Interconnect Board Before you begin, remove the following: · Main battery · I/O door · Top case · Inverter board Caution: The PowerBook140/145/170 contains CMOS devices that are very susceptible to ESD damage. To prevent damage, wear a grounding wriststrap. Review the ESD precautions in Bulletins/ Interconnect Board Take Apart Interconnect Board - 31 Safety. Return bad interconnect boards to Apple for proper disposal. ±Warning: J5 Connector J3 Connector 1 Caution: The keyboard and display ribbon cables are fragile. Lift up the locking tabs on connectors J5 and J3 and remove the keyboard ribbon cables. Take Apart 2 Interconnect Board - 32 Pull out the locking tab on connector J2 and remove the display cable. Ferrite Bead Note: If you also plan to remove the display or the display cable, separate the display cable ferrite bead from the top case. You may need to use a small flatblade screwdriver to pry off the ferrite bead. J2 Connector Replacement Note: Connect the display cable before replacing the interconnect board. Take Apart 3 Interconnect Board - 33 Using a T-8 torx driver, remove the two mounting screws and lift the interconnect board from the top case. Take Apart Actuators - 34 Actuators Before you begin, remove the following: · Main battery · I/O door · Top case · Inverter board Caution: The PowerBook140/145/170 contains CMOS devices that are very susceptible to ESD damage. Review the ESD precautions in Bulletins/ Safety. Actuators Take Apart Actuators - 35 Note: The PowerBook 170 has a brightness actuator only (contrast is preset). Pull up and rotate the actuator toward the display to remove it from the top case. Take Apart Elevation Feet - 36 Elevation Feet Before you begin, remove the following: · Main battery · I/O door · Top case Elevation Foot Caution: The PowerBook 140/145/170 contains CMOS devices that are very susceptible to ESD damage. Review the ESD precautions in Bulletins/Safety. Elevation Foot Take Apart 1 Elevation Feet - 37 Using a T-8 torx driver, remove the torx screw and washer and the spring clip from the inside of the elevation foot. Pull off the elevation foot. Spring Clip 2 Elevation Foot Take Apart Daughterboard - 38 Daughterboard Before you begin, remove the following: · Main battery · I/O door · Top case · RAM expansion card (if present) Daughterboard Take Apart Daughterboard Motherboard Daughterboard - 39 Caution: The PowerBook 140/145/170 contains CMOS devices that are very susceptible to ESD damage. 1 Using a T-8 torx driver, remove the four daughterboard mounting screws. Logic Board Take-Apart Tool Caution: Always use the logic board take-apart tool to separate the daughterboard connector from the motherboard Take Apart Daughterboard - 40 connector. Trying to disconnect the daughterboard from the motherboard by rocking or peeling the boards apart damages the connectors. 2 Using the logic board take-apart tool, disconnect the daughterboard from the motherboard. Note: For tools ordering information, refer to "Special Tools" in Bulletins/Service Notices. Take Apart Motherboard - 41 Motherboard Before you begin, remove the following: · Main battery · I/O door · Top case · RAM expansion card (if present) · Daughterboard · Modem board (if present) Motherboard Take Apart Floppy Drive Cable Thermistor Cable Hard Drive Cable Motherboard - 42 Caution: The PowerBook 140/145/170 contains CMOS devices that are very susceptible to ESD damage. 1 Locking Tab Locking Tabs Caution: The hard drive, floppy drive, and thermistor cables are fragile. Lift up the locking tabs and remove the hard drive, floppy drive, and Take Apart Hex Nut Screw Motherboard - 43 battery thermistor cables. 2 Motherboard Remove the two hex nut screws and lift the motherboard out of the bottom case. Take Apart Clutches/Display Housing - 44 Clutches/Display Housing Before you begin, remove the main battery. Clutch Assembly Take Apart Clutches/Display Housing - 45 1 Screw 2 Remove the two plastic plugs. Plastic Plugs Plastic Plug Using a T-8 torx driver, remove the two bezel mounting screws from the display. Take Apart Clutches/Display Housing - 46 3 Pull the display bezel down and away to release it from the mounting tabs at the top of the display. Lift the bezel off the display. Display Bezel 4 Take Apart Display Housing EMI Shield Clutches/Display Housing - 47 5 Cover the keyboard with a clean cloth or sheet of paper. [. . . ] Note: Do not install a shim onto a display cable that has been stamped with part number 922-0820. Additional Procedures 1 Screw Shim Installation - 17 Remove the two plastic plugs. 2 Plastic Plugs Using a T-8 torx driver, remove the two bezel mounting screws from the display. Plastic Plug Additional Procedures 3 Shim Installation - 18 Pull the display bezel down and away to release it from the mounting tabs at the top of the display. Lift the bezel off the display. Display Bezel 4 Additional Procedures Housing EMI Shield Shim Installation - 19 Note: If you are installing a shim on a PowerBook 170 display cable, skip to step 8. You can disconnect the display cable from the PowerBook 170 display without removing the display from the housing. Using a T-8 torx driver, remove the four display mounting screws. Display 6 Additional Procedures 7 Shim Installation - 20 Remove the display from the EMI shield and housing. [. . . ]