TC-21P50R - Panasonic TV Service Manual (repair manual). Page 12

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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