Personal Computer Maintenance & Service Guide
Table Of Contents
- NOTICE
- CONTENTS
- ABOUT THIS GUIDE
- PRODUCT DESCRIPTION
- SPARE PARTS
- REMOVAL AND REPLACEMENT PRELIMINARIES
- REMOVAL AND REPLACEMENT PROCEDURES
- 4.1 Disassembly Sequence Chart
- 4.2 Disassembly Preparation
- 4.3 Feet Installation
- 4.4 Logo Plate
- 4.5 Cable Lock
- 4.6 Access Panel
- 4.7 Front Bezel
- 4.8 Power Button
- 4.9 Subpanel and Bezel Blanks
- 4.10 Power Switch
- 4.11 Mass Storage Devices
- 4.12 Removing the Drivelocks
- 4.13 Expansion Boards
- 4.14 Board Guide
- 4.15 System Memory
- 4.16 AGP Graphics Board (440BX)
- 4.17 Processor Components
- 4.18 System Board
- 4.19 Internal Speaker
- 4.20 Lithium Battery
- 4.21 Fan Assembly
- 4.22 Power Supply
- 4.23 Converting a Desktop to a Minitower
- 4.24 Converting a Minitower to a Desktop
- CONNECTORS, JUMPERS, AND SWITCHES
- SPECIFICATIONS
- SERVICE NOTES
- INDEX
6-12 Specifications
6.6 Audio Controllers
440BX 440BX
ESS 1869 ISA 16-bit full
duplex audio with Compaq
Premier
!
Sound
Creative Labs SoundBlaster
128V PCI with Compaq
Premier
!
Sound.
Sampling rate
4 kHz to 48 kHz (adjustable) 48 kHz
Full Scale Input Voltage (rms)
Microphone-In
Line-Input
0.050
1.0
0.1
2.0
Full Scale Output Voltage (rms)
Line Output
1.0 2.35
Dynamic Range (DR)
Digital Playback
Digital Record
81 dB
77 dB
89 dB
87 dB
Total Harmonic Distortion + Noise
Digital Playback
Digital Record
-65 dB
-65 dB
-80 dB
-82 dB
Frequency Response (-3 dB cutoffs)
Line Level (48 kHz)
Speaker
20 Hz to 20,000 Hz
200 Hz to 15,000 Hz
20 Hz to 20,000 Hz
200 Hz to 15,000 Hz
Crosstalk (dB)
Line Output
63 dB 92 dB
Impedance (nominal)
Microphone-In
Line-Out
100-k ohms
5-k ohms
10 Kohms
10 Kohms
Data Types
PCM
A-Law
ยต-Law
8-/16-bit (mono/stereo)
8-/16-bit (mono/stereo)
16-bit (mono/stereo)
8-/16-bit (mono/stereo)
8-/16-bit (mono/stereo)
8-/16-bit (mono/stereo)