Acer 270 manual Electrical specification, Thermal

Page 37

When DAC_BRIG voltage is 0V and INV_PWM enables (100%), lamp has max. current.

When DAC_BRIG voltage is 3.3V and INV_PWM enables (100%), lamp has min. current.

DAC_BRIG signal comes from system chipset with internal resistance of 3K

*2. Inverter operating frequency should be within specification (45~65kHz) at max. and min. brightness load.

*3. INV_PWM enable implies INV_PWM signal is High level (On duty cycle is 100%). It is a square wave of 150Hz to adjust backlight brightness that is a function of PWM duty cycle. Backlight brightness is maximum value under INV_PWM at 100% and brightness is minimum under INV_PWM at 30%.

*4.The system interface signals belong to 3.3V.

*5. Please make sure open lamp output voltage should be within starting voltage specification.

*6. Inverter should pass human body safety test.

*7. Inverter should be no smoking by any component open/short test.

*8. Transformer voltage stress should not be over 85% under any condition.

(turn on overshoot transient and line transient.)

*9. Audio noise should be less than 36dB at 10cm distance.

.

Electrical specification

No

Symbol

Min.

Typ.

Max.

Unit

Comment

.

 

 

 

 

 

 

 

 

 

 

 

 

 

1

V oper*

--

700

--

Vrms

Lamp operating voltage

 

Il

5.7

6.0

6.3

mArms

DAC_BRIG: 0V,

 

 

 

 

 

 

PWM:100%

 

Il

2.7

3.0

3.3

mArms

DAC_BRIG: 0V,

 

 

 

 

 

 

PWM:30%

 

F

45

55

65

kHz

 

 

 

 

 

 

 

 

 

η

80%

--

--

--

 

 

 

 

 

 

 

 

Thermal

All components on inverter board should follow below rules:

1.Component using conditions (component stress) must be within component specification including voltage rating, current rating, temperature etc.

2.Component temperature shold follow below:

T <=30 degree C, at 25, 35 degree C.

Component temperature should be less than 70 degree C inside system at 35 degree C.

LCD

Item

 

Specification

 

 

 

 

 

 

 

 

Vendor & model

AU UB

Samsung

Hannstar

Hannstar

IBM ITUX97C

name

141X03

LTN141XF-

HSD150PXII-

HSD150PKII-

 

 

 

L05

B

B

 

 

 

 

 

 

 

Mechanical Specifications

 

 

 

 

 

 

 

 

 

 

LCD display area

14.1

14.1

15.0

15.0

15.0

(diagonal, inch)

 

 

 

 

 

 

 

 

 

 

 

Display technology

TFT

TFT

TFT

TFT

TFT

 

 

 

 

 

 

Resolution

XGA

XGA

XGA

SXGA+

UXGA

 

(1024x768)

(1024x768)

(1024x768)

(1400x1050)

(1600X1200)

 

 

 

 

 

 

32

Chapter 1

Image 37
Contents ServiceGuide Revision History Date Chapter UpdatesDisclaimer CopyrightScreen Messages ConventionsPreface Table of Contents Chapter Jumper and Connector Locations Chapter TroubleshootingAppendix a Model Definition and Configuration 108 Chapter FRU Field Replaceable Unit ListChapter FeaturesExpansion System Block Diagram Top View Board LayoutBottom View Front View Outlook ViewIcon Description Chapter Left Panel Right Panel Rear Panel Bottom Panel Icon Function Description IndicatorsLock Key Description Lock KeysEmbedded Numeric Keypad Desired Access Num Lock On Num Lock OffKey Icon Description Windows KeysHot Key Icon Function Description Hot KeysHot Key Icon Function Click on Start, Settings, Control Panel Euro SymbolLaunch Keys Launch Key Default applicationMail Detection Touchpad Basics TouchpadFunction Left Button Right Button Scroll Button Tap Function Left Button Right Button Scroll Button Tap Specification Hardware Specifications and ConfigurationsProcessor Second Level CacheLAN Interface Memory CombinationsModem Interface Floppy Disk Drive InterfaceRPM DVD-ROM InterfaceATA-5 DMAAudio Interface Video Resolutions Mode for both LCD and CRTVideo Interface Parallel PortPcmcia Port USB PortSystem Board Major Chips KeyboardCPT CLAA14/XF01 BatteryCPT CLAA150PA01 IBM ITSX95CDAC NvpwrBrig PWM InvpwThermal Electrical specificationAC Adapter Adapter ADP-65DB BG65W 3 PinsEnvironmental Requirements Mechanical SpecificationAddress Map Memory Address MapIRQ Assignment Map DMA Channel Assignment System Utilities Bios Setup UtilityChanges made and exit the Bios Setup Utility Ntsc MainParameter Description Format/Option Screen Expansion Option Enabled or DisabledParameter System DevicesOptions Xit SecurityParameter Description Option Clear or SetChanging a Password Page Boot Parameter Description InfoExit System Diagnostic Diskette Bios Flash UtilityRunning Diagnostics Program Then Y key to next test Chapter Page Chapter Machine Disassembly and Replacement Before You Begin General InformationScrew List Disassembly Procedure FlowchartCPU Frame NUT Screw, M2.0X0.4P+3FP-ZKNL Removing the Battery Pack CPU Removing the HDD Module/Memory/FDD Module/Optical ModuleRemoving the CPU Chapter Removing the LCD Module Removing the LCD Module and Switch BoardRemoving the Switch Board Disassembling the logic upper Disassembling the Main UnitChapter Disassembling the logic lower Disassembling the LCD Module Disassembling the HDD Module Disassembling the External ModulesChapter Symptoms Verified Go To TroubleshootingExternal Diskette Drive Check System Check ProceduresExternal CD-ROM/DVD-ROM Drive Check Keyboard or Auxiliary Input Device Check Memory Check Power System CheckCheck the Power Adapter Display Check Touchpad CheckSound Check Power-On Self-Test Post Error Message Error Message List Index of Error MessagesError Messages FRU/Action in Sequence Setup02F0 CPU ID LCD-Related Symptoms Index of Symptom-to-FRU Error MessageIndicator-Related Symptoms Power-Related SymptomsMemory-Related Symptoms PCMCIA-Related SymptomsSpeaker-Related Symptoms Power Management-Related SymptomsKeyboard/Touchpad-Related Symptoms Peripheral-Related SymptomsModem-Related Symptoms LCD FPCIntermittent Problems Dimm Undetermined ProblemsError Message Action in Sequence Index of AFlash Bios Error MessageChapter Top View Jumper and Connector LocationsPower Button Onsystem on OFF System OFF SettingNone Stand by Hibernate ON/OFF Button Bottom View Chapter FRU Field Replaceable Unit List Exploded Diagram Logic Upper Assy LCD LCD DVD Assy FDD Assy Battery LI-ION 8 CELL-SAMSUNG Battery LI-ION 8 CELL-PANASONICSwitch Board Wireless LAN CombocardFFC-PHONE Jack FFC-TOUCHPADCABLE-MODEM Antenna LINE-LHeatsink Cover Dimm CoverLower Case W/O SPEAKER-INCLUDING Batter LATCH, NOB, SpringTouchpad Cover Touchpad BracketCPU Support Bracket Hinge SADDLE-RFDD Assy FDD MODULE, Panasonic HDD ConnectorFDD MODULE, Mitsumi FDD Drive PanasonicAS1400 Keyboard Chicony UK HDD Bracket CoverAS1400 Keyboard Chicony US Assy LCD Module 14.1 XGA AULCD Bracket L15 XGA AU LCD InverterLCD Bracket L15 XGA LG LCD Bracket L15 XGA HitachiWire SET 14.1 XGA CPT Wire SET 14.1 XGA AUWire SET 15.0 XGA AU Wire SET 15.0 XGA LGAssy CD-ROM Drive 24X Samsung SN-124P CD-ROM Drive 24X QSI SCR-242-SDVD-ROM Drive 8X Toshiba SD-2612 DVD-ROM Drive 8X Hlds GDR-8081NThermal Screw with White Spring Thermal Screw with SpringTravelMate 270 Series Appendix aModel MemoMain Features Appendix a 110 Appendix B Test Compatible ComponentsMicrosoft Windows XP Home Environment Test SpecificationsPcmcia Microsoft Windows XP Pro Environment Test Appendix B 115 Microsoft Windows Environment Test Appendix B 117 118 Appendix C Online Support Information120 Index BiosPcmcia
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270 specifications

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