Panasonic TC-14B10P, Service Manual

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TC-14B10P / TC-20B10P Service Adjustments and Calibrations
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 (75
Ω
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:
G LOW 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:
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
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 (75
Ω
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(_).
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 (75
Ω
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:
G LOW 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
1,0Vo-p
Adjusted by Sub-Color
←
2,5±0,1 Vp-p
Pedestal level
Adjusted by Sub-Bright
←
2,2±0,1 Vp-p
GND