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Maintenance & Service Guide
Presario 7900 Series Personal Computers
Models: 7922, 7930, 7935, 7940, 7947, 7950, 7970, 7973, 7985

MSG Index Product Description Troubleshooting Illustrated Parts
Home Removal & Replacement Jumpers & Switches Specifications

Specifications

Compaq Presario 7900 Series Personal Computer specifications are listed in the following tables. Select the specification you are interested in from the navigation bar.

Specifications
System Specifications
Video Memory
System Interrupts
System I/O
System Memory
System DMA
Power Supply
Diskette Drive
DVD Drive
IDE Hard Drives
Mouse
Fax/Modem
CD-RW Drive

 

IDE Hard Drives

  13 GB 13 GB 17 GB 20 GB 20 GB  
Compaq Part Number 168030-001 123635-001 168591-001 168031-001 157403-001  
Formatted Capacity
Physical (MB)
Logical (MB)

13021
8455

13520
8455

17020
8455

20020
20020

20020
8455
 
Transfer Rate
Head (Mbits/sec)
Interface (Mbytes/sec)

285.5
66

323
66

285
66

148.8-241.9
66

323
66
 
Typical Seek Time
(including settling)
Single Track (mS)
Average (mS)
Full Stroke (mS)


2.1
10.9
25.0


0.9
7.6
14.2


2.1
10.9


1.5
11.0
18.0


0.9
7.6
14.2
 
Disk Rotational Speed (RPM) 5400 7200   5400 7200  
Cylinders
Physical
Logical

17499
16383

15399
16383


15957
16383

15399
16383
 
Data Heads
Physical
Logical

3
16

4
16


6
16

6
16
 
Sectors per Track
Physical
Logical

342-590
63

316-508
63


307-512
63

316-508
63
 

 

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Mouse

  U. S. Metric
Dimensions
Height
Length
Width

1.48 in
4.76 in
2.44 in

37.5 mm
120.8 mm
62.0 mm
Weight 6.1 oz 131 g
Base Resolution 400 DPI  
Tracking Speed (maximum) 10 in/sec 25 cm/sec
Temperature
Operating
Storage

32
° F to 104° F
-4
° F to 140° F

0
° C to 40° C
-20
° C to 60° C
Lifetime
Mechanical
Switch

Exceeds 300 miles
Exceeds 1 million operations

Exceeds 483 km
Exceeds 1 million operations
Relative Humidity 10% to 90%, noncondensing
ESD
No soft errors through 10 kV;
No hard errors through 15 kV;
specific performance depends on host system

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Fax/Modem

Conexant HCF V.90 56K Data Fax PCI Modem Supra Express 56i PRO 1.5Mb DSL
Maximum Data Speed (kbps) 56* 56* 56*
Data V.90, K56Flex, V.34, V.32terbo, V.32bis, V.32, V.22bis, V.22, V.21, Bell 212A, Bell 103 V.90, K56Flex, V.34, V.32terbo, V.32bis, V.32, V23, V.22bis, V.22, V.21, Bell 212A, Bell 103 V.90, K56Flex, V.34, V.32terbo,V.32bis,
V.32, V.22bis, V.22, V.23, V.21, Bell 212A, Bell 103
Error Correction V.42bis,V.42, LAPM, and MNP 2-5 V.42, LAPM, and MNP 2-4 V.42 and MNP2-4
Fax V.17 (14.4 kbps transmission speed) V.29, V.27ter, V.21 Channel 2, Class 1 command set, Group III FAX V.17 (14.4 kbps transmission speed) V.29, V.27ter, V.21 Channel 2, Group III FAX, Class 1 interface V.17 (14.4 kbps transmission speed) V.29, V.27ter, V.21 Channel 2, Group III, Class 1 interface
* Both K56flex and V.90 are designed only to allow faster downloads from either K56flex or V.90 compliant digital sources. Maximum achievable download transmission rates are currently unknown, may not reach 56kbps, and will vary with line conditions.

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CD-RW Drive

Dimensions U. S. Metric

Width
Height
Depth

Weight
Applicable Read-Only Disc
CD-ROM Mode 1
CD-ROM XA Mode 2, Form 1 and Form 2
CD Digital Audio
CD Extra
CD-I
CD-I Ready
Mode 2, Form 1 and Form 2
Photo CD Single and Multi Session
Video CD
Block Size (Read-Only Disc Parameters)
CD-R Mode 1 2048, 2352 bytes
CD-R Mode 2, Form 1 2048, 2328, 2336, 2340, and 2352 bytes
CD-R Mode 2, Form 2 2328, 2336, 2340, and 2352 bytes
CD-DA 2352 and 2368 bytes
Applicable Writeable Disc
CD-ROM Mode 1
CD-ROM XA Mode 2, Form 1 and Form 2
CD Digital Audio
CD-I Mode 2, Form 1 and Form 2
Video CD
CD-Text
Block Size (Writeable Disc Parameters)
CD-RW Mode 1 2048 bytes
CD-RW Mode 2, Form 1 2048 and 2352 bytes
CD-RW Mode 2, Form 2 2352 bytes
CD-DA 2352 bytes
Center Hole 15 mm diameter
Diameter 12 cm, 8 cm
Thickness 1.2 mm
Track Pitch 1.6 µm
Laser
Access Time

Random
Full Stroke

150 ms (typical)
350 ms (typical)
Audio Output Level

Line Out
Headphone

1.0 V (RMS) at 47 kW
0.7 V (RMS) at 32 W
Cache Buffer 1 Mbyte (minimum)
Sustained Data Transfer Rate

  • 300 KB/s (2X) CD-ROM, CD-R, CD-RW Read, CD-R, CD-RW Write
  • 600 KB/s (4X) CD-ROM, CD-R, CD-RW Read, CD-R Write
  • Variable 1500 to 3600 KB/s (10X to 24X) CD-ROM, CD-R Read
Interface Cable Length (Max) 18 in
Startup Time < 7 sec (single, typical)

< 30 sec (multisession, typical)

Stop Time < 4 sec

 

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