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SERVICE MANUAL FOR
8050QMA
BY: ZX Xiao
Repair Technology Research Department /EDVD
Jun.2005 / R01
8050QMA N/B Maintenance
Contents
1. Hardware Engineering Specification ................................................................................. 4
1.1 Introduction ................................................................................................................................ 4
1.2 System Hardware Parts .................................................................................................................. 7
1.3 Other Functions ........................................................................................................................... 32
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1.4 Power Management ...................................................................................................................... 39
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1.5 Appendix 1 : Intel ICH6-M GPIO Definitions ..................................................................................... 42
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1.6 Appendix 2 : W83L950D KBC Pins Definitions .................................................................................... 44
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1.7 Appendix 3 : 8050QMA Product Spec ............................................................................................ ... 46
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2. System View and Disassembly ..........................................................................................
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2.1 System View ................................................................................................................................ 49
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2.2 Tools Introduction ........................................................................................................................ 52
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2.3 System Disassembly ....................................................................................................................... 53
3. Definition & Location of Connectorsd
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3.1 Mother Board (Side A) .................................................................................................................. 74
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3.2 Mother Board (Side B) .................................................................................................................. 75
4. Definition & Location of Major Components ....................................................................... 76
4.1 Mother Board (Side A) .................................................................................................................. 76
4.2 Mother Board (Side B) .................................................................................................................. 77
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8050QMA N/B Maintenance
Contents
5. Pin Description of Major Component ................................................................................ 78
5.1 Intel 915PM North Bridge ............................................................................................................. 78
5.2 Intel ICH6-M South Bridge ............................................................................................................ 88
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6. System Block Diagram ................................................................................................... 98
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7. Maintenance Diagnostics ................................................................................................ 99
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7.1 Introduction ................................................................................................................................ 99
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7.2 Maintenance Diagnostics................................................................................................................. 100
7.3 Error Codes ................................................................................................................................ 101
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8. Trouble Shooting .......................................................................................................... 103
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8.1 No Power .................................................................................................................................... 105
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8.2 No Display .................................................................................................................................. 112
8.3 VGA Controller Failure LCD No Display ............................................................................................ 115
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8.4 External Monitor No Display ........................................................................................................... 117
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8.5 Memory Test Error ....................................................................................................................... 119
8.6 Keyboard (K/B) Touch-Pad (T/P) Test Error ....................................................................................... 121
8.7 Hard Drive Test Error .................................................................................................................. 123
8.8 CD-ROM Drive Test Error ............................................................................................................ 125
8.9 USB Port Test Error ...................................................................................................................... 127
8.10 Audio Failure ............................................................................................................................. 129
8.11 LAN Test Error .......................................................................................................................... 132
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8050QMA N/B Maintenance
Contents
8.12 PC Card Socket Failure ............................................................................................................... 134
9. Spare Parts List ............................................................................................................ 136
10. Reference Material ....................................................................................................... 150
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8050QMA N/B Maintenance
1. Hardware Engineering Specification
1.1 Introduction
1.1.1 General Description
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This document describes the brief introduction for MiTAC 8050QMA portable notebook computer system.
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1.1.2 System Overview ec u
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The MiTAC 8050Q model is designed for Intel Dothan processor with 533MHz FSB with Micro-FCPGA package.
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This system is based on PCI architecture and is fully compatible with IBM PC/AT specification, which has
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standard hardware peripheral interface. The power management complies with Advanced Configuration and Power
Interface. It also provides easy configuration through CMOS setup, which is built in system BIOS software and can
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be pop-up by pressing F2 key at system start up or warm reset. System also provides icon LEDs to display system
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status, such as AC Power indicator, Battery Power indicator, Battery status indicator, HDD,CD-ROM, NUM
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LOCK, CAP LOCK, SCROLL LOCK, Wireless on/off Card Reader Accessing. It also equipped with LAN, 56K
Fax MODEM, 4 USB port, S-Video and audio line in/out , external microphone function.
The memory subsystem supports DDR or DDR2 SDRAM channels (64-bits wide).
The 915PM MCH Host Memory Controller integrates a high performance host interface for Intel Dothan processor,
a high performance PCI Express interface, a high performance memory controller and Direct Media Interface
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8050QMA N/B Maintenance
(DMI) connecting with Intel ICH6-M.
The Intel ICH6-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, the
SATA controller and Direct Media Interface technology.
The Realtek RTL8100CL is a highly integrated, cost-effective single-chip Fast Ethernet controller that provides 32-
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bit performance, PCI bus master capability, and full compliance with IEEE 802.3u 100Base-T specifications and
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IEEE 802.3x Full Duplex Flow Control. It also supports the Advanced Configuration Power management Interface
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(ACPI).
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The VT6301S is a single chip PCI Host Controller for IEEE 1394-1995 Release 1.0 and IEEE 1394a P2000. It
implements the Link and PHY layers for IEEE 1394-1995 High Performance Serial Bus specification release 1.0
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and 1394a P2000. It is compliant with 1394 Open HCI 1.0 and 1.1 with DMA engine support for high performance
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data transfer via a 32-bit bus master PCI host bus interface. The VT6301S supports 100, 200 and 400 Mbit/sec
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transmission via an integrated 1-port PHY. The VT6301S services two types of data packets: asynchronous and
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isochronous (real time). The 1394 link core performs arbitration requesting, packet generation and checking, and
bus cycle master operations. It also has root node capability and performs retry operations.
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The ENE CB712 CardBus/Media Reader controller functions as a single slot PCI to Cardbus bridge and also PCI
interface MS/SD/MMC flash card reader. The CB712 provide one Cardbus slot and all reader interface may
operate simultaneously.
The W83L950D is a high performance microcontroller on-chip supporting functions optimized for embedded
control. These include ROM, RAM, four types of timers, a serial communication interface, optional I◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo