AOC P/N : 41A50-144 service manual POWER-BLOCK check

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POWER-BLOCK check

**Note : the Waveform of U304 pin 2 can determined the power situation

1.stable rectangle waveform with equal duty, freq around 150K-158KHz that means all power of this interface board is in normal operation ,and all status of 5V & 3.3V is working well

2.unstable or uneven rectangle waveform without same duty, that means ABNORMAL operation was happened, check 3.3V or 5V ,if short-circuit or bad component

3.rectangle waveform with large spike & harmonic pulse on front side , means all 3.3v is no load, U200 Gmzan1 was shut-down, and only U302 MCU still working , that means the monitor is in power saving status , all power system is working well .

Measure input power at U304 LM2596 pin 1= 12V ?

OK

Check U304 pin 2 is a stable rectangle wave? Around 150k-158kHz stable rectangle wave with equal duty without any spike or harmonic pulse?

OK

The interface board power is good

NG

Check ADAPTER and connector if loose?

NG Check U304 pin 2 is a unstable rectangle wave ?

OK, unstable wave

NG, with

 

 

harmonic

Check all 3.3V & 5V power, there is

pulse

short circuit or bad component was

 

happened

 

 

 

The interface board is in power- saving state, press power key to wake up & check your signal input

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Contents Spectrum Series SEP Table of Contents LCD-PANEL Specifications for LCD MonitorGeneral specifications Monitor Block Diagram Interface ConnectorsLCD Monitor Description AC-IN AdapterPrecautions and Notices Assembly PrecautionOperating Precautions Storage PrecautionsOperating Instructions PIN no Description REDAdjustment Method AdjustmentAdjustment Conditions and Precautions Adjust 6500 color-temperature Front Panel Control Knobs CIRCUIT-DESCRIPTION OSD-INDEX ExplanationInput not Support CHI-MEI Panel M170E1SIMPLE-INTRODUCTION about LM700 chipset MODULE-TPYE ComponentPanel Power-On Subrotine Chart Software Flow ChartSET factory mode flag Clear factory mode flagII. Main Subrotine Loop Interface-Board Trouble-Shooting chart No Screen AppearMainboard PANEL-POWER CircuitU200-DATA Output Check Oscillator Block as above Keyboard Block check POWER-BLOCK check END There is an interferences in DOS Mode Panel Luminance WAS DownInverter -MODULE Spec &Trouble Shooting Chart CorporationFunction Load Circuit M P O C O R P O R a T I O N Trouble Shooting of CHI-MEI Inverter DIVTL0037-D42 Part List Part Part Number QTY Description Supplier Remark Name Trouble Shooting Hight Voltage Protection Enbale Abnormality Transformer Abnormality Part number 80AL17-1-CH Black, 80AL17-2-CH White Check U101 PIN4NO Freq ~70KHZPage IV. Adapter BOM List Part no AL15-2-LI Reference Part Quantity Cat.NOPCB PCB for CH-1205 Revd PCS For Front Heatsink AUDIO-MODULE Trouble shooting chart No Voice OutputAudio BOM II. Sound DistortionGMZAN1 Pin Description Analog-to-Digital ConverterPIN # Name DescriptionHost Interface HIF / External On-Screen Display Clock Recovery / Time Base Conversion TFT Panel Interface PIN #Name Description 2pxl/clk 1pxl/clk TFTTest Pins System-level Block Diagram Typical Stand-alone ConfigurationOperating Modes NativeSlow Dclk ZoomSource Stand Alone DownscalingDestination Stand Alone Overall Architecture Clock Recovery CircuitFunctional Description Clock Recovery Circuit Clock Recovery Characteristics Sampling Phase AdjustmentSource Timing Generator Minimum Typical MaximumADC Characteristics Analog-to-Digital Converter 2.3.1 Pin ConnectionPin Connection for RGB Input with Hsync/Vsync Pin Connection for RGB Input with Composite SyncSync. Signal Support Display Mode SupportInput Timing Measurement Source Timing MeasurementIRQ-Generation Conditions IRQ Event Remark IRQ ControllerData Path TFT Panel Interface Timing Specification Scaling FilterGamma Table RGB OffsetPclk *1 PCLKB*4Hsync width in TFT Vsync width and display position in TFTHorizontal size in TFT Power Manager One pixel per clock mode in TFTState 0 Power Off State 1 Power OnState 2 Panel Drive Enabled State 3 Panel Fully ActivePanel Interface Drive Strength Host InterfacePanel Interface Pad Drive Strength Value 4 bits Drive Strength in mATiming Diagram of the gmZAN1 Serial Communication Serial Communication ProtocolOn-Screen Display Control GmZAN1 Serial Channel Specification Parameter Min Typ MaxMulti-Function Bus MFB OSD Color Map On-Chip OSD ControllerTclk Specification Tclk InputElectrical Characteristics DC Electrical Characteristic Parameter Min Typ MaxAbsolute Ratings Parameter Min Typ Max PvddMechanical of Cabinet Front DIS-ASSEMBLY Parts List of Cabinet T780KMGHBAA0A SpecificationParts List of Cabinet continue Parts List of Conversion Board Location CBPC780GM SpecificationLocation AI780GM Specification Location AI780GM SMD EC 22UF 16V 85C Csize Parts List of KEY PC Board KEPC780EKParts List of DC-POWER Board Parts List of Audio BoardInverter Module Power System and Consumption CurrentAdapter Module PCB Layout Schematic Diagram TOP-LEVEL FlowII. GMZAN1 Block Lvds Block MCU Block Power Block Adapter Schematic CH-1205 KBL405GC1,C2,C4 --- 1uF/50V

P/N : 41A50-144 specifications

The AOC P/N: 41A50-144 is a versatile and high-performing monitor that caters to both professional and casual users. With its sleek design and array of features, this model embodies the epitome of modern display technology.

One of the standout characteristics of the AOC 41A50-144 is its impressive display resolution. Equipped with a 1920 x 1080 pixels Full HD panel, it delivers sharp, vibrant images and ensures that text and graphics appear crisp and clear. The monitor boasts a wide viewing angle that allows for consistent color reproduction, making it perfect for collaborative workspaces or multi-screen setups.

In terms of refresh rates, the AOC 41A50-144 supports a 144Hz refresh rate, catering exceptionally well to gamers and media consumers who seek responsive performance. This high refresh rate reduces motion blur, providing a smoother experience during fast-paced gaming sessions or action-packed videos. Coupled with a 1ms response time, this monitor minimizes ghosting and lag, delivering a seamless visual experience.

The monitor utilizes advanced technologies to enhance the viewing experience further. One notable feature is AMD FreeSync support, which synchronizes the monitor's refresh rate with the GPU's frame rate, effectively eliminating screen tearing and stuttering during gameplay. This leads to a more immersive experience and ultimately gives gamers a competitive edge.

Another critical aspect of the AOC 41A50-144 is its connectivity options. It comes with multiple ports including HDMI, DisplayPort, and VGA, making it compatible with a wide range of devices. This versatility ensures that users can easily connect their computers, gaming consoles, or multimedia players without any hassle.

The AOC 41A50-144 also places importance on user comfort. It incorporates features like flicker-free technology and a low blue light mode to reduce eye strain during extended use. This focus on ergonomics allows for a more enjoyable viewing experience, regardless of the tasks at hand.

Overall, the AOC P/N: 41A50-144 combines high-performance, advanced technologies, and user-centered design. Whether for gaming, professional tasks, or entertainment purposes, this monitor stands out as a reliable and efficient solution that meets the demands of various users. Its features and specifications make it a compelling choice for anyone looking to enhance their display setup.
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