Dell OptiPlex 990 - Internal Speaker Service; Removing the Internal Speaker

DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK —VERSION 1.5
23
AUDIO
COMMUNICATIONS - NETWORK ADAPTER (NIC)
NOTE: MT supports full height (FH) cards and DT and SFF supports low profile (LP) cards.
INTEGRATED REALTEK ALC269Q HIGH DEFINITION AUDIO
MT DT SFF USFF
High Definition Stereo support X X X X
Number of channels 2
Number of Bits / Audio resolution 16, 20, and 24-bit resolution
Sampling rate (recording/playback) Support 44.1K/48K/96K/192 kHz sample rates
Signal to Noise Ratio 98 dB DAC outputs, 90 dB for ADC inputs
Analog Audio X X X X
Dolby Digital
THX
Digital out (S/PDIF)
Microphone 40K ohm~60K ohm
Line-In 40K ohm~60K ohm
Line-Out 100~150 ohm
Headphone 1~4 ohm
Internal Speaker Power Rating 2Watt (peak) / 1Watt (average)
Audio Jack Impedance
INTEGRATED INTEL® 82579 GIGABIT1
ETHERNET LAN 10/100/1000
MT DT SFF USFF
External Connector Type RJ45
Data Rates supported 10/100/1000 Mbps
Controller Details
Controller bus architecture
PCIe-based interface for S0 state, SMBus for Sx
low power state
Integrated memory N/A
Data transfer mode (example Bus-Master DMA) N/A
Power consumption (full operation per data rate connection speed) 711mW (Max.)
Power consumption (standby operation) 227mW (Max.)
IEEE standards compliance (example 802.1P) 802.3
Hardware Certifications (example FCC, B, GS mark…) N/A
Boot ROM Support EEPROM (located in SPI)
Network Transfer Mode (example Full Duplex, Half Duplex)
Network Transfer Rate (example 10BASE-T (half-duplex) 10 Mbps
10BASE-T (full-duplex) 20 Mbps
100BASE-TX (half-duplex) 100 Mbps
100BASE-TX (full-duplex) 200 Mbps
1000BASE-T (full-duplex) 2000 Mbps
10 Mb (full/half-duplex)
100 Mb (full/half-duplex)
1000 Mb (full-duplex)