Acer 270 manual Nvpwr, Dac, Brig, PWM Invpw

Page 36

3. Automatic brightness compensation for input voltage variation.

Electrical Characteristics

No

Parameter

Symbol

Min.

Typ.

Max.

Unit

Comment

.

 

 

 

 

 

 

 

 

1

Input

NV_PWR

9

14.8

21

V

 

 

 

voltage

 

 

 

 

 

 

 

2

Input

Iin

--

0.33

--

A

 

 

 

current

 

 

 

 

 

 

 

3

Lamp

IL

2.7

--

6.3

mA

*Note 1

 

 

 

 

current

 

 

 

 

 

 

 

4

Frequency

F

45

55

65

KHz

* Note 2

 

 

 

 

 

 

 

5

Output

Pout

--

--

4.5

W

 

 

 

power

 

 

 

 

 

 

 

6

Efficiency

η

80%

--

--

--

 

 

7

Starting

Vs

1600

--

---

V

At 0’C

 

 

voltage

 

 

 

 

 

 

 

8

Starting

Tvs

1

--

1.5

Sec

 

 

 

time

 

 

 

 

 

 

 

9

Dispoff#

 

2.8

3.3

3.6

V

Backlight on/off signal

 

 

 

0

0.5

0.8

V

Low level

 

10

Limited

DAC-

0

 

3.3

V

*Note 1

 

 

lamp

BRIG

 

 

 

 

 

 

 

maximum

 

 

 

 

 

 

 

 

current

 

 

 

 

 

 

 

11

PWM

INV_PW

142

150

158

Hz

PWM signal frequency

 

signal

M

 

 

 

 

 

 

 

*Note 4

 

3.0

3.3

3.6

V

PWM signal amplitude

 

 

 

 

 

 

30

--

100

%

 

 

 

 

 

 

 

 

 

Duty

Ton

 

 

 

 

 

 

 

= ------------------

 

 

 

 

 

 

 

 

Period

12

Lamp

I zero-PK

--

--

10

%

Line transient (10.8V to

 

current

 

 

 

 

 

21V/100us) and turn on

 

over-shoot

 

 

 

 

 

transient

 

13

Current

 

1.27

 

1.56

Multiple

I p

 

 

Waveform

I p

 

2

 

 

 

 

factor

 

 

 

I rms

 

 

 

 

 

 

 

 

*10

 

 

I rms

 

 

 

 

or

 

 

 

 

 

 

 

 

14

Unbalance

 

-10%

0

+10%

Mulitple

 

 

 

Rate

Ip Ip

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Irms

 

 

 

 

 

 

15

Turn off

Voff

--

--

100Vp-

V

PWM=40%

 

voltage

 

 

 

P

 

 

 

16

Voltage

Trise

--

--

300us

us

PWM=40%

 

Rise time

 

 

 

 

 

 

 

17

Voltage fall

Tfall

--

--

300us

us

PWM=40%

 

time

 

 

 

 

 

 

 

NOTE: Please pay attention to the fellowing:

*1. Limited lamp maximum current by DAC_BRIC signal:

Chapter 1

31

Image 36
Contents ServiceGuide Date Chapter Updates Revision HistoryCopyright DisclaimerConventions Screen MessagesPreface Table of Contents Chapter Troubleshooting Chapter Jumper and Connector LocationsAppendix a Model Definition and Configuration 108 Chapter FRU Field Replaceable Unit ListFeatures ChapterExpansion System Block Diagram Board Layout Top ViewBottom View Outlook View Front ViewIcon Description Chapter Left Panel Right Panel Rear Panel Bottom Panel Indicators Icon Function DescriptionLock Keys Lock Key DescriptionDesired Access Num Lock On Num Lock Off Embedded Numeric KeypadWindows Keys Key Icon DescriptionHot Keys Hot Key Icon Function DescriptionHot Key Icon Function Euro Symbol Click on Start, Settings, Control PanelLaunch Key Default application Launch KeysMail Detection Touchpad Touchpad BasicsFunction Left Button Right Button Scroll Button Tap Function Left Button Right Button Scroll Button Tap Hardware Specifications and Configurations SpecificationProcessor Second Level CacheMemory Combinations LAN InterfaceModem Interface Floppy Disk Drive InterfaceDVD-ROM Interface RPMATA-5 DMAVideo Resolutions Mode for both LCD and CRT Audio InterfaceVideo Interface Parallel PortUSB Port Pcmcia PortSystem Board Major Chips KeyboardBattery CPT CLAA14/XF01CPT CLAA150PA01 IBM ITSX95CNvpwr DACBrig PWM InvpwElectrical specification ThermalAdapter ADP-65DB BG65W 3 Pins AC AdapterMechanical Specification Environmental RequirementsMemory Address Map Address MapIRQ Assignment Map DMA Channel Assignment Bios Setup Utility System UtilitiesChanges made and exit the Bios Setup Utility Main NtscScreen Expansion Option Enabled or Disabled Parameter Description Format/OptionSystem Devices ParameterOptions Security XitClear or Set Parameter Description OptionChanging a Password Page Boot Info Parameter DescriptionExit Bios Flash Utility System Diagnostic DisketteRunning Diagnostics Program Then Y key to next test Chapter Page Chapter Machine Disassembly and Replacement General Information Before You BeginDisassembly Procedure Flowchart Screw ListCPU Frame NUT Screw, M2.0X0.4P+3FP-ZKNL Removing the Battery Pack Removing the HDD Module/Memory/FDD Module/Optical Module CPURemoving the CPU Chapter Removing the LCD Module and Switch Board Removing the LCD ModuleRemoving the Switch Board Disassembling the Main Unit Disassembling the logic upperChapter Disassembling the logic lower Disassembling the LCD Module Disassembling the External Modules Disassembling the HDD ModuleChapter Troubleshooting Symptoms Verified Go ToSystem Check Procedures External Diskette Drive CheckExternal CD-ROM/DVD-ROM Drive Check Memory Check Power System Check Keyboard or Auxiliary Input Device CheckCheck the Power Adapter Touchpad Check Display CheckSound Check Power-On Self-Test Post Error Message Index of Error Messages Error Message ListError Messages FRU/Action in Sequence Setup02F0 CPU ID Index of Symptom-to-FRU Error Message LCD-Related SymptomsIndicator-Related Symptoms Power-Related SymptomsPCMCIA-Related Symptoms Memory-Related SymptomsSpeaker-Related Symptoms Power Management-Related SymptomsPeripheral-Related Symptoms Keyboard/Touchpad-Related SymptomsModem-Related Symptoms LCD FPCIntermittent Problems Undetermined Problems DimmIndex of AFlash Bios Error Message Error Message Action in SequenceChapter Jumper and Connector Locations Top ViewSetting Power Button Onsystem on OFF System OFFNone 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-PANASONIC Battery LI-ION 8 CELL-SAMSUNGSwitch Board Wireless LAN CombocardFFC-TOUCHPAD FFC-PHONE JackCABLE-MODEM Antenna LINE-LDimm Cover Heatsink CoverLower Case W/O SPEAKER-INCLUDING Batter LATCH, NOB, SpringTouchpad Bracket Touchpad CoverCPU Support Bracket Hinge SADDLE-RHDD Connector FDD Assy FDD MODULE, PanasonicFDD MODULE, Mitsumi FDD Drive PanasonicHDD Bracket Cover AS1400 Keyboard Chicony UKAS1400 Keyboard Chicony US Assy LCD Module 14.1 XGA AULCD Inverter LCD Bracket L15 XGA AULCD Bracket L15 XGA LG LCD Bracket L15 XGA HitachiWire SET 14.1 XGA AU Wire SET 14.1 XGA CPTWire SET 15.0 XGA AU Wire SET 15.0 XGA LGCD-ROM Drive 24X QSI SCR-242-S Assy CD-ROM Drive 24X Samsung SN-124PDVD-ROM Drive 8X Toshiba SD-2612 DVD-ROM Drive 8X Hlds GDR-8081NThermal Screw with Spring Thermal Screw with White SpringAppendix a TravelMate 270 SeriesModel MemoMain Features Appendix a 110 Test Compatible Components Appendix BSpecifications Microsoft Windows XP Home Environment TestPcmcia Microsoft Windows XP Pro Environment Test Appendix B 115 Microsoft Windows Environment Test Appendix B 117 118 Online Support Information Appendix C120 Bios IndexPcmcia
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270 specifications

The Acer 270 series, part of Acer's versatile lineup of laptops, is designed to cater to a wide range of user needs, from casual browsing to more demanding tasks. This model stands out due to its robust combination of features, innovative technologies, and sleek design, making it an attractive option for students, professionals, and everyday users alike.

At the heart of the Acer 270 series is its impressive display. The laptop often features a Full HD screen that delivers stunning visuals with vibrant colors and sharp details. This makes it ideal for watching videos, editing photos, or simply browsing the web. The slim bezels enhance the viewing experience, creating an immersive feel that many users appreciate.

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Additionally, Acer includes proprietary technology enhancements such as Acer BlueLightShield, which reduces eye strain during long periods of use, and Acer TrueHarmony for improved audio quality.

Overall, the Acer 270 series is characterized by its blend of performance, reliability, and portability, making it a solid choice for a wide array of users looking for a capable laptop that meets everyday computing needs.