DOWNLOAD Panasonic TC-21P50R Service Manual ↓ Size: 6.16 MB | Pages: 38 in PDF or view online for FREE

- 9 -

Note: Picture will be Changed to the one horizontal line by pressing “5” of 10 key button in the item “  

  “.

1

50 V-HEIGHT

00H-7FH

49H

Vertical Height (50Hz)

2

60 V-HEIGHT

00H-7FH

4CH

Vertical Height (60Hz)

3

PARABOLA

00H-3FH

0AH

Parabola

4

H-WIDTH

00H-3FH

25H

Horizontal Width

5

50 VS CORRECT

00H-3FH

0DH

Vertical S Curve Correction (50Hz)

6

60 VS CORRECT

00H-3FH

16H

Vertical S Curve Correction (60Hz)

7

V-LINEAR

00H-3FH

2EH

Vertical Linearity

8

TRAPEZOID

00H-3FH

20H

Trapezoid

9

EW-CORNER1

00H-0FH

07H

EW-Corner1 (Bottom)

10

EW-CORNER2

00H-0FH

07H

EW-Corner2 (Top)

11

50 H CENTER

00H-1FH

0CH

Horizontal Center (50Hz)

12

V-CENTER

00H-07H

02H

Vertical Center

1

R-CUT

00H-FFH

74H

Red Cut off

2

G-CUT

00H-FFH

7FH

Green Cut off

3

B-CUT

00H-FFH

8AH

Blue Cut off

4

BRIGHT

0-63

33

Bright (the same as user control)

5

SUB BR

00H-FFH

43H

Sub Bright

6

R-DR

00H-FFH

7AH

Red Drive

7

B-DR

00H-FFH

77H

Blue Drive

- 10 -

- 11 -

1. Operate the TV set.
2. Set controls :

Bright..................

minimum

Sub Bright...........

minimum

Volume................

minimum

1. Confirm that the indicated test points for the specified voltage:

1. By using spectrum & attenuator ensure

the RF signal input to the TV is 69dBU
(75 

W

open).

2. Connect digital multimeter to TPA20.

1. Select "RF AGC" indication in CHK2. ON Screen by remote control

at factory mode.

2. Set RF AGC by control volume (-) or (+) at voltage TPA 20 reach

2.6 ± 0.3V.

3. Increase RF signal strength by 2dB. Confirm TPA20 voltage drop.

1. After H-WIDTH Rough Adjustment.
2. Receive the crosshatch pattern.
3. Set to 0 beam.

(screen VR :MIN.   CONTRAST :MIN.)

1. Connect DC voltage meter to D831 Cathode and confirm that +B

voltage is 142.0 ± 2V.

2. Connect High frequency voltmeter to heater, and confirm that voltage

reads                          6.3 ± 0.24 (VRMS)

3. Connect High voltage meter to CRT anode, and confirm that high

voltage is less than 28.5 (+0.7, -1.5)V .

1. Connect oscilloscope probe to TPA41 (G OUT).

2. Receive the PAL colour bar pattern, and

adjust local frequency at the best tuned
position.

3. Connect short-jumper to TPA57 and

TPA50.

4. Connect short-jumper to FBT pin3 and

TPA32.

5. Picture menu : DYNAMIC NORMAL.

AI                   : OFF
Channel colour SET....STD.

6. Set to 2.3 ± 0.2V by BRIGHT.

1. Adjust  Sub-Contrast, so that waveform is 2.5 ± 0.1Vp-p as shown.

1. Receive the PAL colour bar pattern, and

adjust local frequency at the best tuned
position.

2. Connect short-jumper to TPA57 and

TPA50.

3. Connect short-jumper to FBT pin3 and

TPA32.

4. Picture menu : DYNAMIC NORMAL.

AI                   : OFF
Channel colour SET....STD.

5. Set to 2.3 ± 0.2V by BRIGHT.

1. Connect oscilloscope prebe to TPA41 (G OUT) and adjust SUB

COLOUR, so that waveform is 2.5 ± 0.1Vp-p as in Fig.1.

2. Connect oscilloscope prebe to TPA40 (R-OUT) and conform the

waveform is 3.2 ± 0.5Vp-p as in Fig.2. 

2.5±0.1Vp-p

2.3±0.2V

0V

2.5±0.1Vp-p

2.3±0.2V

Fig.1

Fig.2

0V

3.2±0.5Vp-p

2.3±0.2

- 12 -

1. Connect oscilloscope probe to TPA40 (R OUT).

2. Input Rainbow-Pattern (3.58MHz NTSC)

to VIDEO-IN terminal, and set AV mode by
TV/AV select button.

3. Connect short-jumper to TPA57 and

TPA50.

4. Connect short-jumper to FBT pin3 and

TPA32.

5. Picture menu : DYNAMIC NORMAL.

AI                   : OFF
Channel colour SET....STD.

1. Adjust  Sub-NTSC-TINT, so that levels of NO.2, NO.3, NO4 (Fig.1)

become Fig,2.

2. Confirm the waveform is 1.3Vp-p.

1. Receive the SECAM colour bar pattern.

Input RF signal level : 75dB
(75 

W

 opened).

2. Picture menu : DYNAMIC NORMAL.

AI                   : OFF

3. Channel colour SET....STD.
4. Enter factory mode, then go to CHK2.
5. Connect short jumper from FBT pin 3 to

TPA32.

1. Press digit '4' until R-Y appears.
2. Connect oscilloscope prebe to TPA52 (R-Y out).
3. Connect oscilloscope prebe ground to TPA54 (IC601 pin 32. gnd).
4. Adjust R-Y so that point A and point B center line are flat. See Fig.1.

5. Connect oscilloscope prebe to TPA53 (B-Y out). Press digit '4' until B-Y

appears.

6. Adjust B-Y so that point C and D center line are flat. See Fig.2. 

1

2

3

4

5

6

Fig.1

Fig.2

7

8

9

10

A

B

2

3

4

A : B = 2 : 3

A

B

C

Fig.2

Fig.1

D