Sony KV-20S90 Picture Tube Removal, Anode CAP Removal Procedure, HOW to Handle AN Anode CAP

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1-4. PICTURE TUBE REMOVAL

WARNING: BEFORE REMOVING THE ANODE CAP

High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove the anode cap. Short between anode and CRT coated earth ground strap.

KV-20S90 / 21SE43C

Coated

Earth

Ground

Strap

	1	10
		10
		5
8		7
6		3
6

2

9

1.Discharge the anode of the CRT and remove the anode cap.

2.Unplug all interconnecting leads from the deﬂ ection yoke, neck assembly, degaussing coils and CRT grounding strap.

3.Remove the C Board from the CRT.

4.Remove the chassis assembly.

5.Loosen the neck assembly ﬁ xing screw and remove.

6.Loosen the deﬂ ection yoke ﬁ xing screw and remove.

7.Place the set with the CRT face down on a cushion and remove the degaussing coil holders.

8.Remove the degaussing coils.

9.Remove the CRT grounding strap and spring tension devices.

10.Unscrew the four CRT ﬁ xing screws [located on each CRT corner] and remove the CRT [Take care not to handle the CRT by the neck].

4

ANODE CAP REMOVAL PROCEDURE

WARNING: High voltage remains in the CRT even after the power is disconnected. To avoid electric shock, discharge CRT before attempting to remove the anode cap. Short between anode and coated earth ground strap of CRT.

NOTE: After removing the anode cap, short circuit the anode of the picture tube and the anode cap to either the metal chassis, CRT shield, or carbon painted on the CRT.

b

a

1 Turn up one side of the rubber cap in	2 Use your thumb to pull the rubber
the direction indicated by arrow a .	cap ﬁrmly in the direction indicated
	by arrow b .

HOW TO HANDLE AN ANODE CAP

1.Do not use sharp objects which may cause damage to the surface of the anode cap.

2.To avoid damaging the anode cap, do not squeeze the rubber covering too hard. A material ﬁtting called a shatter-hook terminal is built into the rubber.

3.Do not force turn the foot of the rubber cover. This may cause the shatter-hook terminal to protrude and damage the rubber.

c

Anode Button

3When one side of the rubber cap separates from the anode button, the anode cap can be removed by turning the rubber cap and pulling it in the direction of arrow c .

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Contents Trinitron Color Television Table of Contents Lbs SpecificationsSAFETY-RELATED Component Warning Leakage Test Safety CHECK-OUTSelf Diagnosis SELF-DIAGNOSTIC FunctionSelf Diagnostic Self-Diagnostic Screen DisplayDisassembly Chassis Assembly Removal Service PositionRear Cover Removal Anode CAP Removal Procedure HOW to Handle AN Anode CAPPicture Tube Removal SET-UP Adjustments Adjustment ProcedureBeam Landing Vertical Static Convergence ConvergengeSCREEN-CORNER Convergence Dynamic Convergence AdjustmentFocus Screen G2Service Adjustment Mode Service Adjustment Mode MemoryWhite Balance Adjustments HOLD-DOWN Readjustment Safety Related AdjustmentsB+ Voltage Confirmation and Adjustment Preparation Before ConfirmationDigital Digital Power Multimeter SupplyCircuit Adjustments Adjustment Items 1 Data Initial AverageFunction Range Data Video Adjustment Items 2 Board Adjustments Frequency AdjustmentID MAP Display Position Adjustment Disp SUB Contrast Adjustment RdrvSUB Bright Adjustment Sbrt SUB HUE, SUB Color Adjustment SHUE, ScolCenter Adjustment Vpos Size Adjustment VsizCenter Adjustment Hpos Linearity VLIN, V. CorrectionPrinted Wiring Board and Schematic Diagram Information DiagramsCircuit Boards Location Reference InformationDY Assy Block Diagram and SchematicsINT Board Schematic DiagramREF. no Location Board Variant Model ListBoard IC Voltage List Board IC Block DiagramsIC521 NJM4558M-TE2 PIN VoltCvco Demod IC301 CXA2133BSDiode Board Locator ListTransistor CrystalsKG KB G2 CRT RGB DRIVE, CRT Drive Semiconductors Chassis KV-20S90/21SE43C Exploded ViewsREF. no Electrical Parts ListCeramic Fuse ConnectorChip Conductor JackCoil Photo CouplerMetal Chip Metal Relay SwitchTuner VaristorRemote Commander Accessories and Packaging2LA TX 1C 3LA TX NIL BA ADS LCS IRD CCV +EVIRD Trinitron Color TV Page Safety Precautions Notification Power Sources Important SafeguardsFor the set with a polarized AC power cord plug Grounding or PolarizationOverloading CleaningObject and Liquid Entry AttachmentsAccessories Power-Cord ProtectionVentilation Outdoor Antenna Grounding Antenna Grounding According to the NECLightning Replacement Parts Damage Requiring ServiceSafety Check ServicingPage Contents Page Introduction Trinitron Color TV FeaturesAbout this Manual Batteries for the Remote ControlTV with indoor or outdoor antenna, or Catv cable Basic ConnectionsConnecting Additional Equipment TV and VCRRear of TV Cable Box Rear of TV TV and Cable BoxVCR TV, VCR, and Cable boxConnecting Headphones Connecting a CamcorderPage Button Description Using the Remote Control and Basic FunctionsIf you lost your remote control, see To perform Auto Setup again Setting Up the TV AutomaticallyMenu Quick Start to the MenusUsing the Video menu To access a menuPress f to Press F to KV-20S90 only Using the Audio menuON/OFF Timer Scheduled viewing Using the Timer menuFavorite Channel Quick access to favorite channels Using the SET UP menuCable Channel SET UP menuContents Defined as Using Parental ControlOverview of the Ratings AgeRating Defined as PG-13NC-17 14+ C8+18+ RatingActivating Parental Lock Initial access into Parental ControlSetting the Rating Using the Custom menuRating TV will allow a maximum rating Information for Parents Resetting your passwordPage Troubleshooting To be cleaned Remote controlLost password Cable stations don’t seem to workFor all models except as noted SpecificationsPage Index TV Rating A. Ratings 20 Unrated Page Page Page Page Page Page Schematic Diagrams NON-SCHEMATIC PagesTo Print Full Size Schematic Diagrams To Print Tiled Version of SchematicsON-SCREEN Search Option Original Manual Issue Date 4/2001