AOC P/N : 41A50-144 service manual Part number 80AL17-1-CH Black, 80AL17-2-CH White

Page 32

6 C). ADAPTER-MODULE Trouble shooting chart

The following spec & block-diagram is offer by CHI-SAM –COMPANY, for External Adapter

part number : 80AL17-1-CH ( Black), 80AL17-2-CH ( White)

AC ADAPTER CH-1205 TROUBLE SHOOTING

NO VOLTAGE O/P

CHECK BD101	NO
AC VOLT. I/P OK ?

YES

REPLACE

F101

CHECK BD101

NO

REPLACE

BD101

DC VOLT. O/P OK ?

YES

CHECK U101	PIN7	NO
12~15Vdc	OK ?

YES

CHECK U101 PIN4NO FREQ. (50~70KHZ)

OK ?

YES

CHECK Q101		NO
PIN	G & PIN D WAVE
	OK ?
OK?

YES

CHECK R115,D103,U101

NG ?

CHECK

C110,U101

NG ?

CHECK Q101

NG

CHECK D106, D107, U102, U103

31

Image 32

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