Panasonic CT-F2936LC 서비스 매뉴얼 - 페이지 9

{카테고리_이름} Panasonic CT-F2936LC에 대한 서비스 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Panasonic CT-F2936LC 32 페이지. Gp41 chassis
Panasonic CT-F2936LC에 대해서도 마찬가지입니다: 서비스 매뉴얼 (32 페이지)

페이지 인쇄

4.4.

WHITE BALANCE (MARKET MODE CHK 4)

Preparation

1. Receive a colour bar signal with colour "OFF", and operate

the TV set for more than 30 minutes.

2. Set the picture menu to "DYNAMIC NORMAL" and the AI to

off.

3. Connect an oscilloscope to KG on L BOARD.

4. Set the TV set to Market Mode : white balance adjustment

(CHK 4).

5. Screen VR : Min.

6. Set the data level of RGB CUT OFF / DRIVE and SUB

BRIGHT.

Adjustment

1. Select G-CUTOFF adjustment mode and collapse vertical

scan.

2. Adjust G-CUTOFF control to become the DC=0 V to video

level at 180 V as shown in Fig. 1.

3. Slowly turn the screen control clockwise until a green colour

horizontal line appears on the picture tube. This is the

setting point for the screen control.

Note:

Do not adjust the G-CUTOFF setting in the following

procedure.

4. Adjust the remaining R and B-CUTOFF controls so as to

get a white horizontal line on the screen.

5. Return to full field SCAN by pushing the position 5 key on

the remote control.

6. Adjust the R-Drive and B-Drive controls as to obtain a

uniform white on the white bar of the greyscale pattern.

7. Confirm correct B/W rendition and greyscale tracking or

repeat CUTOFF and drive control setup.

Note:

Write down the original value for each address adjustment

before adjusting anything.

Fig. 1

8. Wedge A shown in Fig. 2 should be fixed within a range of

45° to the left of the vertical line as shown.

9. After inserting wedge A, insert wedges B, C and D.

The wedges should be set 90° apart from each other.

10. Be certain that the 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.

CT-F2936LC