Panasonic TC-20B10P service manual CUT OFF PRE Adjustments, Calibration of Video if

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Service Adjustments and Calibrations

TC-14B10P / TC-20B10P

2.7- Apply a PHILIPS pattern.

2.8- Adjust BRIGHT, SUB BR, in CHQ5, SCREEN to obtain normal image.

2.9- Check if horizontal width is normal

2.10- Select SUB BR in CHQ5 and check if BRIGHT is controlled by varying SUB BR in CHQ5.

2.11- Select HORIZONTAL CENTERING (HC) in CHQ3 (Service Mode) and adjust convergence.

2.12- Select VERTICAL CENTERING (VC) in CHQ3 (Service Mode) and adjust convergence.

3- PRÉ AJUSTE DO AGC RF.

3.1- Apply a PHILIPS pattern.

3.2- Adjust the signal level to 65±2bB (75Ω open).

3.3- Select RF AGC in CHQ4 Service Mode and increase it pressing VOL(+). Verify if “snow” appear when the RF AGC register is increased. Then decrease it slowly by using VOL(_) until the “snow” has disappeared.

CUT OFF - PRE ADJUSTMENTS

1- REQUIRED EQUIPMENTS.

1.1- Oscilloscope.

1.2- Connect oscilloscope between TPY1 (Q352-C) and ground.

1.3- Position controls/adjust following the information

below:

 

R HIGH LIGHT (R-DR)

40H

B HIGH LIGHT (B-DR)

40H

R LOW LIGHT (R-CUT)

000H

B LOW LIGHT (B-CUT)

000H

G LOW LIGHT (G-CUT)

125H

COR

MINIMUM

CONTRASTE

MAXIMUM

SCREEN

MINIMUM

1.4- Apply a PHILIPS pattern.

1.5- Press “5” at the remote control to obtain a simple horizontal line

1.6- Adjust G-CUT to obtain a reading at TPY1, as figure below.(*)

(*) 20 inch 160 ± 2Vo-p

(*) 14 inch 140 ± 2Vo-p

0V

1.7- Adjust SCREEN until a first line appears at the screen, and don’t change it after this.

1.8- Adjust the other DAC’s that match the other two colours (R-CUT, B-CUT) until it turns the line white.

1.9- Exit to Normal Mode pressing NORMAL at the remote control.

1- SOUND INSPECTION

1.1- Verify if sound varies correctly pressing VOL(+) or VOL(_).

1.2- Verify if tone is adjusted using the “TONE”control at the “SOUND” Menu.

2- INSPECTION OF COLOUR CONTROL

2.1- Apply a PHILIPS pattern.

2.2- Select Pic. Menu DYNAMIC, and adjust NORMAL IMAGE using the remote control.

2.3- To access the function NORMAL IMAGE press MAIN MENU and next press the “<“ or “>” navigation keys to select the function IMAGE.

Press the<“ “ navigation keys to enter menu. Press the ”N” key at the remote control to activate function

NORMAL IMAGE.

2.4- Verify if saturation is normal and sufficcient.

2.5- Confirm the variation of the colour phase acting at the TINT control, receiving NTSC pattern.

3- OTHER INSPECTIONS.

3.1- Tune the VHF, UHF and CATV channels and check if there is good reception.

3.2- Press the key TV/VIDEO and verify ON SCREEN.

3.3- Return to the TV Mode.

CALIBRATION OF VIDEO IF

1- REQUIRED EQUIPMENT

1.1- Monitor

1.2- VIF generator

1.3- VIF detector

1.4- Power source of 9,0 ±0,1V and 4,0 ±0,1V 1.5- Bias box to AGC

1.6- Resistor Jumper of 1KΩ CONEXIONS

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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 ifAFT Adjustments AGC-RF AdjustmentsNoise Level Adjustments AdjustmentsVideo OUT Adjustment SUB-CONTRAST AdjustmentsCOLOUR-SATURATION Adjustment 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 Replacement Parts List Lista de PiezasAssembled Main Board / Placas Montadas Capacitors / CondensadoresDiodes / Diodos Integrated Circuits / Circuitos IntegradosJumpers 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 DEL Vídeo OUT Ajuste DEL SUB-CONTRASTEAjuste DE LA Saturación 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 Ajuste DEL Foco Chequeo DE Funcionamiento DELPanel Frontal 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
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