Panasonic TC-20B10P Video OUT Adjustment, SUB-CONTRAST Adjustments, COLOUR-SATURATION Adjustment

Service Adjustments and Calibrations TC-14B10P / TC-20B10P

VIDEO OUT ADJUSTMENT

1- REQUIRED EQUIPMENT

1.1- Oscilloscope

1.2- Attenuator

2- PREPARATION

2.1- Apply a COLORBAR patten.

2.2- Adjust the input signal level to 75dB (75Ω open). 2.3- Connect the test tip of oscilloscope to TPE11

3- ADJUSTMENTS

3.1- Select DAC VIDEO (VID) CHQ4 (Service Mode). 3.2- Adjust the video signal level to 1,0±0,05Vo-p using

the keys VOL(+) and VOL(_).

1,0Vo-p

SUB-CONTRAST ADJUSTMENTS

1- REQUIRED EQUIPMENT

1.1- Oscilloscope

1.2- Jumper

1.3- Attenuator

2- PREPARATION

2.1- Tune a COLORBAR patten.

2.2- Adjust the input signal level to 75dB (75Ω open ) 2.3- Connect the jumper between TPE3 and ground 2.4- Connect the oscilloscope between TPE27 and

ground.

2.5- Confirm if Picture Menu is “DYNAMIC”.

2.6- Position the controls at the following positions:

GLOW LIGHT (G-CUT)…...125H BRIGHT……………………..CENTER CONTRAST…………………NORMAL OR MAX. COLOUR…………………….MINIMUM

3- CALIBRATION

3.1- Select DAC SUB BRIGHT (SUB BR) CHQ2.

3.2- Adjust SUB BR until you have a level of 2,2±0,1Vp-p and confirm if there is no deformation of waveform.

3.3- Select DAC SUB-CONTRAST, CHQ2.

3.4- Adjust SUB-CONTRAST level to 2,9±0,1Vp-p at TPE27, as figure below.

Ajusted by Sub-Contraste ← 2,9 ± 0,1 Vp-p

Pedestal level Ajusted by Sub-Bright

← 2,2 ± 0,1 Vp-p

GND

COLOUR-SATURATION ADJUSTMENT

1- REQUIRED EQUIPMENT

1.1- Oscilloscope

1.2- Jumper

2- PREPARATION

2.1- Tune a COLORBAR patten.

2.2- Adjust the input signal level to 75dB (75Ω Open). 2.3- Confirm that the Picture Menu is “DYNAMIC” 2.4- Confirm that channel colour is “NORMAL”

2.5- Confirm that temperature of colour is “NORMAL”

2.6- Connect oscilloscope between TPE27 and ground

2.7- Connect the jumper between TPE3 and ground

2.8- Position controls at the following positions:

GLOW LIGHT (G-CUT)… 25H BRIGHT………….......……NORMAL OR CENTER CONTRAST…………….... NORMAL OR MAX. COLOUR………………… NORMAL OR CENTER

3- ADJUSTMENTS

3.1- Select DAC SUB BRIGHT at CHQ2.

3.2- Adjust SUB BRIGHT to make the pedestal level remain 2,2±0,1Vp-p and confirm that there is no deformation of waveform.

3.3- Select DAC SUB-COLOUR at CHQ2.

3.4- Adjust SUB- COLOUR level to 2,5±0,1Vp-p at TPE27, as shown on figure below:

Adjusted by Sub-Color ← 2,5±0,1 Vp-p

Pedestal level Adjusted by Sub-Bright

← 2,2±0,1 Vp-p

GND

SHARPNESS ADJUSTMENT

1- PREPARATION

1.1- Select sharpness control using Menu IMAGE

1.2- Adjust the control SHARPNESS to center.

2- ADJUSTMENTS

2.1- Select DAC SUB-SHARPNESS at CHQ2.

2.2- Adjust SUB SHARPNESS to(*) using the remote control.

(*)………14”=17H

(*)………20”=1BH

2.3- Press key “N” to exit SERVICE mode.

SHUT DOWN SYSTEM CONFIRMATION

1- REQUIRED EQUIPMENT

1.1- DC power source

1.2- Voltmeter

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