Adjustments - Panasonic TC-14RM12L P Service Manual

ADJUSTMENTS

ITEM / PREPARATION
WHITE QUALITY CALIBRATION
PREPARATION:
1. Adjust the HELMHOLTZ device to local magnetic field.
Horizontal: 0 ± 0.003 x 10
2. Receive a white purity pattern.
3. Adjust CONTRAST and BRIGHT controls to maximum.
4. Previously adjust the CONVERGENCE.
5. Fully degauss the CRT by using an external degaussing
coil.
CRT CUT OFF VOLTAGE ADJUST
Important: Use proof tip x100 in the CRT cathode.
1. Connect the proof tip in the "G" cathode ("L" P.C.B.).
2. Supply a WINDOW pattern signal.
3. Select picture menu: DYNAMIC NORMAL
4. Adjust SUB-BRIGHTNESS in 0 (zero).
WHITE BALANCE CALIBRATION
1. Adjust the HELMHOLTZ device to local magnetic field.
2. Let the set warm up for a minimum of 30 minutes.
3. Receive a white balance. (This sign should contain
burst sign).
4. Adjust the IMAGE menu to DYNAMIC NORMAL .
5. Fully degauss the CRT by using an external degaussing
coil.
6. Position the color analyzer in contact with the CRT face.
7. Access the SERVICE MODE 1
Assure that not entering light for the meter borders and that the CUT OFF voltage calibration has been done. If the value in the
color analyzer is below 150, adjust CONTRAST to 50 and press "8" in CHK2 mode.
-4 T
TC-14RM12LP/TC-14RM12LP(.)/ TC-20RA12LP/TC-20RA12LP(.)/TC-20RM12LP/TC-20RM12LP(.)
PROCEDURE
CALIBRATION:
1. Adjust the magnetic field in 0.4x10-4T (400 mG), and
check the white quality with the CRT turned to EAST and
to WEST.
2. Receive a red pattern, adjust the COLOR control to
maximum and confirm the purity adjustment.
3. If purity error is found at the CRT corners, apply magnetic
tapes to correct it, fully degauss the CRT again and repeat
the steps 1 and 2. Don't use this magnetic tapes on the
internal side of the yoke.
4. When magnetic tapes be used, fully degauss the face of
CRT (in a horizontal magnetic field = 0 ± 0.03x10-4T),
and repeat the items 1 and 2.
5. Adjust the control of COLOR to MINIMUM, and repeating
the item 1.
CALIBRATION:
1. Set CUT OFF data as below:
Modelo (CRT) 14"
R,G,B CUT OFF 242
2. Adjust the screen trimpot to obtain in the "G" cathode the
voltage (* V) as below (fig.1).
Modelo (CRT) 14"
*V 150
CALIBRATION:
[1] LOW LIGHT CALIBRATION
1. Adjust S-BRT, so that Y = 7
2. Adjust R-CUT OFF, so that x = 0,253 ± 0.01
3. Adjust G-CUT OFF, so that y = 0,249 ± 0.01
[2] HIGH LIGHT CALIBRATION
(Confirm that G-DRIVE is 31 DAC)
1. Adjust S-BRT, so that Y = 150
2. Adjust R-DRIVE, so that x = 0,258 ± 0.01
3. Adjust B-DRIVE, so that y = 0,255 ± 0.01
[3] Repeat the procedures [1] and [2].
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20"
242
20"
150
*V
Fig. 1