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Acer Aspire 1400 Aspire 1400 Notebook Service Guide - Page 36

Battery, LCD Inverter Specification, Wide range 9V to21V input voltage.

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Battery Item Vendor & model name Battery Type Pack capacity Cell voltage Number of battery cell Package configuration Package voltage Specification Sony Li-ion 57Wh 3.7V/cell 12 4 cells in series, 3 series in parallel 14.8v LCD Inverter Specification This inverter is designed to light up the CCFL of LCD for Aspire 1400 notebook. It should be supported the following LCD panels. No. Supplier 1 LG 2 Hanstar 3 Unipac 4 IBM 5 Toshiba 6 Unipac 7 Hanstar 8 CPT 9 Hanstar 10 Sharp Model LP150x04 HSD150PX11-A UB150XN01 ITUX97C LTM14C506 UB141X03 HSD141PX11-B CLAA150PA01 HSD1509K11-A LQ150X1LH63 Type TFT, 15.0" XGA TFT, 15.0" XGA TFT, 15.0" XGA TFT, 15.0" UXGA TFT, 14.1" XGA TFT, 14.1" XGA TFT, 14.1" XGA TFT, 15.0" SXGA+ TFT, 15.0" SXGA+ TFT 15.0" XGA There are two control signals that come form system to control lamp brightness. One signal is named DAC_BRIG, which limits current to meet LCD lamp current specification. Another one is named PWM, which adjusts lamp brightness. This inverter brightness is adjusted by PWM burst mode. The PWM burst mode is that turning on and off the lamp at rate of 150Hz. The effective brightness is a function of the duty cycle. Features 1. Wide range 9V to21V input voltage. 2. Birghtness adjustment by PWM duty mode. 30 Chapter 1

Section	Page
Aspire 1400	1
Revision History	2
Copyright	3
Disclaimer	3
Conventions	4
Preface	5
Table of Contents	7
Ch.1 System Specifications	9
Features	9
System Block Diagram	11
Board Layout	12
Top View	12
Bottom View	13
Outlook View	15
Front View	15
Left Panel	17
Right Panel	18
Rear Panel	19
Bottom Panel	20
Indicators	21
Keyboard	23
Lock Keys	23
Embedded Numeri c Keypad	24
Windows Keys	25
Hot Keys	26
Keyboard Ergonomics	27
Touchpad	28
Touchpad Basics	28
Launch Keys	30
Hardware Specifications and Configurations	31
Ch.2 System Utilities	43
BIOS Setup Utility	43
Navigating the BIOS Utility	43
Main	44
Advanced	46
Security	48
Others	51
Boot	52
Exit	53
BIOS Phlash Utility	54
System Diagnostic Diskette	54
Running Diagnostic Program	55
Ch.3 Machine Disassembly and Replacement	61
General Information	62
Disassembly Procedure Flowchart	63
Removing the HDD Module/FDD Module/RAM Door and Optical Drive	66
Removing the LCD Module/the Power Board and the Keyboard	67
Removing the LCD Module	67
Removing the Power Board and the Keyboard	67
Disassembling the Main Unit	68
Separate the main unit into the logic upper and the logic lower assembly	68
Disassembling the logic upper	68
Disassembling the logic lower	70
Disassembling the LCD Module	72
Disassembling the External Modules	73
Disassembling the HDD Module	73
Disassembling the Floppy Disk Drive Module	73
Disassembling the Optical Drive Module	73
Ch.4 Troubleshooting	75
System Check Procedures	76
External Diskette Drive Check	76
External CD-ROM Drive Check	76
Keyboard or Auxiliary Input Device Check	77
Memory Check	77
Power System Check	77
Touchpad Check	78
Power-On Self-Test (POST) Error Message	79
Index of Error Messages	80
Index of Symptom-to-FRU Error Message	83
Intermittent Problems	86
Undetermined Problems	87
Index of AFlash BIOS Error Message	88
Ch.5 Jumper and Connector Locations	89
Top View	89
SW1 Settings (Lid switch)	90
SW2 Settings	90
Bottom View	91
Ch.6 FRU (Field Replaceable Unit) List	93
App. A Model Definition and Configuration	110
Aspire 1400	110
Main Features	111
App. B Test Compatible Components	113
Microsoft Windows XP Environment Test	114
App. C Online Support Information	115

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