Acer D240H service manual Troubleshooting

Page 63

Acer

Acer –LCD-D240H

04 Troubleshooting

4.1 Black Sreen

Black Screen

Check power supply:

NG

Pin 3, 4 of CN101

 

 

 

POWER Fail

OK

Check power supply:

NG

For U102

 

Check U101,

U106

OK

Check reset:

NG

pin114 of U102

 

Check C125,

R133

OK

Check Crystal waveform

 

 

 

NG

 

 

Pin 116,117 of U102

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OK

 

 

 

 

 

 

 

 

 

 

 

OK

 

 

 

OK

 

Check CCFL_Enable

 

Check Pin 105 of

 

 

 

 

Pin 100 of U102

 

 

CN102

 

 

 

 

 

NG

 

 

 

NG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check X101, C126,

C114,R134

Inverter Fail

U102 fail

Image 63
Contents LCD Monitor Acer D240H Table of Contents Important Safety Notice Main Features AccessoriesGeneral Storage Operation SpecificationsEnvironmental conditions Operating Specification Safety, EMC, Ergonomics and Compatibility RequirementsOutput characteristics Items Condition Spec Condition SpecReliability Items Specification Protection characteristics Condition SpecStatus Sync Video Power Backlight Power SupplyWarm Mode Chromaticity Coordinate CoolBrightness output White balanceHdmi Input / Output Signal SpecificationsAudio USB in OptionVGA DVI-DItems Condition Specification Timing tableHorizontal Vertical Other Modes DDC data Mode Resolution Pixel Clock MHz Sync KHz Sync Hz RatioItems Specification Audio output SpecDPF function introduce DPF functionNand play photo function Card reader functionMemory card test DPF function test 11.4.1 DPF select photo mode flow DPF setting menu flow Acer Setting menu layer-1 Setting menu layer-2 Setting menu layer-3 Acer Acer DPF System Profile Panel general specifications Function SpecificationsOSD Structure First Second Third Fourth Control Range Default ValueEmea NO-EMEA Depend on timing & S/N Italiano 意大利语 OSD TranslationMain menu Noemea English Deutsch Français Español简体中文 日本語 西班牙语 Deutsch Français Español ItalianoColor management OSD scenario OSD language Nonemea English 意大利语 荷兰语 芬兰语Dimension Spec Dimension3Mechanical Specification 2Cabinet Material4Base Mechanical Interface Random Vibration Unit Package SpecificationUnits package Items Spec Unit Packing VibrationDrop Heightcm Gross Weightkg1S/N Label Carton labelPage Flat Panel Specification Product Specification Handling Precautions General Description Display CharacteristicsUnit Conditions Min Typ Max Optical CharacteristicsProduct Specification Tr F Tr R B R G B Functional Block Diagram PCB InterfaceMating Type Absolute Maximum Ratings TFT LCD ModuleBacklight Unit Min Typ Max Unit Conditions SymbolSymbol Parameter Min Typ Max Units Condition Signal Electrical CharacteristicsParameter Min Typ Max Unit Product Specification Signal Characteristic Pixel Format Image Input data format= Odd Pixel Data E = Even Pixel Data PIN # Signal Name Description Signal DescriptionSymbol Min Typ Max Unit Timing CharacteristicsCLK Timing diagramParameter Value Unit Min Typ Max Power ON/OFF SequencePin Assignment Connector & Pin AssignmentSignal for Lamp connector Items Required Condition Reliability TestShipping Label Mechanical Characteristics Ver Ver Exploded Diagram Troubleshooting Bad Screen White Sreen Spare parts List Assy Bezel ,LP2441 If BD Layout Schematics and LayoutsPower BD Layout Acer Keypad BD Layout Touchpad BD Layout Card BD Layout 5Switching Mode Power Supply circuit CF 16 Bit I/F Assembly and Disassembly Main Board S11 Set up the speaker Page S17 Assemble the base with the stand

D240H specifications

The Acer D240H is a remarkable monitor that embodies modern technology and design, appealing to both casual users and professionals alike. Boasting a sleek and minimalist aesthetic, the D240H features an ultra-slim profile, making it a stylish addition to any workspace or home setup. One of the standout aspects of this monitor is its vibrant 24-inch Full HD display, delivering crisp and clear visuals with a resolution of 1920 x 1080 pixels. This level of clarity is perfect for tasks ranging from everyday office work to gaming and multimedia consumption.

The monitor incorporates IPS technology, which provides broader viewing angles and enhanced color reproduction. With an impressive 178-degree viewing angle, users can enjoy consistent color and picture quality from virtually any position. This feature is particularly beneficial for collaborative environments where multiple viewers need to see the screen simultaneously.

Additionally, the Acer D240H is designed with the user’s comfort in mind. The monitor incorporates Acer's EyeProtect technology, which reduces eye strain during extended use. This includes features such as Flicker-less technology to eliminate flickering on the display and Blue Light Filter to minimize harmful blue light emissions. These enhancements allow users to work or play for longer periods without discomfort.

In terms of connectivity, the D240H is versatile, featuring HDMI and VGA ports, making it compatible with a wide range of devices, from laptops to gaming consoles. The inclusion of these ports ensures that users can easily connect and switch between different devices.

Another notable characteristic of the Acer D240H is its energy efficiency. It is designed to consume less power without compromising performance, which not only reduces energy costs but also contributes to a greener environment. Furthermore, it meets various environmental standards, making it an eco-friendly choice.

In conclusion, the Acer D240H is a feature-rich monitor that combines superior display technology, user comfort, and energy efficiency. Whether for work or leisure, it delivers a visually appealing experience that meets the needs of various users, making it a smart choice in today’s competitive monitor market.