Panasonic TC-21PM30RQ Service Manual ▷ View online
2.7. Adjustment
2.6. PAL Colour
1. Receive the PAL B/G studio colour bar pattern and adjust local frequency at the best tuned position.
2. Pic Menu: Dynamic Normal, Confirm Contrast - 63, Sub Contrast - 21.
3. Channel colour set --------- STD.
4. “CHK2” and press digit key “5” (AKB OFF) also confirm OSD become blue colour.
5. Connect TPA 10 to TPA 20.
6. Set (A) to 2.3 ± 0.2V by BRT (CHK2) at measurement point TPL 2 Fig. 4.
1. Connect oscilloscope probe to TPL 2 (G OUT) with 10k
Ω
series resistor and adjust Contrast so that (B) as in Fig. 4 is 2.6 ± 0.1V.
2. Adjust “Sub Colour” so that waveform as in Fig. 4 (1) 2.5 ± 0.1V.
3. Connect oscilloscope probe to TPL 1 (R OUT) with 10k
Ω
series resistor and confirm waveform as in Fig. 5 is (2) 2.7 ± 0.4V.
4. Take out jumper TPA 10 and TPA 20.
5. Press digit key “5” (AKB ON) and confirm the OSD become white colour.
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TC-21PM30RQ
Colour Purity
1. Set the Brightness and Contrast controls to their maximum
positions.
2. Operate the TV set for 60 minutes.
3. Fully degausse the picture tube by using an external
degaussing coil.
4. Apply a crosshatch pattern signal and adjust the static
convergence magnets to the approximately correct position.
5. Receive a black and white signal.
6. Set the control as follows:
Red................minimum
Green.............minimum
Blue.................minimum
Press the Shipping button on the remote control twice to
select CRT Adjustment Mode to select low light.
Green.............minimum
Blue.................minimum
Press the Shipping button on the remote control twice to
select CRT Adjustment Mode to select low light.
7. Loosen the clamp screw for the Deflection Yoke A in Fig. 10
and move the Deflection Yoke as close to the purity magnet
as possible.
as possible.
8. Adjust the purity magnetic rings so that a vertical green field
is obtained at the centre of the screen.
Fig. 6
9. Slowly push the Deflection Yoke and set it where a uniform
green field is obtained.
Fig. 7
10. Re-adjust the Low Light controls to their correct settings
and make sure that a uniform white field is obtained.
11. Tighten the clamp screw A in Fig. 10.
Convergence
1. Apply a crosshatch pattern signal and Normalize Contrast
control to the maximum positions.
2. Adjust Brightness until the grey position of the crosshatch
pattern just becomes black.
3. Adjust the Red and Blue line at the centre of the screen by
rotating the R-B static.
Fig. 8
4. Adjust Red and Blue with Green line at centre of the screen
by rotating (RB)-G static convergence magnetic rings.
5. Lock convergence magnets with silicone sealer.
6. Remove the DY wedges and slightly tilt the Deflection Yoke
vertically and horizontally to obtain the good overall
convergence.
convergence.
Fig. 9
7. Fix the Deflection Yoke by reinserting the DY wedges. Refer
to Fig. 10.
8. If purity error is found, repeat “Colour Purity” adjustment.
Before Colour Purity, Convergence and White Balance adjustment are attempted,
V. Height, H. Centre and Focus adjustments must be completed.
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TC-21PM30RQ
2.8. Adjustment of CRT VRS
2.8.1. Preparation
a. Set DY to CRT not to tilt up an down left and right deflection.
b. Set CY to CRT and set CY magnet primarily (Fig. 1.).
Purity magnet: Set purity magnet that 2 magnet are (TOP POSITION)
VRS magnet: Set VRS magnet 2 magnet are (HORIZONTAL POSITION)
2.8.2. Adjustment
a. Receive that Cross Hatch pattern.
b. Adjust V-SHIFT-50Hz.
c. Set 2 magnet of horizontal position to up and down eually so that center part of CRT (Fig. 2.)
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TC-21PM30RQ
Fig. 10
Fig. 11
Notes:
1. Wedge A, B and C should be inserted following the sequence of 1, 2 and 3 shown in Fig. 11.
2. The wedges should be set 120° apart from each other.
3. Be certain that three wedges are firmly fixed and the Deflection Yoke is tightly clamped in place.
Otherwise the Deflection Yoke may shift its position and cause a loss of convergence and purity.
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TC-21PM30RQ
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