Digital VENTURIS Pentium Service Maintenance Manual EK-A0814-SV Rev B01

This Service Maintenance Manual, published in February 1996, is a comprehensive guide for A+ certified engineers servicing the Digital VENTURIS Pentium line of personal computers. It covers various VENTURIS Pentium models (including 560, 575, FP575, and 575 E) and their hardware features, such as microprocessor speeds (60-133 MHz), Plug and Play, Advanced Power Management, onboard video, and cache configurations.

The document provides detailed instructions on system utilities and configuration, including:

• BIOS Management: How to upgrade/restore BIOS using PHLASH.EXE, create crisis recovery diskettes, and configure settings via the BIOS Setup Utility (covering boot options, fixed disk setup, keyboard features, memory/cache options, advanced chipset control, integrated peripherals, large disk access mode, power options, and security settings).
• Video Drivers: Installing and configuring video drivers (SMTR.EXE for monitor type, SMODE.EXE for non-standard VGA modes) for DOS, Windows 3.x, and CAD applications.

A significant portion of the manual is dedicated to service procedures, emphasizing safety requirements (ESD precautions, high voltage warnings) and recommended tools. It details how to unlock and remove the computer cover, identify internal components in Slimline and Full Profile models, understand expansion slots (ISA/PCI configurations), and set main logic board jumpers (for CPU clock, core/bus frequency, recovery, CMOS, voltage regulation). Memory configurations for different board versions are also extensively covered, including SIMM socket locations and installation rules. Step-by-step instructions are provided for the removal and replacement of various parts, such as diskette drives, the main logic board, power supply, CPU, video memory, and the Real-Time Clock/Lithium Battery, with critical warnings for correct installation. Connecting diskette and IDE devices is also explained, with an emphasis on correct cable orientation.

Troubleshooting is thoroughly addressed, outlining initial procedures, beep codes, and POST/boot messages with solutions for common errors related to memory, disk drives, keyboards, and monitors. It also includes a list of QAPlus/FE error messages and their corresponding solutions.

Finally, the manual includes device mapping information (CPU memory address, I/O address, interrupt levels, and DMA channel assignments) and defines pass/fail criteria for system acceptance tests, encompassing POST, QAPLUS/fe diagnostics, and operating system bootstrap. Appendices provide service notes and useful information resources, such as related documentation and online bulletin boards for technical support and drivers.