Panasonic TC-14A12P Service Manual

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Panasonic TC-14A12P Service Manual Manual pdf 23 page image

- 23 -TC-14A12P / TC-20B12Service Adjustments and Calibrations5. VERTICAL HEIGHT (V-AMP 50HZ) CALIBRATION5.1. Receive a PAL-N Philips pattern.5.2. Adjust V-AMP-50Hz so that the Philips pattern’s circle heightbe the same dimension of the width.6. VERTICAL HEIGHT (V-AMP 60HZ) CALIBRATION6.1. Receive a monoscope pattern.6.2. Adjust V-AMP-60Hz so that:[C] and [D] (see below) be 1.9~2.2 (typical 2.0) for 14 inches and1.5~2.0 for 20 inches.[A] and [B] be 1.5~2.3 (typical 2.0) for 14 inches and 1.5~1.6 for20 inches.6.3. Memorize in EEPROM.CRT CUT OFF CALIBRATION1. PREPARATION:1.1. Receive a monoscope pattern.1.2. Position DACs with the data below:• BRT AND S-BRT = 32H.• RGB CONTRAST = 06H for 14 inches and 07H for 20 inches.• SUB-CONTRAST = 21H• R,G,B DRIVE = 31H• R,G CUT = 31H1.3. Press “5” (AKB OFF) and confirm that OSD becomes blue.1.4. Connect the oscilloscope in TPL7 and adjust BRT to obtain130V in the figure below.1.5 Adjust screen to minimum.1.6. Press “5” (AKB ON) and confirm that OSD becomes white.WHITE BALANCE CALIBRATION1. PREPARATION:1.1. This adjustment should be accomplished after 30 minutes ofheating.1.2. Receive a white balance. (This sign should contain burst sign).1.3. Position DAC of MENU OF IMAGE for DYNAMIC NORMAL.1.4. Fully degauss the CRT by using an external degaussing coil.1.5. Position the color analyzer in contact with the face of CRT.• Assure that the CUT OFF voltage calibration has been done.• If the value in the color analyzer is below Y(H) date, adjustCONTRAST for 32 and connect a short circuit jumper betweenTPA10 and TPA20.A BC D130V0V2. CALIBRATION:[1] LOW LIGHT CALIBRATION1. Adjust S-BRT, so that Y = Y(L).2. Adjust R-CUT OFF, so that x = x(L).3. Adjust G-CUT OFF, so that y = y(L).[2] HIGH LIGHT CALIBRATION1. Adjust S-BRT, so that Y = Y(H).2. Adjust R-DRIVE, so that x = x(H).3. Adjust B-DRIVE, so that y = y(H).[3] Repeat the procedures [1] and [2].SUB-BRIGHTNESS CALIBRATION1. PREPARATION:1.1. Receive a windows pattern.1.2. Position MENU OF IMAGE in DYNAMIC NORMAL.2. CALIBRATION:2.1. Position the color analyzer in an low light image area of CRT.2.2. Adjust S-BRT , so that Y=5.5 ± 0.2.SUB-CONTRAST CALIBRATION1. PREPARATION:1.1. Receive a windows pattern.1.2. Position MENU OF IMAGE in DYNAMIC NORMAL.2. CALIBRATION:2.1. Position the color analyzer in an hight light image area of CRT.2. Adjust the SUB-CONTRAST , so that Y=300±10 for14 inches and Y=160±10 for 20 inches.3. If it is impossible to obtain the adjustment above, adjust theSUB-CONTRAST and confirm the SUB-BRIGHTNESSadjustment.FOCUS CALIBRATION1. PREPARATION:• Assure that the SUB-BRIGHTNESS adjustment has beendone.1.1. Receive a Philips or monoscope pattern.1.2. Position MENU OF IMAGE in DYNAMIC NORMAL.2. CALIBRATION:2.1. Adjust the FOCUS variable resistor.1 2 3 3 2 14Using the Philips pattern:• Take as reference to 3rd verticalline.Using the monoscope pattern:• In the number 4