1.1 Features
1 Hardware Overview
1-2
Libretto 50CT/70CT Maintenance Manual
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Parallel port
A Centronics compatible parallel port on the I/O adapter enables connection of a
printer or other parallel device and supports the Extended Capabilities Port (ECP)
conforming to IEEE-1284.
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Serial port
A standard, 9-pin, serial port only on the I/O adapter enables connection of such serial
devices as a serial printer, mouse, or modem. A Universal Asynchronous
Receiver/Transmitter (UART) is 16550A equivalent.
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External monitor port
The port is available only on the I/O adapter and enables connection of an external
SVGA compatible monitor.
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PC card slot
A PC card slot accommodates one 5mm card (Type II). The slot supports PCMCIA
Release 2.01 cards and an optional external FDD.
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Docking interface port
A 132-pin, docking interface port enables connection of the I/O port adapter or an
optional Enhanced Port Replicator.
The Enhanced Port Replicator has one additional PC card slot that accommodates a
10.5mm card (Type III) and duplicates the ports available on the I/O adapter, in
addition to the connection of the PS/2 compatible mouse and keyboard.
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AccuPoint
The pointer control stick, located on the right of the display panel, provides
convenient control of the cursor without requiring desk space for a mouse.
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Infrared port
An Infrared Data Association (IrDA) 1.0 standard infrared port, which enables
cableless 115.2Kbps data transfer.
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Sound system
A Sound Blaster Pro compatible, 16-bit sound system enables the computer to play
back sound. The sound system is equipped with a built-in speaker and stereo
headphone jack.
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External Floppy Disk Drive (FDD)
(Option)
A 3.5-inch external FDD is connected to the PC card slot and accommodates both
2HD (1.44MB) and 2DD (720KB) disks.
Summary of Contents for Libretto 50CT
Page 8: ...viii Libretto 50CT 70CT Maintenance Manual ...
Page 10: ...Chapter 1 Hardware Overview ...
Page 11: ...1 ii Libretto 50CT 70CT Maintenance Manual ...
Page 30: ...Chapter 2 Troubleshooting Procedures ...
Page 31: ...2 ii Libretto 50CT 70CT Maintenance Manual ...
Page 61: ...Chapter 3 Tests and Diagnostics ...
Page 62: ...3 ii Libretto 50CT 70CT Maintenance Manual ...
Page 64: ...3 iv Libretto 50CT 70CT Maintenance Manual 3 22 2 Operations 3 45 ...
Page 128: ...Chapter 4 Replacement Procedures ...
Page 129: ...4 ii Libretto 50CT 70CT Maintenance Manual ...
Page 167: ...Appendices ...
Page 168: ...App ii Libretto 50CT 70CT Maintenance Manual ...
Page 178: ...Appendix B Board Layout B 4 Libretto 50CT 70CT Maintenance Manual ...
Page 183: ...Appendix C Pin Assignments Libretto 50CT 70CT Maintenance Manual C 5 ...
Page 186: ...Appendix Appendix C Pin Assignments C 8 Libretto 50CT 70CT Maintenance Manual 43 GND 44 NC ...
Page 194: ...Appendix F BIOS Rewrite Procedures F 2 Libretto 50CT 70CT Maintenance Manual ...
Page 196: ...Appendix G Reliability G 2 Libretto 50CT 70CT Maintenance Manual ...