Panasonic TX-29RX20T Service Manual ▷ View online
1. Confirmation of deflection setting, if not in spec, touch up as below :-
(Service 3)
A) For 60 Hz (4:3 only) :
a. Adjustment of 60 Hz V-CENTER
A) For 60 Hz (4:3 only) :
a. Adjustment of 60 Hz V-CENTER
a. Receive the monoscope pattern (US13).
b. Adjust V-POS 60 Hz offset so that centre of monoscope pattern is at CRT centre.
b. Adjust V-POS 60 Hz offset so that centre of monoscope pattern is at CRT centre.
b. Adjustment 60 Hz V-AMP
a. Receive the monoscope pattern (US13).
b. Adjust V-AMP 60 Hz offset so that
b. Adjust V-AMP 60 Hz offset so that
C, D (Fig. 3) is 2.0 ± 0.1
A, B (Fig. 3) is 2.0 ± 0.1
A, B (Fig. 3) is 2.0 ± 0.1
Fig. 3
c. Adjustment of 60 Hz H-CENTER
a. Receive the monoscope pattern (US13).
b. Adjust H-POS 60 Hz offset so that horizontal position is at centre of CRT.
b. Adjust H-POS 60 Hz offset so that horizontal position is at centre of CRT.
d. Adjustment of 60 Hz H-AMP
a. Receive the monoscope pattern (US13).
b. Adjust H-AMP 60 Hz offset so that both edges are within 2.5 ± 0.2. Refer to Fig. 1.
c. Touch up if necessary.
b. Adjust H-AMP 60 Hz offset so that both edges are within 2.5 ± 0.2. Refer to Fig. 1.
c. Touch up if necessary.
Fig. 1
e. EW ADJUSTMENT
a. Receive crosshatch pattern. (JA7)
b. Adjust the vertical line no. 2 to straight line (parabola) by EW-AMP1 60 Hz offset. (Fig. 3)
c. Touch up if necessary.
b. Adjust the vertical line no. 2 to straight line (parabola) by EW-AMP1 60 Hz offset. (Fig. 3)
c. Touch up if necessary.
Fig. 3
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TX-29RX20T
B) For other Deflection touch up 50 & 60 Hz ; 4:3 & 16:9
1. Adjustment of V-Sym
a. Adjust V-SYM so that a=b in Fig. 1
Fig. 1
2. Adjustment of V-LIN
a. Adjust V-LIN a=b=c=d in Fig. 2.
Fig. 2
3. Adjustment of TRAPEZOID
a. Adjust the vertical line to straight line of both sides of vertical lines (trapezoid) in Fig. 3 by TRAPEZ 1.
Fig. 3
4. Adjustment of UPPER CORNER AND LOWER CORNER
a. Adjust the EW at corner in Fig. 4 by UPPER-CORNER and LOW-CORNER.
Fig. 4
5. Adjustment of ANGLE
a. Adjust ANGLE so that the vertical line is orthogonal to the horizontal line (Fig. 5).
Fig. 5
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TX-29RX20T
6. Adjustment of BOW
a. Adjust BOW so that the vertical lines are straight. (Fig. 6)
Fig. 6
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TX-29RX20T
5 Location of Lead Wiring
5.1. Wire Dressing
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