Panasonic TC-20B10P Service Manual

- 10 -TC-14B10P / TC-20B10PService Adjustments and CalibrationsCOLOUR-SATURATION ADJUSTMENT1- REQUIRED EQUIPMENT1.1- Oscilloscope1.2- Jumper2- PREPARATION2.1- Tune a COLORBAR patten.2.2- Adjust the input signal level to 75dB (75Ω Open).2.3- Confirm that the Picture Menu is ìDYNAMICî2.4- Confirm that channel colour is ìNORMALî2.5- Confirm that temperature of colour is ìNORMALî2.6- Connect oscilloscope between TPE27 and ground2.7- Connect the jumper between TPE3 and ground2.8- Position controls at the following positions:G LOW LIGHT (G-CUT)Ö 25HBRIGHTÖÖÖÖ.......ÖÖNORMAL OR CENTERCONTRASTÖÖÖÖÖ.... NORMAL OR MAX.COLOURÖÖÖÖÖÖÖ NORMAL OR CENTER3- ADJUSTMENTS3.1- Select DAC SUB BRIGHT at CHQ2.3.2- Adjust SUB BRIGHT to make the pedestal levelremain 2,2±0,1Vp-p and confirm that there is nodeformation of waveform.3.3- Select DAC SUB-COLOUR at CHQ2.3.4- Adjust SUB- COLOUR level to 2,5±0,1Vp-p atTPE27, as shown on figure below:SHARPNESS ADJUSTMENT1- PREPARATION1.1- Select sharpness control using Menu IMAGE1.2- Adjust the control SHARPNESS to center.2- ADJUSTMENTS2.1- Select DAC SUB-SHARPNESS at CHQ2.2.2- Adjust SUB SHARPNESS to(*) using the remotecontrol.(*)ÖÖÖ14î=17H(*)ÖÖÖ20î=1BH2.3- Press key ìNî to exit SERVICE mode.SHUT DOWN SYSTEM CONFIRMATION1- REQUIRED EQUIPMENT1.1- DC power source1.2- VoltmeterVIDEO OUT ADJUSTMENT1- REQUIRED EQUIPMENT1.1- Oscilloscope1.2- Attenuator2- PREPARATION2.1- Apply a COLORBAR patten.2.2- Adjust the input signal level to 75dB (75Ω open).2.3- Connect the test tip of oscilloscope to TPE113- ADJUSTMENTS3.1- Select DAC VIDEO (VID) CHQ4 (Service Mode).3.2- Adjust the video signal level to 1,0±0,05Vo-p usingthe keys VOL(+) and VOL(_).SUB-CONTRAST ADJUSTMENTS1- REQUIRED EQUIPMENT1.1- Oscilloscope1.2- Jumper1.3- Attenuator2- PREPARATION2.1- Tune a COLORBAR patten.2.2- Adjust the input signal level to 75dB (75Ω open )2.3- Connect the jumper between TPE3 and ground2.4- Connect the oscilloscope between TPE27 andground.2.5- Confirm if Picture Menu is ìDYNAMICî.2.6- Position the controls at the following positions:G LOW LIGHT (G-CUT)Ö...125HBRIGHTÖÖÖÖÖÖÖÖ..CENTERCONTRASTÖÖÖÖÖÖÖNORMAL OR MAX.COLOURÖÖÖÖÖÖÖÖ.MINIMUM3- CALIBRATION3.1- Select DAC SUB BRIGHT (SUB BR) CHQ2.3.2- Adjust SUB BR until you have a level of 2,2±0,1Vp-pand 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 atTPE27, as figure below.Ajusted by Sub-Contraste← 2,9 ± 0,1 Vp-pPedestal levelAjusted by Sub-Bright← 2,2 ± 0,1 Vp-pGND1,0Vo-pAdjusted by Sub-Color← 2,5±0,1 Vp-pPedestal levelAdjusted by Sub-Bright← 2,2±0,1 Vp-pGND