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SERVICE MANUAL FOR
8050
BY: Grass.Ren
Repair Technology Research Department /EDVD
Feb.2004
8050 N/B Maintenance
Contents
1. Hardware Engineering Specification ............................................................................. 3
1.1 Introduce ............................................................................................................. 3
1.2 System Overview .................................................................................................... 6
1.3 System Hardware Parts .............................................................................................. 9
2. System View & Disassembly ...................................................................................... 34
2.1 System View .........................................................................................................
34
2.2 System Disassembly .................................................................................................
37
3. Definition & Location of Connectors / Switches Setting ...................................................... 57
4. Definition & Location of Major Component .................................................................... 60
5. Pin Description of Major Component............................................................................. 62
5.1 Pentium4 (Willamette/Northwood) processor ..................................................................... 62
5.2 Sis650 North Bridge ................................................................................................. 66
5.3 Sis962 South Bridge ................................................................................................. 75
6. System Block Diagram ............................................................................................... 83
7. Maintenance Diagnostics ............................................................................................ 84
7.1 Introduction ......................................................................................................... 84
7.2 Debug Card ............................................. ............................................................ 85
7.3 Error code....................................... .................................................................... 86
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8050 N/B Maintenance
Contents
8. Trouble Shooting ...................................................................................................... 89
8.1 No Power ............................................................................................................. 90
8.2 Battery Can not Be Charged ........................................................................................ 95
8.3 No Display ....................................... .................................................................... 97
8.4 External Monitor No Display ........................................................................................ 103
8.5 Memory Test Error ................................................................................................. 105
8.6 Keyboard/Touch-pad Test Error ................................................................................... 107
8.7 USB Port Test error.................................................................................................. 109
8.8 Hard Disk Drive Test Error.......................................................................................... 111
8.9 CD-ROM Test Error ................................................................................................ 113
8.10 Audio Test Failure.................................................................................................. 115
8.11 LAN Test Error .................................................................................................... 118
8.12 Modem Test Error............... .................................................................................. 120
8.13 Mini-PCI Test Error........... ......... ........................................................................... 122
8.14 Card Bus&Reader Test Error...................................................................................... 124
8.15 TV Encoder Test Failure ........................................................................................ 126
8.16 IEEE1394 Test Failure ............................................................................................. 128
9. Spare Parts List ....................................................................................................... 130
10. System Exploded View ............................................................................................. 141
11. Circuit Diagram ..................................................................................................... 142
12. Reference Material ................................................................................................. 176
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8050 N/B Maintenance
1. Engineer Hardware Specification
1.1 Introduce
The MiTAC 8050 model is designed for Intel Banias processor with 400MHz FSB with Micro-FCPGA package.
It can support Banias 1.5G ~ 1.9GHz/Dothan 2.0GHz and above.
This system is based on PCI architecture and is fully compatible with IBM PC/AT specification, which has
standard hardware peripheral interface. The power management complies with Advanced Configuration and
Power Interface (ACPI) 2.0. It also provides easy configuration through CMOS setup, which is built in system
BIOS software and can be pop-up by pressing F2 key at system start up or warm reset. System also provides icon
LEDs to display system status, such as AC Power indicator, Battery Power indicator, Battery status indicator,
HDD,CD-ROM, NUM LOCK, CAP LOCK, SCROLL LOCK, RF on/off Card Reader indicator. It also equipped
with LAN, 56K Fax MODEM, 3 USB port, S-Video and audio line in/out , external microphone function.
The memory subsystem supports two expansion DDR SDRAM slot with unbuffered PC1600/PC2100 DDR-
SDRAM.
The Montara-GME GMCH Host Memory Controller integrates a high performance host interface for Intel
Banias processor, a high performance 2D/3D Graphic Engine, a high performance memory controller, Digital
Video port (DVOB & DVOC) interface, and Intel Hub interface Technology connecting with Intel 82801DBM
ICH4-M.
The Intel ICH4-M integrates three Universal Serial Bus 2.0 Host Controllers Interface (UHCI), the Audio
Controller with AC97 interface, the Ethernet includes a 32-bit PCI controller, the IDE Master/Slave controllers,
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8050 N/B Maintenance
and Intel Hub interface technology.
The MOBILITY M10 provides one of the fastest and most advanced 2D, 3D, and multimedia graphics2
performance for notebooks. It's architecture introduces the latest achievements in the graphics industry, which
enable the use of the progressive new features in upcoming applications, but without compromising performance.
ATIs support of support of DirectX