Panasonic TC-20B10P Purity and Convergence Adjustments, Dynamic Convergence Adjustment

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120°

Service Adjustments and Calibrations

TC-14B10P / TC-20B10P

PURITY AND CONVERGENCE ADJUSTMENTS

Adjustment is necessary only if the CRT or the deflection yoke is replaced or if the setting was disturbed.

1.When the Yoke or the CRT are substituted:

1.1- Position the deflexion yoke and the convergence ring at the neck of the CRT.

1.2- Position the convergence ring as figure below:

6 pole rings

Purity Rings

Centered

Over G3/G4 Gap

4 pole rings

1.3- Turn on the TV set and tune on a red pattern

1.4- Position the deflection coil to obtain an uniform red at the screen.

1.5- Enter service mode and press RECALL at the remote control to begin purity adjustment mode.

1.6- Leave the set heating up for 30 seconds at white screen.

2.Primary adjustment of estatic convergence (centering)

2.1- Connect a crosshatch generator to the set and tune in signal. Observe misconvergece at center of the screen only.

2.2- Adjust the 4 pole magnet (center rings); separate tabs and rotate to converge blue with red.

2.2- Adjust the 6 pole magnet (rear rings); separate tabs and rotate to convergence blue and red (magenta) with green. Note: Precise convergence at this point is not important.

3- Purity Adjustment

3.1- Position TV set with screen pointed to the east

3.2- Fully degauss the receiver by using an external degaussing coil. 3.3- Press the RECALL button on the Remote Control again

until the Purity Check (green screen) appears.

3.4- Move away the deflection coil and adjust rings 1 and 2 in a way that the red portion stay exactly centered in equal proportions to blue and green. (figure below):

 

 

 

 

 

 

Red

Blue

 

 

 

 

 

Green

 

 

3.5- Slowly move the deflection coil forward until an uniform red is obtained completing the whole screen.

3.6- Fix the deflection coil in place

3.7- Keep RECALL button pressed at the remote control and verify the purity of colours green, blue and white. Recheck for purity and readjust if necessary.

4- Adjustment of estatic convergence

4.1- Apply a crosshatch pattern.

4.2- Overcome the red line to blue adjusting the rings 3 and 4 (adjust center).

4.3- Overcome the red and blue lines with green adjusting the rings 5 and 6 (adjust center)

5- DYNAMIC CONVERGENCE ADJUSTMENT

5.1- Move the DY on a horizontal and vertical way simultaneously, to obtain a perfect side colour overcome.

5.2- Adjust the DY position for the image to stay symmetrical in relation to the geometry of the screen.

5.3- Position the rubber parts to keep the DY in place.

5.4- If necessary, use permalloy to correct convergence on the corners.

Note:To position the rubber parts (skids) to the DY, keep an angle of 120 degrees between each part as is shown on figure below:

Skids (rubber)

120°

120°

5.5- If necessary use permalloy to correct convergence on the corners. 5.6- Put procedure 3.7 into action.

5.7- Exit Service Mode.

VERIFY PURITY ADJUSTMENT WITH THE HELP OF A MICROSCOPE

1- Apply a white pattern.

2- Using a microscope, observe the pixel with a correct format, adjust the purity rings.

3- Using a microscope, observe the pixel on the sides of the screen and compare figure below. To obtain a pixel with a correct format, adjust the deflector coil moving forward and back.

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Contents TC-14B10P TC-20B10P TV ModelImportant Safety Notice HOW to Open the CabinetOperation Guide Operation Guide English Service Adjustments and Calibrations HOW to Operate the DAC Control MX5Y Functions AdjustmentsInspection of the Deflection Circuits and PRE-ADJUSTMENTS Electrical InspectionCUT OFF PRE Adjustments Calibration of Video ifNoise Level Adjustments AFT AdjustmentsAGC-RF Adjustments AdjustmentsCOLOUR-SATURATION Adjustment Video OUT AdjustmentSUB-CONTRAST Adjustments Sharpness AdjustmentWhite Balance PRE Adjustment and CRT CUT OFF Adjustment Horizontal Width and Centering AdjustmentsVertical Height and Centering Adjustments AV in Terminals Checking Focus AdjustmentFront Panel Checking Audio Checking Automatic and Manual MemorizationTune Checking Verify Purity Adjustment with the Help of a Microscope Purity and Convergence AdjustmentsDynamic Convergence Adjustment Schematics Diagrams IC601 Block Diagram IC601 Pins and FunctionsHOW to Obtain Wave Forms Wave Forms / Formas de Onda 01 toWave Forms / Formas de Onda 13 to Como obtener las formas de ondaCabinet Parts Location Vista por ExplosiónDescription Part NO. to TC-14B10P Part NO. to TC-20B10P Cabinet Replacement Parts ListLista de Piezas Mecánicas Assembled Main Board / Placas Montadas Replacement Parts ListLista de Piezas Capacitors / CondensadoresJumpers Diodes / DiodosIntegrated Circuits / Circuitos Integrados BobinasTransistors / Transistores Resistors / ResistenciasCrystals / Osciladores Transformers TransformadoresTuner / Selector DE Canales TC-20B10P Coils / Bobinas DIODE, Zener 2,4Transistors Transistores ERG2ANJ150 RES, Metal Oxido 15 Ohms 2 W Manual de Servicio ModeloComo Abrir EL Gabinete AtenciónAtención Guia Rápido de Operación Guia Rápido de Operación Español Ajuste y Calibración Como Operar EL Control DAC MX5Y Ajuste DE FuncionesInspección Electrica Inspeción DEL Circuito DE Deflexión Y PRE AjustesPRE Ajuste DEL CUT OFF Calibracción DE FI DE VideoAjuste DE AFT Ajuste DEL AGC DE RFAjuste DEL Nivel DE Zumbido Ajuste DE LA Saturación Ajuste DEL Vídeo OUTAjuste DEL SUB-CONTRASTE Ajuste DE SUB-NITIDEZ Y NitidezPRE Ajuste DEL White Balance Y Ajuste DEL CUT OFF DEL CRT Ajuste DE Centro Horizontal HC Y Largura HorizontalAjuste DE LA Altura Vertical Y Centralización Vertical Panel Frontal Ajuste DEL FocoChequeo DE Funcionamiento DEL Verificación DE Funcionamiento DEVerificación DE LA Sintonía DE Canales Chequeo DEL SonidoAjuste DE Pureza Y Convergencia Cuando el CRT o el Yoke fueren sustituidosGrupo CS Apoyo Técnico