DOWNLOAD Panasonic TX-21PM10T Service Manual ↓ Size: 3 MB | Pages: 27 in PDF or view online for FREE

Model
TX-21PM10T
Pages
27
Size
3 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / MX-7
File
tx-21pm10t.pdf
Date

Panasonic TX-21PM10T Service Manual ▷ View online

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. Connect TPA 10 to TPA 20.
5. Set (A) to 2.3 +- 0.2V by BRT (CHK2) Fig. 1.
Adjustment
1. Connect oscilloscope probe to TPA 31 (G OUT) with 10k series resistor and adjust Contrast so
    that (B) as in Fig.1 is 2.8 +- 0.1V.
2. Adjust ‘Sub Colour’ so that waveform as in Fig.1 (1) 2.55 +- 0.1V.
3. Connect oscilloscope probe to TPA 32 (R OUT) with 10k series resistor and confirm waveform as in 
    Fig.2 is (2).2.7 +- 0.4V
Fig. 1
Fig. 2
B
1
 A
2
 A
 0V
Before Colour Purity, Convergence and White Balance adjustment are attempted, 
V. Height, H. Centre and Focus adjustments must be completed. 
Colour Purity
Convergence
1. Set the Brightness and Contrast controls to
  1. Apply a crosshatch pattern signal and
their maximum postions.
 Normalize Contrast control to the
2.  Operate the TV set for 30 minutes.
      maximum positions.
3.  Fully degauss the picture tube by using an
  2. Adjust Brightness until the grey position of
 external degaussing coil.
      the crosshacth pattern just becomes black.
4.  Apply a crosshatch pattern signal and adjust
  3. Adjust the Red and Blue line at the centre of
 the static convergence magnets to the 
      the screen by rotating the R-B static 
 approximately correct position.
5.  Receive a black and White signal.
6.  Set the control as following:
Red ................ minimum
Green ............. minimum
Blue ............... minimum
Press the Shipping button on the remote control
twice to select CRT Adjustment Mode as per
Fig. 16 to select low light.
7. Loosen the clamp screw for the deflection yoke
A in Fig. 24 and move the deflection yoke as close
to the purity magnet as possible.
8. Adjust the purity magnetic rings so that a vertical
green field is obtained at the cntre of the screen.
                                  Fig.22
 4. Adjust Red and Blue with Green line at 
        
     centre of the screen by rotating (RB) -G
     static convergence magnetic rings.
 
5. Lock convergence magnetic with silicne 
    sealer.
 6. Remove the DY wedges and slightly tilt the
     
     deflection yoke vertically and horizontally to
     obtain the good overall convergence.
 Fig.20
9.  Slowly push the deflection yoke and set it where
 a uniform green field is obtained.
10. Re-adjust the Low Light controls to their correct set-
 tings and make sure that a uniform white field is 
 obtained.
 7. Fix the deflection yoke by re-inserting the DY
11. Tighten the clamp screw A in Fig. 24.    
      wedges.Refer to Fig. 24.
 8. If purity error is found, repeat “Colour
     Purity” adjustment.
Slide magnetic tabs toward or away from
each other.
R-B Static
Convergence Magnet
Vertical
Convergence
Red & Blue
Horizontal
Convergence
Red & Blue
  Rotate both magnetic rings together.
                             
R-B Static
Convergence Magnet
 
 Vertical
Horizontal
 
 
 
RGB
R
G
B
R
G
B
 
   BGR
   
 
BGR
Purity Magnet            Green Field
Colour Purity
 
   Green
 
Uniform
green
Fig. 21
Fig. 23
Fig. 24
Fig. 25
Note :
1. Wedge A,B and C should be inserted following the sequence of 1,2 and 3 shown
in Fig. 25.
2. The wedges should be set 120 apart from each other.
3. Be certain that four 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.
 34.0 mm
R-B Static
Convergence Magnet
  
Purity Magne
t
(RB)-G Static
Convergence Magnet
Clamp for
Convergence &
Purity Magnet
Deflection Yoke
°
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