Lc Iilc Ill Quadra

1 Disconnect the floppy drive cable from the connector on the logic board. 2 Release the two latches at the rear of the floppy drive and remove the drive from the case. Replacement Note Before you install a replacement auto-inject 1.4 MB SuperDrive, you must remove the dust shield, if present. encounter either an Apple SuperDrive or a manual eject floppy drive in some models. Replace floppy drives like for like.

Memory

DRAM LC 2 MB, expandable to 10 MB (100 ns or faster SIMMs) LC II 4 MB standard, expandable to 10 MB (100 ns or faster SIMMs) LC III 4 MB standard, expandable to 36 MB (80 ns or faster SIMMs) LC 475 Quadra 605 4 MB or 8 MB standard, expandable to 36 MB (80 ns or faster SIMMs) LC III LC 475 Quadra 605 512K expandable to 1 MB LC II 256K VRAM SIMM, upgradable to 512K LCIII 512K VRAM on board, upgradable to 768K LC 475 Quadra 605 Two 256K VRAM SIMMs, upgradable to 1MB

Floppy Drive

Before you begin, remove the top cover. Caution Review the ESD precautions in Bulletins Safety. 1 Disconnect the floppy drive cable from the connector on the logic board. Note Retain the old floppy drive cable. Use the old cable on the new exchange module. 2 Release the two latches on one side of the drive and lift the drive slightly. Repeat on the other side and remove the drive from the case. Replacement Note Before you install a replacement 1.4 MB SuperDrive, you must remove the dust shield.

Power Supply

Before you begin, remove the top cover. Caution Review the ESD precautions in Bulletins Safety. 1 Disconnect the power supply cable from the connector on the logic board. 2 Release the two latches that secure the front end of the power supply to the bottom case, and lift the power supply out of the case.

Logic board

Card in the PDS slot (if any) Caution Review the ESD precautions in Bulletins Safety. Note The Macintosh Processor Upgrade kit allows 68LC040 computers to switch between a PowerPC 601 processor and a 68LC040 processor. The upgrade board includes the PowerPC 601 processor on board and a socket to accept the customer's 68LC040 processor. Note Refer to the Macintosh Processor Upgrade manual under the Power Macintosh menu for information about specifications and troubleshooting. Note The Macintosh...

Battery Verification

Before you begin, remove the top cover. Caution Review the ESD precautions in Bulletins Safety. Awarning If handled or discarded improperly, the lithium battery in the computer could explode. Review battery handling and disposal instructions in Bulletins Safety. 1 Set the voltmeter to the 10 volts DC scale. 2 Hold the positive probe of the voltmeter to the positive end of the battery and the negative probe to the negative end of the battery. 3 If the battery voltage is below 3.0 volts, replace...

Fan Speaker Assembly LC

Before you begin, remove the top cover. Caution Review the ESD precautions in Bulletins Safety. 1 Release the latch on one end of the fan speaker assembly, and lift the assembly slightly. 2 Release the other latch and remove the fan speaker assembly from the bottom case. Before you begin, remove the top cover. Caution Review the ESD precautions in Bulletins Safety. 1 Disconnect the fan cable from the fan connector on the logic board. 2 Release the plastic latches and lift the fan from the case....

IO Interfaces

Two RS-232 RS-422 serial ports mini DIN-8 connectors Apple Desktop Bus One ADB port mini DIN-4 connector One DB-15 monitor port for built-in video DA-15 connector LC LC II LC III Mono sound input and output port mini phono plug LC 475 Quadra 605 Mono sound input port stereo output mini phono plug LC 96-pin processor-direct slot (PDS) supporting 020 direct slot expansion card LC II 96-pin PDS supporting 020 030 direct slot expansion card LC III 114-pin PDS supporting 020 030 direct slot...

Miscellaneous Continued

1 Verify 10Base-T cable is secure. 2 Replace 10Base-T adapter card. 3 Remove additional RAM and external SCSI devices. 1 Replace battery. See Battery Replacement in Additional Procedures. 3 Verify nothing is connected to sound-out port. 4 Replace logic board. Retain customer's SIMMs. System doesn't recognize more than 10 MB of RAM (LC LC II) Although you can install up to12 MB of RAM in Macintosh LC LC II computers, 10 MB is the maximum amount of RAM that the system recognizes.

Battery Replacement

Before you begin, remove the top cover. Caution Review the ESD precautions in Bulletins Safety. Awarning If handled or discarded improperly, the lithium battery in the computer could explode. Review battery handling and disposal instructions in Bulletins Safety. 1 Insert a small flat-blade screwdriver into the top of the holder and gently push the screwdriver down until the side tab pushes out. 2 Repeat on the other end and remove the cover from the holder. Grasp the battery and remove it from...

Replacement Note

Imac Lvds Pinouts

LC 475 and Quadra 605 use the same logic board replacement. The Quadra 605 requires a jumper to connect the pins at location J1 8. Quadra 605 service replacement logic boards do not include the jumper. Install a jumper on the pins at location J1 8 on the Quadra 605 service replacement logic board

Sound and Video

Sound Monaural, 8-bit sound input at 11 or 22 kHz LC, LC II, LC III Monophonic, 8-bit sound generator supplying same signal to both channels of stereo equipment LC 475 and Quadra 605 Stereo output capability Video LC and LC II provide built-in support for many monitors, Apple High-Resolution Monochrome Monitor AppleColor High-Resolution RGB Monitor Macintosh 12-Inch RGB Display Macintosh 12-Inch Monochrome Display LC III, LC 475 and Quadra 605 provide up to 16-bit support on 12-, 13-, and...

Fan For Macintosh Quadra 605

Caution Review the ESD precautions in Bulletins Safety. Note A Macintosh LC 475 upgrade kit upgrades a Macintosh LC II or III to a Macintosh LC 475. The upgrade kit includes a Macintosh LC 475 logic board and product ID labels. Note The upgrade kit does not include a connecting grounding spring. You must order this part separately. Before installing the upgrade logic board, install the connecting grounding spring on the audio ports of the board, with the arms of the spring facing out. 2 Install...

LC II Upgrade

Before you begin, remove the following Caution Review the ESD precautions in Bulletins Safety. Note A Macintosh LC II upgrade kit upgrades a Macintosh LC to a Macintosh LC II. The upgrade kit includes a Macintosh LC II logic board and cover. 1 Install the Macintosh LC II logic board. 2 Install the customer's SIMMs into the new logic board. Replacement Note After replacing the fan speaker assembly, install the Macintosh LC II top cover. Make sure that the connections to the sound-out and sound...

Builtin Video

Screen is dark, audio and at least one drive operate, fan runs, and LED is lit 1 Adjust brightness on monitor. 2 Try monitor with another Macintosh computer. 4 Replace monitor. Troubleshoot defective monitor. See Symptom Charts in appropriate monitor manual. 7 Replace logic board. Retain customer's SIMMs. Screen is dark, audio and drive do not operate, but fan runs and LED is lit 1 Remove expansion card, if present. 3 Disconnect hard drive and floppy drive. 4 Replace SIMMs. Refer to Memory...

Peripherals

Works with internal or external SCSI device but does not work with both 1 Verify that SCSI select switch on external device is set to different priority from internal. 2 Verify that both ends of external SCSI device are terminated. 3 Replace terminator on external device. 4 Verify that terminator is installed on internal SCSI drive. 3 If mouse was connected to keyboard, connect mouse to rear ADB port and disconnect keyboard. If mouse works, replace keyboard. 4 If mouse does not work in any ADB...

LC to Lc Iii Upgrade

Before you begin, remove the following Caution Review the ESD precautions in Bulletins Safety. Note A Macintosh LC III upgrade kit includes LC III logic board, bottom case, top cover, power supply, speaker, fan, and floppy drive carrier. Note You will use only a few parts from the original LC in upgrading an LC to an LC III. The following procedures explain how to remove the LC parts and install them into the LC III upgrade unit. 1 Remove the Macintosh LC floppy drive and floppy drive cable....

Error Chords

2 Perform SIMM verification on replacement logic board. 3 Replace logic board. Retain customer's SIMMs. 2 Perform SIMM verification on replacement logic board. 3 Replace logic board. Retain customer's SIMMs. Error chord sounds during startup Macintosh LC Eight-tone error chord sounds during startup LC II III 475 Quadra 605 Four-tone error chord sounds during startup Macintosh LC II Disconnect hard drive power cable and hard drive data cable and reboot system. If startup sequence is normal, run...

LC Ethernet Upgrade

Expansion Connector

Before you begin, remove the top cover. Caution Review the ESD precautions in Bulletins Safety. Note The finished goods LC Ethernet Card package includes the LC Ethernet Card and standoffs. If you order service parts, you must order the standoffs separately from the card. 1 Insert the short standoff in the hole on the corner near the connector end of the card. 2 Insert the long standoff in the hole on the center edge of the card. Caution Failure to install the standoffs can cause the computer...