Sony KV-HF21M80 service manual SELF-DIAGNOSTIC Circuit, +B overcurrent ªOCPº

Page 7

KV-HF21M80

RM-952

6.SELF-DIAGNOSTIC CIRCUIT

IC301

IC001

IC003

Y/CHROMA JUNGLE

SYSTEM

MEMORY

FROM

21

IK-IN

IO-8DAT

45

5 B-DAT

CRT

FROM

MP/

O-LED

[+B] Q604 C3

18

51

PROTECT

SDA 35

46 IO-SDAT

[V]Q509/507

[+B overcurrent ªOCPº]	Occurs when an overcurrent on the +B(135) line is detected by Q604. If Q604 go to ON
	and the voltage to pin 18 of IC301 should go down when V.SYNC is more than seven
	verticals in a period, the unit will automatically turn off.
[Vertical deflection stopped]	Occurs when an absence of the vertical deflection pulse is detected by Q509 and IC001
	shut down the power supply.
[Vertical deflection overcurrent]	Occurs when an overcurrent on V drive line is detected by Q507. Power supply will be
	shut down when detect this by IC001.
[White balance failure]	If the RGB levels* do not balance or become low level within 5 seconds, this error will be
	detected by IC301. TV will stay on, but there will be no picture.
	* (Refers to the RGB levels of the AKB detection Ref pulse that detects IK.)

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Contents Trinitron Color TV KV-HF21M80 SpecificationsSET-UP Adjustments Table of ContentsDiagrams DisassemblyDiagnostic Test Indicators Self Diagnostic FunctionStopping the STANDBY/TIMER Flash Display of STANDBY/TIMER Light Flash CountHandling of SELF-DIAGNOSTIC Screen Display SELF-DIAGNOSTIC Screen Display+B overcurrent ªOCPº SELF-DIAGNOSTIC CircuitConnect the antenna Getting StartedTerminals at the rear of your TV Connecting the 3D WooferPreset the channels automatically Insert the batteries into the remoteConnecting audio/video equipment using the Ú Connecting optional componentsConnecting a camcorder/video game equipment Using the … video input jacksPresetting channels manually Presetting channelsPresetting channels automatically Skipping program numbers Watching the TVSetting the Sleep timer Setting the Wake Up timerChanging the on-screen display language Selecting the picture and sound modes Adjusting the picture and sound settingsSelecting the surround mode Customizing the picture and soundSelecting a favorite channel Changing the favorite channel settingViewing your favorite channels Blocking the channels Child LockSelf-diagnosis function TroubleshootingTroubleshooting Identifying parts and controls Remote ControlBracket Removal Service Position Note Remove F Bracket firstRear Cover Removal Chassis Assy RemovalTerminal Bracket Removal Replacement of PartsDegauss Coil Removal Picture Tube Removal Removal of ANODE-CAP Removing ProceduresBeam Landing Section SET-UP AdjustmentsHorizontal and Vertical Static Convergence ConvergenceYCH TLV G2 Screen and White Balance Adjustments Focus AdjustmentEntering Service Mode Adjustments with CommanderAdjustment Method Adjustment Item Table INF INS TXT OPM OPB Item Information KV-HF21M80Board Adjustment After IC003 Memory Replacement Picture Quality Adjustments SUB Color AdjustmentSUB HUE Adjustment Bell Filter AdjustmentItem Number 00 0B Picture Distortion AdjustmentProsessor Block DiagramCircuit Boards Location Frame Schematic DiagramSecam Schematic Diagrams and Printed Wiring BoardsBoard Waveforms CN901 4P to Speaker Schematic Diagram of a 1/2 BoardSRT Schematic Diagram of a 2/2 BoardBoard IC001 CXP86449-623S Printed Wiring BoardBoard C3 Board Waveforms Schematic Diagrams of C3 and F boardsPrinted Wiring Boards C3 BoardSemiconductors Schematic Diagram of VM1 boardVM1 Board Chassis Exploded ViewsSection Electrical Parts List Elect 1MF REF. NO. Part no Description Diode RN4Z Coil Carbon Metal Metal Oxide SOCKET, CRT Coil VM1 Accessories and Packing Materials 965-767-01