Panasonic TH-42PHW5, TH50PHW5, TH-50PHD5, TH-42PHD5 manual

Page 35

Over-voltage protection (OVP) is provided via pin 6 of connector P16. This voltage enters pin 4 of IC601 for immediate shutdown of the IC if the Vsus voltage rises to an undesired level. The OVP feedback is also provided to the system control circuit via pin 13 of connector P15 for immediate shutdown of the entire unit.

The P7 (High Voltage Protector) and P8 (Low Voltage Protector) circuit boards monitor the DC output of all power supply boards. If any of the inputs is higher than the desired level, a DC level is output via the “SOS IN” line to pin 1 of connector P16. The operation is the same as the OVP input at pin 6 of the connector P16.

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Contents Troubleshooting Guide Panasonic Services Company National TrainingPage Page Error! Bookmark not defined Objective HD Plasma Display HD Panel Digital Cinema Reality Model Line UpPanasonic Company PI Company F/H SpecificationsHD High-Definition panel FeaturesModel Differences New frontProtection Single Scan SD Rear Cover Removal DisassemblySC2 SC4 Printed Circuit Board Information Table HD PCB Board Layout DiagramTXNP110MHS PCB Board Layout DiagramSD PCB Layout Diagram HY/HZ Board Video Signal Path ExplanationHX Board D1 Board DVI Interface Page Sync Process AV/RGB/PC Input Mode SyncComponent Video Input mode Sync IC9007 A/D Converter IC3001 Video SwitchD1 Board D1 Main ICs OperationD2 Board D2 Board details SC Board Explanation Page Page SS Board Explanation Page Page Standby Power Supply Power Supplies Power Factor Control Main Power SupplyVoltage Regulation Low Voltage Power supplyHigh Voltage Power Supply Page Protection Circuits Page Self Check Display Indication Diagnostic ProceduresPower LED Flashing timing chart No Power Diagnostic Flow ChartsPower LED is red and blinking on/off Power LED blinks twice No Picture Flowchart Are the video signals Correct at the D1 Board input? Dark picture Flowchart Local screen failure Service HintsPage Page Page Page Page Panasonic After Image Prevention Screen Saver FeatureSide Bar Brightness adjustment Accessing the Option Menu Option SettingHidden Option Menu for GPH5D series Option menus Default setting ContentsPage Sample Waveforms CN H2, Pin A8 CN H2, Pin A19 5ms /div 1ms/ div Page HX board Page SC Board Input Signals SC Board Waveforms CLK SS-Board Input Signals SS Board Waveforms Check Zone PDP Defect Pixel SpecificationBoard Connectors Connector TablesBoard Connectors OUT Board Connectors HX- Board Connectors HY / HZ- Board Connectors Panel label Information Adjustment Procedures+B Set-up Adjustment tableAdjustments Item / Preparation Driver Set-upInitialization Pulse Adjust Quick adjustment after P.C.B. exchange B. Printed Circuit Board exchange procedureAdjustment Volume Locations Test Point locations I2C Mode Serviceman modeCAT computer aided test Mode How to access the CAT modeMemory data change CD modeOSD SD ModeI2C Menu Structure Pedestal Setting Alignment ProceduresNtsc 480i White Balance Adjustment 480p White Balance Adjustment 720p White Balance Adjustment 1080i White Balance Adjustment Sub Brightness Setting Non -authorized limited time Service Contact Information
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